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conky/src/linux.cc

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/*
*
* Conky, a system monitor, based on torsmo
*
* Please see COPYING for details
*
* Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
* Copyright (c) 2007 Toni Spets
* Copyright (c) 2005-2021 Brenden Matthews, Philip Kovacs, et. al.
* (see AUTHORS)
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "linux.h"
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/sysinfo.h>
#include <sys/types.h>
#include <clocale>
#include "common.h"
#include "conky.h"
#include "diskio.h"
#include "logging.h"
#include "net_stat.h"
#include "proc.h"
#include "temphelper.h"
#ifndef HAVE_CLOCK_GETTIME
#include <sys/time.h>
#endif
#include <fcntl.h>
#include <unistd.h>
// #include <assert.h>
#include <time.h>
#include <unordered_map>
#include "setting.hh"
#include "top.h"
#include <arpa/inet.h>
#include <linux/sockios.h>
#include <net/if.h>
#include <netinet/in.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#ifdef _NET_IF_H
#define _LINUX_IF_H
#endif
#include <linux/route.h>
#include <linux/version.h>
#include <math.h>
#include <pthread.h>
#include <atomic>
#include <mutex>
/* The following ifdefs were adapted from gkrellm */
#include <linux/major.h>
#if !defined(MD_MAJOR)
#define MD_MAJOR 9
#endif
#if !defined(LVM_BLK_MAJOR)
#define LVM_BLK_MAJOR 58
#endif
#if !defined(NBD_MAJOR)
#define NBD_MAJOR 43
#endif
#if !defined(DM_MAJOR)
#define DM_MAJOR 253
#endif
#ifdef BUILD_WLAN
#include <iwlib.h>
#endif
struct sysfs {
int fd;
int arg;
char devtype[256];
char type[64];
float factor, offset;
};
/* To be used inside upspeed/f downspeed/f as ${gw_iface} variable */
char e_iface[50];
/* To use ${iface X} where X is a number and will
* return the current X NIC name */
static const unsigned int iface_len = 64U;
char interfaces_arr[MAX_NET_INTERFACES][iface_len] = {""};
#define SHORTSTAT_TEMPL "%*s %llu %llu %llu"
#define LONGSTAT_TEMPL "%*s %llu %llu %llu "
static conky::simple_config_setting<bool> top_cpu_separate("top_cpu_separate",
false, true);
/* This flag tells the linux routines to use the /proc system where possible,
* even if other api's are available, e.g. sysinfo() or getloadavg().
* the reason for this is to allow for /proc-based distributed monitoring.
* using a flag in this manner creates less confusing code. */
static int prefer_proc = 0;
/* To tell 'print_sysfs_sensor' whether to print the temperature
* in int or float */
static const char *temp2 = "empty";
void prepare_update(void) {}
int update_uptime(void) {
#ifdef HAVE_SYSINFO
if (!prefer_proc) {
struct sysinfo s_info;
sysinfo(&s_info);
info.uptime = (double)s_info.uptime;
} else
#endif
{
static int reported = 0;
FILE *fp;
if (!(fp = open_file("/proc/uptime", &reported))) {
info.uptime = 0.0;
return 0;
}
if (fscanf(fp, "%lf", &info.uptime) <= 0) info.uptime = 0;
fclose(fp);
}
return 0;
}
int check_mount(struct text_object *obj) {
int ret = 0;
FILE *mtab;
if (!obj->data.s) return 0;
if ((mtab = fopen("/proc/mounts", "r"))) {
char buf1[256], buf2[129];
while (fgets(buf1, 256, mtab)) {
sscanf(buf1, "%*s %128s", buf2);
if (!strcmp(obj->data.s, buf2)) {
ret = 1;
break;
}
}
fclose(mtab);
} else {
NORM_ERR("Could not open mtab");
}
return ret;
}
/* these things are also in sysinfo except Buffers:
* (that's why I'm reading them from proc) */
int update_meminfo(void) {
FILE *meminfo_fp;
static int reported = 0;
/* unsigned int a; */
char buf[256];
/* With multi-threading, calculations that require
* multiple steps to reach a final result can cause havok
* if the intermediary calculations are directly assigned to the
* information struct (they may be read by other functions in the meantime).
* These variables keep the calculations local to the function and finish off
* the function by assigning the results to the information struct */
unsigned long long sreclaimable = 0, curmem = 0, curbufmem = 0,
cureasyfree = 0;
info.memmax = info.memdirty = info.swap = info.swapfree = info.swapmax =
info.memwithbuffers = info.buffers = info.cached = info.memfree =
info.memeasyfree = info.legacymem = info.shmem = info.memavail =
info.free_bufcache = 0;
if (!(meminfo_fp = open_file("/proc/meminfo", &reported))) { return 0; }
while (!feof(meminfo_fp)) {
if (fgets(buf, 255, meminfo_fp) == nullptr) { break; }
if (strncmp(buf, "MemTotal:", 9) == 0) {
sscanf(buf, "%*s %llu", &info.memmax);
} else if (strncmp(buf, "MemFree:", 8) == 0) {
sscanf(buf, "%*s %llu", &info.memfree);
} else if (strncmp(buf, "SwapTotal:", 10) == 0) {
sscanf(buf, "%*s %llu", &info.swapmax);
} else if (strncmp(buf, "SwapFree:", 9) == 0) {
sscanf(buf, "%*s %llu", &info.swapfree);
} else if (strncmp(buf, "Buffers:", 8) == 0) {
sscanf(buf, "%*s %llu", &info.buffers);
} else if (strncmp(buf, "Cached:", 7) == 0) {
sscanf(buf, "%*s %llu", &info.cached);
} else if (strncmp(buf, "Dirty:", 6) == 0) {
sscanf(buf, "%*s %llu", &info.memdirty);
} else if (strncmp(buf, "MemAvailable:", 13) == 0) {
sscanf(buf, "%*s %llu", &info.memavail);
} else if (strncmp(buf, "Shmem:", 6) == 0) {
sscanf(buf, "%*s %llu", &info.shmem);
} else if (strncmp(buf, "SReclaimable:", 13) == 0) {
sscanf(buf, "%*s %llu", &sreclaimable);
}
}
curmem = info.memwithbuffers = info.memmax - info.memfree;
cureasyfree = info.memfree;
info.swap = info.swapmax - info.swapfree;
/* Reclaimable memory: does not include shared memory, which is part of cached
but unreclaimable. Includes the reclaimable part of the Slab cache though.
Note: when shared memory is swapped out, shmem decreases and swapfree
decreases - we want this.
*/
curbufmem = (info.cached - info.shmem) + info.buffers + sreclaimable;
/* Calculate the memory usage.
*
* The Linux Kernel introduced a new field for memory available,
* when possible, use that.
* https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773
*/
if (no_buffers.get(*state)) {
#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 14, 0)
/* Now ('info.mem' - 'info.bufmem') is the *really used* (aka unreclaimable)
memory. When this value reaches the size of the physical RAM, and swap is
full or non-present, OOM happens. Therefore this is the value users want
to monitor, regarding their RAM.
*/
curmem -= curbufmem;
cureasyfree += curbufmem;
#else /* LINUX_VERSION_CODE <= KERNEL_VERSION(3, 14, 0) */
curmem = info.memmax - info.memavail;
cureasyfree += curbufmem;
#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(3, 14, 0) */
}
/* Now that we know that every calculation is finished we can wrap up
* by assigning the values to the information structure */
info.mem = curmem;
info.bufmem = curbufmem;
info.memeasyfree = cureasyfree;
info.legacymem =
info.memmax - (info.memfree + info.buffers + info.cached + sreclaimable);
info.free_bufcache = info.cached + info.buffers + sreclaimable;
fclose(meminfo_fp);
return 0;
}
void print_laptop_mode(struct text_object *obj, char *p,
unsigned int p_max_size) {
FILE *fp;
int val = -1;
(void)obj;
if ((fp = fopen("/proc/sys/vm/laptop_mode", "r")) != nullptr) {
if (fscanf(fp, "%d\n", &val) <= 0) val = 0;
fclose(fp);
}
snprintf(p, p_max_size, "%d", val);
}
/* my system says:
* # cat /sys/block/sda/queue/scheduler
* noop [anticipatory] cfq
*/
void print_ioscheduler(struct text_object *obj, char *p,
unsigned int p_max_size) {
FILE *fp;
char buf[128];
if (!obj->data.s) goto out_fail;
snprintf(buf, 127, "/sys/block/%s/queue/scheduler", obj->data.s);
if ((fp = fopen(buf, "r")) == nullptr) goto out_fail;
while (fscanf(fp, "%127s", buf) == 1) {
if (buf[0] == '[') {
buf[strlen(buf) - 1] = '\0';
snprintf(p, p_max_size, "%s", buf + 1);
fclose(fp);
return;
}
}
fclose(fp);
out_fail:
snprintf(p, p_max_size, "%s", "n/a");
return;
}
class gw_info_s {
public:
gw_info_s() : iface(nullptr), ip(nullptr), count(0) {}
char *iface;
char *ip;
std::atomic<int> count;
std::mutex mutex;
void reset() {
std::lock_guard<std::mutex> lock(mutex);
free_and_zero(iface);
free_and_zero(ip);
}
};
static gw_info_s gw_info;
char *save_set_string(char *x, char *y) {
if (x != nullptr && strcmp((char *)x, (char *)y)) {
free_and_zero(x);
x = strndup("multiple", text_buffer_size.get(*state));
} else if (x == nullptr && y != nullptr) {
x = strndup(y, text_buffer_size.get(*state));
}
return x;
}
void update_gateway_info_failure(const char *reason) {
if (reason != nullptr) { perror(reason); }
// 2 pointers to 1 location causes a crash when we try to free them both
std::unique_lock<std::mutex> lock(gw_info.mutex);
free_and_zero(gw_info.iface);
free_and_zero(gw_info.ip);
gw_info.iface = strndup("failed", text_buffer_size.get(*state));
gw_info.ip = strndup("failed", text_buffer_size.get(*state));
}
/* Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT */
#define RT_ENTRY_FORMAT "%63s %lx %lx %x %*d %*d %*d %lx %*d %*d %*d\n"
FILE *check_procroute() {
FILE *fp;
if ((fp = fopen("/proc/net/route", "r")) == nullptr) {
update_gateway_info_failure("fopen()");
return nullptr;
}
/* skip over the table header line, which is always present */
if (fscanf(fp, "%*[^\n]\n") < 0) {
fclose(fp);
return nullptr;
}
return fp;
}
int update_gateway_info2(void) {
FILE *fp;
char iface[iface_len];
unsigned long dest;
unsigned long gate;
unsigned long mask;
unsigned int flags;
unsigned int x = 1;
unsigned int z = 1;
int strcmpreturn;
if ((fp = check_procroute()) != nullptr) {
while (!feof(fp)) {
strcmpreturn = 1;
if (fscanf(fp, RT_ENTRY_FORMAT, iface, &dest, &gate, &flags, &mask) !=
5) {
update_gateway_info_failure("fscanf()");
break;
}
if (!(dest || mask) && ((flags & RTF_GATEWAY) || !gate)) {
snprintf(e_iface, 49, "%s", iface);
}
if (1U == x) {
snprintf(interfaces_arr[x++], iface_len - 1, "%s", iface);
continue;
} else if (0 == strcmp(iface, interfaces_arr[x - 1])) {
continue;
}
for (z = 1; z < iface_len - 1 && strcmpreturn == 1; z++) {
strcmpreturn = strcmp(iface, interfaces_arr[z]);
}
if (strcmpreturn == 1) {
snprintf(interfaces_arr[x++], iface_len - 1, "%s", iface);
}
}
fclose(fp);
}
return 0;
}
int update_gateway_info(void) {
FILE *fp;
struct in_addr ina;
char iface[iface_len];
unsigned long dest, gate, mask;
unsigned int flags;
gw_info.reset();
gw_info.count = 0;
if ((fp = check_procroute()) != nullptr) {
while (!feof(fp)) {
if (fscanf(fp, RT_ENTRY_FORMAT, iface, &dest, &gate, &flags, &mask) !=
5) {
update_gateway_info_failure("fscanf()");
break;
}
if (!(dest || mask) && ((flags & RTF_GATEWAY) || !gate)) {
gw_info.count++;
snprintf(e_iface, 49, "%s", iface);
std::unique_lock<std::mutex> lock(gw_info.mutex);
gw_info.iface = save_set_string(gw_info.iface, iface);
ina.s_addr = gate;
gw_info.ip = save_set_string(gw_info.ip, inet_ntoa(ina));
}
}
fclose(fp);
}
return 0;
}
void free_gateway_info(struct text_object *obj) {
(void)obj;
gw_info.reset();
}
int gateway_exists(struct text_object *obj) {
(void)obj;
return !!gw_info.count;
}
void print_gateway_iface(struct text_object *obj, char *p,
unsigned int p_max_size) {
(void)obj;
std::lock_guard<std::mutex> lock(gw_info.mutex);
snprintf(p, p_max_size, "%s", gw_info.iface);
}
void print_gateway_iface2(struct text_object *obj, char *p,
unsigned int p_max_size) {
long int z = 0;
unsigned int x = 1;
unsigned int found = 0;
char buf[iface_len * iface_len] = {""};
char *buf_ptr = buf;
if (0 == strcmp(obj->data.s, "")) {
for (; x < iface_len - 1; x++) {
if (0 == strcmp("", interfaces_arr[x])) { break; }
buf_ptr += snprintf(buf_ptr, iface_len - 1, "%s, ", interfaces_arr[x]);
found = 1;
}
if (1 == found) {
--buf_ptr;
*(--buf_ptr) = '\0';
}
snprintf(p, p_max_size, "%s", buf);
return;
}
z = strtol(obj->data.s, (char **)NULL, 10);
if ((iface_len - 1) > z) { snprintf(p, p_max_size, "%s", interfaces_arr[z]); }
}
void print_gateway_ip(struct text_object *obj, char *p,
unsigned int p_max_size) {
(void)obj;
std::lock_guard<std::mutex> lock(gw_info.mutex);
snprintf(p, p_max_size, "%s", gw_info.ip);
}
void update_net_interfaces(FILE *net_dev_fp, bool is_first_update,
double time_between_updates) {
/* read each interface */
#ifdef BUILD_WLAN
// wireless info variables
struct wireless_info *winfo;
struct iwreq wrq;
#endif
for (int i = 0; i < MAX_NET_INTERFACES; i++) {
struct net_stat *ns;
char *s, *p;
long long r, t, last_recv, last_trans;
/* quit only after all non-header lines from /proc/net/dev parsed */
// FIXME: arbitrary size chosen to keep code simple.
