diff options
Diffstat (limited to 'udev/lib/libudev-enumerate.c')
-rw-r--r-- | udev/lib/libudev-enumerate.c | 479 |
1 files changed, 0 insertions, 479 deletions
diff --git a/udev/lib/libudev-enumerate.c b/udev/lib/libudev-enumerate.c deleted file mode 100644 index 63f84062b2..0000000000 --- a/udev/lib/libudev-enumerate.c +++ /dev/null @@ -1,479 +0,0 @@ -/* - * libudev - interface to udev device information - * - * Copyright (C) 2008 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 <fnmatch.h> -#include <sys/stat.h> - -#include "libudev.h" -#include "libudev-private.h" - -static int devices_sort(struct udev_enumerate *udev_enumerate); - -struct udev_enumerate { - struct udev *udev; - int refcount; - struct udev_list_node sysattr_match_list; - struct udev_list_node sysattr_nomatch_list; - struct udev_list_node subsystem_match_list; - struct udev_list_node subsystem_nomatch_list; - struct udev_list_node properties_match_list; - struct udev_list_node devices_list; - int devices_sorted; -}; - -/** - * udev_enumerate_new: - * @udev: udev library context - * - * Returns: an enumeration context - **/ -struct udev_enumerate *udev_enumerate_new(struct udev *udev) -{ - struct udev_enumerate *udev_enumerate; - - udev_enumerate = calloc(1, sizeof(struct udev_enumerate)); - if (udev_enumerate == NULL) - return NULL; - udev_enumerate->refcount = 1; - udev_enumerate->udev = udev; - udev_list_init(&udev_enumerate->devices_list); - udev_list_init(&udev_enumerate->sysattr_match_list); - udev_list_init(&udev_enumerate->sysattr_nomatch_list); - udev_list_init(&udev_enumerate->subsystem_match_list); - udev_list_init(&udev_enumerate->subsystem_nomatch_list); - udev_list_init(&udev_enumerate->properties_match_list); - return udev_enumerate; -} - -struct udev_enumerate *udev_enumerate_ref(struct udev_enumerate *udev_enumerate) -{ - if (udev_enumerate == NULL) - return NULL; - udev_enumerate->refcount++; - return udev_enumerate; -} - -void udev_enumerate_unref(struct udev_enumerate *udev_enumerate) -{ - if (udev_enumerate == NULL) - return; - udev_enumerate->refcount--; - if (udev_enumerate->refcount > 0) - return; - udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->devices_list); - udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->sysattr_match_list); - udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->sysattr_nomatch_list); - udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->subsystem_match_list); - udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->subsystem_nomatch_list); - udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->properties_match_list); - free(udev_enumerate); -} - -struct udev *udev_enumerate_get_udev(struct udev_enumerate *udev_enumerate) -{ - if (udev_enumerate == NULL) - return NULL; - return udev_enumerate->udev; -} - -struct udev_list_entry *udev_enumerate_get_list_entry(struct udev_enumerate *udev_enumerate) -{ - if (udev_enumerate == NULL) - return NULL; - if (!udev_enumerate->devices_sorted) - devices_sort(udev_enumerate); - return udev_list_get_entry(&udev_enumerate->devices_list); -} - -int udev_enumerate_add_match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem) -{ - if (udev_enumerate == NULL) - return -EINVAL; - if (subsystem == NULL) - return 0; - if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate), - &udev_enumerate->subsystem_match_list, subsystem, NULL, 1, 0) == NULL) - return -ENOMEM; - return 0; -} - -int udev_enumerate_add_nomatch_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem) -{ - if (udev_enumerate == NULL) - return -EINVAL; - if (subsystem == NULL) - return 