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conky/src/fs.c

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/* Conky, a system monitor, based on torsmo
*
* Any original torsmo code is licensed under the BSD license
*
* All code written since the fork of torsmo is licensed under the GPL
*
* Please see COPYING for details
*
* Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
* Copyright (c) 2005-2007 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/>.
*
* $Id$ */
#include "conky.h"
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <fcntl.h>
/* linux */
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
/* freebsd && netbsd */
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#define MAX_FS_STATS 64
static struct fs_stat fs_stats_[MAX_FS_STATS];
struct fs_stat *fs_stats = fs_stats_;
static void update_fs_stat(struct fs_stat *fs);
void update_fs_stats()
{
unsigned i;
for (i = 0; i < MAX_FS_STATS; ++i) {
if (fs_stats[i].path) {
update_fs_stat(&fs_stats[i]);
}
}
}
void clear_fs_stats()
{
unsigned i;
for (i = 0; i < MAX_FS_STATS; ++i) {
if (fs_stats[i].path) {
free(fs_stats[i].path);
fs_stats[i].path = NULL;
}
}
}
struct fs_stat *prepare_fs_stat(const char *s)
{
struct fs_stat *new = 0;
unsigned i;
/* lookup existing or get new */
for (i = 0; i < MAX_FS_STATS; ++i) {
if (fs_stats[i].path) {
if (strcmp(fs_stats[i].path, s) == 0) {
return &fs_stats[i];
}
} else {
new = &fs_stats[i];
}
}
/* new path */
if (!new) {
ERR("too many fs stats");
return 0;
}
new->path = strdup(s);
update_fs_stat(new);
return new;
}
static void update_fs_stat(struct fs_stat *fs)
{
struct statfs s;
if (statfs(fs->path, &s) == 0) {
fs->size = (long long) s.f_blocks * s.f_bsize;
/* bfree (root) or bavail (non-roots) ? */
fs->avail = (long long) s.f_bavail * s.f_bsize;
fs->free = (long long) s.f_bfree * s.f_bsize;
} else {
fs->size = 0;
fs->avail = 0;
fs->free = 0;
ERR("statfs '%s': %s", fs->path, strerror(errno));
}
}