char buf[256];
if (fgets(buf, 255, net_dev_fp) == nullptr) { break; }
p = buf;
/* change char * p to first non-space character, which is the beginning
* of the interface name */
while (*p != '\0' && isspace((unsigned char)*p)) { p++; }
s = p;
/* increment p until the end of the interface name has been reached */
while (*p != '\0' && *p != ':') { p++; }
if (*p == '\0') { continue; }
/* replace ':' with '\0' in output of /proc/net/dev */
*p = '\0';
p++;
/* get pointer to interface statistics with the interface name in s */
ns = get_net_stat(s, nullptr, NULL);
ns->up = 1;
memset(&(ns->addr.sa_data), 0, 14);
memset(ns->addrs, 0,
17 * MAX_NET_INTERFACES +
1); /* Up to 17 chars per ip, max MAX_NET_INTERFACES interfaces.
Nasty memory usage... */
/* bytes packets errs drop fifo frame compressed multicast|bytes ... */
sscanf(p, "%lld %*d %*d %*d %*d %*d %*d %*d %lld",
&r, &t);
/* if the interface is parsed the first time, then set recv and trans
* to currently received, meaning the change in network traffic is 0 */
if (ns->last_read_recv == -1) {
ns->recv = r;
is_first_update = true;
ns->last_read_recv = r;
}
if (ns->last_read_trans == -1) {
ns->trans = t;
is_first_update = true;
ns->last_read_trans = t;
}
/* move current traffic statistic to last thereby obsoleting the
* current statistic */
last_recv = ns->recv;
last_trans = ns->trans;
/* If recv or trans is less than last time, an overflow happened.
* In that case set the last traffic to the current one, don't set
* it to 0, else a spike in the download and upload speed will occur! */
if (r < ns->last_read_recv) {
last_recv = r;
} else {
ns->recv += (r - ns->last_read_recv);
}
ns->last_read_recv = r;
if (t < ns->last_read_trans) {
last_trans = t;
} else {
ns->trans += (t - ns->last_read_trans);
}
ns->last_read_trans = t;
/*** ip addr patch ***/
int file_descriptor = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
struct ifconf conf;
conf.ifc_buf = (char *)malloc(sizeof(struct ifreq) * MAX_NET_INTERFACES);
conf.ifc_len = sizeof(struct ifreq) * MAX_NET_INTERFACES;
memset(conf.ifc_buf, 0, conf.ifc_len);
ioctl(file_descriptor, SIOCGIFCONF, &conf);
for (unsigned int k = 0; k < conf.ifc_len / sizeof(struct ifreq); k++) {
struct net_stat *ns2;
if (!(((struct ifreq *)conf.ifc_buf) + k)) break;
ns2 = get_net_stat(((struct ifreq *)conf.ifc_buf)[k].ifr_ifrn.ifrn_name,
nullptr, NULL);
ns2->addr = ((struct ifreq *)conf.ifc_buf)[k].ifr_ifru.ifru_addr;
char temp_addr[18];
snprintf(temp_addr, sizeof(temp_addr), "%u.%u.%u.%u, ",
ns2->addr.sa_data[2] & 255, ns2->addr.sa_data[3] & 255,
ns2->addr.sa_data[4] & 255, ns2->addr.sa_data[5] & 255);
if (nullptr == strstr(ns2->addrs, temp_addr))
strncpy(ns2->addrs + strlen(ns2->addrs), temp_addr, 17);
}
close(file_descriptor);
free(conf.ifc_buf);
/*** end ip addr patch ***/
if (!is_first_update) {
/* calculate instantaneous speeds */
ns->net_rec[0] = (ns->recv - last_recv) / time_between_updates;
ns->net_trans[0] = (ns->trans - last_trans) / time_between_updates;
}
unsigned int curtmp1 = 0;
unsigned int curtmp2 = 0;
/* get an average over the last speed samples */
int samples = net_avg_samples.get(*state);
/* is OpenMP actually useful here? How large is samples? > 1000 ? */
#ifdef HAVE_OPENMP
#pragma omp parallel for reduction(+ : curtmp1, curtmp2) schedule(dynamic, 10)
#endif /* HAVE_OPENMP */
for (int j = 0; j < samples; j++) {
curtmp1 = curtmp1 + ns->net_rec[j];
curtmp2 = curtmp2 + ns->net_trans[j];
}
ns->recv_speed = curtmp1 / (double)samples;
ns->trans_speed = curtmp2 / (double)samples;
if (samples > 1) {
#ifdef HAVE_OPENMP
#pragma omp parallel for schedule(dynamic, 10)
#endif /* HAVE_OPENMP */
for (int j = samples; j > 1; j--) {
ns->net_rec[j - 1] = ns->net_rec[j - 2];
ns->net_trans[j - 1] = ns->net_trans[j - 2];
}
}
#ifdef BUILD_WLAN
/* update wireless info */
winfo = (struct wireless_info *)malloc(sizeof(struct wireless_info));
memset(winfo, 0, sizeof(struct wireless_info));
int skfd = iw_sockets_open();
if (iw_get_basic_config(skfd, s, &(winfo->b)) > -1) {
// set present winfo variables
if (iw_get_range_info(skfd, s, &(winfo->range)) >= 0) {
winfo->has_range = 1;
}
if (iw_get_stats(skfd, s, &(winfo->stats), &winfo->range,
winfo->has_range) >= 0) {
winfo->has_stats = 1;
}
if (iw_get_ext(skfd, s, SIOCGIWAP, &wrq) >= 0) {
winfo->has_ap_addr = 1;
memcpy(&(winfo->ap_addr), &(wrq.u.ap_addr), sizeof(sockaddr));
}
// get bitrate
if (iw_get_ext(skfd, s, SIOCGIWRATE, &wrq) >= 0) {
memcpy(&(winfo->bitrate), &(wrq.u.bitrate), sizeof(iwparam));
iw_print_bitrate(ns->bitrate, 16, winfo->bitrate.value);
}
// get link quality
if (winfo->has_range && winfo->has_stats) {
bool has_qual_level = (winfo->stats.qual.level != 0) ||
(winfo->stats.qual.updated & IW_QUAL_DBM);
if (has_qual_level &&
!(winfo->stats.qual.updated & IW_QUAL_QUAL_INVALID)) {
ns->link_qual = winfo->stats.qual.qual;
if (winfo->range.max_qual.qual > 0) {
ns->link_qual_max = winfo->range.max_qual.qual;
}
}
}
// get ap mac
if (winfo->has_ap_addr) { iw_sawap_ntop(&winfo->ap_addr, ns->ap); }
// get essid
if (winfo->b.has_essid) {
if (winfo->b.essid_on) {
snprintf(ns->essid, 34, "%s", winfo->b.essid);
} else {
snprintf(ns->essid, 34, "%s", "off/any");
}
}
// get channel and freq
if (winfo->b.has_freq) {
if (winfo->has_range == 1) {
ns->channel = iw_freq_to_channel(winfo->b.freq, &(winfo->range));
iw_print_freq_value(ns->freq, 16, winfo->b.freq);
} else {
ns->channel = 0;
ns->freq[0] = 0;
}
}
snprintf(ns->mode, 16, "%s", iw_operation_mode[winfo->b.mode]);
}
iw_sockets_close(skfd);
free(winfo);
#endif
}
}
#ifdef BUILD_IPV6
void update_ipv6_net_stats() {
FILE *file;
char v6addr[33];
char devname[21];
unsigned int netmask, scope;
struct net_stat *ns;
struct v6addr *lastv6;
// remove the old v6 addresses otherwise they are listed multiple times
for (unsigned int i = 0; i < MAX_NET_INTERFACES; i++) {
ns = &netstats[i];
while (ns->v6addrs != nullptr) {
lastv6 = ns->v6addrs;
ns->v6addrs = ns->v6addrs->next;
free(lastv6);
}
}
if ((file = fopen(PROCDIR "/net/if_inet6", "r")) == nullptr) { return; }
while (fscanf(file, "%32s %*02x %02x %02x %*02x %20s\n", v6addr, &netmask,
&scope, devname) != EOF) {
ns = get_net_stat(devname, nullptr, NULL);
if (ns->v6addrs == nullptr) {
lastv6 = (struct v6addr *)malloc(sizeof(struct v6addr));
ns->v6addrs = lastv6;
} else {
lastv6 = ns->v6addrs;
while (lastv6->next) lastv6 = lastv6->next;
lastv6->next = (struct v6addr *)malloc(sizeof(struct v6addr));
lastv6 = lastv6->next;
}
for (int i = 0; i < 16; i++)
sscanf(v6addr + 2 * i, "%2hhx", &(lastv6->addr.s6_addr[i]));
lastv6->netmask = netmask;
switch (scope) {
case 0: // global
lastv6->scope = 'G';
break;
case 16: // host-local
lastv6->scope = 'H';
break;
case 32: // link-local
lastv6->scope = 'L';
break;
case 64: // site-local
lastv6->scope = 'S';
break;
case 128: // compat
lastv6->scope = 'C';
break;
default:
lastv6->scope = '?';
}
lastv6->next = nullptr;
}
fclose(file);
}
#endif /* BUILD_IPV6 */
/**
* Parses information from /proc/net/dev and stores them in ???
*
* For the output format of /proc/net/dev @see http://linux.die.net/man/5/proc
*
* @return always returns 0. May change in the future, e.g. returning non zero
* if some error happened
**/
int update_net_stats(void) {
update_gateway_info();
update_gateway_info2();
FILE *net_dev_fp;
static int reported = 0;
/* variable to notify the parts averaging the download speed, that this
* is the first call ever to this function. This variable can't be used
* to decide if this is the first time an interface was parsed as there
* are many interfaces, which can be activated and deactivated at arbitrary
* times */
static bool is_first_update = true;
// FIXME: arbitrary size chosen to keep code simple.
char buf[256];
double time_between_updates;
/* get delta */
time_between_updates = current_update_time - last_update_time;
if (time_between_updates <= 0.0001) { return 0; }
/* open file /proc/net/dev. If not something went wrong, clear all
* network statistics */
if (!(net_dev_fp = open_file("/proc/net/dev", &reported))) {
clear_net_stats();
return 0;
}
/* ignore first two header lines in file /proc/net/dev. If somethings
* goes wrong, e.g. end of file reached, quit.
