mirror of
https://github.com/systemd/systemd-stable.git
synced 2024-10-30 23:21:08 +03:00
1aa1e24848
We never used any of the libsysfs convenience features. Here we replace it completely with 300 lines of code, which are much simpler and a bit faster cause udev(d) does not open any syfs file for a simple event which does not need any parent device information. Signed-off-by: Kay Sievers <kay.sievers@suse.de>
168 lines
4.1 KiB
C
168 lines
4.1 KiB
C
/*
|
|
* udev_utils.c - generic stuff used by udev
|
|
*
|
|
* Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
|
|
*
|
|
* 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 version 2 of the License.
|
|
*
|
|
* 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, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <stddef.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
#include <dirent.h>
|
|
#include <syslog.h>
|
|
#include <sys/utsname.h>
|
|
|
|
#include "udev.h"
|
|
|
|
|
|
int log_priority(const char *priority)
|
|
{
|
|
char *endptr;
|
|
int prio;
|
|
|
|
prio = strtol(priority, &endptr, 10);
|
|
if (endptr[0] == '\0')
|
|
return prio;
|
|
if (strncasecmp(priority, "err", 3) == 0)
|
|
return LOG_ERR;
|
|
if (strcasecmp(priority, "info") == 0)
|
|
return LOG_INFO;
|
|
if (strcasecmp(priority, "debug") == 0)
|
|
return LOG_DEBUG;
|
|
if (string_is_true(priority))
|
|
return LOG_ERR;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int name_list_add(struct list_head *name_list, const char *name, int sort)
|
|
{
|
|
struct name_entry *loop_name;
|
|
struct name_entry *new_name;
|
|
|
|
list_for_each_entry(loop_name, name_list, node) {
|
|
/* avoid doubles */
|
|
if (strcmp(loop_name->name, name) == 0) {
|
|
dbg("'%s' is already in the list", name);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (sort)
|
|
list_for_each_entry(loop_name, name_list, node) {
|
|
if (sort && strcmp(loop_name->name, name) > 0)
|
|
break;
|
|
}
|
|
|
|
new_name = malloc(sizeof(struct name_entry));
|
|
if (new_name == NULL) {
|
|
dbg("error malloc");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
strlcpy(new_name->name, name, sizeof(new_name->name));
|
|
dbg("adding '%s'", new_name->name);
|
|
list_add_tail(&new_name->node, &loop_name->node);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int name_list_key_add(struct list_head *name_list, const char *key, const char *value)
|
|
{
|
|
struct name_entry *loop_name;
|
|
struct name_entry *new_name;
|
|
|
|
list_for_each_entry(loop_name, name_list, node) {
|
|
if (strncmp(loop_name->name, key, strlen(key)) == 0) {
|
|
dbg("key already present '%s', replace it", loop_name->name);
|
|
snprintf(loop_name->name, sizeof(loop_name->name), "%s=%s", key, value);
|
|
loop_name->name[sizeof(loop_name->name)-1] = '\0';
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
new_name = malloc(sizeof(struct name_entry));
|
|
if (new_name == NULL) {
|
|
dbg("error malloc");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
snprintf(new_name->name, sizeof(new_name->name), "%s=%s", key, value);
|
|
new_name->name[sizeof(new_name->name)-1] = '\0';
|
|
dbg("adding '%s'", new_name->name);
|
|
list_add_tail(&new_name->node, &loop_name->node);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void name_list_cleanup(struct list_head *name_list)
|
|
{
|
|
struct name_entry *name_loop;
|
|
struct name_entry *temp_loop;
|
|
|
|
list_for_each_entry_safe(name_loop, temp_loop, name_list, node) {
|
|
list_del(&name_loop->node);
|
|
free(name_loop);
|
|
}
|
|
}
|
|
|
|
/* calls function for every file found in specified directory */
|
|
int add_matching_files(struct list_head *name_list, const char *dirname, const char *suffix)
|
|
{
|
|
struct dirent *ent;
|
|
DIR *dir;
|
|
char *ext;
|
|
char filename[PATH_SIZE];
|
|
|
|
dbg("open directory '%s'", dirname);
|
|
dir = opendir(dirname);
|
|
if (dir == NULL) {
|
|
err("unable to open '%s': %s", dirname, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
while (1) {
|
|
ent = readdir(dir);
|
|
if (ent == NULL || ent->d_name[0] == '\0')
|
|
break;
|
|
|
|
if ((ent->d_name[0] == '.') || (ent->d_name[0] == COMMENT_CHARACTER))
|
|
continue;
|
|
|
|
/* look for file matching with specified suffix */
|
|
ext = strrchr(ent->d_name, '.');
|
|
if (ext == NULL)
|
|
continue;
|
|
|
|
if (strcmp(ext, suffix) != 0)
|
|
continue;
|
|
|
|
dbg("put file '%s/%s' in list", dirname, ent->d_name);
|
|
|
|
snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
|
|
filename[sizeof(filename)-1] = '\0';
|
|
name_list_add(name_list, filename, 1);
|
|
}
|
|
|
|
closedir(dir);
|
|
return 0;
|
|
}
|