| 1 | /*- |
| 2 | * Copyright (c) 1990, 1993, 1994 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#) Copyright (c) 1990, 1993, 1994 The Regents of the University of California. All rights reserved. |
| 34 | * @(#)rm.c 8.5 (Berkeley) 4/18/94 |
| 35 | * $FreeBSD: src/bin/rm/rm.c,v 1.29.2.5 2002/07/12 07:25:48 tjr Exp $ |
| 36 | */ |
| 37 | |
| 38 | #include <sys/stat.h> |
| 39 | #include <sys/param.h> |
| 40 | #include <sys/mount.h> |
| 41 | #include <sys/ioctl.h> |
| 42 | |
| 43 | #include <err.h> |
| 44 | #include <errno.h> |
| 45 | #include <fcntl.h> |
| 46 | #include <fts.h> |
| 47 | #include <grp.h> |
| 48 | #include <pwd.h> |
| 49 | #include <signal.h> |
| 50 | #include <stdio.h> |
| 51 | #include <stdlib.h> |
| 52 | #include <string.h> |
| 53 | #include <sysexits.h> |
| 54 | #include <unistd.h> |
| 55 | |
| 56 | static int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok; |
| 57 | static int rflag, Iflag; |
| 58 | static uid_t uid; |
| 59 | volatile sig_atomic_t info; |
| 60 | |
| 61 | static int check(const char *, const char *, struct stat *); |
| 62 | static int check2(char **); |
| 63 | static void checkdot(char **); |
| 64 | static void rm_file(char **); |
| 65 | static int rm_overwrite(const char *, struct stat *); |
| 66 | static void rm_tree(char **); |
| 67 | static void siginfo(int); |
| 68 | static void usage(void); |
| 69 | |
| 70 | /* |
| 71 | * rm -- |
| 72 | * This rm is different from historic rm's, but is expected to match |
| 73 | * POSIX 1003.2 behavior. The most visible difference is that -f |
| 74 | * has two specific effects now, ignore non-existent files and force |
| 75 | * file removal. |
| 76 | */ |
| 77 | int |
| 78 | main(int argc, char *argv[]) |
| 79 | { |
| 80 | int ch; |
| 81 | const char *p; |
| 82 | pid_t tty_pgrp; |
| 83 | |
| 84 | /* |
| 85 | * Test for the special case where the utility is called as |
| 86 | * "unlink", for which the functionality provided is greatly |
| 87 | * simplified. |
| 88 | */ |
| 89 | if ((p = strrchr(argv[0], '/')) == NULL) |
| 90 | p = argv[0]; |
| 91 | else |
| 92 | ++p; |
| 93 | if (strcmp(p, "unlink") == 0) { |
| 94 | while (getopt(argc, argv, "") != -1) |
| 95 | usage(); |
| 96 | argc -= optind; |
| 97 | argv += optind; |
| 98 | if (argc != 1) |
| 99 | usage(); |
| 100 | rm_file(&argv[0]); |
| 101 | exit(eval); |
| 102 | } |
| 103 | |
| 104 | Pflag = rflag = 0; |
| 105 | while ((ch = getopt(argc, argv, "dfiIPRrvW")) != -1) { |
| 106 | switch(ch) { |
| 107 | case 'd': |
| 108 | dflag = 1; |
| 109 | break; |
| 110 | case 'f': |
| 111 | fflag = 1; |
| 112 | iflag = 0; |
| 113 | break; |
| 114 | case 'i': |
| 115 | fflag = 0; |
| 116 | iflag = 1; |
| 117 | break; |
| 118 | case 'I': |
| 119 | /* |
| 120 | * The -I flag is intended to be generally aliasable |
| 121 | * in /etc/csh.cshrc. We apply it only to foreground |
| 122 | * processes. |
| 123 | */ |
| 124 | if (ioctl(0, TIOCGPGRP, &tty_pgrp) == 0) { |
| 125 | if (tty_pgrp == getpgrp()) |
