1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1992-2012 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Eclipse Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.eclipse.org/org/documents/epl-v10.html * 11 * (with md5 checksum b35adb5213ca9657e911e9befb180842) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * * 20 ***********************************************************************/ 21 #pragma prototyped 22 /* 23 * David Korn 24 * Glenn Fowler 25 * AT&T Research 26 * 27 * chgrp+chown 28 */ 29 30 static const char usage_1[] = 31 "[-?@(#)$Id: chgrp (AT&T Research) 2012-04-20 $\n]" 32 USAGE_LICENSE 33 ; 34 35 static const char usage_grp_1[] = 36 "[+NAME?chgrp - change the group ownership of files]" 37 "[+DESCRIPTION?\bchgrp\b changes the group ownership of each file" 38 " to \agroup\a, which can be either a group name or a numeric" 39 " group id. The user ownership of each file may also be changed to" 40 " \auser\a by prepending \auser\a\b:\b to the group name.]" 41 ; 42 43 static const char usage_own_1[] = 44 "[+NAME?chown - change the ownership of files]" 45 "[+DESCRIPTION?\bchown\b changes the ownership of each file" 46 " to \auser\a, which can be either a user name or a numeric" 47 " user id. The group ownership of each file may also be changed to" 48 " \auser\a by appending \b:\b\agroup\a to the user name.]" 49 ; 50 51 static const char usage_2[] = 52 "[b:before?Only change files with \bctime\b before (less than) the " 53 "\bmtime\b of \afile\a.]:[file]" 54 "[c:changes?Describe only files whose ownership actually changes.]" 55 "[f:quiet|silent?Do not report files whose ownership fails to change.]" 56 "[h|l:symlink?Change the ownership of symbolic links on systems that " 57 "support \blchown\b(2). Implies \b--physical\b.]" 58 "[m:map?The first operand is interpreted as a file that contains a map " 59 "of space separated \afrom_uid:from_gid to_uid:to_gid\a pairs. The " 60 "\auid\a or \agid\a part of each pair may be omitted to mean any \auid\a " 61 "or \agid\a. Ownership of files matching the \afrom\a part of any pair " 62 "is changed to the corresponding \ato\a part of the pair. The matching " 63 "for each file operand is in the order \auid\a:\agid\a, \auid\a:, " 64 ":\agid\a. For a given file, once a \auid\a or \agid\a mapping is " 65 "determined it is not overridden by any subsequent match. Unmatched " 66 "files are silently ignored.]" 67 "[n:show?Show actions but don't execute.]" 68 "[N:numeric?By default numeric user and group id operands are first " 69 "interpreted as names; if no name exists then they are interpreted as " 70 "explicit numeric ids. \b--numeric\b interprets numeric id operands as " 71 "numeric ids.]" 72 "[r:reference?Omit the explicit ownership operand and use the ownership " 73 "of \afile\a instead.]:[file]" 74 "[u:unmapped?Print a diagnostic for each file for which either the " 75 "\auid\a or \agid\a or both were not mapped.]" 76 "[v:verbose?Describe changed permissions of all files.]" 77 "[H:metaphysical?Follow symbolic links for command arguments; otherwise " 78 "don't follow symbolic links when traversing directories.]" 79 "[L:logical|follow?Follow symbolic links when traversing directories.]" 80 "[P:physical|nofollow?Don't follow symbolic links when traversing " 81 "directories.]" 82 "[R:recursive?Recursively change ownership of directories and their " 83 "contents.]" 84 "[X:test?Canonicalize output for testing.]" 