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conky/src/smapi.cc

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/*
*
* smapi.c: conky support for IBM Thinkpad smapi
*
* Copyright (C) 2007 Phil Sutter <Phil@nwl.cc>
*
* This library 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 2 of the License, or
* (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
* USA.
*
*/
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#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "conky.h" /* text_buffer_size, PACKAGE_NAME, maybe more */
#include "logging.h"
#include "temphelper.h"
#define SYS_SMAPI_PATH "/sys/devices/platform/smapi"
static int smapi_read_int(const char *path) {
FILE *fp;
int i = 0;
if ((fp = fopen(path, "r"))) {
if (fscanf(fp, "%i\n", &i) < 0) perror("fscanf()");
fclose(fp);
}
return i;
}
static int smapi_bat_installed_internal(int idx) {
char path[128];
struct stat sb;
int ret = 0;
snprintf(path, 127, SYS_SMAPI_PATH "/BAT%i", idx);
if (!stat(path, &sb) && (sb.st_mode & S_IFMT) == S_IFDIR) {
snprintf(path, 127, SYS_SMAPI_PATH "/BAT%i/installed", idx);
ret = (smapi_read_int(path) == 1) ? 1 : 0;
}
return ret;
}
static char *smapi_read_str(const char *path) {
FILE *fp;
char str[256] = "failed";
if ((fp = fopen(path, "r")) != nullptr) {
if (fscanf(fp, "%255s\n", str) < 0) perror("fscanf()");
fclose(fp);
}
return strndup(str, text_buffer_size.get(*state));
}
static char *smapi_get_str(const char *fname) {
char path[128];
if (snprintf(path, 127, SYS_SMAPI_PATH "/%s", fname) < 0) return nullptr;
return smapi_read_str(path);
}
static char *smapi_get_bat_str(int idx, const char *fname) {
char path[128];
if (snprintf(path, 127, SYS_SMAPI_PATH "/BAT%i/%s", idx, fname) < 0)
return nullptr;
return smapi_read_str(path);
}
static int smapi_get_bat_int(int idx, const char *fname) {
char path[128];
if (snprintf(path, 127, SYS_SMAPI_PATH "/BAT%i/%s", idx, fname) < 0) return 0;
return smapi_read_int(path);
}
static char *smapi_get_bat_val(const char *args) {
char fname[128];
int idx, cnt;
if (sscanf(args, "%i %n", &idx, &cnt) <= 0 ||
snprintf(fname, 127, "%s", (args + cnt)) < 0) {
NORM_ERR("smapi: wrong arguments, should be 'bat,<int>,<str>'");
return nullptr;
}
if (!smapi_bat_installed_internal(idx)) return nullptr;
return smapi_get_bat_str(idx, fname);
}
static char *smapi_get_val(const char *args) {
char str[128];
if (!args || sscanf(args, "%127s", str) <= 0) return nullptr;
if (!strcmp(str, "bat")) return smapi_get_bat_val(args + 4);
return smapi_get_str(str);
}
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void print_smapi(struct text_object *obj, char *p, unsigned int p_max_size) {
char *s;
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if (!obj->data.s) return;
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s = smapi_get_val(obj->data.s);
snprintf(p, p_max_size, "%s", s);
free(s);
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}
uint8_t smapi_bat_percentage(struct text_object *obj) {
int idx, val = 0;
if (obj->data.s && sscanf(obj->data.s, "%i", &idx) == 1) {
val = smapi_bat_installed_internal(idx)
? smapi_get_bat_int(idx, "remaining_percent")
: 0;
} else
NORM_ERR("argument to smapi_bat_perc must be an integer");
return val;
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}
void print_smapi_bat_temp(struct text_object *obj, char *p,
unsigned int p_max_size) {
int idx, val;
if (obj->data.s && sscanf(obj->data.s, "%i", &idx) == 1) {
val = smapi_bat_installed_internal(idx)
? smapi_get_bat_int(idx, "temperature")
: 0;
/* temperature is in milli degree celsius */
temp_print(p, p_max_size, val / 1000, TEMP_CELSIUS, 1);
} else
NORM_ERR("argument to smapi_bat_temp must be an integer");
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}
void print_smapi_bat_power(struct text_object *obj, char *p,
unsigned int p_max_size) {
int idx, val;
if (obj->data.s && sscanf(obj->data.s, "%i", &idx) == 1) {
val = smapi_bat_installed_internal(idx)
? smapi_get_bat_int(idx, "power_now")
: 0;
/* power_now is in mW, set to W with one digit precision */
snprintf(p, p_max_size, "%.1f", ((double)val / 1000));
} else
NORM_ERR("argument to smapi_bat_power must be an integer");
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}
double smapi_bat_barval(struct text_object *obj) {
if (obj->data.i >= 0 && smapi_bat_installed_internal(obj->data.i))
return smapi_get_bat_int(obj->data.i, "remaining_percent");
return 0;
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}
int smapi_bat_installed(struct text_object *obj) {
int idx;
if (obj->data.s && sscanf(obj->data.s, "%i", &idx) == 1) {
if (!smapi_bat_installed_internal(idx)) { return 0; }
} else
NORM_ERR("argument to if_smapi_bat_installed must be an integer");
return 1;
}