diff options
Diffstat (limited to 'udev/udev_utils.c')
| -rw-r--r-- | udev/udev_utils.c | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/udev/udev_utils.c b/udev/udev_utils.c new file mode 100644 index 0000000000..00b67dadc6 --- /dev/null +++ b/udev/udev_utils.c @@ -0,0 +1,222 @@ +/* + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 <pwd.h> +#include <grp.h> +#include <sys/types.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; +} + +struct name_entry *name_list_add(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("'%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; + + strlcpy(name_new->name, name, sizeof(name_new->name)); + dbg("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 list_head *name_list, const char *key, const char *value) +{ + struct name_entry *name_loop; + struct name_entry *name_new; + + list_for_each_entry(name_loop, name_list, node) { + if (strncmp(name_loop->name, key, strlen(key)) == 0) { + dbg("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; + + snprintf(name_new->name, sizeof(name_new->name), "%s=%s", key, value); + name_new->name[sizeof(name_new->name)-1] = '\0'; + dbg("adding '%s'\n", name_new->name); + list_add_tail(&name_new->node, &name_loop->node); + + return name_new; +} + +int name_list_key_remove(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 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 list_head *name_list, const char *dirname, const char *suffix) +{ + struct dirent *ent; + DIR *dir; + char filename[PATH_SIZE]; + + dbg("open directory '%s'\n", dirname); + dir = opendir(dirname); + if (dir == NULL) { + err("unable to open '%s': %s\n", 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 */ + if (suffix != NULL) { + const char *ext; + + ext = strrchr(ent->d_name, '.'); + if (ext == NULL) + continue; + if (strcmp(ext, suffix) != 0) + continue; + } + dbg("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(name_list, filename, 1); + } + + closedir(dir); + return 0; +} + +uid_t lookup_user(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("specified user '%s' unknown\n", user); + else + err("error resolving user '%s': %s\n", user, strerror(errno)); + } else + uid = pw->pw_uid; + + return uid; +} + +extern gid_t lookup_group(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("specified group '%s' unknown\n", group); + else + err("error resolving group '%s': %s\n", group, strerror(errno)); + } else + gid = gr->gr_gid; + + return gid; +} + |