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=145f02b5e120cf3de2fe72d5e17c7565ed445b55;hb=661a0bea80d129d5df708e36dbaed745c9d8392e;hpb=915a12adc2ea28dc2391788c66b829caefefcfb4 diff --git a/udev_utils.c b/udev_utils.c index 145f02b5e..00b67dadc 100644 --- a/udev_utils.c +++ b/udev_utils.c @@ -1,7 +1,5 @@ /* - * udev_lib - generic stuff used by udev - * - * Copyright (C) 2004 Kay Sievers + * Copyright (C) 2004-2005 Kay Sievers * * 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 @@ -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. * */ @@ -27,292 +25,133 @@ #include #include #include -#include -#include +#include +#include +#include +#include #include #include "udev.h" -#include "logging.h" -#include "udev_utils.h" -#include "list.h" -int udev_init_device(struct udevice *udev, const char* devpath, const char *subsystem) +int log_priority(const char *priority) { - char *pos; - - memset(udev, 0x00, sizeof(struct udevice)); - INIT_LIST_HEAD(&udev->symlink_list); - - if (subsystem) - strfieldcpy(udev->subsystem, subsystem); - - if (devpath) { - strfieldcpy(udev->devpath, devpath); - no_trailing_slash(udev->devpath); - - if (strncmp(udev->devpath, "/block/", 7) == 0) - udev->type = BLOCK; - else if (strncmp(udev->devpath, "/class/net/", 11) == 0) - udev->type = NET; - else if (strncmp(udev->devpath, "/class/", 7) == 0) - udev->type = CLASS; - else if (strncmp(udev->devpath, "/devices/", 9) == 0) - udev->type = PHYSDEV; - - /* get kernel name */ - pos = strrchr(udev->devpath, '/'); - if (pos) { - strfieldcpy(udev->kernel_name, &pos[1]); - dbg("kernel_name='%s'", udev->kernel_name); - - /* Some block devices have '!' in their name, change that to '/' */ - pos = udev->kernel_name; - while (pos[0] != '\0') { - if (pos[0] == '!') - pos[0] = '/'; - pos++; - } - - /* get kernel number */ - pos = &udev->kernel_name[strlen(udev->kernel_name)]; - while (isdigit(pos[-1])) - pos--; - strfieldcpy(udev->kernel_number, pos); - dbg("kernel_number='%s'", udev->kernel_number); - } - } - - udev->mode = 0660; - strcpy(udev->owner, "0"); - strcpy(udev->group, "0"); + 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; } -void udev_cleanup_device(struct udevice *udev) +struct name_entry *name_list_add(struct list_head *name_list, const char *name, int sort) { struct name_entry *name_loop; - struct name_entry *temp_loop; + struct name_entry *name_new; - list_for_each_entry_safe(name_loop, temp_loop, &udev->symlink_list, node) { - list_del(&name_loop->node); - free(name_loop); - } -} - -int kernel_release_satisfactory(unsigned int version, unsigned int patchlevel, unsigned int sublevel) -{ - static unsigned int kversion = 0; - static unsigned int kpatchlevel; - static unsigned int ksublevel; - - if (kversion == 0) { - struct utsname uts; - if (uname(&uts) != 0) - return -1; - - if (sscanf (uts.release, "%u.%u.%u", &kversion, &kpatchlevel, &ksublevel) != 3) { - kversion = 0; - return -1; + /* 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 (kversion >= version && kpatchlevel >= patchlevel && ksublevel >= sublevel) - return 1; - else - return 0; -} - -int create_path(const char *path) -{ - char p[NAME_SIZE]; - char *pos; - struct stat stats; - - strcpy (p, path); - pos = strrchr(p, '/'); - if (pos == p || pos == NULL) - return 0; - - while (pos[-1] == '/') - pos--; - - pos[0] = '\0'; - - dbg("stat '%s'\n", p); - if (stat (p, &stats) == 0 && (stats.st_mode & S_IFMT) == S_IFDIR) - return 0; - - if (create_path (p) != 0) - return -1; - - dbg("mkdir '%s'\n", p); - return mkdir(p, 0755); -} - -/* Reset permissions on the device node, before unlinking it to make sure, - * that permisions of possible hard links will be removed too. - */ -int unlink_secure(const char *filename) -{ - int retval; - - retval = chown(filename, 0, 0); - if (retval) - dbg("chown(%s, 0, 0) failed with error '%s'", filename, strerror(errno)); - - retval = chmod(filename, 0000); - if (retval) - dbg("chmod(%s, 0000) failed with error '%s'", filename, strerror(errno)); - - retval = unlink(filename); - if (errno == ENOENT) - retval = 0; + if (sort) + list_for_each_entry(name_loop, name_list, node) { + if (strcmp(name_loop->name, name) > 0) + break; + } - if (retval) - dbg("unlink(%s) failed with error '%s'", filename, strerror(errno)); + name_new = malloc(sizeof(struct name_entry)); + if (name_new == NULL) + return NULL; - return retval; -} + 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); -int parse_get_pair(char **orig_string, char **left, char **right) -{ - char *temp; - char *string = *orig_string; - - if (!string) - return -ENODEV; - - /* eat any whitespace */ - while (isspace(*string) || *string == ',') - ++string; - - /* split based on '=' */ - temp = strsep(&string, "="); - *left = temp; - if (!string) - return -ENODEV; - - /* take the right side and strip off the '"' */ - while (isspace(*string)) - ++string; - if (*string == '"') - ++string; - else - return -ENODEV; - - temp = strsep(&string, "\""); - if (!string || *temp == '\0') - return -ENODEV; - *right = temp; - *orig_string = string; - - return 0; + return name_new; } -int file_map(const char *filename, char **buf, size_t *bufsize) +struct name_entry *name_list_key_add(struct list_head *name_list, const char *key, const char *value) { - struct stat stats; - int fd; - - fd = open(filename, O_RDONLY); - if (fd < 0) { - return -1; - } - - if (fstat(fd, &stats) < 0) { - close(fd); - return -1; + 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; + } } - *buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0); - if (*buf == MAP_FAILED) { - close(fd); - return -1; - } - *bufsize = stats.st_size; + name_new = malloc(sizeof(struct name_entry)); + if (name_new == NULL) + return NULL; - close(fd); + 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; } -void file_unmap(char *buf, size_t bufsize) +int name_list_key_remove(struct list_head *name_list, const char *key) { - munmap(buf, bufsize); -} - -/* return number of chars until the next newline, skip escaped newline */ -size_t buf_get_line(const char *buf, size_t buflen, size_t cur) -{ - int escape = 0; - size_t count; - - for (count = cur; count < buflen; count++) { - if (!escape && buf[count] == '\n') - break; + struct name_entry *name_loop; + struct name_entry *name_tmp; + size_t keylen = strlen(key); + int retval = 0; - if (buf[count] == '\\') - escape = 1; - else - escape = 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 count - cur; -} - -void no_trailing_slash(char *path) -{ - size_t len; - - len = strlen(path); - while (len > 0 && path[len-1] == '/') - path[--len] = '\0'; + return retval; } -int name_list_add(struct list_head *name_list, const char *name, int sort) +void name_list_cleanup(struct list_head *name_list) { - 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 && strcmp(loop_name->name, name) > 0) - break; - } + struct name_entry *name_loop; + struct name_entry *name_tmp; - new_name = malloc(sizeof(struct name_entry)); - if (new_name == NULL) { - dbg("error malloc"); - return -ENOMEM; + list_for_each_entry_safe(name_loop, name_tmp, name_list, node) { + list_del(&name_loop->node); + free(name_loop); } - - strfieldcpy(new_name->name, name); - list_add_tail(&new_name->node, &loop_name->node); - - return 0; } /* calls function for every file found in specified directory */ -int call_foreach_file(int (*handler_function)(struct udevice *udev, const char *string), - struct udevice *udev, const char *dirname, const char *suffix) +int add_matching_files(struct list_head *name_list, const char *dirname, const char *suffix) { struct dirent *ent; DIR *dir; - char *ext; - struct name_entry *loop_file; - struct name_entry *tmp_file; - LIST_HEAD(file_list); + char filename[PATH_SIZE]; - dbg("open directory '%s'", dirname); + dbg("open directory '%s'\n", dirname); dir = opendir(dirname); if (dir == NULL) { - dbg("unable to open '%s'", dirname); + err("unable to open '%s': %s\n", dirname, strerror(errno)); return -1; } @@ -324,31 +163,60 @@ int call_foreach_file(int (*handler_function)(struct udevice *udev, const char * if ((ent->d_name[0] == '.') || (ent->d_name[0] == COMMENT_CHARACTER)) continue; - /* look for file with specified suffix */ - ext = strrchr(ent->d_name, '.'); - if (ext == NULL) - continue; + /* look for file matching with specified suffix */ + if (suffix != NULL) { + const char *ext; - if (strcmp(ext, suffix) != 0) - continue; + 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); - dbg("put file '%s/%s' in list", dirname, ent->d_name); - name_list_add(&file_list, ent->d_name, 1); + snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name); + filename[sizeof(filename)-1] = '\0'; + name_list_add(name_list, filename, 1); } - /* call function for every file in the list */ - list_for_each_entry_safe(loop_file, tmp_file, &file_list, node) { - char filename[NAME_SIZE]; + closedir(dir); + return 0; +} - snprintf(filename, NAME_SIZE, "%s/%s", dirname, loop_file->name); - filename[NAME_SIZE-1] = '\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; - handler_function(udev, filename); + return uid; +} - list_del(&loop_file->node); - free(loop_file); - } +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; - closedir(dir); - return 0; + return gid; } +