| 126 | Iflag = 1; |
| 127 | } |
| 128 | break; |
| 129 | case 'P': |
| 130 | Pflag = 1; |
| 131 | break; |
| 132 | case 'R': |
| 133 | case 'r': /* Compatibility. */ |
| 134 | rflag = 1; |
| 135 | break; |
| 136 | case 'v': |
| 137 | vflag = 1; |
| 138 | break; |
| 139 | case 'W': |
| 140 | Wflag = 1; |
| 141 | break; |
| 142 | default: |
| 143 | usage(); |
| 144 | } |
| 145 | } |
| 146 | argc -= optind; |
| 147 | argv += optind; |
| 148 | |
| 149 | if (argc < 1) { |
| 150 | if (fflag) |
| 151 | return 0; |
| 152 | usage(); |
| 153 | } |
| 154 | |
| 155 | checkdot(argv); |
| 156 | uid = geteuid(); |
| 157 | |
| 158 | signal(SIGINFO, siginfo); |
| 159 | |
| 160 | if (*argv) { |
| 161 | stdin_ok = isatty(STDIN_FILENO); |
| 162 | |
| 163 | if (Iflag && !iflag) { |
| 164 | if (check2(argv) == 0) |
| 165 | exit (1); |
| 166 | } |
| 167 | if (rflag) |
| 168 | rm_tree(argv); |
| 169 | else |
| 170 | rm_file(argv); |
| 171 | } |
| 172 | |
| 173 | exit (eval); |
| 174 | } |
| 175 | |
| 176 | static void |
| 177 | rm_tree(char **argv) |
| 178 | { |
| 179 | FTS *fts; |
| 180 | FTSENT *p; |
| 181 | int needstat; |
| 182 | int flags; |
| 183 | int rval; |
| 184 | |
| 185 | /* |
| 186 | * Remove a file hierarchy. If forcing removal (-f), or interactive |
| 187 | * (-i) or can't ask anyway (stdin_ok), don't stat the file. |
| 188 | */ |
| 189 | needstat = !uid || (!fflag && !iflag && stdin_ok); |
| 190 | |
| 191 | /* |
| 192 | * If the -i option is specified, the user can skip on the pre-order |
| 193 | * visit. The fts_number field flags skipped directories. |
| 194 | */ |
| 195 | #define SKIPPED 1 |
| 196 | |
| 197 | flags = FTS_PHYSICAL; |
| 198 | if (!needstat) |
| 199 | flags |= FTS_NOSTAT; |
| 200 | if (Wflag) |
| 201 | flags |= FTS_WHITEOUT; |
| 202 | if ((fts = fts_open(argv, flags, NULL)) == NULL) { |
| 203 | if (fflag && errno == ENOENT) |
| 204 | return; |
| 205 | err(1, NULL); |
| 206 | } |
| 207 | while ((p = fts_read(fts)) != NULL) { |
| 208 | switch (p->fts_info) { |
| 209 | case FTS_DNR: |
| 210 | if (!fflag || p->fts_errno != ENOENT) { |
| 211 | warnx("%s: %s", |
| 212 | p->fts_path, strerror(p->fts_errno)); |
| 213 | eval = 1; |
| 214 | } |
| 215 | continue; |
| 216 | case FTS_ERR: |
| 217 | errx(1, "%s: %s", p->fts_path, strerror(p->fts_errno)); |
| 218 | case FTS_NS: |
| 219 | /* |
| 220 | * Assume that since fts_read() couldn't stat |
| 221 | * the file, it can't be unlinked. |
| 222 | */ |
| 223 | if (!needstat) |
| 224 | break; |
| 225 | if (!fflag || p->fts_errno != ENOENT) { |
| 226 | warnx("%s: %s", |
| 227 | p->fts_path, strerror(p->fts_errno)); |
| 228 | eval = 1; |
| 229 | } |
| 230 | continue; |
| 231 | case FTS_D: |
| 232 | /* Pre-order: give user chance to skip. */ |
| 233 | if (!fflag && !check(p->fts_path, p->fts_accpath, |
| 234 | p->fts_statp)) { |
| 235 | fts_set(fts, p, FTS_SKIP); |
| 236 | p->fts_number = SKIPPED; |
| 237 | } |
| 238 | else if (!uid && |
