diff options
Diffstat (limited to 'e2fsprogs/ext2fs/finddev.c')
| -rw-r--r-- | e2fsprogs/ext2fs/finddev.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/e2fsprogs/ext2fs/finddev.c b/e2fsprogs/ext2fs/finddev.c deleted file mode 100644 index 5e2cce9..0000000 --- a/e2fsprogs/ext2fs/finddev.c +++ /dev/null @@ -1,199 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * finddev.c -- this routine attempts to find a particular device in - * /dev - * - * Copyright (C) 2000 Theodore Ts'o. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - */ - -#include <stdio.h> -#include <string.h> -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif -#include <stdlib.h> -#include <string.h> -#ifdef HAVE_SYS_TYPES_H -#include <sys/types.h> -#endif -#ifdef HAVE_SYS_STAT_H -#include <sys/stat.h> -#endif -#include <dirent.h> -#ifdef HAVE_ERRNO_H -#include <errno.h> -#endif -#ifdef HAVE_SYS_MKDEV_H -#include <sys/mkdev.h> -#endif - -#include "ext2_fs.h" -#include "ext2fs.h" - -struct dir_list { - char *name; - struct dir_list *next; -}; - -/* - * This function adds an entry to the directory list - */ -static void add_to_dirlist(const char *name, struct dir_list **list) -{ - struct dir_list *dp; - - dp = xmalloc(sizeof(struct dir_list)); - dp->name = xmalloc(strlen(name)+1); - strcpy(dp->name, name); - dp->next = *list; - *list = dp; -} - -/* - * This function frees a directory list - */ -static void free_dirlist(struct dir_list **list) -{ - struct dir_list *dp, *next; - - for (dp = *list; dp; dp = next) { - next = dp->next; - free(dp->name); - free(dp); - } - *list = 0; -} - -static int scan_dir(char *dir_name, dev_t device, struct dir_list **list, - char **ret_path) -{ - DIR *dir; - struct dirent *dp; - char path[1024], *cp; - int dirlen; - struct stat st; - - dirlen = strlen(dir_name); - if ((dir = opendir(dir_name)) == NULL) - return errno; - dp = readdir(dir); - while (dp) { - if (dirlen + strlen(dp->d_name) + 2 >= sizeof(path)) - goto skip_to_next; - if (dp->d_name[0] == '.' && - ((dp->d_name[1] == 0) || - ((dp->d_name[1] == '.') && (dp->d_name[2] == 0)))) - goto skip_to_next; - sprintf(path, "%s/%s", dir_name, dp->d_name); - if (stat(path, &st) < 0) - goto skip_to_next; - if (S_ISDIR(st.st_mode)) - add_to_dirlist(path, list); - if (S_ISBLK(st.st_mode) && st.st_rdev == device) { - cp = xmalloc(strlen(path)+1); - strcpy(cp, path); - *ret_path = cp; - goto success; - } - skip_to_next: - dp = readdir(dir); - } -success: - closedir(dir); - return 0; -} - -/* - * This function finds the pathname to a block device with a given - * device number. It returns a pointer to allocated memory to the - * pathname on success, and NULL on failure. - */ -char *ext2fs_find_block_device(dev_t device) -{ - struct dir_list *list = 0, *new_list = 0; - struct dir_list *current; - char *ret_path = 0; - - /* - * Add the starting directories to search... - */ - add_to_dirlist("/devices", &list); - add_to_dirlist("/devfs", &list); - add_to_dirlist("/dev", &list); - - while (list) { - current = list; - list = list->next; -#ifdef DEBUG - printf("Scanning directory %s\n", current->name); -#endif - scan_dir(current->name, device, &new_list, &ret_path); - free(current->name); - free(current); - if (ret_path) - break; - /* - * If we're done checking at this level, descend to - * the next level of subdirectories. (breadth-first) - */ - if (list == 0) { - list = new_list; - new_list = 0; - } - } - free_dirlist(&list); - free_dirlist(&new_list); - return ret_path; -} - - -#ifdef DEBUG -int main(int argc, char** argv) -{ - char *devname, *tmp; - int major, minor; - dev_t device; - const char *errmsg = "Cannot parse %s: %s\n"; - - if ((argc != 2) && (argc != 3)) { - fprintf(stderr, "Usage: %s device_number\n", argv[0]); - fprintf(stderr, "\t: %s major minor\n", argv[0]); - exit(1); - } - if (argc == 2) { - device = strtoul(argv[1], &tmp, 0); - if (*tmp) { - fprintf(stderr, errmsg, "device number", argv[1]); - exit(1); - } - } else { - major = strtoul(argv[1], &tmp, 0); - if (*tmp) { - fprintf(stderr, errmsg, "major number", argv[1]); - exit(1); - } - minor = strtoul(argv[2], &tmp, 0); - if (*tmp) { - fprintf(stderr, errmsg, "minor number", argv[2]); - exit(1); - } - device = makedev(major, minor); - printf("Looking for device 0x%04x (%d:%d)\n", device, - major, minor); - } - devname = ext2fs_find_block_device(device); - if (devname) { - printf("Found device! %s\n", devname); - free(devname); - } else { - printf("Cannot find device.\n"); - } - return 0; -} - -#endif |