The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame^] | 1 | #include <stdio.h> |
| 2 | #include <unistd.h> |
| 3 | #include <string.h> |
| 4 | #include <errno.h> |
| 5 | #include <dirent.h> |
| 6 | #include <limits.h> |
| 7 | #include <sys/stat.h> |
| 8 | #include <sys/types.h> |
| 9 | |
| 10 | static int usage() |
| 11 | { |
| 12 | fprintf(stderr,"rm [-rR] <target>\n"); |
| 13 | return -1; |
| 14 | } |
| 15 | |
| 16 | /* return -1 on failure, with errno set to the first error */ |
| 17 | static int unlink_recursive(const char* name) |
| 18 | { |
| 19 | struct stat st; |
| 20 | DIR *dir; |
| 21 | struct dirent *de; |
| 22 | int fail = 0; |
| 23 | |
| 24 | /* is it a file or directory? */ |
| 25 | if (lstat(name, &st) < 0) |
| 26 | return -1; |
| 27 | |
| 28 | /* a file, so unlink it */ |
| 29 | if (!S_ISDIR(st.st_mode)) |
| 30 | return unlink(name); |
| 31 | |
| 32 | /* a directory, so open handle */ |
| 33 | dir = opendir(name); |
| 34 | if (dir == NULL) |
| 35 | return -1; |
| 36 | |
| 37 | /* recurse over components */ |
| 38 | errno = 0; |
| 39 | while ((de = readdir(dir)) != NULL) { |
| 40 | char dn[PATH_MAX]; |
| 41 | if (!strcmp(de->d_name, "..") || !strcmp(de->d_name, ".")) |
| 42 | continue; |
| 43 | sprintf(dn, "%s/%s", name, de->d_name); |
| 44 | if (unlink_recursive(dn) < 0) { |
| 45 | fail = 1; |
| 46 | break; |
| 47 | } |
| 48 | errno = 0; |
| 49 | } |
| 50 | /* in case readdir or unlink_recursive failed */ |
| 51 | if (fail || errno < 0) { |
| 52 | int save = errno; |
| 53 | closedir(dir); |
| 54 | errno = save; |
| 55 | return -1; |
| 56 | } |
| 57 | |
| 58 | /* close directory handle */ |
| 59 | if (closedir(dir) < 0) |
| 60 | return -1; |
| 61 | |
| 62 | /* delete target directory */ |
| 63 | return rmdir(name); |
| 64 | } |
| 65 | |
| 66 | int rm_main(int argc, char *argv[]) |
| 67 | { |
| 68 | int ret; |
| 69 | int i = 1; |
| 70 | int recursive = 0; |
| 71 | |
| 72 | if (argc < 2) |
| 73 | return usage(); |
| 74 | |
| 75 | /* check if recursive */ |
| 76 | if (argc >=2 && (!strcmp(argv[1], "-r") || !strcmp(argv[1], "-R"))) { |
| 77 | recursive = 1; |
| 78 | i = 2; |
| 79 | } |
| 80 | |
| 81 | /* loop over the file/directory args */ |
| 82 | for (; i < argc; i++) { |
| 83 | int ret = recursive ? unlink_recursive(argv[i]) : unlink(argv[i]); |
| 84 | if (ret < 0) { |
| 85 | fprintf(stderr, "rm failed for %s, %s\n", argv[i], strerror(errno)); |
| 86 | return -1; |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | return 0; |
| 91 | } |
| 92 | |