X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev_utils.c;h=00b67dadc6fa3ff0a70b97df098a1cbbe2ad64d3;hp=581ba9e80afb0972a31b38107e216883b95fb97b;hb=05b9640022d25a75923cc7809409914491a5f9da;hpb=df4e89bfa61b6aaea41619842aa9032dd1af072e diff --git a/udev_utils.c b/udev_utils.c index 581ba9e80..00b67dadc 100644 --- a/udev_utils.c +++ b/udev_utils.c @@ -1,6 +1,4 @@ /* - * udev_utils.c - generic stuff used by udev - * * Copyright (C) 2004-2005 Kay Sievers * * This program is free software; you can redistribute it and/or modify it @@ -14,7 +12,7 @@ * * 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. + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * */ @@ -28,13 +26,12 @@ #include #include #include +#include +#include +#include #include -#include "udev_libc_wrapper.h" #include "udev.h" -#include "logging.h" -#include "udev_utils.h" -#include "list.h" int log_priority(const char *priority) @@ -57,72 +54,88 @@ int log_priority(const char *priority) return 0; } -int name_list_add(struct list_head *name_list, const char *name, int sort) +struct name_entry *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; + 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(loop_name, name_list, node) { - if (sort && strcmp(loop_name->name, name) > 0) + list_for_each_entry(name_loop, name_list, node) { + if (strcmp(name_loop->name, name) > 0) break; } - new_name = malloc(sizeof(struct name_entry)); - if (new_name == NULL) { - dbg("error malloc"); - return -ENOMEM; - } + name_new = malloc(sizeof(struct name_entry)); + if (name_new == NULL) + return NULL; - strlcpy(new_name->name, name, sizeof(new_name->name)); - dbg("adding '%s'", new_name->name); - list_add_tail(&new_name->node, &loop_name->node); + 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 0; + return name_new; } -int name_list_key_add(struct list_head *name_list, const char *key, const char *value) +struct name_entry *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; + 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; } } - new_name = malloc(sizeof(struct name_entry)); - if (new_name == NULL) { - dbg("error malloc"); - return -ENOMEM; - } + name_new = malloc(sizeof(struct name_entry)); + if (name_new == NULL) + return NULL; - 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); + 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 0; + 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 *temp_loop; + struct name_entry *name_tmp; - list_for_each_entry_safe(name_loop, temp_loop, name_list, node) { + list_for_each_entry_safe(name_loop, name_tmp, name_list, node) { list_del(&name_loop->node); free(name_loop); } @@ -133,13 +146,12 @@ int add_matching_files(struct list_head *name_list, const char *dirname, const c { struct dirent *ent; DIR *dir; - char *ext; char filename[PATH_SIZE]; - dbg("open directory '%s'", dirname); + dbg("open directory '%s'\n", dirname); dir = opendir(dirname); if (dir == NULL) { - err("unable to open '%s': %s", dirname, strerror(errno)); + err("unable to open '%s': %s\n", dirname, strerror(errno)); return -1; } @@ -152,14 +164,16 @@ int add_matching_files(struct list_head *name_list, const char *dirname, const c 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); + 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'; @@ -169,3 +183,40 @@ int add_matching_files(struct list_head *name_list, const char *dirname, const c 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; +} +