diff options
Diffstat (limited to 'udev/lib/libudev-device.c')
| -rw-r--r-- | udev/lib/libudev-device.c | 1249 |
1 files changed, 0 insertions, 1249 deletions
diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c deleted file mode 100644 index ea54badde4..0000000000 --- a/udev/lib/libudev-device.c +++ /dev/null @@ -1,1249 +0,0 @@ -/* - * libudev - interface to udev device information - * - * Copyright (C) 2008-2009 Kay Sievers <kay.sievers@vrfy.org> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <stddef.h> -#include <unistd.h> -#include <errno.h> -#include <string.h> -#include <dirent.h> -#include <fcntl.h> -#include <ctype.h> -#include <sys/stat.h> - -#include "libudev.h" -#include "libudev-private.h" - -struct udev_device { - struct udev *udev; - struct udev_device *parent_device; - char *syspath; - const char *devpath; - char *sysname; - const char *sysnum; - char *devnode; - char *subsystem; - char *devtype; - char *driver; - char *action; - char *devpath_old; - char *knodename; - char **envp; - char *monitor_buf; - size_t monitor_buf_len; - struct udev_list_node devlinks_list; - struct udev_list_node properties_list; - struct udev_list_node sysattr_list; - unsigned long long int seqnum; - int event_timeout; - int timeout; - int num_fake_partitions; - int devlink_priority; - int refcount; - dev_t devnum; - int watch_handle; - unsigned int parent_set:1; - unsigned int subsystem_set:1; - unsigned int devtype_set:1; - unsigned int devlinks_uptodate:1; - unsigned int envp_uptodate:1; - unsigned int driver_set:1; - unsigned int info_loaded:1; - unsigned int ignore_remove:1; -}; - -static size_t devpath_to_db_path(struct udev *udev, const char *devpath, char *filename, size_t len) -{ - char *s; - size_t l; - - s = filename; - l = util_strpcpyl(&s, len, udev_get_dev_path(udev), "/.udev/db/", NULL); - return util_path_encode(devpath, s, l); -} - -int udev_device_read_db(struct udev_device *udev_device) -{ - struct stat stats; - char filename[UTIL_PATH_SIZE]; - char line[UTIL_LINE_SIZE]; - FILE *f; - - devpath_to_db_path(udev_device->udev, udev_device->devpath, filename, sizeof(filename)); - - if (lstat(filename, &stats) != 0) { - dbg(udev_device->udev, "no db file to read %s: %m\n", filename); - return -1; - } - if ((stats.st_mode & S_IFMT) == S_IFLNK) { - char target[UTIL_PATH_SIZE]; - char devnode[UTIL_PATH_SIZE]; - int target_len; - char *next; - - target_len = readlink(filename, target, sizeof(target)); - if (target_len > 0) - target[target_len] = '\0'; - else { - dbg(udev_device->udev, "error reading db link %s: %m\n", filename); - return -1; - } - - next = strchr(target, ' '); - if (next != NULL) { - next[0] = '\0'; - next = &next[1]; - } - util_strscpyl(devnode, sizeof(devnode), udev_get_dev_path(udev_device->udev), "/", target, NULL); - udev_device_set_devnode(udev_device, devnode); - while (next != NULL) { - char devlink[UTIL_PATH_SIZE]; - const char *lnk; - - lnk = next; - next = strchr(next, ' '); - if (next != NULL) { - next[0] = '\0'; - next = &next[1]; - } - util_strscpyl(devlink, sizeof(devlink), udev_get_dev_path(udev_device->udev), "/", lnk, NULL); - udev_device_add_devlink(udev_device, devlink); - } - info(udev_device->udev, "device %p filled with db symlink data '%s'\n", udev_device, udev_device->devnode); - return 0; - } - - f = fopen(filename, "r"); - if (f == NULL) { - dbg(udev_device->udev, "error reading db file %s: %m\n", filename); - return -1; - } - while (fgets(line, sizeof(line), f)) { - ssize_t len; - const char *val; - - len = strlen(line); - if (len < 4) - break; - line[len-1] = '\0'; - val = &line[2]; - switch(line[0]) { - case 'N': - util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL); - udev_device_set_devnode(udev_device, filename); - break; - case 'S': - util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL); - udev_device_add_devlink(udev_device, filename); - break; - case 'L': - udev_device_set_devlink_priority(udev_device, atoi(val)); - break; - case 'T': - udev_device_set_event_timeout(udev_device, atoi(val)); - break; - case 'A': - udev_device_set_num_fake_partitions(udev_device, atoi(val)); - break; - case 'R': - udev_device_set_ignore_remove(udev_device, atoi(val)); - break; - case 'E': - udev_device_add_property_from_string(udev_device, val); - break; - case 