85 86 "\n" 87 "\n" 88 ; 89 90 static const char usage_3[] = 91 " file ...\n" 92 "\n" 93 "[+EXIT STATUS?]{" 94 "[+0?All files changed successfully.]" 95 "[+>0?Unable to change ownership of one or more files.]" 96 "}" 97 "[+SEE ALSO?\bchmod\b(1), \bchown\b(2), \btw\b(1), \bgetconf\b(1), \bls\b(1)]" 98 ; 99 100 #if defined(__STDPP__directive) && defined(__STDPP__hide) 101 __STDPP__directive pragma pp:hide lchown 102 #else 103 #define lchown ______lchown 104 #endif 105 106 #include <cmd.h> 107 #include <cdt.h> 108 #include <ls.h> 109 #include <ctype.h> 110 #include <fts_fix.h> 111 112 #ifndef ENOSYS 113 #define ENOSYS EINVAL 114 #endif 115 116 #include "FEATURE/symlink" 117 118 #if defined(__STDPP__directive) && defined(__STDPP__hide) 119 __STDPP__directive pragma pp:nohide lchown 120 #else 121 #undef lchown 122 #endif 123 124 typedef struct Key_s /* uid/gid key */ 125 { 126 int uid; /* uid */ 127 int gid; /* gid */ 128 } Key_t; 129 130 typedef struct Map_s /* uid/gid map */ 131 { 132 Dtlink_t link; /* dictionary link */ 133 Key_t key; /* key */ 134 Key_t to; /* map to these */ 135 } Map_t; 136 137 #define NOID (-1) 138 139 #define OPT_CHOWN 0x0001 /* chown */ 140 #define OPT_FORCE 0x0002 /* ignore errors */ 141 #define OPT_GID 0x0004 /* have gid */ 142 #define OPT_LCHOWN 0x0008 /* lchown */ 143 #define OPT_NUMERIC 0x0010 /* favor numeric ids */ 144 #define OPT_SHOW 0x0020 /* show but don't do */ 145 #define OPT_TEST 0x0040 /* canonicalize output */ 146 #define OPT_UID 0x0080 /* have uid */ 147 #define OPT_UNMAPPED 0x0100 /* unmapped file diagnostic */ 148 #define OPT_VERBOSE 0x0200 /* have uid */ 149 150 extern int lchown(const char*, uid_t, gid_t); 151 152 /* 153 * parse uid and gid from s 154 */ 155 156 static void 157 getids(register char* s, char** e, Key_t* key, int options) 158 { 159 register char* t; 160 register int n; 161 register int m; 162 char* z; 163 char buf[64]; 164 165 key->uid = key->gid = NOID; 166 while (isspace(*s)) 167 s++; 168 for (t = s; (n = *t) && n != ':' && n != '.' && !isspace(n); t++); 169 if (n) 170 { 171 options |= OPT_CHOWN; 172 if ((n = t++ - s) >= sizeof(buf)) 173 n = sizeof(buf) - 1; 174 *((s = (char*)memcpy(buf, s, n)) + n) = 0; 175 } 176 if (options & OPT_CHOWN) 177 { 178 if (*s) 179 { 180 n = (int)strtol(s, &z, 0); 181 if (*z || !(options & OPT_NUMERIC)) 182 { 183 if ((m = struid(s)) != NOID) 184 n = m; 185 else if (*z) 186 error(ERROR_exit(1), "%s: unknown user", s); 187 } 188 key->uid = n; 189 } 190 for (s = t; (n = *t) && !isspace(n); t++); 191 if (n) 192 { 193 if ((n = t++ - s) >= sizeof(buf)) 194 n = sizeof(buf) - 1; 195 *((s = (char*)memcpy(buf, s, n)) + n) = 0; 196 } 197 } 198 if (*s) 199 { 200 n = (int)strtol(s, &z, 0); 201 if (*z || !(options & OPT_NUMERIC)) 202 { 203 if ((m = strgid(s)) != NOID) 204 n = m; 205 else if (*z) 206 error(ERROR_exit(1), "%s: unknown group", s); 207 } 208 key->gid = n; 209 } 210 if (e) 211 *e = t; 212 } 213 214 /* 215 * NOTE: we only use the native lchown() on symlinks just in case 216 * the implementation is a feckless stub 217 */ 218 219 int 220 b_chgrp(int argc, char** argv, Shbltin_t* context) 221 { 222 register int options = 0; 223 register char* s; 224 register Map_t* m; 225 register FTS* fts; 226 register FTSENT*ent; 227 register int i; 228 Dt_t* map = 0; 229 int logical = 1; 230 int flags; 231 int uid; 232 int gid; 233 char* op; 234 char* usage; 235 char* t; 236 Sfio_t* sp; 237 unsigned long before; 238 Dtdisc_t mapdisc; 239 Key_t keys[3]; 240 Key_t key; 241 struct stat st; 242 int (*chownf)(const char*, uid_t, gid_t); 243 244 cmdinit(argc, argv, context, ERROR_CATALOG, ERROR_NOTIFY); 245 flags = fts_flags() | FTS_META | FTS_TOP | FTS_NOPOSTORDER | FTS_NOSEEDOTDIR; 246 before = ~0; 247 if (!