* (Why isn't clear_net_stats called for this case ??? */
char *one = fgets(buf, 255, net_dev_fp);
char *two = fgets(buf, 255, net_dev_fp);
if (!one || /* garbage */
!two) { /* garbage (field names) */
fclose(net_dev_fp);
return 0;
}
update_net_interfaces(net_dev_fp, is_first_update, time_between_updates);
#ifdef BUILD_IPV6
update_ipv6_net_stats();
#endif /* BUILD_IPV6 */
is_first_update = false;
fclose(net_dev_fp);
return 0;
}
int result;
int update_total_processes(void) {
DIR *dir;
struct dirent *entry;
int ignore1;
char ignore2;
info.procs = 0;
dir = opendir("/proc");
if (dir) {
while ((entry = readdir(dir))) {
if (sscanf(entry->d_name, "%d%c", &ignore1, &ignore2) == 1) {
info.procs++;
}
}
closedir(dir);
}
return 0;
}
int update_threads(void) {
#ifdef HAVE_SYSINFO
if (!prefer_proc) {
struct sysinfo s_info;
sysinfo(&s_info);
info.threads = s_info.procs;
} else
#endif
{
static int reported = 0;
FILE *fp;
if (!(fp = open_file("/proc/loadavg", &reported))) {
info.threads = 0;
return 0;
}
if (fscanf(fp, "%*f %*f %*f %*d/%hu", &info.threads) <= 0) info.threads = 0;
fclose(fp);
}
return 0;
}
#define CPU_SAMPLE_COUNT 15
struct cpu_info {
unsigned long long cpu_user;
unsigned long long cpu_system;
unsigned long long cpu_nice;
unsigned long long cpu_idle;
unsigned long long cpu_iowait;
unsigned long long cpu_irq;
unsigned long long cpu_softirq;
unsigned long long cpu_steal;
unsigned long long cpu_total;
unsigned long long cpu_active_total;
unsigned long long cpu_last_total;
unsigned long long cpu_last_active_total;
double cpu_val[CPU_SAMPLE_COUNT];
};
static short cpu_setup = 0;
/* Determine if this kernel gives us "extended" statistics information in
* /proc/stat.
* Kernels around 2.5 and earlier only reported user, system, nice, and
* idle values in proc stat.
* Kernels around 2.6 and greater report these PLUS iowait, irq, softirq,
* and steal */
void determine_longstat(char *buf) {
unsigned long long iowait = 0;
KFLAG_SETOFF(KFLAG_IS_LONGSTAT);
/* scanf will either return -1 or 1 because there is only 1 assignment */
if (sscanf(buf, "%*s %*d %*d %*d %*d %llu", &iowait) > 0) {
KFLAG_SETON(KFLAG_IS_LONGSTAT);
}
}
void determine_longstat_file(void) {
#define MAX_PROCSTAT_LINELEN 255
FILE *stat_fp;
static int reported = 0;
char buf[MAX_PROCSTAT_LINELEN + 1];
if (!(stat_fp = open_file("/proc/stat", &reported))) return;
while (!feof(stat_fp) &&
fgets(buf, MAX_PROCSTAT_LINELEN, stat_fp) != nullptr) {
if (strncmp(buf, "cpu", 3) == 0) {
determine_longstat(buf);
break;
}
}
fclose(stat_fp);
}
void get_cpu_count(void) {
FILE *stat_fp;
static int reported = 0;
char buf[256];
char *str1, *str2, *token, *subtoken;
char *saveptr1, *saveptr2;
int subtoken1 = -1;
int subtoken2 = -1;
if (info.cpu_usage) { return; }
if (!(stat_fp = open_file("/sys/devices/system/cpu/present", &reported))) {
return;
}
info.cpu_count = 0;
while (!feof(stat_fp)) {
if (fgets(buf, 255, stat_fp) == nullptr) { break; }
// Do some parsing here to handle skipped cpu numbers. For example,
// for an AMD FX(tm)-6350 Six-Core Processor /sys/.../present reports
// "0,3-7". I assume that chip is really an 8-core die with two cores
// disabled... Presumably you could also get "0,3-4,6", and other
// combos too...
for (str1 = buf;; str1 = nullptr) {
token = strtok_r(str1, ",", &saveptr1);
if (token == nullptr) break;
++info.cpu_count;
subtoken1 = -1;
subtoken2 = -1;
for (str2 = token;; str2 = nullptr) {
subtoken = strtok_r(str2, "-", &saveptr2);
if (subtoken == nullptr) break;
if (subtoken1 < 0)
subtoken1 = strtol(subtoken, nullptr, 10);
else
subtoken2 = strtol(subtoken, nullptr, 10);
}
if (subtoken2 > 0) info.cpu_count += subtoken2 - subtoken1;
}
}
info.cpu_usage = (float *)malloc((info.cpu_count + 1) * sizeof(float));
fclose(stat_fp);
}
#define TMPL_LONGSTAT "%*s %llu %llu %llu %llu %llu %llu %llu %llu"
#define TMPL_SHORTSTAT "%*s %llu %llu %llu %llu"
int update_stat(void) {
FILE *stat_fp;
static int reported = 0;
struct cpu_info *cpu = nullptr;
char buf[256];
int i;
unsigned int idx;
double curtmp;
const char *stat_template = nullptr;
unsigned int malloc_cpu_size = 0;
extern void *global_cpu;
static pthread_mutex_t last_stat_update_mutex = PTHREAD_MUTEX_INITIALIZER;
static double last_stat_update = 0.0;
float cur_total = 0.0;
/* since we use wrappers for this function, the update machinery
* can't eliminate double invocations of this function. Check for
* them here, otherwise cpu_usage counters are freaking out. */
pthread_mutex_lock(&last_stat_update_mutex);
if (last_stat_update == current_update_time) {
pthread_mutex_unlock(&last_stat_update_mutex);
return 0;
}
last_stat_update = current_update_time;
pthread_mutex_unlock(&last_stat_update_mutex);
/* add check for !info.cpu_usage since that mem is freed on a SIGUSR1 */
if (!cpu_setup || !info.cpu_usage) {
get_cpu_count();
cpu_setup = 1;
}
if (!stat_template) {
stat_template =
KFLAG_ISSET(KFLAG_IS_LONGSTAT) ? TMPL_LONGSTAT : TMPL_SHORTSTAT;
}
if (global_cpu) {
cpu = reinterpret_cast<struct cpu_info *>(global_cpu);
} else {
malloc_cpu_size = (info.cpu_count + 1) * sizeof(struct cpu_info);
cpu = (struct cpu_info *)malloc(malloc_cpu_size);
memset(cpu, 0, malloc_cpu_size);
global_cpu = cpu;
}
if (!(stat_fp = open_file("/proc/stat", &reported))) {
info.run_threads = 0;
if (info.cpu_usage) {
memset(info.cpu_usage, 0, info.cpu_count * sizeof(float));
}
return 0;
}
idx = 0;
while (!feof(stat_fp)) {
if (fgets(buf, 255, stat_fp) == nullptr) { break; }
if (strncmp(buf, "procs_running ", 14) == 0) {
sscanf(buf, "%*s %hu", &info.run_threads);
} else if (strncmp(buf, "cpu", 3) == 0) {
double delta;
if (isdigit((unsigned char)buf[3])) {
idx++; // just increment here since the CPU index can skip numbers
} else {
idx = 0;
}
if (idx > info.cpu_count) { continue; }
sscanf(buf, stat_template, &(cpu[idx].cpu_user), &(cpu[idx].cpu_nice),
&(cpu[idx].cpu_system), &(cpu[idx].cpu_idle),
&(cpu[idx].cpu_iowait), &(cpu[idx].cpu_irq),
&(cpu[idx].cpu_softirq), &(cpu[idx].cpu_steal));
cpu[idx].cpu_total = cpu[idx].cpu_user + cpu[idx].cpu_nice +
cpu[idx].cpu_system + cpu[idx].cpu_idle +
cpu[idx].cpu_iowait + cpu[idx].cpu_irq +
cpu[idx].cpu_softirq + cpu[idx].cpu_steal;
cpu[idx].cpu_active_total =
cpu[idx].cpu_total - (cpu[idx].cpu_idle + cpu[idx].cpu_iowait);
delta = current_update_time - last_update_time;
if (delta <= 0.001) { break; }
cur_total = (float)(cpu[idx].cpu_total - cpu[idx].cpu_last_total);
if (cur_total == 0.0) {
cpu[idx].cpu_val[0] = 1.0;
} else {
cpu[idx].cpu_val[0] =
(cpu[idx].cpu_active_total - cpu[idx].cpu_last_active_total) /
cur_total;
}
curtmp = 0;
int samples = std::min(cpu_avg_samples.get(*state), CPU_SAMPLE_COUNT);
for (i = 0; i < samples; i++) { curtmp = curtmp + cpu[idx].cpu_val[i]; }
info.cpu_usage[idx] = curtmp / samples;
cpu[idx].cpu_last_total = cpu[idx].cpu_total;
cpu[idx].cpu_last_active_total = cpu[idx].cpu_active_total;
for (i = samples - 1; i > 0 && i < CPU_SAMPLE_COUNT; i--) {
cpu[idx].cpu_val[i] = cpu[idx].cpu_val[i - 1];
}
}
}
fclose(stat_fp);
return 0;
}
int update_running_processes(void) {
update_stat();
return 0;
}
int update_cpu_usage(void) {
struct timespec tc = {0L, 100L * 1000000L};
update_stat();
if (-1 == (nanosleep(&tc, NULL))) {
NORM_ERR("update_cpu_usage(): nanosleep() failed");
return 0;
}
update_stat();
return 0;
}
void free_cpu(struct text_object *) { /* no-op */
}
// fscanf() that reads floats with points even if you are using a locale where
// floats are with commas
int fscanf_no_i18n(FILE *stream, const char *format, ...) {
int returncode;
va_list ap;
#ifdef BUILD_I18N
char *oldlocale = strdup(setlocale(LC_NUMERIC, nullptr));
setlocale(LC_NUMERIC, "C");
#endif
va_start(ap, format);
returncode = vfscanf(stream, format, ap);
va_end(ap);
#ifdef BUILD_I18N
setlocale(LC_NUMERIC, oldlocale);
free(oldlocale);
#endif
return returncode;
}
int update_load_average(void) {
#ifdef HAVE_GETLOADAVG
if (!prefer_proc) {
double v[3];
getloadavg(v, 3);
info.loadavg[0] = (float)v[0];
info.loadavg[1] = (float)v[1];
info.loadavg[2] = (float)v[2];
} else
#endif
{
static int reported = 0;
FILE *fp;
if (!(fp = open_file("/proc/loadavg", &reported))) {
info.loadavg[0] = info.loadavg[1] = info.loadavg[2] = 0.0;
return 0;
}
if (fscanf_no_i18n(fp, "%f %f %f", &info.loadavg[0], &info.loadavg[1],
&info.loadavg[2]) < 0)
info.loadavg[0] = info.loadavg[1] = info.loadavg[2] = 0.0;
fclose(fp);
}
return 0;
}
/***********************************************************/
/***********************************************************/
/***********************************************************/
static int no_dots(const struct dirent *d) {
if (d->d_name[0] == '.') { return 0; }
return 1;
}
static int get_first_file_in_a_directory(const char *dir, char *s,
int *reported) {
struct dirent **namelist;
int i, n;
n = scandir(dir, &namelist, no_dots, alphasort);
if (n < 0) {
if (!reported || !*reported) {
NORM_ERR("scandir for %s: %s", dir, strerror(errno));
if (reported) { *reported = 1; }
}
return 0;
} else {
if (n == 0) { return 0; }
strncpy(s, namelist[0]->d_name, 255);
s[255] = '\0';
for (i = 0; i < n; i++) { free(namelist[i]); }
free(namelist);
return 1;
}
}
/*
* Convert @dev "0" (hwmon number) or "k10temp" (hwmon name) to "hwmon2/device"
*/
static void get_dev_path(const char *dir, const char *dev, char *out_buf) {
struct dirent **namelist;
char path[256] = {'\0'};
char name[256] = {'\0'};
bool found = false;
size_t size;
int name_fd;
int i;
int n;
int ret;
/* "0" numbered case */
ret = sscanf(dev, "%d", &n);
if (ret == 1) {
snprintf(out_buf, 255, "hwmon%d/device", n);
return;
}
/* "k10temp" name case, need to search hwmon*->name to find a match */
n = scandir(dir, &namelist, no_dots, alphasort);
if (n < 0) {
NORM_ERR("scandir for %s: %s", dir, strerror(errno));
goto not_found;
}
if (n == 0) goto not_found;
/* Search each hwmon%s/name */
for (i = 0; i < n; i++) {
if (found) continue;
snprintf(path, 256, "%s%s/name", dir, namelist[i]->d_name);
name_fd = open(path, O_RDONLY);
if (name_fd < 0) continue;
size = read(name_fd, name, strlen(dev));
if (size < strlen(dev)) {
close(name_fd);
continue;
}
ret = strncmp(dev, name, strlen(dev));
if (!ret) {
found = true;
snprintf(out_buf, 255, "%s/device", namelist[i]->d_name);
}
close(name_fd);
}
/* cleanup */
for (i = 0; i < n; i++) free(namelist[i]);
free(namelist);
if (found) return;
not_found:
out_buf[0] = '\0';
return;
}
static int open_sysfs_sensor(const char *dir, const char *dev, const char *type,
int n, int *divisor, char *devtype) {
char path[256];
char buf[256];
int fd;
int divfd;
memset(buf, 0, sizeof(buf));
/* if device is nullptr or *, get first */
if (dev == nullptr || strcmp(dev, "*") == 0) {
static int reported = 0;
if (!get_first_file_in_a_directory(dir, buf, &reported)) { return -1; }
dev = buf;
}
if (strcmp(dir, "/sys/class/hwmon/") == 0) {
if (*buf) {
/* buf holds result from get_first_file_in_a_directory() above,
* e.g. "hwmon0" -- append "/device" */
strncat(buf, "/device", 255 - strnlen(buf, 255));
} else {
/*
* @dev holds device number N or hwmon name as a string,