| 239 | (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) && |
| 240 | !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) && |
| 241 | lchflags(p->fts_accpath, |
| 242 | p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0) |
| 243 | goto err; |
| 244 | continue; |
| 245 | case FTS_DP: |
| 246 | /* Post-order: see if user skipped. */ |
| 247 | if (p->fts_number == SKIPPED) |
| 248 | continue; |
| 249 | break; |
| 250 | default: |
| 251 | if (!fflag && |
| 252 | !check(p->fts_path, p->fts_accpath, p->fts_statp)) |
| 253 | continue; |
| 254 | } |
| 255 | |
| 256 | if (info) { |
| 257 | info = 0; |
| 258 | fprintf(stderr, "Currently removing: %s\n", p->fts_path); |
| 259 | } |
| 260 | |
| 261 | rval = 0; |
| 262 | if (!uid && |
| 263 | (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) && |
| 264 | !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE))) |
| 265 | rval = lchflags(p->fts_accpath, |
| 266 | p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)); |
| 267 | |
| 268 | if (rval == 0) { |
| 269 | /* |
| 270 | * If we can't read or search the directory, may still be |
| 271 | * able to remove it. Don't print out the un{read,search}able |
| 272 | * message unless the remove fails. |
| 273 | */ |
| 274 | switch (p->fts_info) { |
| 275 | case FTS_DP: |
| 276 | case FTS_DNR: |
| 277 | rval = rmdir(p->fts_accpath); |
| 278 | if (rval == 0 || (fflag && errno == ENOENT)) { |
| 279 | if (rval == 0 && vflag) |
| 280 | printf("%s\n", |
| 281 | p->fts_path); |
| 282 | continue; |
| 283 | } |
| 284 | break; |
| 285 | |
| 286 | case FTS_W: |
| 287 | rval = undelete(p->fts_accpath); |
| 288 | if (rval == 0 && (fflag && errno == ENOENT)) { |
| 289 | if (vflag) |
| 290 | printf("%s\n", |
| 291 | p->fts_path); |
| 292 | continue; |
| 293 | } |
| 294 | break; |
| 295 | |
| 296 | case FTS_NS: |
| 297 | /* |
| 298 | * Assume that since fts_read() couldn't stat |
| 299 | * the file, it can't be unlinked. |
| 300 | */ |
| 301 | if (fflag) |
| 302 | continue; |
| 303 | /* FALLTHROUGH */ |
| 304 | default: |
| 305 | if (Pflag) |
| 306 | if (!rm_overwrite(p->fts_accpath, NULL)) |
| 307 | continue; |
| 308 | rval = unlink(p->fts_accpath); |
| 309 | if (rval == 0 || (fflag && errno == ENOENT)) { |
| 310 | if (rval == 0 && vflag) |
| 311 | printf("%s\n", |
| 312 | p->fts_path); |
| 313 | continue; |
| 314 | } |
| 315 | } |
| 316 | } |
| 317 | err: |
| 318 | warn("%s", p->fts_path); |
| 319 | eval = 1; |
| 320 | } |
| 321 | if (errno) |
| 322 | err(1, "fts_read"); |
| 323 | fts_close(fts); |
| 324 | } |
| 325 | |
| 326 | static void |
| 327 | rm_file(char **argv) |
| 328 | { |
| 329 | struct stat sb; |
| 330 | int rval; |
| 331 | const char *f; |
| 332 | |
| 333 | /* |
| 334 | * Remove a file. POSIX 1003.2 states that, by default, attempting |
| 335 | * to remove a directory is an error, so must always stat the file. |
| 336 | */ |
| 337 | while ((f = *argv++) != NULL) { |
| 338 | if (info) { |
| 339 | info = 0; |