0; - if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate), - &udev_enumerate->subsystem_nomatch_list, subsystem, NULL, 1, 0) == NULL) - return -ENOMEM; - return 0; -} - -int udev_enumerate_add_match_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value) -{ - if (udev_enumerate == NULL) - return -EINVAL; - if (sysattr == NULL) - return 0; - if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate), - &udev_enumerate->sysattr_match_list, sysattr, value, 0, 0) == NULL) - return -ENOMEM; - return 0; -} - -int udev_enumerate_add_nomatch_sysattr(struct udev_enumerate *udev_enumerate, const char *sysattr, const char *value) -{ - if (udev_enumerate == NULL) - return -EINVAL; - if (sysattr == NULL) - return 0; - if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate), - &udev_enumerate->sysattr_nomatch_list, sysattr, value, 0, 0) == NULL) - return -ENOMEM; - return 0; -} - -static int match_sysattr_value(struct udev *udev, const char *syspath, const char *sysattr, const char *match_val) -{ - struct udev_device *device; - const char *val = NULL; - int match = 0; - - device = udev_device_new_from_syspath(udev, syspath); - if (device == NULL) - return -EINVAL; - val = udev_device_get_sysattr_value(device, sysattr); - if (val == NULL) - goto exit; - if (match_val == NULL) { - match = 1; - goto exit; - } - if (fnmatch(match_val, val, 0) == 0) { - match = 1; - goto exit; - } -exit: - udev_device_unref(device); - return match; -} - -int udev_enumerate_add_match_property(struct udev_enumerate *udev_enumerate, const char *property, const char *value) -{ - if (udev_enumerate == NULL) - return -EINVAL; - if (property == NULL) - return 0; - if (udev_list_entry_add(udev_enumerate_get_udev(udev_enumerate), - &udev_enumerate->properties_match_list, property, value, 0, 0) == NULL) - return -ENOMEM; - return 0; -} - -static int match_sysattr(struct udev_enumerate *udev_enumerate, const char *syspath) -{ - struct udev *udev = udev_enumerate_get_udev(udev_enumerate); - struct udev_list_entry *list_entry; - - /* skip list */ - udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->sysattr_nomatch_list)) { - if (match_sysattr_value(udev, syspath, - udev_list_entry_get_name(list_entry), - udev_list_entry_get_value(list_entry))) - return 0; - } - /* include list */ - if (udev_list_get_entry(&udev_enumerate->sysattr_match_list) != NULL) { - udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->sysattr_match_list)) { - /* anything that does not match, will make it FALSE */ - if (!match_sysattr_value(udev, syspath, - udev_list_entry_get_name(list_entry), - udev_list_entry_get_value(list_entry))) - return 0; - } - return 1; - } - return 1; -} - -static int match_property(struct udev_enumerate *udev_enumerate, const char *syspath) -{ - struct udev_device *dev; - struct udev_list_entry *list_entry; - int match = 0; - - /* no match always matches */ - if (udev_list_get_entry(&udev_enumerate->properties_match_list) == NULL) - return 1; - - /* no device does not match */ - dev = udev_device_new_from_syspath(udev_enumerate->udev, syspath); - if (dev == NULL) - return 0; - - /* loop over matches */ - udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->properties_match_list)) { - const char *match_key = udev_list_entry_get_name(list_entry); - const char *match_value = udev_list_entry_get_value(list_entry); - struct udev_list_entry *property_entry; - - /* loop over device properties */ - udev_list_entry_foreach(property_entry, udev_device_get_properties_list_entry(dev)) { - const char *dev_key = udev_list_entry_get_name(property_entry); - const char *dev_value = udev_list_entry_get_value(property_entry); - - if (fnmatch(match_key, dev_key, 0) != 0) - continue; - if (match_value == NULL && dev_value == NULL) { - match = 1; - goto out; - } - if (match_value == NULL || dev_value == NULL) - continue; - if (fnmatch(match_value, dev_value, 0) == 0) { - match = 1; - goto out; - } - } - } -out: - udev_device_unref(dev); - return match; -} - -static int scan_dir_and_add_devices(struct udev_enumerate *udev_enumerate, - const char *basedir, const char *subdir1, const char *subdir2) -{ - struct udev *udev = udev_enumerate_get_udev(udev_enumerate); - char path[UTIL_PATH_SIZE]; - size_t l; - char *s; - DIR *dir; - struct dirent *dent; - - s = path; - l = util_strpcpyl(&s, sizeof(path), udev_get_sys_path(udev), "/", basedir, NULL); - if (subdir1 != NULL) - l = util_strpcpyl(&s, l, "/", subdir1, NULL); - if (subdir2 != NULL) - l = util_strpcpyl(&s, l, "/", subdir2, NULL); - dir = opendir(path); - if (dir == NULL) - return -1; - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - char syspath[UTIL_PATH_SIZE]; - char filename[UTIL_PATH_SIZE]; - struct stat statbuf; - - if (dent->d_name[0] == '.') - continue; - util_strscpyl(syspath, sizeof(syspath), path, "/", dent->d_name, NULL); - if (lstat(syspath, &statbuf) != 0) - continue; - if (S_ISREG(statbuf.st_mode)) - continue; - if (S_ISLNK(statbuf.st_mode)) - util_resolve_sys_link(udev, syspath, sizeof(syspath)); - - util_strscpyl(filename, sizeof(filename), syspath, "/uevent", NULL); - if (stat(filename, &statbuf) != 0) - continue; - if (!match_sysattr(udev_enumerate, syspath)) - continue; - if (!match_property(udev_enumerate, syspath)) - continue; - udev_list_entry_add(udev, &udev_enumerate->devices_list, syspath, NULL, 1, 1); - } - closedir(dir); - return 0; -} - -static int match_subsystem(struct udev_enumerate *udev_enumerate, const char *subsystem) -{ - struct udev_list_entry *list_entry; - - udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->subsystem_nomatch_list)) { - if (fnmatch(udev_list_entry_get_name(list_entry), subsystem, 0) == 0) - return 0; - } - if (udev_list_get_entry(&udev_enumerate->subsystem_match_list) != NULL) { - udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->subsystem_match_list)) { - if (fnmatch(udev_list_entry_get_name(list_entry), subsystem, 0) == 0) - return 1; - } - return 0; - } - return 1; -} - -static int scan_dir(struct udev_enumerate *udev_enumerate, const char *basedir, const char *subdir, const char *subsystem) -{ - struct udev *udev = udev_enumerate_get_udev(udev_enumerate); - - char path[UTIL_PATH_SIZE]; - DIR *dir; - struct dirent *dent; - - util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), "/", basedir, NULL); - dir = opendir(path); - if (dir == NULL) - return -1; - for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) { - if (dent->d_name[0] == '.') - continue; - if (!match_subsystem(udev_enumerate, subsystem != NULL ? subsystem : dent->d_name)) - continue; - scan_dir_and_add_devices(udev_enumerate, basedir, dent->d_name, subdir); - } - closedir(dir); - return 0; -} - -static int devices_delay(struct udev *udev, const char *syspath) -{ - static const char *delay_device_list[] = { - "/block/md", - "/block/dm-", - NULL - }; - size_t len; - int i; - - len = strlen(udev_get_sys_path(udev)); - for (i = 0; delay_device_list[i] != NULL; i++) { - if (strstr(&syspath[len], delay_device_list[i]) != NULL) { - dbg(udev, "delaying: %s\n", syspath); - return 1; - } - } - return 0; -} - -/* sort delayed devices to the end of the list */ -static int devices_sort(struct udev_enumerate *udev_enumerate) -{ - struct udev_list_entry *entry_loop; - struct