* convert them as:
* "0" -> "hwmon0/device"
* "k10temp" -> "hwmon2/device", where hwmon2/name is "k10temp"
*/
get_dev_path(dir, dev, buf);
/* Not found */
if (buf[0] == '\0') {
NORM_ERR("can't parse device \"%s\"", dev);
return -1;
}
dev = buf;
}
}
/* change vol to in, tempf to temp */
if (strcmp(type, "vol") == 0) {
type = "in";
} else if (strcmp(type, "tempf") == 0) {
type = "temp";
} else if (strcmp(type, "temp2") == 0) {
type = "temp";
}
DBGP("%s: dir=%s dev=%s type=%s n=%d\n", __func__, dir, dev, type, n);
/* construct path */
snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
/* first, attempt to open file in /device */
fd = open(path, O_RDONLY);
if (fd < 0) {
/* if it fails, strip the /device from dev and attempt again */
size_t len_to_trunc = std::max((size_t)7, strnlen(buf, 255)) - 7;
buf[len_to_trunc] = 0;
snprintf(path, 255, "%s%s/%s%d_input", dir, dev, type, n);
fd = open(path, O_RDONLY);
if (fd < 0) {
NORM_ERR(
"can't open '%s': %s\nplease check your device or remove this "
"var from " PACKAGE_NAME,
path, strerror(errno));
}
}
strncpy(devtype, path, 255);
if (strcmp(type, "in") == 0 || strcmp(type, "temp") == 0 ||
strcmp(type, "tempf") == 0) {
*divisor = 1;
} else {
*divisor = 0;
}
/* fan does not use *_div as a read divisor */
if (strcmp("fan", type) == 0) { return fd; }
/* test if *_div file exist, open it and use it as divisor */
if (strcmp(type, "tempf") == 0) {
snprintf(path, 255, "%s%s/%s%d_div", dir, "one", "two", n);
} else {
snprintf(path, 255, "%s%s/%s%d_div", dir, dev, type, n);
}
divfd = open(path, O_RDONLY);
if (divfd > 0) {
/* read integer */
char divbuf[64];
int divn;
divn = read(divfd, divbuf, 63);
/* should read until n == 0 but I doubt that kernel will give these
* in multiple pieces. :) */
if (divn < 0) {
NORM_ERR("open_sysfs_sensor(): can't read from sysfs");
} else {
divbuf[divn] = '\0';
*divisor = strtol(divbuf, nullptr, 10);
}
close(divfd);
}
return fd;
}
static double get_sysfs_info(int *fd, int divisor, char *devtype, char *type) {
int val = 0;
if (*fd <= 0) { return 0; }
lseek(*fd, 0, SEEK_SET);
/* read integer */
{
char buf[64];
int n;
n = read(*fd, buf, 63);
/* should read until n == 0 but I doubt that kernel will give these
* in multiple pieces. :) */
if (n < 0) {
NORM_ERR("get_sysfs_info(): read from %s failed\n", devtype);
} else {
buf[n] = '\0';
val = strtol(buf, nullptr, 10);
}
}
close(*fd);
/* open file */
*fd = open(devtype, O_RDONLY);
if (*fd < 0) { NORM_ERR("can't open '%s': %s", devtype, strerror(errno)); }
/* My dirty hack for computing CPU value
* Filedil, from forums.gentoo.org */
/* if (strstr(devtype, "temp1_input") != nullptr) {
return -15.096 + 1.4893 * (val / 1000.0);
} */
/* divide voltage and temperature by 1000 */
/* or if any other divisor is given, use that */
if (0 == (strcmp(type, "temp2"))) {
temp2 = "temp2";
} else {
temp2 = "empty";
}
if (strcmp(type, "tempf") == 0) {
if (divisor > 1) {
return ((val / divisor + 40) * 9.0 / 5) - 40;
} else if (divisor) {
return ((val / 1000.0 + 40) * 9.0 / 5) - 40;
} else {
return ((val + 40) * 9.0 / 5) - 40;
}
} else {
if (divisor > 1) {
return val / divisor;
} else if (divisor) {
return val / 1000.0;
} else {
return val;
}
}
}
#define HWMON_RESET() \
{ \
buf1[0] = 0; \
factor = 1.0; \
offset = 0.0; \
}
static void parse_sysfs_sensor(struct text_object *obj, const char *arg,
const char *path, const char *type) {
char buf1[64], buf2[64];
float factor, offset;
int n, found = 0;
struct sysfs *sf;
memset(buf1, 0, 64);
memset(buf2, 0, 64);
if (sscanf(arg, "%63s %d %f %f", buf2, &n, &factor, &offset) == 4)
found = 1;
else
HWMON_RESET();
if (!found &&
sscanf(arg, "%63s %63s %d %f %f", buf1, buf2, &n, &factor, &offset) == 5)
found = 1;
else if (!found)
HWMON_RESET();
if (!found && sscanf(arg, "%63s %63s %d", buf1, buf2, &n) == 3)
found = 1;
else if (!found)
HWMON_RESET();
if (!found && sscanf(arg, "%63s %d", buf2, &n) == 2)
found = 1;
else if (!found)
HWMON_RESET();
if (!found) {
obj_be_plain_text(obj, "fail");
return;
}
DBGP("parsed %s args: '%s' '%s' %d %f %f\n", type, buf1, buf2, n, factor,
offset);
sf = (struct sysfs *)malloc(sizeof(struct sysfs));
memset(sf, 0, sizeof(struct sysfs));
sf->fd = open_sysfs_sensor(path, (*buf1) ? buf1 : 0, buf2, n, &sf->arg,
sf->devtype);
strncpy(sf->type, buf2, 63);
sf->factor = factor;
sf->offset = offset;
obj->data.opaque = sf;
}
#define PARSER_GENERATOR(name, path) \
void parse_##name##_sensor(struct text_object *obj, const char *arg) { \
parse_sysfs_sensor(obj, arg, path, #name); \
}
PARSER_GENERATOR(i2c, "/sys/bus/i2c/devices/")
PARSER_GENERATOR(hwmon, "/sys/class/hwmon/")
PARSER_GENERATOR(platform, "/sys/bus/platform/devices/")
void print_sysfs_sensor(struct text_object *obj, char *p,
unsigned int p_max_size) {
double r;
struct sysfs *sf = (struct sysfs *)obj->data.opaque;
if (!sf || sf->fd < 0) return;
r = get_sysfs_info(&sf->fd, sf->arg, sf->devtype, sf->type);
r = r * sf->factor + sf->offset;
if (0 == (strcmp(temp2, "temp2"))) {
temp_print(p, p_max_size, r, TEMP_CELSIUS, 0);
} else if (!strncmp(sf->type, "temp", 4)) {
temp_print(p, p_max_size, r, TEMP_CELSIUS, 1);
} else if (r >= 100.0 || r == 0) {
snprintf(p, p_max_size, "%d", (int)r);
} else {
snprintf(p, p_max_size, "%.1f", r);
}
}
void free_sysfs_sensor(struct text_object *obj) {
struct sysfs *sf = (struct sysfs *)obj->data.opaque;
if (!sf) return;
if (sf->fd >= 0) close(sf->fd);
free_and_zero(obj->data.opaque);
}
#define CPUFREQ_PREFIX "/sys/devices/system/cpu"
#define CPUFREQ_POSTFIX "cpufreq/scaling_cur_freq"
/* return system frequency in MHz (use divisor=1) or GHz (use divisor=1000) */
char get_freq(char *p_client_buffer, size_t client_buffer_size,
const char *p_format, int divisor, unsigned int cpu) {
FILE *f;
static int reported = 0;
char frequency[32];
char s[256];
double freq = 0;
if (!p_client_buffer || client_buffer_size <= 0 || !p_format ||
divisor <= 0) {
return 0;
}
if (!prefer_proc) {
char current_freq_file[128];
snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu - 1,
CPUFREQ_POSTFIX);
f = fopen(current_freq_file, "r");
if (f) {
/* if there's a cpufreq /sys node, read the current frequency from
* this node and divide by 1000 to get Mhz. */
if (fgets(s, sizeof(s), f)) {
s[strlen(s) - 1] = '\0';
freq = strtod(s, nullptr);
}
fclose(f);
snprintf(p_client_buffer, client_buffer_size, p_format,
(freq / 1000) / divisor);
return 1;
}
}
// open the CPU information file
f = open_file("/proc/cpuinfo", &reported);
if (!f) {
perror(PACKAGE_NAME ": Failed to access '/proc/cpuinfo' at get_freq()");
return 0;
}
// read the file
while (fgets(s, sizeof(s), f) != nullptr) {
#if defined(__i386) || defined(__x86_64)
// and search for the cpu mhz
if (strncmp(s, "cpu MHz", 7) == 0 && cpu == 0) {
#else
#if defined(__alpha)
// different on alpha
if (strncmp(s, "cycle frequency [Hz]", 20) == 0 && cpu == 0) {
#else
// this is different on ppc for some reason
if (strncmp(s, "clock", 5) == 0 && cpu == 0) {
#endif // defined(__alpha)
#endif // defined(__i386) || defined(__x86_64)
// copy just the number
strncpy(frequency, strchr(s, ':') + 2, 32);
#if defined(__alpha)
// strip " est.\n"
frequency[strlen(frequency) - 6] = '\0';
// kernel reports in Hz
freq = strtod(frequency, nullptr) / 1000000;
#else
// strip \n
frequency[strlen(frequency) - 1] = '\0';
freq = strtod(frequency, nullptr);
#endif
break;
}
if (strncmp(s, "processor", 9) == 0) {
cpu--;
continue;
}
}
fclose(f);
snprintf(p_client_buffer, client_buffer_size, p_format,
(float)freq / divisor);
return 1;
}
#define CPUFREQ_GOVERNOR "cpufreq/scaling_governor"
/* print the CPU scaling governor */
void print_cpugovernor(struct text_object *obj, char *p,
unsigned int p_max_size) {
FILE *fp;
char buf[64];
unsigned int cpu = obj->data.i;
cpu--;
snprintf(buf, 63, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu, CPUFREQ_GOVERNOR);
if ((fp = fopen(buf, "r")) != nullptr) {
while (fscanf(fp, "%63s", buf) == 1) {
snprintf(p, p_max_size, "%s", buf);
fclose(fp);
return;
}
}
}
#define CPUFREQ_VOLTAGE "cpufreq/scaling_voltages"
/* /sys/devices/system/cpu/cpu0/cpufreq/scaling_voltages looks something
* like this:
# frequency voltage
1800000 1340
1600000 1292
1400000 1100
1200000 988
1000000 1116
800000 1004
600000 988
* Peter Tarjan (ptarjan@citromail.hu) */
/* return cpu voltage in mV (use divisor=1) or V (use divisor=1000) */
static char get_voltage(char *p_client_buffer, size_t client_buffer_size,
const char *p_format, int divisor, unsigned int cpu) {
FILE *f;
char s[256];
int freq = 0;
int voltage = 0;
char current_freq_file[128];
int freq_comp = 0;
/* build the voltage file name */
cpu--;
snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
CPUFREQ_POSTFIX);
if (!p_client_buffer || client_buffer_size <= 0 || !p_format ||
divisor <= 0) {
return 0;
}
/* read the current cpu frequency from the /sys node */
f = fopen(current_freq_file, "r");
if (f) {
if (fgets(s, sizeof(s), f)) {
s[strlen(s) - 1] = '\0';
freq = strtod(s, nullptr);
}
fclose(f);
} else {
fprintf(stderr, PACKAGE_NAME ": Failed to access '%s' at ",
current_freq_file);
perror("get_voltage()");
return 0;
}
snprintf(current_freq_file, 127, "%s/cpu%d/%s", CPUFREQ_PREFIX, cpu,
CPUFREQ_VOLTAGE);
/* use the current cpu frequency to find the corresponding voltage */
f = fopen(current_freq_file, "r");
if (f) {
while (!feof(f)) {
char line[256];
if (fgets(line, 255, f) == nullptr) { break; }
sscanf(line, "%d %d", &freq_comp, &voltage);
if (freq_comp == freq) { break; }
}
fclose(f);
} else {
fprintf(stderr, PACKAGE_NAME ": Failed to access '%s' at ",
current_freq_file);
perror("get_voltage()");
return 0;
}
snprintf(p_client_buffer, client_buffer_size, p_format,
(float)voltage / divisor);
return 1;
}
void print_voltage_mv(struct text_object *obj, char *p,
unsigned int p_max_size) {
static int ok = 1;
if (ok) { ok = get_voltage(p, p_max_size, "%.0f", 1, obj->data.i); }
}
void print_voltage_v(struct text_object *obj, char *p,
unsigned int p_max_size) {
static int ok = 1;
if (ok) { ok = get_voltage(p, p_max_size, "%'.3f", 1000, obj->data.i); }
}
#define ACPI_FAN_DIR "/proc/acpi/fan/"
void get_acpi_fan(char *p_client_buffer, size_t client_buffer_size) {
static int reported = 0;
char buf[256];
char buf2[256];
FILE *fp;
if (!p_client_buffer || client_buffer_size <= 0) { return; }
/* yeah, slow... :/ */
if (!get_first_file_in_a_directory(ACPI_FAN_DIR, buf, &reported)) {
snprintf(p_client_buffer, client_buffer_size, "%s", "no fans?");
return;
}
snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_FAN_DIR, buf);
fp = open_file(buf2, &reported);
if (!fp) {
snprintf(p_client_buffer, client_buffer_size, "%s",
"can't open fan's state file");
return;
}
memset(buf, 0, sizeof(buf));
if (fscanf(fp, "%*s %99s", buf) <= 0) perror("fscanf()");
fclose(fp);
snprintf(p_client_buffer, client_buffer_size, "%s", buf);
}
#define SYSFS_AC_ADAPTER_DIR "/sys/class/power_supply"
#define ACPI_AC_ADAPTER_DIR "/proc/acpi/ac_adapter/"
/* Linux 2.6.25 onwards ac adapter info is in
/sys/class/power_supply/AC/
On my system I get the following.