| 340 | fprintf(stderr, "Currently removing: %s\n", f); |
| 341 | } |
| 342 | |
| 343 | /* Assume if can't stat the file, can't unlink it. */ |
| 344 | if (lstat(f, &sb)) { |
| 345 | if (Wflag) { |
| 346 | sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR; |
| 347 | } else { |
| 348 | if (!fflag || errno != ENOENT) { |
| 349 | warn("%s", f); |
| 350 | eval = 1; |
| 351 | } |
| 352 | continue; |
| 353 | } |
| 354 | } else if (Wflag) { |
| 355 | warnx("%s: %s", f, strerror(EEXIST)); |
| 356 | eval = 1; |
| 357 | continue; |
| 358 | } |
| 359 | |
| 360 | if (S_ISDIR(sb.st_mode) && !dflag) { |
| 361 | warnx("%s: is a directory", f); |
| 362 | eval = 1; |
| 363 | continue; |
| 364 | } |
| 365 | if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb)) |
| 366 | continue; |
| 367 | rval = 0; |
| 368 | if (!uid && |
| 369 | (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) && |
| 370 | !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE))) |
| 371 | rval = lchflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE)); |
| 372 | if (rval == 0) { |
| 373 | if (S_ISWHT(sb.st_mode)) |
| 374 | rval = undelete(f); |
| 375 | else if (S_ISDIR(sb.st_mode)) |
| 376 | rval = rmdir(f); |
| 377 | else { |
| 378 | if (Pflag) |
| 379 | if (!rm_overwrite(f, &sb)) |
| 380 | continue; |
| 381 | rval = unlink(f); |
| 382 | } |
| 383 | } |
| 384 | if (rval && (!fflag || errno != ENOENT)) { |
| 385 | warn("%s", f); |
| 386 | eval = 1; |
| 387 | } |
| 388 | if (vflag && rval == 0) |
| 389 | printf("%s\n", f); |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | /* |
| 394 | * rm_overwrite -- |
| 395 | * Overwrite the file 3 times with varying bit patterns. |
| 396 | * |
| 397 | * XXX |
| 398 | * This is a cheap way to *really* delete files. Note that only regular |
| 399 | * files are deleted, directories (and therefore names) will remain. |
| 400 | * Also, this assumes a fixed-block filesystem (like FFS, or a V7 or a |
| 401 | * System V filesystem). In a logging filesystem, you'll have to have |
| 402 | * kernel support. |
| 403 | */ |
| 404 | static int |
| 405 | rm_overwrite(const char *file, struct stat *sbp) |
| 406 | { |
| 407 | struct stat sb; |
| 408 | struct statfs fsb; |
| 409 | off_t len; |
| 410 | int bsize, fd, wlen; |
| 411 | char *buf = NULL; |
| 412 | |
| 413 | fd = -1; |
| 414 | if (sbp == NULL) { |
| 415 | if (lstat(file, &sb)) |
| 416 | goto err; |
| 417 | sbp = &sb; |
| 418 | } |
| 419 | if (!S_ISREG(sbp->st_mode)) { |
| 420 | warnx("%s: cannot overwrite a non-regular file", file); |
| 421 | return (1); |
| 422 | } |
| 423 | if (sbp->st_nlink > 1) { |
| 424 | warnx("%s (inode %ju): not overwritten due to multiple links", |
| 425 | file, (uintmax_t)sbp->st_ino); |
| 426 | return (0); |
| 427 | } |
| 428 | if ((fd = open(file, O_WRONLY, 0)) == -1) |
| 429 | goto err; |
| 430 | if (fstatfs(fd, &fsb) == -1) |
| 431 | goto err; |
| 432 | bsize = MAX(fsb.f_iosize, 1024); |
| 433 | if ((buf = malloc(bsize)) == NULL) |
