mirror of
https://github.com/systemd/systemd.git
synced 2024-12-25 01:34:28 +03:00
659353f5a9
strerror() is not threadsafe. It uses a buffer to build messages of the form "Unknown error 387689". syslog() provides a %m format which is equivalent to strerror(errno). As a GNU extension, this is also accepted by printf and friends. At least in the current implementation, it is correctly threadsafe. Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
204 lines
5.2 KiB
C
204 lines
5.2 KiB
C
/*
|
|
* Copyright (C) 2004-2008 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, either version 2 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 <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <stddef.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
#include <dirent.h>
|
|
#include <syslog.h>
|
|
#include <pwd.h>
|
|
#include <grp.h>
|
|
#include <sys/types.h>
|
|
#include <sys/utsname.h>
|
|
|
|
#include "udev.h"
|
|
|
|
struct name_entry *name_list_add(struct udev *udev, struct list_head *name_list, const char *name, int sort)
|
|
{
|
|
struct name_entry *name_loop;
|
|
struct name_entry *name_new;
|
|
|
|
/* avoid duplicate entries */
|
|
list_for_each_entry(name_loop, name_list, node) {
|
|
if (strcmp(name_loop->name, name) == 0) {
|
|
dbg(udev, "'%s' is already in the list\n", name);
|
|
return name_loop;
|
|
}
|
|
}
|
|
|
|
if (sort)
|
|
list_for_each_entry(name_loop, name_list, node) {
|
|
if (strcmp(name_loop->name, name) > 0)
|
|
break;
|
|
}
|
|
|
|
name_new = malloc(sizeof(struct name_entry));
|
|
if (name_new == NULL)
|
|
return NULL;
|
|
memset(name_new, 0x00, sizeof(struct name_entry));
|
|
util_strlcpy(name_new->name, name, sizeof(name_new->name));
|
|
dbg(udev, "adding '%s'\n", name_new->name);
|
|
list_add_tail(&name_new->node, &name_loop->node);
|
|
|
|
return name_new;
|
|
}
|
|
|
|
struct name_entry *name_list_key_add(struct udev *udev, struct list_head *name_list, const char *key, const char *value)
|
|
{
|
|
struct name_entry *name_loop;
|
|
struct name_entry *name_new;
|
|
size_t keylen = strlen(key);
|
|
|
|
list_for_each_entry(name_loop, name_list, node) {
|
|
if (strncmp(name_loop->name, key, keylen) != 0)
|
|
continue;
|
|
if (name_loop->name[keylen] != '=')
|
|
continue;
|
|
dbg(udev, "key already present '%s', replace it\n", name_loop->name);
|
|
snprintf(name_loop->name, sizeof(name_loop->name), "%s=%s", key, value);
|
|
name_loop->name[sizeof(name_loop->name)-1] = '\0';
|
|
return name_loop;
|
|
}
|
|
|
|
name_new = malloc(sizeof(struct name_entry));
|
|
if (name_new == NULL)
|
|
return NULL;
|
|
memset(name_new, 0x00, sizeof(struct name_entry));
|
|
snprintf(name_new->name, sizeof(name_new->name), "%s=%s", key, value);
|
|
name_new->name[sizeof(name_new->name)-1] = '\0';
|
|
dbg(udev, "adding '%s'\n", name_new->name);
|
|
list_add_tail(&name_new->node, &name_loop->node);
|
|
|
|
return name_new;
|
|
}
|
|
|
|
int name_list_key_remove(struct udev *udev, struct list_head *name_list, const char *key)
|
|
{
|
|
struct name_entry *name_loop;
|
|
struct name_entry *name_tmp;
|
|
size_t keylen = strlen(key);
|
|
int retval = 0;
|
|
|
|
list_for_each_entry_safe(name_loop, name_tmp, name_list, node) {
|
|
if (strncmp(name_loop->name, key, keylen) != 0)
|
|
continue;
|
|
if (name_loop->name[keylen] != '=')
|
|
continue;
|
|
list_del(&name_loop->node);
|
|
free(name_loop);
|
|
retval = 1;
|
|
break;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
void name_list_cleanup(struct udev *udev, struct list_head *name_list)
|
|
{
|
|
struct name_entry *name_loop;
|
|
struct name_entry *name_tmp;
|
|
|
|
list_for_each_entry_safe(name_loop, name_tmp, 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 udev *udev, struct list_head *name_list, const char *dirname, const char *suffix)
|
|
{
|
|
struct dirent *ent;
|
|
DIR *dir;
|
|
char filename[UTIL_PATH_SIZE];
|
|
|
|
dbg(udev, "open directory '%s'\n", dirname);
|
|
dir = opendir(dirname);
|
|
if (dir == NULL) {
|
|
err(udev, "unable to open '%s': %m\n", dirname);
|
|
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] == '#'))
|
|
continue;
|
|
|
|
/* look for file matching with specified suffix */
|
|
if (suffix != NULL) {
|
|
const char *ext;
|
|
|
|
ext = strrchr(ent->d_name, '.');
|
|
if (ext == NULL)
|
|
continue;
|
|
if (strcmp(ext, suffix) != 0)
|
|
continue;
|
|
}
|
|
dbg(udev, "put file '%s/%s' into list\n", dirname, ent->d_name);
|
|
|
|
snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
|
|
filename[sizeof(filename)-1] = '\0';
|
|
name_list_add(udev, name_list, filename, 1);
|
|
}
|
|
|
|
closedir(dir);
|
|
return 0;
|
|
}
|
|
|
|
uid_t lookup_user(struct udev *udev, const char *user)
|
|
{
|
|
struct passwd *pw;
|
|
uid_t uid = 0;
|
|
|
|
errno = 0;
|
|
pw = getpwnam(user);
|
|
if (pw == NULL) {
|
|
if (errno == 0 || errno == ENOENT || errno == ESRCH)
|
|
err(udev, "specified user '%s' unknown\n", user);
|
|
else
|
|
err(udev, "error resolving user '%s': %m\n", user);
|
|
} else
|
|
uid = pw->pw_uid;
|
|
|
|
return uid;
|
|
}
|
|
|
|
extern gid_t lookup_group(struct udev *udev, const char *group)
|
|
{
|
|
struct group *gr;
|
|
gid_t gid = 0;
|
|
|
|
errno = 0;
|
|
gr = getgrnam(group);
|
|
if (gr == NULL) {
|
|
if (errno == 0 || errno == ENOENT || errno == ESRCH)
|
|
err(udev, "specified group '%s' unknown\n", group);
|
|
else
|
|
err(udev, "error resolving group '%s': %m\n", group);
|
|
} else
|
|
gid = gr->gr_gid;
|
|
|
|
return gid;
|
|
}
|
|
|