/sys/class/power_supply/AC/uevent:
PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/PNP0C09:00/ACPI0003:00
PHYSDEVBUS=acpi
PHYSDEVDRIVER=ac
POWER_SUPPLY_NAME=AC
POWER_SUPPLY_TYPE=Mains
POWER_SUPPLY_ONLINE=1
Update: it seems the folder name is hardware-dependent. We add an additional
adapter argument, specifying the folder name.
Update: on some systems it's /sys/class/power_supply/ADP1 instead of
/sys/class/power_supply/AC
*/
void get_acpi_ac_adapter(char *p_client_buffer, size_t client_buffer_size,
const char *adapter) {
static int reported = 0;
char buf[256];
char buf2[256];
struct stat sb;
FILE *fp;
if (!p_client_buffer || client_buffer_size <= 0) { return; }
if (adapter)
snprintf(buf2, sizeof(buf2), "%s/%s/uevent", SYSFS_AC_ADAPTER_DIR, adapter);
else {
snprintf(buf2, sizeof(buf2), "%s/AC/uevent", SYSFS_AC_ADAPTER_DIR);
if (stat(buf2, &sb) == -1)
snprintf(buf2, sizeof(buf2), "%s/ADP1/uevent", SYSFS_AC_ADAPTER_DIR);
}
if (stat(buf2, &sb) == 0)
fp = open_file(buf2, &reported);
else
fp = 0;
if (fp) {
/* sysfs processing */
while (!feof(fp)) {
if (fgets(buf, sizeof(buf), fp) == nullptr) break;
if (strncmp(buf, "POWER_SUPPLY_ONLINE=", 20) == 0) {
int online = 0;
sscanf(buf, "POWER_SUPPLY_ONLINE=%d", &online);
snprintf(p_client_buffer, client_buffer_size, "%s-line",
(online ? "on" : "off"));
break;
}
}
fclose(fp);
} else {
/* yeah, slow... :/ */
if (!get_first_file_in_a_directory(ACPI_AC_ADAPTER_DIR, buf, &reported)) {
snprintf(p_client_buffer, client_buffer_size, "%s", "no ac_adapters?");
return;
}
snprintf(buf2, sizeof(buf2), "%s%s/state", ACPI_AC_ADAPTER_DIR, buf);
fp = open_file(buf2, &reported);
if (!fp) {
snprintf(p_client_buffer, client_buffer_size, "%s",
"No ac adapter found.... where is it?");
return;
}
memset(buf, 0, sizeof(buf));
if (fscanf(fp, "%*s %99s", buf) <= 0) perror("fscanf()");
fclose(fp);
snprintf(p_client_buffer, client_buffer_size, "%s", buf);
}
}
/*
/proc/acpi/thermal_zone/THRM/cooling_mode
cooling mode: active
/proc/acpi/thermal_zone/THRM/polling_frequency
<polling disabled>
/proc/acpi/thermal_zone/THRM/state
state: ok
/proc/acpi/thermal_zone/THRM/temperature
temperature: 45 C
/proc/acpi/thermal_zone/THRM/trip_points
critical (S5): 73 C
passive: 73 C: tc1=4 tc2=3 tsp=40 devices=0xcdf6e6c0
*/
#define ACPI_THERMAL_ZONE_DEFAULT "thermal_zone0"
#define ACPI_THERMAL_FORMAT "/sys/class/thermal/%s/temp"
int open_acpi_temperature(const char *name) {
char path[256];
int fd;
if (name == nullptr || strcmp(name, "*") == 0) {
snprintf(path, 255, ACPI_THERMAL_FORMAT, ACPI_THERMAL_ZONE_DEFAULT);
} else {
snprintf(path, 255, ACPI_THERMAL_FORMAT, name);
}
fd = open(path, O_RDONLY);
if (fd < 0) { NORM_ERR("can't open '%s': %s", path, strerror(errno)); }
return fd;
}
static double last_acpi_temp;
static double last_acpi_temp_time;
// the maximum length of the string inside a ACPI_THERMAL_FORMAT file including
// the ending 0
#define MAXTHERMZONELEN 6
double get_acpi_temperature(int fd) {
if (fd <= 0) { return 0; }
/* don't update acpi temperature too often */
if (current_update_time - last_acpi_temp_time < 11.32) {
return last_acpi_temp;
}
last_acpi_temp_time = current_update_time;
/* seek to beginning */
lseek(fd, 0, SEEK_SET);
/* read */
{
char buf[MAXTHERMZONELEN];
int n;
n = read(fd, buf, MAXTHERMZONELEN - 1);
if (n < 0) {
NORM_ERR("can't read fd %d: %s", fd, strerror(errno));
} else {
buf[n] = '\0';
sscanf(buf, "%lf", &last_acpi_temp);
last_acpi_temp /= 1000;
}
}
return last_acpi_temp;
}
/*
hipo@lepakko hipo $ cat /proc/acpi/battery/BAT1/info
present: yes
design capacity: 4400 mAh
last full capacity: 4064 mAh
battery technology: rechargeable
design voltage: 14800 mV
design capacity warning: 300 mAh
design capacity low: 200 mAh
capacity granularity 1: 32 mAh
capacity granularity 2: 32 mAh
model number: 02KT
serial number: 16922
battery type: LION
OEM info: SANYO
*/
/*
hipo@lepakko conky $ cat /proc/acpi/battery/BAT1/state
present: yes
capacity state: ok
charging state: unknown
present rate: 0 mA
remaining capacity: 4064 mAh
present voltage: 16608 mV
*/
/*
2213<@jupetkellari> jupet@lagi-unstable:~$ cat /proc/apm
2213<@jupetkellari> 1.16 1.2 0x03 0x01 0xff 0x10 -1% -1 ?
2213<@jupetkellari> (-1 ollee ei akkua kiinni, koska akku on pydll)
2214<@jupetkellari> jupet@lagi-unstable:~$ cat /proc/apm
2214<@jupetkellari> 1.16 1.2 0x03 0x01 0x03 0x09 98% -1 ?
2238<@jupetkellari> 1.16 1.2 0x03 0x00 0x00 0x01 100% -1 ? ilman verkkovirtaa
2239<@jupetkellari> 1.16 1.2 0x03 0x01 0x00 0x01 99% -1 ? verkkovirralla
2240<@jupetkellari> 1.16 1.2 0x03 0x01 0x03 0x09 100% -1 ? verkkovirralla ja
monitori pll 2241<@jupetkellari> 1.16 1.2 0x03 0x00 0x00 0x01 99% -1 ?
monitori pll mutta ilman verkkovirtaa
*/
/* Kapil Hari Paranjape <kapil@imsc.res.in>
Linux 2.6.24 onwards battery info is in
/sys/class/power_supply/BAT0/
On my system I get the following.
/sys/class/power_supply/BAT0/uevent:
PHYSDEVPATH=/devices/LNXSYSTM:00/device:00/PNP0A03:00/device:01/PNP0C09:00/PNP0C0A:00
PHYSDEVBUS=acpi
PHYSDEVDRIVER=battery
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Discharging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=10800000
POWER_SUPPLY_VOLTAGE_NOW=10780000
POWER_SUPPLY_CURRENT_NOW=13970000
POWER_SUPPLY_ENERGY_FULL_DESIGN=47510000
POWER_SUPPLY_ENERGY_FULL=27370000
POWER_SUPPLY_ENERGY_NOW=11810000
POWER_SUPPLY_MODEL_NAME=IBM-92P1060
POWER_SUPPLY_MANUFACTURER=Panasonic
On some systems POWER_SUPPLY_ENERGY_* is replaced by POWER_SUPPLY_CHARGE_*
*/
/* Tiago Marques Vale <tiagomarquesvale@gmail.com>
Regarding the comment above, since kernel 2.6.36.1 I have
POWER_SUPPLY_POWER_NOW instead of POWER_SUPPLY_CURRENT_NOW
See http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=532000
*/
#define SYSFS_BATTERY_BASE_PATH "/sys/class/power_supply"
#define ACPI_BATTERY_BASE_PATH "/proc/acpi/battery"
#define APM_PATH "/proc/apm"
#define MAX_BATTERY_COUNT 4
static FILE *sysfs_bat_fp[MAX_BATTERY_COUNT] = {nullptr, NULL, NULL, NULL};
static FILE *acpi_bat_fp[MAX_BATTERY_COUNT] = {nullptr, NULL, NULL, NULL};
static FILE *apm_bat_fp[MAX_BATTERY_COUNT] = {nullptr, NULL, NULL, NULL};
static int batteries_initialized = 0;
static char batteries[MAX_BATTERY_COUNT][32];
static int acpi_last_full[MAX_BATTERY_COUNT];
static int acpi_design_capacity[MAX_BATTERY_COUNT];
/* e.g. "charging 75%" */
static char last_battery_str[MAX_BATTERY_COUNT][64];
/* e.g. "3h 15m" */
static char last_battery_time_str[MAX_BATTERY_COUNT][64];
static double last_battery_time[MAX_BATTERY_COUNT];
static int last_battery_perct[MAX_BATTERY_COUNT];
static double last_battery_perct_time[MAX_BATTERY_COUNT];
void init_batteries(void) {
int idx;
if (batteries_initialized) { return; }
#ifdef HAVE_OPENMP
#pragma omp parallel for schedule(dynamic, 10)
#endif /* HAVE_OPENMP */
for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) { batteries[idx][0] = '\0'; }
batteries_initialized = 1;
}
int get_battery_idx(const char *bat) {
int idx;
for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
if (!strlen(batteries[idx]) || !strcmp(batteries[idx], bat)) { break; }
}
/* if not found, enter a new entry */
if (!strlen(batteries[idx])) { snprintf(batteries[idx], 31, "%s", bat); }
return idx;
}
void set_return_value(char *buffer, unsigned int n, int item, int idx);
void get_battery_stuff(char *buffer, unsigned int n, const char *bat,
int item) {
static int idx, rep = 0, rep1 = 0, rep2 = 0;
char acpi_path[128];
char sysfs_path[128];
snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
init_batteries();
idx = get_battery_idx(bat);
/* don't update battery too often */
if (current_update_time - last_battery_time[idx] < 29.5) {
set_return_value(buffer, n, item, idx);
return;
}
last_battery_time[idx] = current_update_time;
memset(last_battery_str[idx], 0, sizeof(last_battery_str[idx]));
memset(last_battery_time_str[idx], 0, sizeof(last_battery_time_str[idx]));
/* first try SYSFS if that fails try ACPI */
if (sysfs_bat_fp[idx] == nullptr && acpi_bat_fp[idx] == NULL &&
apm_bat_fp[idx] == nullptr) {
sysfs_bat_fp[idx] = open_file(sysfs_path, &rep);
}
if (sysfs_bat_fp[idx] == nullptr && acpi_bat_fp[idx] == NULL &&
apm_bat_fp[idx] == nullptr) {
acpi_bat_fp[idx] = open_file(acpi_path, &rep1);
}
if (sysfs_bat_fp[idx] != nullptr) {
/* SYSFS */
int present_rate = -1;
int remaining_capacity = -1;
char charging_state[64];
char present[4];
strncpy(charging_state, "unknown", 64);
while (!feof(sysfs_bat_fp[idx])) {
char buf[256];
if (fgets(buf, 256, sysfs_bat_fp[idx]) == nullptr) break;
/* let's just hope units are ok */
if (strncmp(buf, "POWER_SUPPLY_PRESENT=1", 22) == 0)
strncpy(present, "yes", 4);
else if (strncmp(buf, "POWER_SUPPLY_PRESENT=0", 22) == 0)
strncpy(present, "no", 4);
else if (strncmp(buf, "POWER_SUPPLY_STATUS=", 20) == 0)
sscanf(buf, "POWER_SUPPLY_STATUS=%63s", charging_state);
/* present_rate is not the same as the current flowing now but it
* is the same value which was used in the past. so we continue the
* tradition! */
else if (strncmp(buf, "POWER_SUPPLY_CURRENT_NOW=", 25) == 0)
sscanf(buf, "POWER_SUPPLY_CURRENT_NOW=%d", &present_rate);
else if (strncmp(buf, "POWER_SUPPLY_POWER_NOW=", 23) == 0)
sscanf(buf, "POWER_SUPPLY_POWER_NOW=%d", &present_rate);
else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0)
sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=", 25) == 0)
sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_last_full[idx]);
else if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0)
sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=", 25) == 0)
sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_last_full[idx]);
}
fclose(sysfs_bat_fp[idx]);
sysfs_bat_fp[idx] = nullptr;
/* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
if (remaining_capacity > acpi_last_full[idx])
acpi_last_full[idx] = remaining_capacity; /* normalize to 100% */
/* not present */
if (strcmp(present, "No") == 0) {
strncpy(last_battery_str[idx], "not present", 64);
}
/* charging */
else if (strcmp(charging_state, "Charging") == 0) {
if (acpi_last_full[idx] != 0 && present_rate > 0) {
/* e.g. charging 75% */
snprintf(
last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"charging %i%%",
(int)(((float)remaining_capacity / acpi_last_full[idx]) * 100));
/* e.g. 2h 37m */
format_seconds(
last_battery_time_str[idx], sizeof(last_battery_time_str[idx]) - 1,
(long)(((float)(acpi_last_full[idx] - remaining_capacity) /
present_rate) *
3600));
} else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
snprintf(
last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"charging %d%%",
(int)(((float)remaining_capacity / acpi_last_full[idx]) * 100));
snprintf(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1, "%s", "unknown");
} else {
strncpy(last_battery_str[idx], "charging",
sizeof(last_battery_str[idx]) - 1);
snprintf(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1, "%s", "unknown");
}
}
/* discharging */
else if (strncmp(charging_state, "Discharging", 64) == 0) {
if (present_rate > 0) {
/* e.g. discharging 35% */
snprintf(
last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"discharging %i%%",
(int)(((float)remaining_capacity / acpi_last_full[idx]) * 100));
/* e.g. 1h 12m */
format_seconds(
last_battery_time_str[idx], sizeof(last_battery_time_str[idx]) - 1,
(long)(((float)remaining_capacity / present_rate) * 3600));
} else if (present_rate == 0) { /* Thanks to Nexox for this one */
snprintf(last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"full");
snprintf(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1, "%s", "unknown");
} else {
snprintf(
last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"discharging %d%%",
(int)(((float)remaining_capacity / acpi_last_full[idx]) * 100));
snprintf(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1, "%s", "unknown");
}
}
/* charged */
/* thanks to Lukas Zapletal <lzap@seznam.cz> */
else if (strncmp(charging_state, "Charged", 64) == 0 ||
strncmp(charging_state, "Full", 64) == 0) {
/* Below happens with the second battery on my X40,
* when the second one is empty and the first one
* being charged. */
if (remaining_capacity == 0)
strncpy(last_battery_str[idx], "empty", 64);
else
strncpy(last_battery_str[idx], "charged", 64);
}
/* unknown, probably full / AC */
else {
if (acpi_last_full[idx] != 0 && remaining_capacity != acpi_last_full[idx])
snprintf(
last_battery_str[idx], 64, "unknown %d%%",
(int)(((float)remaining_capacity / acpi_last_full[idx]) * 100));
else
strncpy(last_battery_str[idx], "not present", 64);
}
} else if (acpi_bat_fp[idx] != nullptr) {
/* ACPI */
int present_rate = -1;
int remaining_capacity = -1;
char charging_state[64];
char present[5];
/* read last full capacity if it's zero */
if (acpi_last_full[idx] == 0) {
static int rep3 = 0;
char path[128];
FILE *fp;
snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
fp = open_file(path, &rep3);
if (fp != nullptr) {
while (!feof(fp)) {
char b[256];
if (fgets(b, 256, fp) == nullptr) { break; }
if (sscanf(b, "last full capacity: %d", &acpi_last_full[idx]) != 0) {
break;
}
}
fclose(fp);
}
}
fseek(acpi_bat_fp[idx], 0, SEEK_SET);
strncpy(charging_state, "unknown", 8);
while (!feof(acpi_bat_fp[idx])) {
char buf[256];
if (fgets(buf, 256, acpi_bat_fp[idx]) == nullptr) { break; }
/* let's just hope units are ok */
if (strncmp(buf, "present:", 8) == 0) {
sscanf(buf, "present: %4s", present);
} else if (strncmp(buf, "charging state:", 15) == 0) {
sscanf(buf, "charging state: %63s", charging_state);
} else if (strncmp(buf, "present rate:", 13) == 0) {
sscanf(buf, "present rate: %d", &present_rate);
} else if (strncmp(buf, "remaining capacity:", 19) == 0) {
sscanf(buf, "remaining capacity: %d", &remaining_capacity);
}
}
/* Hellf[i]re notes that remaining capacity can exceed acpi_last_full */
if (remaining_capacity > acpi_last_full[idx]) {
/* normalize to 100% */
acpi_last_full[idx] = remaining_capacity;
}
/* not present */
if (strcmp(present, "no") == 0) {
strncpy(last_battery_str[idx], "not present", 64);
/* charging */
} else if (strcmp(charging_state, "charging") == 0) {
if (acpi_last_full[idx] != 0 && present_rate > 0) {
/* e.g. charging 75% */
snprintf(last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"charging %i%%",
(int)((remaining_capacity * 100) / acpi_last_full[idx]));
/* e.g. 2h 37m */
format_seconds(
last_battery_time_str[idx], sizeof(last_battery_time_str[idx]) - 1,
(long)(((acpi_last_full[idx] - remaining_capacity) * 3600) /
present_rate));
} else if (acpi_last_full[idx] != 0 && present_rate <= 0) {
snprintf(last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"charging %d%%",
(int)((remaining_capacity * 100) / acpi_last_full[idx]));
snprintf(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1, "%s", "unknown");
} else {
strncpy(last_battery_str[idx], "charging",
sizeof(last_battery_str[idx]) - 1);
snprintf(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1, "%s", "unknown");
}
/* discharging */
} else if (strncmp(charging_state, "discharging", 64) == 0) {
if (present_rate > 0) {
/* e.g. discharging 35% */
snprintf(last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"discharging %i%%",
(int)((remaining_capacity * 100) / acpi_last_full[idx]));
/* e.g. 1h 12m */
format_seconds(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1,
(long)((remaining_capacity * 3600) / present_rate));
} else if (present_rate == 0) { /* Thanks to Nexox for this one */
snprintf(last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"charged");
snprintf(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1, "%s", "unknown");
} else {
snprintf(last_battery_str[idx], sizeof(last_battery_str[idx]) - 1,
"discharging %d%%",
(int)((remaining_capacity * 100) / acpi_last_full[idx]));
snprintf(last_battery_time_str[idx],
sizeof(last_battery_time_str[idx]) - 1, "%s", "unknown");
}
/* charged */
} else if (strncmp(charging_state, "charged", 64) == 0) {
/* thanks to Lukas Zapletal <lzap@seznam.cz> */
/* Below happens with the second battery on my X40,
* when the second one is empty and the first one being charged. */
if (remaining_capacity == 0) {
strncpy(last_battery_str[idx], "empty", 6);
} else {
strncpy(last_battery_str[idx], "charged", 8);
}
/* unknown, probably full / AC */
} else {
if (strncmp(charging_state, "Full", 64) == 0) {
strncpy(last_battery_str[idx], "charged", 64);
} else if (acpi_last_full[idx] != 0 &&
remaining_capacity != acpi_last_full[idx]) {
snprintf(last_battery_str[idx], 64, "unknown %d%%",
(int)((remaining_capacity * 100) / acpi_last_full[idx]));
} else {
strncpy(last_battery_str[idx], "not present", 64);
}
}
fclose(acpi_bat_fp[idx]);
acpi_bat_fp[idx] = nullptr;
} else {
/* APM */
if (apm_bat_fp[idx] == nullptr) {
apm_bat_fp[idx] = open_file(APM_PATH, &rep2);
}
if (apm_bat_fp[idx] != nullptr) {
unsigned int ac, status, flag;
int life;
if (fscanf(apm_bat_fp[idx], "%*s %*s %*x %x %x %x %d%%", &ac,
&status, &flag, &life) <= 0)
goto read_bat_fp_end;
if (life == -1) {
/* could check now that there is ac */
snprintf(last_battery_str[idx], 64, "%s", "not present");
/* could check that status == 3 here? */
} else if (ac && life != 100) {
snprintf(last_battery_str[idx], 64, "charging %d%%", life);
} else {
snprintf(last_battery_str[idx], 64, "%d%%", life);
}
read_bat_fp_end:
/* it seemed to buffer it so file must be closed (or could use
* syscalls directly but I don't feel like coding it now) */
fclose(apm_bat_fp[idx]);
apm_bat_fp[idx] = nullptr;
}
}
set_return_value(buffer, n, item, idx);
}
void set_return_value(char *buffer, unsigned int n, int item, int idx) {
switch (item) {
case BATTERY_STATUS:
snprintf(buffer, n, "%s", last_battery_str[idx]);
break;
case BATTERY_TIME:
snprintf(buffer, n, "%s", last_battery_time_str[idx]);
break;
default:
break;
}
}
void get_battery_short_status(char *buffer, unsigned int n, const char *bat) {
get_battery_stuff(buffer, n, bat, BATTERY_STATUS);
if (0 == strncmp("charging", buffer, 8)) {
buffer[0] = 'C';
memmove(buffer + 1, buffer + 8, n - 8);
} else if (0 == strncmp("discharging", buffer, 11)) {
buffer[0] = 'D';
memmove(buffer + 1, buffer + 11, n - 11);
} else if (0 == strncmp("charged", buffer, 7)) {
buffer[0] = 'F';
memmove(buffer + 1, buffer + 7, n - 7);
} else if (0 == strncmp("not present", buffer, 11)) {
buffer[0] = 'N';
memmove(buffer + 1, buffer + 11, n - 11);
} else if (0 == strncmp("empty", buffer, 5)) {
buffer[0] = 'E';
memmove(buffer + 1, buffer + 5, n - 5);
} else if (0 == strncmp("unknown", buffer, 7)) {
buffer[0] = 'U';
memmove(buffer + 1, buffer + 7, n - 7);
}
// Otherwise, don't shorten.