'W': - udev_device_set_watch_handle(udev_device, atoi(val)); - break; - } - } - fclose(f); - - info(udev_device->udev, "device %p filled with db file data\n", udev_device); - return 0; -} - -int udev_device_read_uevent_file(struct udev_device *udev_device) -{ - char filename[UTIL_PATH_SIZE]; - FILE *f; - char line[UTIL_LINE_SIZE]; - int maj = 0; - int min = 0; - - util_strscpyl(filename, sizeof(filename), udev_device->syspath, "/uevent", NULL); - f = fopen(filename, "r"); - if (f == NULL) - return -1; - - while (fgets(line, sizeof(line), f)) { - char *pos; - - pos = strchr(line, '\n'); - if (pos == NULL) - continue; - pos[0] = '\0'; - - if (strncmp(line, "DEVTYPE=", 8) == 0) - udev_device_set_devtype(udev_device, &line[8]); - else if (strncmp(line, "MAJOR=", 6) == 0) - maj = strtoull(&line[6], NULL, 10); - else if (strncmp(line, "MINOR=", 6) == 0) - min = strtoull(&line[6], NULL, 10); - else if (strncmp(line, "DEVNAME=", 8) == 0) - udev_device_set_knodename(udev_device, &line[8]); - - udev_device_add_property_from_string(udev_device, line); - } - - udev_device->devnum = makedev(maj, min); - - fclose(f); - return 0; -} - -static void device_load_info(struct udev_device *device) -{ - device->info_loaded = 1; - udev_device_read_uevent_file(device); - udev_device_read_db(device); -} - -void udev_device_set_info_loaded(struct udev_device *device) -{ - device->info_loaded = 1; -} - -struct udev_device *device_new(struct udev *udev) -{ - struct udev_device *udev_device; - struct udev_list_entry *list_entry; - - if (udev == NULL) - return NULL; - - udev_device = calloc(1, sizeof(struct udev_device)); - if (udev_device == NULL) - return NULL; - udev_device->refcount = 1; - udev_device->udev = udev; - udev_list_init(&udev_device->devlinks_list); - udev_list_init(&udev_device->properties_list); - udev_list_init(&udev_device->sysattr_list); - udev_device->event_timeout = -1; - udev_device->watch_handle = -1; - /* copy global properties */ - udev_list_entry_foreach(list_entry, udev_get_properties_list_entry(udev)) - udev_device_add_property(udev_device, - udev_list_entry_get_name(list_entry), - udev_list_entry_get_value(list_entry)); - dbg(udev_device->udev, "udev_device: %p created\n", udev_device); - return udev_device; -} - -/** - * udev_device_new_from_syspath: - * @udev: udev library context - * @syspath: sys device path including sys directory - * - * Create new udev device, and fill in information from the sys - * device and the udev database entry. The sypath is the absolute - * path to the device, including the sys mount point. - * - * The initial refcount is 1, and needs to be decremented to - * release the resources of the udev device. - * - * Returns: a new udev device, or #NULL, if it does not exist - **/ -struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath) -{ - size_t len; - const char *subdir; - char path[UTIL_PATH_SIZE]; - char *pos; - struct stat statbuf; - struct udev_device *udev_device; - - if (udev == NULL) - return NULL; - if (syspath == NULL) - return NULL; - - /* path starts in sys */ - len = strlen(udev_get_sys_path(udev)); - if (strncmp(syspath, udev_get_sys_path(udev), len) != 0) { - info(udev, "not in sys :%s\n", syspath); - return NULL; - } - - /* path is not a root directory */ - subdir = &syspath[len+1]; - pos = strrchr(subdir, '/'); - if (pos == NULL || pos[1] == '\0' || pos < &subdir[2]) { - dbg(udev, "not a subdir :%s\n", syspath); - return NULL; - } - - /* resolve possible symlink to real path */ - util_strscpy(path, sizeof(path), syspath); - util_resolve_sys_link(udev, path, sizeof(path)); - - /* try to resolve the silly block layout if needed */ - if (strncmp(&path[len], "/block/", 7) == 0) { - char block[UTIL_PATH_SIZE]; - char part[UTIL_PATH_SIZE]; - - util_strscpy(block, sizeof(block), path); - pos = strrchr(block, '/'); - if (pos == NULL) - return NULL; - util_strscpy(part, sizeof(part), pos); - pos[0] = '\0'; - if (util_resolve_sys_link(udev, block, sizeof(block)) == 0) - util_strscpyl(path, sizeof(path), block, part, NULL); - } - - /* path exists in sys */ - if (strncmp(&syspath[len], "/devices/", 9) == 0 || - strncmp(&syspath[len], "/class/", 7) == 0 || - strncmp(&syspath[len], "/block/", 7) == 0) { - char file[UTIL_PATH_SIZE]; - - /* all "devices" require a "uevent" file */ - util_strscpyl(file, sizeof(file), path, "/uevent", NULL); - if (stat(file, &statbuf) != 0) { - dbg(udev, "not a device: %s\n", syspath); - return NULL; - } - } else { - /* everything else just needs to be a directory */ - if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) { - dbg(udev, "directory not found: %s\n", syspath); - return NULL; - } - } - - udev_device = device_new(udev); - if (udev_device == NULL) - return NULL; - - udev_device_set_syspath(udev_device, path); - info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device)); - - return udev_device; -} - -struct udev_device *udev_device_new_from_devnum(struct udev *udev, char type, dev_t devnum) -{ - char path[UTIL_PATH_SIZE]; - const char *type_str; - struct udev_enumerate *udev_enumerate; - struct udev_list_entry *list_entry; - struct udev_device *device = NULL; - - if (type == 'b') - type_str = "block"; - else if (type == 'c') - type_str = "char"; - else - return NULL; - - /* /sys/dev/{block,char}/<maj>:<min> link */ - snprintf(path, sizeof(path), "%s/dev/%s/%u:%u", udev_get_sys_path(udev), - type_str, major(devnum), minor(devnum)); - if (util_resolve_sys_link(udev, path, sizeof(path)) == 0) - return udev_device_new_from_syspath(udev, path); - - udev_enumerate = udev_enumerate_new(udev); - if (udev_enumerate == NULL) - return NULL; - - /* fallback to search sys devices for the major/minor */ - if (type == 'b') - udev_enumerate_add_match_subsystem(udev_enumerate, "block"); - else if (type == 'c') - udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block"); - udev_enumerate_scan_devices(udev_enumerate); - udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) { - struct udev_device *device_loop; - - device_loop = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry)); - if (device_loop != NULL) { - if (udev_device_get_devnum(device_loop) == devnum) { - if (type == 'b' && strcmp(udev_device_get_subsystem(device_loop), "block") != 0) - continue; - if (type == 'c' && strcmp(udev_device_get_subsystem(device_loop), "block") == 0) - continue; - device = device_loop; - break; - } - udev_device_unref(device_loop); - } - } - udev_enumerate_unref(udev_enumerate); - return device; -} - -struct udev_device *udev_device_new_from_subsystem_sysname(struct udev *udev, const char *subsystem, const char *sysname) -{ - char path_full[UTIL_PATH_SIZE]; - char *path; - size_t l; - struct stat statbuf; - - path = path_full; - l = util_strpcpyl(&path, sizeof(path_full), udev_get_sys_path(udev), NULL); - - if (strcmp(subsystem, "subsystem") == 0) { - util_strscpyl(path, l, "/subsystem/", sysname, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; - - util_strscpyl(path, l, "/bus/", sysname, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; - - util_strscpyl(path, l, "/class/", sysname, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; - goto out; - } - - if (strcmp(subsystem, "module") == 0) { - util_strscpyl(path, l, "/module/", sysname, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; - goto out; - } - - if (strcmp(subsystem, "drivers") == 0) { - char subsys[UTIL_NAME_SIZE]; - char *driver; - - util_strscpy(subsys, sizeof(subsys), sysname); - driver = strchr(subsys, ':'); - if (driver != NULL) { - driver[0] = '\0'; - driver = &driver[1]; - - util_strscpyl(path, l, "/subsystem/", subsys, "/drivers/", driver, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; - - util_strscpyl(path, l, "/bus/", subsys, "/drivers/", driver, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; - } - goto out; - } - - util_strscpyl(path, l, "/subsystem/", subsystem, "/devices/", sysname, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; - - util_strscpyl(path, l, "/bus/", subsystem, "/devices/", sysname, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; - - util_strscpyl(path, l, "/class/", subsystem, "/", sysname, NULL); - if (stat(path_full, &statbuf) == 0) - goto found; -out: - return NULL; -found: - return udev_device_new_from_syspath(udev, path_full); -} - -static struct udev_device *device_new_from_parent(struct udev_device *udev_device) -{ - struct udev_device *udev_device_parent = NULL; - char path[UTIL_PATH_SIZE]; - const char *subdir; - - /* follow "device" link in deprecated sys