diff options
Diffstat (limited to 'libsysfs/sysfs_utils.c')
-rw-r--r-- | libsysfs/sysfs_utils.c | 290 |
1 files changed, 0 insertions, 290 deletions
diff --git a/libsysfs/sysfs_utils.c b/libsysfs/sysfs_utils.c deleted file mode 100644 index c5558a43a1..0000000000 --- a/libsysfs/sysfs_utils.c +++ /dev/null @@ -1,290 +0,0 @@ -/* - * sysfs_utils.c - * - * System utility functions for libsysfs - * - * Copyright (C) IBM Corp. 2003-2005 - * - * 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. - * - * This library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ -#include "libsysfs.h" -#include "sysfs.h" - -/** - * sysfs_remove_trailing_slash: Removes any trailing '/' in the given path - * @path: Path to look for the trailing '/' - * Returns 0 on success 1 on error - */ -int sysfs_remove_trailing_slash(char *path) -{ - size_t len; - - if (!path) { - errno = EINVAL; - return 1; - } - - len = strlen(path); - while (len > 0 && path[len-1] == '/') - path[--len] = '\0'; - return 0; -} - -/* - * sysfs_get_mnt_path: Gets the sysfs mount point. - * @mnt_path: place to put "sysfs" mount point - * @len: size of mnt_path - * returns 0 with success and -1 with error. - */ -int sysfs_get_mnt_path(char *mnt_path, size_t len) -{ - static char sysfs_path[SYSFS_PATH_MAX] = ""; - const char *sysfs_path_env; - - /* evaluate only at the first call */ - if (sysfs_path[0] == '\0') { - /* possible overrride of real mount path */ - sysfs_path_env = getenv(SYSFS_PATH_ENV); - if (sysfs_path_env != NULL) { - safestrcpymax(mnt_path, sysfs_path_env, len); - sysfs_remove_trailing_slash(mnt_path); - return 0; - } - safestrcpymax(mnt_path, SYSFS_MNT_PATH, len); - } - - return 0; -} - -/** - * sysfs_get_name_from_path: returns last name from a "/" delimited path - * @path: path to get name from - * @name: where to put name - * @len: size of name - */ -int sysfs_get_name_from_path(const char *path, char *name, size_t len) -{ - char tmp[SYSFS_PATH_MAX]; - char *n = NULL; - - if (!path || !name || len == 0) { - errno = EINVAL; - return -1; - } - memset(tmp, 0, SYSFS_PATH_MAX); - safestrcpy(tmp, path); - n = strrchr(tmp, '/'); - if (n == NULL) { - errno = EINVAL; - return -1; - } - if (*(n+1) == '\0') { - *n = '\0'; - n = strrchr(tmp, '/'); - if (n == NULL) { - errno = EINVAL; - return -1; - } - } - n++; - safestrcpymax(name, n, len); - return 0; -} - -/** - * sysfs_get_link: returns link source - * @path: symbolic link's path - * @target: where to put name - * @len: size of name - */ -int sysfs_get_link(const char *path, char *target, size_t len) -{ - char devdir[SYSFS_PATH_MAX]; - char linkpath[SYSFS_PATH_MAX]; - char temp_path[SYSFS_PATH_MAX]; - char *d = NULL, *s = NULL; - int slashes = 0, count = 0; - - if (!path || !target || len == 0) { - errno = EINVAL; - return -1; - } - - memset(devdir, 0, SYSFS_PATH_MAX); - memset(linkpath, 0, SYSFS_PATH_MAX); - memset(temp_path, 0, SYSFS_PATH_MAX); - safestrcpy(devdir, path); - - if ((readlink(path, linkpath, SYSFS_PATH_MAX)) < 0) { - return -1; - } - d = linkpath; - /* - * Three cases here: - * 1. relative path => format ../.. - * 2. absolute path => format /abcd/efgh - * 3. relative path _from_ this dir => format abcd/efgh - */ - switch (*d) { - case '.': - /* - * handle the case where link is of type ./abcd/xxx - */ - safestrcpy(temp_path, devdir); - if (*(d+1) == '/') - d += 2; - else if (*(d+1) == '.') - goto parse_path; - s = strrchr(temp_path, '/'); - if (s != NULL) { - *(s+1) = '\0'; - safestrcat(temp_path, d); - } else { - safestrcpy(temp_path, d); - } - safestrcpymax(target, temp_path, len); - break; - /* - * relative path, getting rid of leading "../.." - */ -parse_path: - while (*d == '/' || *d == '.') { - if (*d == '/') - slashes++; - d++; - } - d--; - s = &devdir[strlen(devdir)-1]; - while (s != NULL && count != (slashes+1)) { - s--; - if (*s == '/') - count++; - } - safestrcpymax(s, d, (SYSFS_PATH_MAX-strlen(devdir))); - safestrcpymax(target, devdir, len); - break; - case '/': - /* absolute path - copy as is */ - safestrcpymax(target, linkpath, len); - break; - default: - /* relative path from this directory */ - safestrcpy(temp_path, devdir); - s = strrchr(temp_path, '/'); - if (s != NULL) { - *(s+1) = '\0'; - safestrcat(temp_path, linkpath); - } else { - safestrcpy(temp_path, linkpath); - } - safestrcpymax(target, temp_path, len); - } - return 0; -} - -/** - * sysfs_close_list: generic list free routine - * @list: dlist to free - * Returns nothing - */ -void sysfs_close_list(struct dlist *list) -{ - if (list) - dlist_destroy(list); -} - -/** - * sysfs_open_directory_list: gets a list of all directories under "path" - * @path: path to read - * Returns a dlist of supported names or NULL no directories (errno is set - * in case of error - */ -struct dlist *sysfs_open_directory_list(const char *path) -{ - if (!path) - return NULL; - - return (read_dir_subdirs(path)); -} - -/** - * sysfs_path_is_dir: Check if the path supplied points to a directory - * @path: path to validate - * Returns 0 if path points to dir, 1 otherwise - */ -int sysfs_path_is_dir(const char *path) -{ - struct stat astats; - - if (!path) { - errno = EINVAL; - return 1; - } - if ((lstat(path, &astats)) != 0) { - dprintf("stat() failed\n"); - return 1; - } - if (S_ISDIR(astats.st_mode)) - return 0; - - return 1; -} - -/** - * sysfs_path_is_link: Check if the path supplied points to a link - * @path: path to validate - * Returns 0 if path points to link, 1 otherwise - */ -int sysfs_path_is_link(const char *path) -{ - struct stat astats; - - if (!path) { - errno = EINVAL; - return 1; - } - if ((lstat(path, &astats)) != 0) { - dprintf("stat() failed\n"); - return 1; - } - if (S_ISLNK(astats.st_mode)) - return 0; - - return 1; -} - -/** - * sysfs_path_is_file: Check if the path supplied points to a file - * @path: path to validate - * Returns 0 if path points to file, 1 otherwise - */ -int sysfs_path_is_file(const char *path) -{ - struct stat astats; - - if (!path) { - errno = EINVAL; - return 1; - } - if ((lstat(path, &astats)) != 0) { - dprintf("stat() failed\n"); - return 1; - } - if (S_ISREG(astats.st_mode)) - return 0; - - return 1; -} |