}
void get_battery_power_draw(char *buffer, unsigned int n, const char *bat) {
static int reported = 0;
char current_now_path[256], voltage_now_path[256], current_now_val[256], voltage_now_val[256];
char *ptr;
long current_now, voltage_now;
FILE *current_now_file;
FILE *voltage_now_file;
double result;
snprintf(current_now_path, 255, SYSFS_BATTERY_BASE_PATH "/%s/current_now", bat);
snprintf(voltage_now_path, 255, SYSFS_BATTERY_BASE_PATH "/%s/voltage_now", bat);
current_now_file = open_file(current_now_path, &reported);
voltage_now_file = open_file(voltage_now_path, &reported);
if (current_now_file != nullptr && voltage_now_file != nullptr) {
fgets(current_now_val, 256, current_now_file);
fgets(voltage_now_val, 256, voltage_now_file);
current_now = strtol(current_now_val, &ptr, 10);
voltage_now = strtol(voltage_now_val, &ptr, 10);
result = (double)(current_now*voltage_now)/(double)1000000000000;
snprintf(buffer, n, "%.1f", result);
}
}
int _get_battery_perct(const char *bat) {
static int reported = 0;
int idx;
char acpi_path[128];
char sysfs_path[128];
int remaining_capacity = -1;
snprintf(acpi_path, 127, ACPI_BATTERY_BASE_PATH "/%s/state", bat);
snprintf(sysfs_path, 127, SYSFS_BATTERY_BASE_PATH "/%s/uevent", bat);
idx = get_battery_idx(bat);
/* don't update battery too often */
if (current_update_time - last_battery_perct_time[idx] < 30) {
return last_battery_perct[idx];
}
last_battery_perct_time[idx] = current_update_time;
/* Only check for SYSFS or ACPI */
if (sysfs_bat_fp[idx] == nullptr && acpi_bat_fp[idx] == NULL &&
apm_bat_fp[idx] == nullptr) {
sysfs_bat_fp[idx] = open_file(sysfs_path, &reported);
reported = 0;
}
if (sysfs_bat_fp[idx] == nullptr && acpi_bat_fp[idx] == NULL &&
apm_bat_fp[idx] == nullptr) {
acpi_bat_fp[idx] = open_file(acpi_path, &reported);
}
if (sysfs_bat_fp[idx] != nullptr) {
/* SYSFS */
while (!feof(sysfs_bat_fp[idx])) {
char buf[256];
if (fgets(buf, 256, sysfs_bat_fp[idx]) == nullptr) break;
if (strncmp(buf, "POWER_SUPPLY_CHARGE_NOW=", 24) == 0) {
sscanf(buf, "POWER_SUPPLY_CHARGE_NOW=%d", &remaining_capacity);
} else if (strncmp(buf, "POWER_SUPPLY_CHARGE_FULL=", 25) == 0) {
sscanf(buf, "POWER_SUPPLY_CHARGE_FULL=%d", &acpi_design_capacity[idx]);
} else if (strncmp(buf, "POWER_SUPPLY_ENERGY_NOW=", 24) == 0) {
sscanf(buf, "POWER_SUPPLY_ENERGY_NOW=%d", &remaining_capacity);
} else if (strncmp(buf, "POWER_SUPPLY_ENERGY_FULL=", 25) == 0) {
sscanf(buf, "POWER_SUPPLY_ENERGY_FULL=%d", &acpi_design_capacity[idx]);
}
}
fclose(sysfs_bat_fp[idx]);
sysfs_bat_fp[idx] = nullptr;
} else if (acpi_bat_fp[idx] != nullptr) {
/* ACPI */
/* read last full capacity if it's zero */
if (acpi_design_capacity[idx] == 0) {
static int rep2;
char path[128];
FILE *fp;
snprintf(path, 127, ACPI_BATTERY_BASE_PATH "/%s/info", bat);
fp = open_file(path, &rep2);
if (fp != nullptr) {
while (!feof(fp)) {
char b[256];
if (fgets(b, 256, fp) == nullptr) { break; }
if (sscanf(b, "last full capacity: %d", &acpi_design_capacity[idx]) !=
0) {
break;
}
}
fclose(fp);
}
}
fseek(acpi_bat_fp[idx], 0, SEEK_SET);
while (!feof(acpi_bat_fp[idx])) {
char buf[256];
if (fgets(buf, 256, acpi_bat_fp[idx]) == nullptr) { break; }
if (buf[0] == 'r') {
sscanf(buf, "remaining capacity: %d", &remaining_capacity);
}
}
}
if (remaining_capacity < 0) { return 0; }
/* compute the battery percentage */
last_battery_perct[idx] =
(int)(((float)remaining_capacity / acpi_design_capacity[idx]) * 100);
if (last_battery_perct[idx] > 100) last_battery_perct[idx] = 100;
return last_battery_perct[idx];
}
int get_battery_perct(const char *bat) {
int idx, n = 0, total_capacity = 0, remaining_capacity;
;
#define BATTERY_LEN 8
char battery[BATTERY_LEN];
init_batteries();
/* Check if user asked for the mean percentage of all batteries. */
if (!strcmp(bat, "all")) {
for (idx = 0; idx < MAX_BATTERY_COUNT; idx++) {
snprintf(battery, BATTERY_LEN - 1, "BAT%d", idx);
#undef BATTERY_LEN
remaining_capacity = _get_battery_perct(battery);
if (remaining_capacity > 0) {
total_capacity += remaining_capacity;
n++;
}
}
if (n == 0)
return 0;
else
return total_capacity / n;
} else {
return _get_battery_perct(bat);
}
}
double get_battery_perct_bar(struct text_object *obj) {
int idx;
get_battery_perct(obj->data.s);
idx = get_battery_idx(obj->data.s);
return last_battery_perct[idx];
}
/* On Apple powerbook and ibook:
$ cat /proc/pmu/battery_0
flags : 00000013
charge : 3623
max_charge : 3720
current : 388
voltage : 16787
time rem. : 900
$ cat /proc/pmu/info
PMU driver version : 2
PMU firmware version : 0c
AC Power : 1
Battery count : 1
*/
/* defines as in <linux/pmu.h> */
#define PMU_BATT_PRESENT 0x00000001
#define PMU_BATT_CHARGING 0x00000002
static FILE *pmu_battery_fp;
static FILE *pmu_info_fp;
static char pb_battery_info[3][32];
static double pb_battery_info_update;
void powerbook_update_status(unsigned int flags, int ac);
void powerbook_update_percentage(long timeval, unsigned int flags, int ac,
int charge, int max_charge);
void powerbook_update_time(long timeval);
#define PMU_PATH "/proc/pmu"
void get_powerbook_batt_info(struct text_object *obj, char *buffer,
unsigned int n) {
static int reported = 0;
const char *batt_path = PMU_PATH "/battery_0";
const char *info_path = PMU_PATH "/info";
unsigned int flags = 0;
int charge = 0;
int max_charge = 1;
int ac = -1;
long timeval = -1;
/* don't update battery too often */
if (current_update_time - pb_battery_info_update < 29.5) {
snprintf(buffer, n, "%s", pb_battery_info[obj->data.i]);
return;
}
pb_battery_info_update = current_update_time;
if (pmu_battery_fp == nullptr) {
pmu_battery_fp = open_file(batt_path, &reported);
if (pmu_battery_fp == nullptr) { return; }
}
rewind(pmu_battery_fp);
while (!feof(pmu_battery_fp)) {
char buf[32];
if (fgets(buf, sizeof(buf), pmu_battery_fp) == nullptr) { break; }
if (buf[0] == 'f') {
sscanf(buf, "flags : %8x", &flags);
} else if (buf[0] == 'c' && buf[1] == 'h') {
sscanf(buf, "charge : %d", &charge);
} else if (buf[0] == 'm') {
sscanf(buf, "max_charge : %d", &max_charge);
} else if (buf[0] == 't') {
sscanf(buf, "time rem. : %ld", &timeval);
}
}
pmu_info_fp = open_file(info_path, &reported);
if (pmu_info_fp == nullptr) { return; }
rewind(pmu_info_fp);
while (!feof(pmu_info_fp)) {
char buf[32];
if (fgets(buf, sizeof(buf), pmu_info_fp) == nullptr) { break; }
if (buf[0] == 'A') { sscanf(buf, "AC Power : %d", &ac); }
}
powerbook_update_status(flags, ac);
powerbook_update_percentage(timeval, flags, ac, charge, max_charge);
powerbook_update_time(timeval);
snprintf(buffer, n, "%s", pb_battery_info[obj->data.i]);
}
void powerbook_update_status(unsigned int flags, int ac) {
/* update status string */
if ((ac && !(flags & PMU_BATT_PRESENT))) {
strncpy(pb_battery_info[PB_BATT_STATUS], "AC",
sizeof(pb_battery_info[PB_BATT_STATUS]));
} else if (ac && (flags & PMU_BATT_PRESENT) && !(flags & PMU_BATT_CHARGING)) {
strncpy(pb_battery_info[PB_BATT_STATUS], "charged",
sizeof(pb_battery_info[PB_BATT_STATUS]));
} else if ((flags & PMU_BATT_PRESENT) && (flags & PMU_BATT_CHARGING)) {
strncpy(pb_battery_info[PB_BATT_STATUS], "charging",
sizeof(pb_battery_info[PB_BATT_STATUS]));
} else {
strncpy(pb_battery_info[PB_BATT_STATUS], "discharging",
sizeof(pb_battery_info[PB_BATT_STATUS]));
}
}
void powerbook_update_percentage(long timeval, unsigned int flags, int ac,
int charge, int max_charge) {
/* update percentage string */
if (timeval == 0 && ac && (flags & PMU_BATT_PRESENT) &&
!(flags & PMU_BATT_CHARGING)) {
snprintf(pb_battery_info[PB_BATT_PERCENT],
sizeof(pb_battery_info[PB_BATT_PERCENT]), "%s", "100%%");
} else if (timeval == 0) {
snprintf(pb_battery_info[PB_BATT_PERCENT],
sizeof(pb_battery_info[PB_BATT_PERCENT]), "%s", "unknown");
} else {
snprintf(pb_battery_info[PB_BATT_PERCENT],
sizeof(pb_battery_info[PB_BATT_PERCENT]), "%d%%",
(charge * 100) / max_charge);
}
}
void powerbook_update_time(long timeval) {
/* update time string */
if (timeval == 0) { /* fully charged or battery not present */
snprintf(pb_battery_info[PB_BATT_TIME],
sizeof(pb_battery_info[PB_BATT_TIME]), "%s", "unknown");
} else if (timeval < 60 * 60) { /* don't show secs */
format_seconds_short(pb_battery_info[PB_BATT_TIME],
sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
} else {
format_seconds(pb_battery_info[PB_BATT_TIME],
sizeof(pb_battery_info[PB_BATT_TIME]), timeval);
}
}
#define ENTROPY_AVAIL_PATH "/proc/sys/kernel/random/entropy_avail"
int get_entropy_avail(unsigned int *val) {
static int reported = 0;
FILE *fp;
if (!(fp = open_file(ENTROPY_AVAIL_PATH, &reported))) return 1;
if (fscanf(fp, "%u", val) != 1) return 1;
fclose(fp);
return 0;
}
#define ENTROPY_POOLSIZE_PATH "/proc/sys/kernel/random/poolsize"
int get_entropy_poolsize(unsigned int *val) {
static int reported = 0;
FILE *fp;
if (!(fp = open_file(ENTROPY_POOLSIZE_PATH, &reported))) return 1;
if (fscanf(fp, "%u", val) != 1) return 1;
fclose(fp);
return 0;
}
void print_disk_protect_queue(struct text_object *obj, char *p,
unsigned int p_max_size) {
FILE *fp;
char path[128];
int state;
snprintf(path, 127, "/sys/block/%s/device/unload_heads", obj->data.s);
if (access(path, F_OK)) {
snprintf(path, 127, "/sys/block/%s/queue/protect", obj->data.s);
}
if ((fp = fopen(path, "r")) == nullptr) {
snprintf(p, p_max_size, "%s", "n/a ");
return;
}
if (fscanf(fp, "%d\n", &state) != 1) {
fclose(fp);
snprintf(p, p_max_size, "%s", "failed");
return;
}
fclose(fp);
snprintf(p, p_max_size, "%s", (state > 0) ? "frozen" : "free ");
}
std::unordered_map<std::string, bool> dev_list;
/* Same as sf #2942117 but memoized using a linked list */
int is_disk(char *dev) {
std::string orig(dev);
std::string syspath("/sys/block/");
char *slash;
auto i = dev_list.find(orig);
if (i != dev_list.end()) return i->second;
while ((slash = strchr(dev, '/'))) *slash = '!';
syspath += dev;
return dev_list[orig] = !(access(syspath.c_str(), F_OK));
}
int update_diskio(void) {
FILE *fp;
static int reported = 0;
char buf[512], devbuf[64];
unsigned int major, minor;
int col_count = 0;
struct diskio_stat *cur;
unsigned int reads, writes;
unsigned int total_reads = 0, total_writes = 0;
stats.current = 0;
stats.current_read = 0;
stats.current_write = 0;
if (!(fp = open_file("/proc/diskstats", &reported))) { return 0; }
/* read reads and writes from all disks (minor = 0), including cd-roms
* and floppies, and sum them up */
while (fgets(buf, 512, fp)) {
col_count = sscanf(buf, "%u %u %s %*u %*u %u %*u %*u %*u %u", &major,
&minor, devbuf, &reads, &writes);
/* ignore subdevices (they have only 3 matching entries in their line)
* and virtual devices (LVM, network block devices, RAM disks, Loopback)
*
* XXX: ignore devices which are part of a SW RAID (MD_MAJOR) */
if (col_count == 5 && major != LVM_BLK_MAJOR && major != NBD_MAJOR &&
major != RAMDISK_MAJOR && major != LOOP_MAJOR && major != DM_MAJOR) {
/* check needed for kernel >= 2.6.31, see sf #2942117 */
if (is_disk(devbuf)) {
total_reads += reads;
total_writes += writes;
}
} else {
col_count = sscanf(buf, "%u %u %s %*u %u %*u %u", &major, &minor, devbuf,