layout */ - if (strncmp(udev_device->devpath, "/class/", 7) == 0 || - strncmp(udev_device->devpath, "/block/", 7) == 0) { - util_strscpyl(path, sizeof(path), udev_device->syspath, "/device", NULL); - if (util_resolve_sys_link(udev_device->udev, path, sizeof(path)) == 0) { - udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); - if (udev_device_parent != NULL) - return udev_device_parent; - } - } - - util_strscpy(path, sizeof(path), udev_device->syspath); - subdir = &path[strlen(udev_get_sys_path(udev_device->udev))+1]; - while (1) { - char *pos; - - pos = strrchr(subdir, '/'); - if (pos == NULL || pos < &subdir[2]) - break; - pos[0] = '\0'; - udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path); - if (udev_device_parent != NULL) - return udev_device_parent; - } - return NULL; -} - -struct udev_device *udev_device_get_parent(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - if (!udev_device->parent_set) { - udev_device->parent_set = 1; - udev_device->parent_device = device_new_from_parent(udev_device); - } - if (udev_device->parent_device != NULL) - dbg(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device); - return udev_device->parent_device; -} - -struct udev_device *udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device, const char *subsystem, const char *devtype) -{ - struct udev_device *parent; - - if (subsystem == NULL) - return NULL; - - parent = udev_device_get_parent(udev_device); - while (parent != NULL) { - const char *parent_subsystem; - const char *parent_devtype; - - parent_subsystem = udev_device_get_subsystem(parent); - if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) { - if (devtype == NULL) - break; - parent_devtype = udev_device_get_devtype(parent); - if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0) - break; - } - parent = udev_device_get_parent(parent); - } - return parent; -} - -/** - * udev_device_get_udev: - * @udev_device: udev device - * - * Retrieve the udev library context the device was created with. - * - * Returns: the udev library context - **/ -struct udev *udev_device_get_udev(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - return udev_device->udev; -} - -/** - * udev_device_ref: - * @udev_device: udev device - * - * Take a reference of a udev device. - * - * Returns: the passed udev device - **/ -struct udev_device *udev_device_ref(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - udev_device->refcount++; - return udev_device; -} - -/** - * udev_device_unref: - * @udev_device: udev device - * - * Drop a reference of a udev device. If the refcount reaches zero, - * the resources of the device will be released. - * - **/ -void udev_device_unref(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return; - udev_device->refcount--; - if (udev_device->refcount > 0) - return; - if (udev_device->parent_device != NULL) - udev_device_unref(udev_device->parent_device); - free(udev_device->syspath); - free(udev_device->sysname); - free(udev_device->devnode); - free(udev_device->subsystem); - free(udev_device->devtype); - udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list); - udev_list_cleanup_entries(udev_device->udev, &udev_device->properties_list); - free(udev_device->action); - free(udev_device->driver); - free(udev_device->devpath_old); - free(udev_device->knodename); - udev_list_cleanup_entries(udev_device->udev, &udev_device->sysattr_list); - free(udev_device->envp); - free(udev_device->monitor_buf); - dbg(udev_device->udev, "udev_device: %p released\n", udev_device); - free(udev_device); -} - -/** - * udev_device_get_devpath: - * @udev_device: udev device - * - * Retrieve the kernel devpath value of the udev device. The path - * does not contain the sys mount point, and starts with a '/'. - * - * Returns: the devpath of the udev device - **/ -const char *udev_device_get_devpath(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - return udev_device->devpath; -} - -/** - * udev_device_get_syspath: - * @udev_device: udev device - * - * Retrieve the sys path of the udev device. The path is an - * absolute path and starts with the sys mount point. - * - * Returns: the sys path of the udev device - **/ -const char *udev_device_get_syspath(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - return udev_device->syspath; -} - -const char *udev_device_get_sysname(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - return udev_device->sysname; -} - -const char *udev_device_get_sysnum(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - return udev_device->sysnum; -} - -/** - * udev_device_get_devnode: - * @udev_device: udev device - * - * Retrieve the device node file name belonging to the udev device. - * The path is an absolute path, and starts with the device directory. - * - * Returns: the device node file name of the udev device, or #NULL if no device node exists - **/ -const char *udev_device_get_devnode(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - if (!udev_device->info_loaded) - device_load_info(udev_device); - return udev_device->devnode; -} - -/** - * udev_device_get_subsystem: - * @udev_device: udev device - * - * Retrieve the subsystem string of the udev device. The string does not - * contain any "/". - * - * Returns: the subsystem name of the udev device, or #NULL if it can not be determined - **/ -const char *udev_device_get_subsystem(struct udev_device *udev_device) -{ - char subsystem[UTIL_NAME_SIZE]; - - if (udev_device == NULL) - return NULL; - if (!udev_device->subsystem_set) { - udev_device->subsystem_set = 1; - /* read "subsytem" link */ - if (util_get_sys_subsystem(udev_device->udev, udev_device->syspath, subsystem, sizeof(subsystem)) > 0) { - udev_device_set_subsystem(udev_device, subsystem); - return udev_device->subsystem; - } - /* implicit names */ - if (strncmp(udev_device->devpath, "/module/", 8) == 0) { - udev_device_set_subsystem(udev_device, "module"); - return udev_device->subsystem; - } - if (strstr(udev_device->devpath, "/drivers/") != NULL) { - udev_device_set_subsystem(udev_device, "drivers"); - return udev_device->subsystem; - } - if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 || - strncmp(udev_device->devpath, "/class/", 7) == 0 || - strncmp(udev_device->devpath, "/bus/", 5) == 0) { - udev_device_set_subsystem(udev_device, "subsystem"); - return udev_device->subsystem; - } - } - return udev_device->subsystem; -} - -/** - * udev_device_get_devtype: - * @udev_device: udev device - * - * Retrieve the devtype string of the udev device. - * - * Returns: the devtype name of the udev device, or #NULL if it can not be determined - **/ -const char *udev_device_get_devtype(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - if (!udev_device->devtype_set) { - udev_device->devtype_set = 1; - if (!udev_device->info_loaded) - udev_device_read_uevent_file(udev_device); - } - return udev_device->devtype; -} - -/** - * udev_device_get_devlinks_list_entry: - * @udev_device: udev device - * - * Retrieve the list of device links pointing to the device file of - * the udev device. The next list entry can be retrieved with - * udev_list_entry_next(), which returns #NULL if no more entries exist. - * The devlink path can be retrieved from the list entry by - * udev_list_entry_get_name(). The path is an absolute path, and starts with - * the device directory. - * - * Returns: the first entry of the device node link list - **/ -struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - if (!udev_device->info_loaded) - device_load_info(udev_device); - return udev_list_get_entry(&udev_device->devlinks_list); -} - -void udev_device_cleanup_devlinks_list(struct udev_device *udev_device) -{ - udev_device->devlinks_uptodate = 0; - udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list); -} - -/** - * udev_device_get_properties_list_entry: - * @udev_device: udev device - * - * Retrieve the list of key/value device properties of the udev - * device. The next list entry can be retrieved with udev_list_entry_next(), - * which returns #NULL if no more entries exist. The property name - * can be retrieved from the list entry by udev_list_get_name(), - * the property value by udev_list_get_value(). - * - * Returns: the first entry of the property list - **/ -struct udev_list_entry *udev_device_get_properties_list_entry(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - if (!udev_device->info_loaded) - device_load_info(udev_device); - if (!udev_device->devlinks_uptodate) { - char symlinks[UTIL_PATH_SIZE]; - struct udev_list_entry *list_entry; - - udev_device->devlinks_uptodate = 1; - list_entry = udev_device_get_devlinks_list_entry(udev_device); - if (list_entry != NULL) { - char *s; - size_t l; - - s = symlinks; - l = util_strpcpyl(&s, sizeof(symlinks), udev_list_entry_get_name(list_entry), NULL); - udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry)) - l = util_strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry), NULL); - udev_device_add_property(udev_device, "DEVLINKS", symlinks); - } - } - return udev_list_get_entry(&udev_device->properties_list); -} - -const char *udev_device_get_driver(struct udev_device *udev_device) -{ - char driver[UTIL_NAME_SIZE]; - - if (udev_device == NULL) - return NULL; - if (!udev_device->driver_set) { - udev_device->driver_set = 1; - if (util_get_sys_driver(udev_device->udev, udev_device->syspath, driver, sizeof(driver)) > 0) - udev_device->driver = strdup(driver); - } - return udev_device->driver; -} - -dev_t udev_device_get_devnum(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return makedev(0, 0); - if (!udev_device->info_loaded) - device_load_info(udev_device); - return udev_device->devnum; -} - -const char *udev_device_get_action(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return NULL; - return udev_device->action; -} - -unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device) -{ - if (udev_device == NULL) - return 0; - return udev_device->seqnum; -} - -const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const char *sysattr) -{ - struct udev_list_entry *list_entry; - char path[UTIL_PATH_SIZE]; - char value[4096]; - struct stat statbuf; - int fd; - ssize_t size; - const char *val = NULL; - - if (udev_device == NULL) - return NULL; - if (sysattr == NULL) - return NULL; - - /* look for possibly already cached result */ - udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->sysattr_list)) { - if (strcmp(udev_list_entry_get_name(list_entry), sysattr) == 0) { - dbg(udev_device->udev, "got '%s' (%s) from cache\n", - sysattr, udev_list_entry_get_value(list_entry)); - return udev_list_entry_get_value(list_entry); - } - } - - util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL); - if (lstat(path, &statbuf) != 0) { - dbg(udev_device->udev, "no attribute '%s', keep negative entry\n", path); - udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, NULL, 0, 0); - goto out; - } - - if (S_ISLNK(statbuf.st_mode)) { - char target[UTIL_NAME_SIZE]; - int len; - char *pos; - - /* some core links return the last element of the target path */ - if (strcmp(sysattr, "driver") != 0 && - strcmp(sysattr, "subsystem") != 0 && - strcmp(sysattr, "module") != 0) - goto out; - - len = readlink(path, target, sizeof(target)); - if (len > 0) { - target[len] = '\0'; - pos = strrchr(target, '/'); - if (pos != NULL) { - pos = &pos[1]; - dbg(udev_device->udev, "cache '%s' with link value '%s'\n", sysattr, pos); - list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, pos, 0, 0); - val = udev_list_entry_get_value(list_entry); - } - } - goto out; - } - - /* skip directories */ - if (S_ISDIR(statbuf.st_mode)) - goto out; - - /* skip non-readable files */ - if ((statbuf.st_mode & S_IRUSR) == 0) - goto out; - - /* read attribute value */ - fd = open(path, O_RDONLY); - if (fd < 0) { - dbg(udev_device->udev, "attribute '%s' can not be opened\n", path); - goto out; - } - size = read(fd, value, sizeof(value)); - close(fd); - if (size < 0) - goto out; - if (size == sizeof(value)) - goto out; - - /* got a valid value, store it in cache and return it */ - value[size] = '\0'; - util_remove_trailing_chars(value, '\n'); - dbg(udev_device->udev, "'%s' has attribute value '%s'\n", path, value); - list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, value, 0, 0); - val = udev_list_entry_get_value(list_entry); -out: - return val; -} - -int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath) -{ - const char *pos; - size_t len; - - free(udev_device->syspath); - udev_device->syspath = strdup(syspath); - if (udev_device->syspath == NULL) - return -ENOMEM; - udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))]; - udev_device_add_property(udev_device, "DEVPATH", udev_device->devpath); - - pos = strrchr(udev_device->syspath, '/'); - if (pos == NULL) - return -EINVAL; - udev_device->sysname = strdup(&pos[1]); - if (udev_device->sysname == NULL) - return -ENOMEM; - - /* some devices have '!' in their name, change that to '/' */ - len = 0; - while (udev_device->sysname[len] != '\0') { - if (udev_device->sysname[len] == '!') - udev_device->sysname[len] = '/'; - len++; - } - - /* trailing number */ - while (len > 0 && isdigit(udev_device->sysname[--len])) - udev_device->sysnum = &udev_device->sysname[len]; - - /* sysname is completely numeric */ - if (len == 0) - udev_device->sysnum = NULL; - - return 0; -} - -int udev_device_set_subsystem(struct udev_device *udev_device, const char *subsystem) -{ - free(udev_device->subsystem); - udev_device->subsystem = strdup(subsystem); - if (udev_device->subsystem == NULL) - return -ENOMEM; - udev_device->subsystem_set = 1; - udev_device_add_property(udev_device, "SUBSYSTEM", udev_device->subsystem); - return 0; -} - -int udev_device_set_devtype(struct udev_device *udev_device, const char *devtype) -{ - free(udev_device->devtype); - udev_device->devtype = strdup(devtype); - if (udev_device->devtype == NULL) - return -ENOMEM; - udev_device->devtype_set = 1; - udev_device_add_property(udev_device, "DEVTYPE", udev_device->devtype); - return 0; -} - -int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode) -{ - free(udev_device->devnode); - udev_device->devnode = strdup(devnode); - if (devnode == NULL) - return 0; - if (udev_device->devnode == NULL) - return -ENOMEM; - udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode); - return 0; -} - -int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink) -{ - udev_device->devlinks_uptodate = 0; - if (udev_list_entry_add(udev_device->udev, &udev_device->devlinks_list, devlink, NULL, 1, 0) == NULL) - return -ENOMEM; - return 0; -} - -struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value) -{ - udev_device->envp_uptodate = 0; - if (value == NULL) { - struct udev_list_entry *list_entry; - - list_entry = udev_device_get_properties_list_entry(udev_device); - list_entry = udev_list_entry_get_by_name(list_entry, key); - if (list_entry != NULL) - udev_list_entry_delete(list_entry); - return NULL; - } - return udev_list_entry_add(udev_device->udev, &udev_device->properties_list, key, value, 1, 0); -} - -struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property) -{ - char name[UTIL_PATH_SIZE]; - char *val; - - util_strscpy(name, sizeof(name), property); - val = strchr(name, '='); - if (val == NULL) - return NULL; - val[0] = '\0'; - val = &val[1]; - if (val[0] == '\0') - val = NULL; - return udev_device_add_property(udev_device, name, val); -} - -const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key) -{ - struct udev_list_entry *list_entry; - - if (udev_device == NULL) - return NULL; - if (key == NULL) - return NULL; - - list_entry = udev_device_get_properties_list_entry(udev_device); - list_entry = udev_list_entry_get_by_name(list_entry, key); - return udev_list_entry_get_value(list_entry); -} - -#define ENVP_SIZE 128 -#define MONITOR_BUF_SIZE 4096 -static int update_envp_monitor_buf(struct udev_device *udev_device) -{ - struct udev_list_entry *list_entry; - char *s; - size_t l; - unsigned int i; - - /* monitor buffer of property strings */ - free(udev_device->monitor_buf); - udev_device->monitor_buf_len = 0; - udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE); - if (udev_device->monitor_buf == NULL) - return -ENOMEM; - - /* envp array, strings will point into monitor buffer */ - if (udev_device->envp == NULL) - udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE); - if (udev_device->envp == NULL) - return -ENOMEM; - - i = 0; - s = udev_device->monitor_buf; - l = MONITOR_BUF_SIZE; - udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) { - /* add string to envp array */ - udev_device->envp[i++] = s; - if (i+1 >= ENVP_SIZE) - return -EINVAL; - - /* add property string to monitor buffer */ - l = util_strpcpyl(&s, l, udev_list_entry_get_name(list_entry), "=", - udev_list_entry_get_value(list_entry), NULL); - if (l == 0) - return -EINVAL; - s++; - } - udev_device->envp[i] = NULL; - udev_device->monitor_buf_len = s - udev_device->monitor_buf; - udev_device->envp_uptodate = 1; - dbg(udev_device->udev, "filled envp/monitor buffer, %u properties, %zu bytes\n", - i, udev_device->monitor_buf_len); - return 