(sp = sfstropen())) 248 error(ERROR_SYSTEM|3, "out of space"); 249 sfputr(sp, usage_1, -1); 250 if (error_info.id[2] == 'g') 251 sfputr(sp, usage_grp_1, -1); 252 else 253 { 254 sfputr(sp, usage_own_1, -1); 255 options |= OPT_CHOWN; 256 } 257 sfputr(sp, usage_2, -1); 258 if (options & OPT_CHOWN) 259 sfputr(sp, ERROR_translate(0, 0, 0, "[owner[:group]]"), -1); 260 else 261 sfputr(sp, ERROR_translate(0, 0, 0, "[[owner:]group]"), -1); 262 sfputr(sp, usage_3, -1); 263 if (!(usage = sfstruse(sp))) 264 error(ERROR_SYSTEM|3, "out of space"); 265 for (;;) 266 { 267 switch (optget(argv, usage)) 268 { 269 case 'b': 270 if (stat(opt_info.arg, &st)) 271 error(ERROR_exit(1), "%s: cannot stat", opt_info.arg); 272 before = st.st_mtime; 273 continue; 274 case 'c': 275 case 'v': 276 options |= OPT_VERBOSE; 277 continue; 278 case 'f': 279 options |= OPT_FORCE; 280 continue; 281 case 'h': 282 options |= OPT_LCHOWN; 283 continue; 284 case 'm': 285 memset(&mapdisc, 0, sizeof(mapdisc)); 286 mapdisc.key = offsetof(Map_t, key); 287 mapdisc.size = sizeof(Key_t); 288 if (!(map = dtopen(&mapdisc, Dtset))) 289 error(ERROR_exit(1), "out of space [id map]"); 290 continue; 291 case 'n': 292 options |= OPT_SHOW; 293 continue; 294 case 'N': 295 options |= OPT_NUMERIC; 296 continue; 297 case 'r': 298 if (stat(opt_info.arg, &st)) 299 error(ERROR_exit(1), "%s: cannot stat", opt_info.arg); 300 uid = st.st_uid; 301 gid = st.st_gid; 302 options |= OPT_UID|OPT_GID; 303 continue; 304 case 'u': 305 options |= OPT_UNMAPPED; 306 continue; 307 case 'H': 308 flags |= FTS_META|FTS_PHYSICAL; 309 logical = 0; 310 continue; 311 case 'L': 312 flags &= ~(FTS_META|FTS_PHYSICAL); 313 logical = 0; 314 continue; 315 case 'P': 316 flags &= ~FTS_META; 317 flags |= FTS_PHYSICAL; 318 logical = 0; 319 continue; 320 case 'R': 321 flags &= ~FTS_TOP; 322 logical = 0; 323 continue; 324 case 'X': 325 options |= OPT_TEST; 326 continue; 327 case ':': 328 error(2, "%s", opt_info.arg); 329 continue; 330 case '?': 331 error(ERROR_usage(2), "%s", opt_info.arg); 332 break; 333 } 334 break; 335 } 336 argv += opt_info.index; 337 argc -= opt_info.index; 338 if (error_info.errors || argc < 2) 339 error(ERROR_usage(2), "%s", optusage(NiL)); 340 s = *argv; 341 if (options & OPT_LCHOWN) 342 { 343 flags &= ~FTS_META; 344 flags |= FTS_PHYSICAL; 345 logical = 0; 346 } 347 if (logical) 348 flags &= ~(FTS_META|FTS_PHYSICAL); 349 if (map) 350 { 351 if (streq(s, "-")) 352 sp = sfstdin; 353 else if (!(sp = sfopen(NiL, s, "r"))) 354 error(ERROR_exit(1), "%s: cannot read", s); 355 while (s = sfgetr(sp, '\n', 1)) 356 { 357 getids(s, &t, &key, options); 358 if (!(m = (Map_t*)dtmatch(map, &key))) 359 { 360 if (!(m = (Map_t*)stakalloc(sizeof(Map_t)))) 361 error(ERROR_exit(1), "out of space [id dictionary]"); 362 m->key = key; 363 m->to.uid = m->to.gid = NOID; 364 dtinsert(map, m); 365 } 366 getids(t, NiL, &m->to, options); 367 } 368 if (sp != sfstdin) 369 sfclose(sp); 370 keys[1].gid = keys[2].uid = NOID; 371 } 372 else if (!