udev_list_entry *entry_tmp; - struct udev_list_node devices_list; - - udev_list_init(&devices_list); - /* move delayed to delay list */ - udev_list_entry_foreach_safe(entry_loop, entry_tmp, udev_list_get_entry(&udev_enumerate->devices_list)) { - if (devices_delay(udev_enumerate->udev, udev_list_entry_get_name(entry_loop))) { - udev_list_entry_remove(entry_loop); - udev_list_entry_append(entry_loop, &devices_list); - } - } - /* move delayed back to end of list */ - udev_list_entry_foreach_safe(entry_loop, entry_tmp, udev_list_get_entry(&devices_list)) { - udev_list_entry_remove(entry_loop); - udev_list_entry_append(entry_loop, &udev_enumerate->devices_list); - } - udev_enumerate->devices_sorted = 1; - return 0; -} - -int udev_enumerate_add_syspath(struct udev_enumerate *udev_enumerate, const char *syspath) -{ - struct udev *udev = udev_enumerate_get_udev(udev_enumerate); - struct udev_device *udev_device; - - if (udev_enumerate == NULL) - return -EINVAL; - if (syspath == NULL) - return 0; - /* resolve to real syspath */ - udev_device = udev_device_new_from_syspath(udev_enumerate->udev, syspath); - if (udev_device == NULL) - return -EINVAL; - udev_list_entry_add(udev, &udev_enumerate->devices_list, - udev_device_get_syspath(udev_device), NULL, 1, 1); - udev_device_unref(udev_device); - return 0; -} - -/** - * udev_enumerate_scan_devices: - * @udev_enumerate: udev enumeration context - * - * Returns: a negative value on error. - **/ -int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate) -{ - struct udev *udev = udev_enumerate_get_udev(udev_enumerate); - char base[UTIL_PATH_SIZE]; - struct stat statbuf; - - if (udev_enumerate == NULL) - return -EINVAL; - util_strscpyl(base, sizeof(base), udev_get_sys_path(udev), "/subsystem", NULL); - if (stat(base, &statbuf) == 0) { - /* we have /subsystem/, forget all the old stuff */ - dbg(udev, "searching '/subsystem/*/devices/*' dir\n"); - scan_dir(udev_enumerate, "subsystem", "devices", NULL); - } else { - dbg(udev, "searching '/bus/*/devices/*' dir\n"); - scan_dir(udev_enumerate, "bus", "devices", NULL); - dbg(udev, "searching '/class/*' dir\n"); - scan_dir(udev_enumerate, "class", NULL, NULL); - /* if block isn't a class, scan /block/ */ - util_strscpyl(base, sizeof(base), udev_get_sys_path(udev), "/class/block", NULL); - if (stat(base, &statbuf) != 0) { - if (match_subsystem(udev_enumerate, "block")) { - dbg(udev, "searching '/block/*' dir\n"); - /* scan disks */ - scan_dir_and_add_devices(udev_enumerate, "block", NULL, NULL); - /* scan partitions */ - dbg(udev, "searching '/block/*/*' dir\n"); - scan_dir(udev_enumerate, "block", NULL, "block"); - } - } - } - return 0; -} - -/** - * udev_enumerate_scan_subsystems: - * @udev_enumerate: udev enumeration context - * - * Returns: a negative value on error. - **/ -int udev_enumerate_scan_subsystems(struct udev_enumerate *udev_enumerate) -{ - struct udev *udev = udev_enumerate_get_udev(udev_enumerate); - char base[UTIL_PATH_SIZE]; - struct stat statbuf; - const char *subsysdir; - - if (udev_enumerate == NULL) - return -EINVAL; - util_strscpyl(base, sizeof(base), udev_get_sys_path(udev), "/subsystem", NULL); - if (stat(base, &statbuf) == 0) - subsysdir = "subsystem"; - else - subsysdir = "bus"; - if (match_subsystem(udev_enumerate, "subsystem")) { - dbg(udev, "searching '%s/*' dir\n", subsysdir); - scan_dir_and_add_devices(udev_enumerate, subsysdir, NULL, NULL); - } - if (match_subsystem(udev_enumerate, "drivers")) { - dbg(udev, "searching '%s/*/drivers/*' dir\n", subsysdir); - scan_dir(udev_enumerate, subsysdir, "drivers", "drivers"); - } - return 0; -} |