0; -} - -char **udev_device_get_properties_envp(struct udev_device *udev_device) -{ - if (!udev_device->envp_uptodate) - if (update_envp_monitor_buf(udev_device) != 0) - return NULL; - return udev_device->envp; -} - -ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf) -{ - if (!udev_device->envp_uptodate) - if (update_envp_monitor_buf(udev_device) != 0) - return -EINVAL; - *buf = udev_device->monitor_buf; - return udev_device->monitor_buf_len; -} - -int udev_device_set_action(struct udev_device *udev_device, const char *action) -{ - free(udev_device->action); - udev_device->action = strdup(action); - if (udev_device->action == NULL) - return -ENOMEM; - udev_device_add_property(udev_device, "ACTION", udev_device->action); - return 0; -} - -int udev_device_set_driver(struct udev_device *udev_device, const char *driver) -{ - free(udev_device->driver); - udev_device->driver = strdup(driver); - if (udev_device->driver == NULL) - return -ENOMEM; - udev_device->driver_set = 1; - udev_device_add_property(udev_device, "DRIVER", udev_device->driver); - return 0; -} - -const char *udev_device_get_devpath_old(struct udev_device *udev_device) -{ - return udev_device->devpath_old; -} - -int udev_device_set_devpath_old(struct udev_device *udev_device, const char *devpath_old) -{ - udev_device->devpath_old = strdup(devpath_old); - if (udev_device->devpath_old == NULL) - return -ENOMEM; - udev_device_add_property(udev_device, "DEVPATH_OLD", udev_device->devpath_old); - return 0; -} - -const char *udev_device_get_knodename(struct udev_device *udev_device) -{ - return udev_device->knodename; -} - -int udev_device_set_knodename(struct udev_device *udev_device, const char *knodename) -{ - udev_device->knodename = strdup(knodename); - if (udev_device->knodename == NULL) - return -ENOMEM; - return 0; -} - -int udev_device_get_timeout(struct udev_device *udev_device) -{ - return udev_device->timeout; -} - -int udev_device_set_timeout(struct udev_device *udev_device, int timeout) -{ - udev_device->timeout = timeout; - return 0; -} -int udev_device_get_event_timeout(struct udev_device *udev_device) -{ - if (!udev_device->info_loaded) - device_load_info(udev_device); - return udev_device->event_timeout; -} - -int udev_device_set_event_timeout(struct udev_device *udev_device, int event_timeout) -{ - udev_device->event_timeout = event_timeout; - return 0; -} - -int udev_device_set_seqnum(struct udev_device *udev_device, unsigned long long int seqnum) -{ - char num[32]; - - udev_device->seqnum = seqnum; - snprintf(num, sizeof(num), "%llu", seqnum); - udev_device_add_property(udev_device, "SEQNUM", num); - return 0; -} - -int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum) -{ - char num[32]; - - udev_device->devnum = devnum; - - snprintf(num, sizeof(num), "%u", major(devnum)); - udev_device_add_property(udev_device, "MAJOR", num); - snprintf(num, sizeof(num), "%u", minor(devnum)); - udev_device_add_property(udev_device, "MINOR", num); - return 0; -} - -int udev_device_get_num_fake_partitions(struct udev_device *udev_device) -{ - if (!udev_device->info_loaded) - device_load_info(udev_device); - return udev_device->num_fake_partitions; -} - -int udev_device_set_num_fake_partitions(struct udev_device *udev_device, int num) -{ - udev_device->num_fake_partitions = num; - return 0; -} - -int udev_device_get_devlink_priority(struct udev_device *udev_device) -{ - if (!udev_device->info_loaded) - device_load_info(udev_device); - return udev_device->devlink_priority; -} - -int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio) -{ - udev_device->devlink_priority = prio; - return 0; -} - -int udev_device_get_ignore_remove(struct udev_device *udev_device) -{ - if (!udev_device->info_loaded) - device_load_info(udev_device); - return udev_device->ignore_remove; -} - -int udev_device_set_ignore_remove(struct udev_device *udev_device, int ignore) -{ - udev_device->ignore_remove = ignore; - return 0; -} - -int udev_device_get_watch_handle(struct udev_device *udev_device) -{ - if (!udev_device->info_loaded) - device_load_info(udev_device); - return udev_device->watch_handle; -} - -int udev_device_set_watch_handle(struct udev_device *udev_device, int handle) -{ - udev_device->watch_handle = handle; - return 0; -} |