The Android Open Source Project | dd7bc33 | 2009-03-03 19:32:55 -0800 | [diff] [blame] | 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <string.h> |
| 4 | #include <sys/types.h> |
| 5 | #include <dirent.h> |
| 6 | #include <errno.h> |
| 7 | |
| 8 | #include <sys/stat.h> |
| 9 | #include <unistd.h> |
| 10 | #include <time.h> |
| 11 | |
| 12 | #include <pwd.h> |
| 13 | #include <grp.h> |
| 14 | |
| 15 | #include <linux/kdev_t.h> |
| 16 | |
| 17 | // bits for flags argument |
| 18 | #define LIST_LONG (1 << 0) |
| 19 | #define LIST_ALL (1 << 1) |
| 20 | #define LIST_RECURSIVE (1 << 2) |
| 21 | |
| 22 | // fwd |
| 23 | static int listpath(const char *name, int flags); |
| 24 | |
| 25 | static char mode2kind(unsigned mode) |
| 26 | { |
| 27 | switch(mode & S_IFMT){ |
| 28 | case S_IFSOCK: return 's'; |
| 29 | case S_IFLNK: return 'l'; |
| 30 | case S_IFREG: return '-'; |
| 31 | case S_IFDIR: return 'd'; |
| 32 | case S_IFBLK: return 'b'; |
| 33 | case S_IFCHR: return 'c'; |
| 34 | case S_IFIFO: return 'p'; |
| 35 | default: return '?'; |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | static void mode2str(unsigned mode, char *out) |
| 40 | { |
| 41 | *out++ = mode2kind(mode); |
| 42 | |
| 43 | *out++ = (mode & 0400) ? 'r' : '-'; |
| 44 | *out++ = (mode & 0200) ? 'w' : '-'; |
| 45 | if(mode & 04000) { |
| 46 | *out++ = (mode & 0100) ? 's' : 'S'; |
| 47 | } else { |
| 48 | *out++ = (mode & 0100) ? 'x' : '-'; |
| 49 | } |
| 50 | *out++ = (mode & 040) ? 'r' : '-'; |
| 51 | *out++ = (mode & 020) ? 'w' : '-'; |
| 52 | if(mode & 02000) { |
| 53 | *out++ = (mode & 010) ? 's' : 'S'; |
| 54 | } else { |
| 55 | *out++ = (mode & 010) ? 'x' : '-'; |
| 56 | } |
| 57 | *out++ = (mode & 04) ? 'r' : '-'; |
| 58 | *out++ = (mode & 02) ? 'w' : '-'; |
| 59 | if(mode & 01000) { |
| 60 | *out++ = (mode & 01) ? 't' : 'T'; |
| 61 | } else { |
| 62 | *out++ = (mode & 01) ? 'x' : '-'; |
| 63 | } |
| 64 | *out = 0; |
| 65 | } |
| 66 | |
| 67 | static void user2str(unsigned uid, char *out) |
| 68 | { |
| 69 | struct passwd *pw = getpwuid(uid); |
| 70 | if(pw) { |
| 71 | strcpy(out, pw->pw_name); |
| 72 | } else { |
| 73 | sprintf(out, "%d", uid); |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | static void group2str(unsigned gid, char *out) |
| 78 | { |
| 79 | struct group *gr = getgrgid(gid); |
| 80 | if(gr) { |
| 81 | strcpy(out, gr->gr_name); |
| 82 | } else { |
| 83 | sprintf(out, "%d", gid); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | static int listfile(const char *path, int flags) |
| 88 | { |
| 89 | struct stat s; |
| 90 | char date[32]; |
| 91 | char mode[16]; |
| 92 | char user[16]; |
| 93 | char group[16]; |
| 94 | const char *name; |
| 95 | |
| 96 | /* name is anything after the final '/', or the whole path if none*/ |
| 97 | name = strrchr(path, '/'); |
| 98 | if(name == 0) { |
| 99 | name = path; |
| 100 | } else { |
| 101 | name++; |
| 102 | } |
| 103 | |
| 104 | if(lstat(path, &s) < 0) { |
| 105 | return -1; |
| 106 | } |
| 107 | |
| 108 | mode2str(s.st_mode, mode); |
| 109 | user2str(s.st_uid, user); |
| 110 | group2str(s.st_gid, group); |
| 111 | |
| 112 | strftime(date, 32, "%Y-%m-%d %H:%M", localtime((const time_t*)&s.st_mtime)); |
| 113 | date[31] = 0; |
| 114 | |
| 115 | // 12345678901234567890123456789012345678901234567890123456789012345678901234567890 |
| 116 | // MMMMMMMM UUUUUUUU GGGGGGGGG XXXXXXXX YYYY-MM-DD HH:MM NAME (->LINK) |
| 117 | |
| 118 | switch(s.st_mode & S_IFMT) { |
| 119 | case S_IFBLK: |
| 120 | case S_IFCHR: |
| 121 | printf("%s %-8s %-8s %3d, %3d %s %s\n", |
| 122 | mode, user, group, |
| 123 | (int) MAJOR(s.st_rdev), (int) MINOR(s.st_rdev), |
| 124 | date, name); |
| 125 | break; |
| 126 | case S_IFREG: |
| 127 | printf("%s %-8s %-8s %8d %s %s\n", |
| 128 | mode, user, group, (int) s.st_size, date, name); |
| 129 | break; |
| 130 | case S_IFLNK: { |
| 131 | char linkto[256]; |
| 132 | int len; |
| 133 | |
| 134 | len = readlink(path, linkto, 256); |
| 135 | if(len < 0) return -1; |
| 136 | |
| 137 | if(len > 255) { |