&reads, &writes);
if (col_count != 5) { continue; }
}
cur = stats.next;
while (cur && strcmp(devbuf, cur->dev)) cur = cur->next;
if (cur) update_diskio_values(cur, reads, writes);
}
update_diskio_values(&stats, total_reads, total_writes);
fclose(fp);
return 0;
}
void print_distribution(struct text_object *obj, char *p,
unsigned int p_max_size) {
(void)obj;
int i, bytes_read;
char *buf;
struct stat sb;
if (stat("/etc/arch-release", &sb) == 0) {
snprintf(p, p_max_size, "%s", "Arch Linux");
return;
}
snprintf(p, p_max_size, "Unknown");
buf = readfile("/proc/version", &bytes_read, 1);
if (buf) {
/* I am assuming the distribution name is the first string in /proc/version
that:
- is preceded by a '('
- starts with a capital
- is followed by a space and a number
but i am not sure if this is always true... */
for (i = 1; i < bytes_read; i++) {
if (buf[i - 1] == '(' && buf[i] >= 'A' && buf[i] <= 'Z') break;
}
if (i < bytes_read) {
snprintf(p, p_max_size, "%s", &buf[i]);
for (i = 1; p[i]; i++) {
if (p[i - 1] == ' ' && p[i] >= '0' && p[i] <= '9') {
p[i - 1] = 0;
break;
}
}
}
free(buf);
}
}
/******************************************
* Calculate cpu total *
******************************************/
#define TMPL_SHORTPROC "%*s %llu %llu %llu %llu"
#define TMPL_LONGPROC "%*s %llu %llu %llu %llu %llu %llu %llu %llu"
static unsigned long long calc_cpu_total(void) {
static unsigned long long previous_total = 0;
unsigned long long total = 0;
unsigned long long t = 0;
int rc;
int ps;
char line[BUFFER_LEN] = {0};
unsigned long long cpu = 0;
unsigned long long niceval = 0;
unsigned long long systemval = 0;
unsigned long long idle = 0;
unsigned long long iowait = 0;
unsigned long long irq = 0;
unsigned long long softirq = 0;
unsigned long long steal = 0;
const char *template_ =
KFLAG_ISSET(KFLAG_IS_LONGSTAT) ? TMPL_LONGPROC : TMPL_SHORTPROC;
ps = open("/proc/stat", O_RDONLY);
rc = read(ps, line, BUFFER_LEN - 1);
close(ps);
if (rc < 0) { return 0; }
sscanf(line, template_, &cpu, &niceval, &systemval, &idle, &iowait, &irq,
&softirq, &steal);
total = cpu + niceval + systemval + idle + iowait + irq + softirq + steal;
t = total - previous_total;
previous_total = total;
return t;
}
/******************************************
* Calculate each processes cpu *
******************************************/
inline static void calc_cpu_each(unsigned long long total) {
float mul = 100.0;
if (top_cpu_separate.get(*state)) mul *= info.cpu_count;
for (struct process *p = first_process; p; p = p->next)
p->amount = mul * (p->user_time + p->kernel_time) / (float)total;
}
#ifdef BUILD_IOSTATS
static void calc_io_each(void) {
struct process *p;
unsigned long long sum = 0;
for (p = first_process; p; p = p->next) sum += p->read_bytes + p->write_bytes;
if (sum == 0) sum = 1; /* to avoid having NANs if no I/O occurred */
for (p = first_process; p; p = p->next)
p->io_perc = 100.0 * (p->read_bytes + p->write_bytes) / (float)sum;
}
#endif /* BUILD_IOSTATS */
/******************************************
* Extract information from /proc *
******************************************/
#define PROCFS_TEMPLATE "/proc/%d/stat"
#define PROCFS_CMDLINE_TEMPLATE "/proc/%d/cmdline"
/* These are the guts that extract information out of /proc.
* Anyone hoping to port wmtop should look here first. */
static void process_parse_stat(struct process *process) {
char line[BUFFER_LEN] = {0}, filename[BUFFER_LEN], procname[BUFFER_LEN];
char cmdline[BUFFER_LEN] = {0}, cmdline_filename[BUFFER_LEN],
cmdline_procname[BUFFER_LEN];
char basename[BUFFER_LEN] = {0};
char tmpstr[BUFFER_LEN] = {0};
char state[4];
int ps, cmdline_ps;
unsigned long user_time = 0;
unsigned long kernel_time = 0;
int rc;
int endl;
int nice_val;
char *lparen, *rparen;
struct stat process_stat;
snprintf(filename, sizeof(filename), PROCFS_TEMPLATE, process->pid);
snprintf(cmdline_filename, sizeof(cmdline_filename), PROCFS_CMDLINE_TEMPLATE,
process->pid);
ps = open(filename, O_RDONLY);
if (ps == -1) {
/* The process must have finished in the last few jiffies! */
return;
}
if (fstat(ps, &process_stat) != 0) {
close(ps);
return;
}
process->uid = process_stat.st_uid;
/* Mark process as up-to-date. */
process->time_stamp = g_time;
rc = read(ps, line, BUFFER_LEN - 1);
close(ps);
if (rc < 0) { return; }
/* Read /proc/<pid>/cmdline */
cmdline_ps = open(cmdline_filename, O_RDONLY);
if (cmdline_ps < 0) {
/* The process must have finished in the last few jiffies! */
return;
}
endl = read(cmdline_ps, cmdline, BUFFER_LEN - 1);
close(cmdline_ps);
if (endl < 0) { return; }
/* Some processes have null-separated arguments (see proc(5)); let's fix it */
int i = endl;
while (i && cmdline[i - 1] == 0) {
/* Skip past any trailing null characters */
--i;
}
while (i--) {
/* Replace null character between arguments with a space */
if (cmdline[i] == 0) { cmdline[i] = ' '; }
}
cmdline[endl] = 0;
/* We want to transform for example "/usr/bin/python program.py" to "python
* program.py"
* 1. search for first space
* 2. search for last / before first space
* 3. copy string from its position
*/
char *space_ptr = strchr(cmdline, ' ');
if (space_ptr == nullptr) {
strncpy(tmpstr, cmdline, BUFFER_LEN);
} else {
long int space_pos = space_ptr - cmdline;
strncpy(tmpstr, cmdline, space_pos);
tmpstr[space_pos] = 0;
}
char *slash_ptr = strrchr(tmpstr, '/');
if (slash_ptr == nullptr) {
strncpy(cmdline_procname, cmdline, BUFFER_LEN);
} else {
long int slash_pos = slash_ptr - tmpstr;
strncpy(cmdline_procname, cmdline + slash_pos + 1, BUFFER_LEN - slash_pos);
cmdline_procname[BUFFER_LEN - slash_pos] = 0;
}
/* Extract cpu times from data in /proc filesystem */
lparen = strchr(line, '(');
rparen = strrchr(line, ')');
if (!lparen || !rparen || rparen < lparen) return; // this should not happen
rc = MIN((unsigned)(rparen - lparen - 1), sizeof(procname) - 1);
strncpy(procname, lparen + 1, rc);
procname[rc] = '\0';
strncpy(basename, procname, strlen(procname) + 1);
if (strlen(procname) < strlen(cmdline_procname))
strncpy(procname, cmdline_procname, strlen(cmdline_procname) + 1);
rc = sscanf(rparen + 1,
"%3s %*s %*s %*s %*s %*s %*s %*s %*s %*s %*s %lu "
"%lu %*s %*s %*s %d %*s %*s %*s %llu %llu",
state, &process->user_time, &process->kernel_time, &nice_val,
&process->vsize, &process->rss);
if (rc < 6) {
NORM_ERR("scanning data for %s failed, got only %d fields", procname, rc);
return;
}
if (state[0] == 'R') ++info.run_procs;
free_and_zero(process->name);
free_and_zero(process->basename);
process->name = strndup(procname, text_buffer_size.get(*::state));
process->basename = strndup(basename, text_buffer_size.get(*::state));
process->rss *= getpagesize();
process->total_cpu_time = process->user_time + process->kernel_time;
if (process->previous_user_time == ULONG_MAX) {
process->previous_user_time = process->user_time;
}
if (process->previous_kernel_time == ULONG_MAX) {
process->previous_kernel_time = process->kernel_time;
}
/* strangely, the values aren't monotonous */
if (process->previous_user_time > process->user_time)
process->previous_user_time = process->user_time;
if (process->previous_kernel_time > process->kernel_time)
process->previous_kernel_time = process->kernel_time;
/* store the difference of the user_time */
user_time = process->user_time - process->previous_user_time;
kernel_time = process->kernel_time - process->previous_kernel_time;
/* backup the process->user_time for next time around */
process->previous_user_time = process->user_time;
process->previous_kernel_time = process->kernel_time;
/* store only the difference of the user_time here... */
process->user_time = user_time;
process->kernel_time = kernel_time;
}
#ifdef BUILD_IOSTATS
#define PROCFS_TEMPLATE_IO "/proc/%d/io"
static void process_parse_io(struct process *process) {
static const char *read_bytes_str = "read_bytes:";
static const char *write_bytes_str = "write_bytes:";
char line[BUFFER_LEN] = {0}, filename[BUFFER_LEN];
int ps;
int rc;
char *pos, *endpos;
unsigned long long read_bytes, write_bytes;
snprintf(filename, sizeof(filename), PROCFS_TEMPLATE_IO, process->pid);
ps = open(filename, O_RDONLY);
if (ps < 0) {
/* The process must have finished in the last few jiffies!
* Or, the kernel doesn't support I/O accounting.
*/
return;
}
rc = read(ps, line, BUFFER_LEN - 1);
close(ps);
if (rc < 0) { return; }
pos = strstr(line, read_bytes_str);
if (pos == nullptr) {
/* these should not happen (unless the format of the file changes) */
return;
}
pos += strlen(read_bytes_str);
process->read_bytes = strtoull(pos, &endpos, 10);
if (endpos == pos) { return; }
pos = strstr(line, write_bytes_str);
if (pos == nullptr) { return; }
pos += strlen(write_bytes_str);
process->write_bytes = strtoull(pos, &endpos, 10);
if (endpos == pos) { return; }
if (process->previous_read_bytes == ULLONG_MAX) {
process->previous_read_bytes = process->read_bytes;
}
if (process->previous_write_bytes == ULLONG_MAX) {
process->previous_write_bytes = process->write_bytes;
}
/* store the difference of the byte counts */
read_bytes = process->read_bytes - process->previous_read_bytes;
write_bytes = process->write_bytes - process->previous_write_bytes;
/* backup the counts for next time around */
process->previous_read_bytes = process->read_bytes;
process->previous_write_bytes = process->write_bytes;
/* store only the difference here... */
process->read_bytes = read_bytes;
process->write_bytes = write_bytes;
}
#endif /* BUILD_IOSTATS */
/******************************************
* Get process structure for process pid *
******************************************/
/* This function seems to hog all of the CPU time.
* I can't figure out why - it doesn't do much. */
static void calculate_stats(struct process *process) {
/* compute each process cpu usage by reading /proc/<proc#>/stat */
process_parse_stat(process);
#ifdef BUILD_IOSTATS
process_parse_io(process);
#endif /* BUILD_IOSTATS */
/*
* Check name against the exclusion list
*/
/* if (process->counted && exclusion_expression &&
* !regexec(exclusion_expression, process->name, 0, 0, 0))
* process->counted = 0; */
}
/******************************************
* Update process table *
******************************************/
static void update_process_table(void) {
DIR *dir;
struct dirent *entry;
if (!(dir = opendir("/proc"))) { return; }
info.run_procs = 0;
/* Get list of processes from /proc directory */
while ((entry = readdir(dir))) {
pid_t pid;
if (sscanf(entry->d_name, "%d", &pid) > 0) {
/* compute each process cpu usage */
calculate_stats(get_process(pid));
}
}
closedir(dir);
}
void get_top_info(void) {
unsigned long long total = 0;
total = calc_cpu_total(); /* calculate the total of the processor */
update_process_table(); /* update the table with process list */
calc_cpu_each(total); /* and then the percentage for each task */
#ifdef BUILD_IOSTATS
calc_io_each(); /* percentage of I/O for each task */
#endif /* BUILD_IOSTATS */
}
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