| 434 | err(1, "%s malloc failed", file); |
| 435 | |
| 436 | #define PASS(byte) { \ |
| 437 | memset(buf, byte, bsize); \ |
| 438 | for (len = sbp->st_size; len > 0; len -= wlen) { \ |
| 439 | wlen = len < bsize ? len : bsize; \ |
| 440 | if (write(fd, buf, wlen) != wlen) \ |
| 441 | goto err; \ |
| 442 | } \ |
| 443 | } |
| 444 | PASS(0xff); |
| 445 | if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET)) |
| 446 | goto err; |
| 447 | PASS(0x00); |
| 448 | if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET)) |
| 449 | goto err; |
| 450 | PASS(0xff); |
| 451 | if (!fsync(fd) && !close(fd)) { |
| 452 | free(buf); |
| 453 | return (1); |
| 454 | } |
| 455 | |
| 456 | err: eval = 1; |
| 457 | if (buf) |
| 458 | free(buf); |
| 459 | if (fd != -1) |
| 460 | close(fd); |
| 461 | warn("%s", file); |
| 462 | return (0); |
| 463 | } |
| 464 | |
| 465 | |
| 466 | static int |
| 467 | check(const char *path, const char *name, struct stat *sp) |
| 468 | { |
| 469 | static int perm_answer = -1; |
| 470 | struct choice { |
| 471 | int ch; |
| 472 | const char *str; |
| 473 | int res; |
| 474 | int perm; |
| 475 | } *choice, choices[] = { |
| 476 | { 'y', "yes" , 1, 0 }, |
| 477 | { 'n', "no" , 0, 0 }, |
| 478 | { 'a', "always", 1, 1 }, |
| 479 | { 'v', "never" , 0, 1 }, |
| 480 | { 0, NULL, 0, 0 } |
| 481 | }; |
| 482 | char modep[15], *flagsp; |
| 483 | |
| 484 | if (perm_answer != -1) |
| 485 | return (perm_answer); |
| 486 | |
| 487 | /* Check -i first. */ |
| 488 | if (iflag) |
| 489 | fprintf(stderr, "remove %s? ", path); |
| 490 | else { |
| 491 | /* |
| 492 | * If it's not a symbolic link and it's unwritable and we're |
| 493 | * talking to a terminal, ask. Symbolic links are excluded |
| 494 | * because their permissions are meaningless. Check stdin_ok |
| 495 | * first because we may not have stat'ed the file. |
| 496 | * Also skip this check if the -P option was specified because |
| 497 | * we will not be able to overwrite file contents and will |
| 498 | * barf later. |
| 499 | */ |
| 500 | if (!stdin_ok || S_ISLNK(sp->st_mode) || Pflag || |
| 501 | (!access(name, W_OK) && |
| 502 | !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) && |
| 503 | (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !uid))) |
| 504 | return (1); |
| 505 | strmode(sp->st_mode, modep); |
| 506 | if ((flagsp = fflagstostr(sp->st_flags)) == NULL) |
| 507 | err(1, NULL); |
| 508 | fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ", |
| 509 | modep + 1, modep[9] == ' ' ? "" : " ", |
| 510 | user_from_uid(sp->st_uid, 0), |
| 511 | group_from_gid(sp->st_gid, 0), |
| 512 | *flagsp ? flagsp : "", *flagsp ? " " : "", |
| 513 | path); |
| 514 | free(flagsp); |
| 515 | } |
| 516 | fflush(stderr); |
| 517 | |
| 518 | for (;;) { |
| 519 | size_t len; |
| 520 | char *answer; |
| 521 | |
| 522 | answer = fgetln(stdin, &len); |
| 523 | /* clearerr(stdin); */ |
| 524 | if (answer == NULL) |
| 525 | return (0); |
| 526 | if (answer[len - 1] == '\n') |