| 138 | linkto[252] = '.'; |
| 139 | linkto[253] = '.'; |
| 140 | linkto[254] = '.'; |
| 141 | linkto[255] = 0; |
| 142 | } else { |
| 143 | linkto[len] = 0; |
| 144 | } |
| 145 | |
| 146 | printf("%s %-8s %-8s %s %s -> %s\n", |
| 147 | mode, user, group, date, name, linkto); |
| 148 | break; |
| 149 | } |
| 150 | default: |
| 151 | printf("%s %-8s %-8s %s %s\n", |
| 152 | mode, user, group, date, name); |
| 153 | |
| 154 | } |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | static int listdir(const char *name, int flags) |
| 159 | { |
| 160 | char tmp[4096]; |
| 161 | DIR *d; |
| 162 | struct dirent *de; |
| 163 | |
| 164 | d = opendir(name); |
| 165 | if(d == 0) { |
| 166 | fprintf(stderr, "opendir failed, %s\n", strerror(errno)); |
| 167 | return -1; |
| 168 | } |
| 169 | |
| 170 | while((de = readdir(d)) != 0){ |
| 171 | if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) continue; |
| 172 | if(de->d_name[0] == '.' && (flags & LIST_ALL) == 0) continue; |
| 173 | if ((flags & LIST_LONG) != 0) { |
| 174 | sprintf(tmp, "%s/%s", name, de->d_name); |
| 175 | listfile(tmp, flags); |
| 176 | } else { |
| 177 | printf("%s\n", de->d_name); |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | if (flags & LIST_RECURSIVE) { |
| 182 | rewinddir(d); |
| 183 | |
| 184 | while ((de = readdir(d)) != 0) { |
| 185 | struct stat s; |
| 186 | int err; |
| 187 | |
| 188 | if (!strcmp(de->d_name, ".") || !strcmp(de->d_name, "..")) |
| 189 | continue; |
| 190 | if (de->d_name[0] == '.' && (flags & LIST_ALL) == 0) |
| 191 | continue; |
| 192 | |
| 193 | if (!strcmp(name, "/")) sprintf(tmp, "/%s", de->d_name); |
| 194 | else sprintf(tmp, "%s/%s", name, de->d_name); |
| 195 | |
| 196 | /* |
| 197 | * If the name ends in a '/', use stat() so we treat it like a |
| 198 | * directory even if it's a symlink. |
| 199 | */ |
| 200 | if (tmp[strlen(tmp)-1] == '/') |
| 201 | err = stat(tmp, &s); |
| 202 | else |
| 203 | err = lstat(tmp, &s); |
| 204 | |
| 205 | if (err < 0) { |
| 206 | perror(tmp); |
| 207 | closedir(d); |
| 208 | return -1; |
| 209 | } |
| 210 | |
| 211 | if (S_ISDIR(s.st_mode)) { |
| 212 | printf("\n%s:\n", tmp); |
| 213 | listdir(tmp, flags); |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | closedir(d); |
| 219 | return 0; |
| 220 | } |
| 221 | |
| 222 | static int listpath(const char *name, int flags) |
| 223 | { |
| 224 | struct stat s; |
| 225 | int err; |
| 226 | |
| 227 | /* |
| 228 | * If the name ends in a '/', use stat() so we treat it like a |
| 229 | * directory even if it's a symlink. |
| 230 | */ |
| 231 | if (name[strlen(name)-1] == '/') |
| 232 | err = stat(name, &s); |
| 233 | else |
| 234 | err = lstat(name, &s); |
| 235 | |
| 236 | if (err < 0) { |
| 237 | perror(name); |
| 238 | return -1; |
| 239 | } |
| 240 | |
| 241 | if (S_ISDIR(s.st_mode)) { |
| 242 | if (flags & LIST_RECURSIVE) |
| 243 | printf("\n%s:\n", name); |
| 244 | return listdir(name, flags); |
| 245 | } else { |
| 246 | if ((flags & LIST_LONG) != 0) { |
| 247 | /* yeah this calls stat() again*/ |
| 248 | return listfile(name, flags); |
| 249 | } else { |
| 250 | printf("%s\n", name); |
| 251 | return 0; |
| 252 | } |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | int ls_main(int argc, char **argv) |
| 257 | { |
| 258 | int flags = 0; |
| 259 | int listed = 0; |
| 260 | |
| 261 | if(argc > 1) { |
| 262 | int i; |
| 263 | int err = 0; |
| 264 | |
| 265 | for (i = 1; i < argc; i++) { |
| 266 | if(!strcmp(argv[i], "-l")) { |
| 267 | flags |= LIST_LONG; |
| 268 | } else if (!strcmp(argv[i], "-a")) { |
| 269 | flags |= LIST_ALL; |
| 270 | } else if (!strcmp(argv[i], "-R")) { |
| 271 | flags |= LIST_RECURSIVE; |
| 272 | } else { |
| 273 | listed++; |
| 274 | if(listpath(argv[i], flags) != 0) { |
| 275 | err = EXIT_FAILURE; |
| 276 | } |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | if (listed > 0) return err; |
| 281 | } |
| 282 | |
| 283 | // list working directory if no files or directories were specified |
| 284 | return listpath(".", flags); |
| 285 | } |