(options & (OPT_UID|OPT_GID))) 373 { 374 getids(s, NiL, &key, options); 375 if ((uid = key.uid) != NOID) 376 options |= OPT_UID; 377 if ((gid = key.gid) != NOID) 378 options |= OPT_GID; 379 } 380 switch (options & (OPT_UID|OPT_GID)) 381 { 382 case OPT_UID: 383 s = ERROR_translate(0, 0, 0, " owner"); 384 break; 385 case OPT_GID: 386 s = ERROR_translate(0, 0, 0, " group"); 387 break; 388 case OPT_UID|OPT_GID: 389 s = ERROR_translate(0, 0, 0, " owner and group"); 390 break; 391 default: 392 s = ""; 393 break; 394 } 395 if (!(fts = fts_open(argv + 1, flags, NiL))) 396 error(ERROR_system(1), "%s: not found", argv[1]); 397 while (!sh_checksig(context) && (ent = fts_read(fts))) 398 switch (ent->fts_info) 399 { 400 case FTS_SL: 401 case FTS_SLNONE: 402 if (options & OPT_LCHOWN) 403 { 404 #if _lib_lchown 405 chownf = lchown; 406 op = "lchown"; 407 goto commit; 408 #else 409 if (!(options & OPT_FORCE)) 410 { 411 errno = ENOSYS; 412 error(ERROR_system(0), "%s: cannot change symlink owner/group", ent->fts_path); 413 } 414 #endif 415 } 416 break; 417 case FTS_F: 418 case FTS_D: 419 anyway: 420 chownf = chown; 421 op = "chown"; 422 commit: 423 if ((unsigned long)ent->fts_statp->st_ctime >= before) 424 break; 425 if (map) 426 { 427 options &= ~(OPT_UID|OPT_GID); 428 uid = gid = NOID; 429 keys[0].uid = keys[1].uid = ent->fts_statp->st_uid; 430 keys[0].gid = keys[2].gid = ent->fts_statp->st_gid; 431 i = 0; 432 do 433 { 434 if (m = (Map_t*)dtmatch(map, &keys[i])) 435 { 436 if (uid == NOID && m->to.uid != NOID) 437 { 438 uid = m->to.uid; 439 options |= OPT_UID; 440 } 441 if (gid == NOID && m->to.gid != NOID) 442 { 443 gid = m->to.gid; 444 options |= OPT_GID; 445 } 446 } 447 } while (++i < elementsof(keys) && (uid == NOID || gid == NOID)); 448 } 449 else 450 { 451 if (!(options & OPT_UID)) 452 uid = ent->fts_statp->st_uid; 453 if (!(options & OPT_GID)) 454 gid = ent->fts_statp->st_gid; 455 } 456 if ((options & OPT_UNMAPPED) && (uid == NOID || gid == NOID)) 457 { 458 if (uid == NOID && gid == NOID) 459 error(ERROR_warn(0), "%s: uid and gid not mapped", ent->fts_path); 460 else if (uid == NOID) 461 error(ERROR_warn(0), "%s: uid not mapped", ent->fts_path); 462 else 463 error(ERROR_warn(0), "%s: gid not mapped", ent->fts_path); 464 } 465 if (uid != ent->fts_statp->st_uid && uid != NOID || gid != ent->fts_statp->st_gid && gid != NOID) 466 { 467 if (options & (OPT_SHOW|OPT_VERBOSE)) 468 { 469 if (options & OPT_TEST) 470 { 471 ent->fts_statp->st_uid = 0; 472 ent->fts_statp->st_gid = 0; 473 } 474 sfprintf(sfstdout, "%s uid:%05d->%05d gid:%05d->%05d %s\n", op, ent->fts_statp->st_uid, uid, ent->fts_statp->st_gid, gid, ent->fts_path); 475 } 476 if (!(options & OPT_SHOW) && (*chownf)(ent->fts_accpath, uid, gid) && !(options & OPT_FORCE)) 477 error(ERROR_system(0), "%s: cannot change%s", ent->fts_path, s); 478 } 479 break; 480 case FTS_DC: 481 if (!(options & OPT_FORCE)) 482 error(ERROR_warn(0), "%s: directory causes cycle", ent->fts_path); 483 break; 484 case FTS_DNR: 485 if (!(options & OPT_FORCE)) 486 error(ERROR_system(0), "%s: cannot read directory", ent->fts_path); 487 goto anyway; 488 case FTS_DNX: 489 if (!(options & OPT_FORCE)) 490 error(ERROR_system(0), "%s: cannot search directory", ent->fts_path); 491 goto anyway; 492 case FTS_NS: 493 if (!(options & OPT_FORCE)) 494 error(ERROR_system(0), "%s: not found", ent->fts_path); 495 break; 496 } 497 fts_close(fts); 498 if (map) 499 dtclose(map); 500 return error_info.errors != 0; 501 } 502