| 527 | len--; |
| 528 | if (len == 0) |
| 529 | continue; |
| 530 | |
| 531 | for (choice = choices; choice->str != NULL; choice++) { |
| 532 | if (len == 1 && choice->ch == answer[0]) |
| 533 | goto valid_choice; |
| 534 | if (strncasecmp(answer, choice->str, len) == 0) |
| 535 | goto valid_choice; |
| 536 | } |
| 537 | |
| 538 | fprintf(stderr, "invalid answer, try again (y/n/a/v): "); |
| 539 | } |
| 540 | |
| 541 | valid_choice: |
| 542 | if (choice->perm) |
| 543 | perm_answer = choice->res; |
| 544 | return (choice->res); |
| 545 | } |
| 546 | |
| 547 | static int |
| 548 | check2(char **argv) |
| 549 | { |
| 550 | struct stat st; |
| 551 | int first; |
| 552 | int ch; |
| 553 | int fcount = 0; |
| 554 | int dcount = 0; |
| 555 | int i; |
| 556 | const char *dname = NULL; |
| 557 | |
| 558 | for (i = 0; argv[i]; ++i) { |
| 559 | if (lstat(argv[i], &st) == 0) { |
| 560 | if (S_ISDIR(st.st_mode)) { |
| 561 | ++dcount; |
| 562 | dname = argv[i]; /* only used if 1 dir */ |
| 563 | } else { |
| 564 | ++fcount; |
| 565 | } |
| 566 | } |
| 567 | } |
| 568 | first = 0; |
| 569 | while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') { |
| 570 | if (dcount && rflag) { |
| 571 | fprintf(stderr, "recursively remove"); |
| 572 | if (dcount == 1) |
| 573 | fprintf(stderr, " %s", dname); |
| 574 | else |
| 575 | fprintf(stderr, " %d dirs", dcount); |
| 576 | if (fcount == 1) |
| 577 | fprintf(stderr, " and 1 file"); |
| 578 | else if (fcount > 1) |
| 579 | fprintf(stderr, " and %d files", fcount); |
| 580 | } else if (dcount + fcount > 3) { |
| 581 | fprintf(stderr, "remove %d files", dcount + fcount); |
| 582 | } else { |
| 583 | return(1); |
| 584 | } |
| 585 | fprintf(stderr, "? "); |
| 586 | fflush(stderr); |
| 587 | |
| 588 | first = ch = getchar(); |
| 589 | while (ch != '\n' && ch != EOF) |
| 590 | ch = getchar(); |
| 591 | if (ch == EOF) |
| 592 | break; |
| 593 | } |
| 594 | return (first == 'y' || first == 'Y'); |
| 595 | } |
| 596 | |
| 597 | #define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2]))) |
| 598 | static void |
| 599 | checkdot(char **argv) |
| 600 | { |
| 601 | char *p, **save, **t; |
| 602 | int complained; |
| 603 | |
| 604 | complained = 0; |
| 605 | for (t = argv; *t;) { |
| 606 | if ((p = strrchr(*t, '/')) != NULL) |
| 607 | ++p; |
| 608 | else |
| 609 | p = *t; |
| 610 | if (ISDOT(p)) { |
| 611 | if (!complained++) |
| 612 | warnx("\".\" and \"..\" may not be removed"); |
| 613 | eval = 1; |
| 614 | for (save = t; (t[0] = t[1]) != NULL; ++t) |
| 615 | continue; |
| 616 | t = save; |
| 617 | } else |
| 618 | ++t; |
| 619 | } |
| 620 | } |
| 621 | |
| 622 | static void |
| 623 | usage(void) |
| 624 | { |
| 625 | |
| 626 | fprintf(stderr, "%s\n%s\n", |
| 627 | "usage: rm [-f | -i] [-dIPRrvW] file ...", |
| 628 | " unlink file"); |
| 629 | exit(EX_USAGE); |
| 630 | } |
| 631 | |
| 632 | static void |
| 633 | siginfo(int notused __unused) |
| 634 | { |
| 635 | info = 1; |
| 636 | } |