1 /* $OpenBSD: options.c,v 1.115 2024/05/10 20:28:31 millert Exp $ */
2 /* $NetBSD: options.c,v 1.6 1996/03/26 23:54:18 mrg Exp $ */
3
4 /*-
5 * Copyright (c) 1992 Keith Muller.
6 * Copyright (c) 1992, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * Keith Muller of the University of California, San Diego.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #include <sys/types.h>
38 #include <sys/stat.h>
39 #include <errno.h>
40 #include <limits.h>
41 #include <paths.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46
47 #include "pax.h"
48 #include "cpio.h"
49 #include "tar.h"
50 #include "extern.h"
51
52 static int bad_opt(void);
53 static int opt_add(const char *);
54 /*
55 * argv[0] names. Used for tar and cpio emulation
56 */
57
58 #define NM_TAR "tar"
59 #define NM_CPIO "cpio"
60 #define NM_PAX "pax"
61
62 /*
63 * Constants used to specify the legal sets of flags in pax. For each major
64 * operation mode of pax, a set of illegal flags is defined. If any one of
65 * those illegal flags are found set, we scream and exit
66 */
67
68 /*
69 * flags (one for each option).
70 */
71 #define AF 0x00000001
72 #define BF 0x00000002
73 #define CF 0x00000004
74 #define DF 0x00000008
75 #define FF 0x00000010
76 #define IF 0x00000020
77 #define KF 0x00000040
78 #define LF 0x00000080
79 #define NF 0x00000100
80 #define OF 0x00000200
81 #define PF 0x00000400
82 #define RF 0x00000800
83 #define SF 0x00001000
84 #define TF 0x00002000
85 #define UF 0x00004000
86 #define VF 0x00008000
87 #define WF 0x00010000
88 #define XF 0x00020000
89 #define CBF 0x00040000 /* nonstandard extension */
90 #define CDF 0x00080000 /* nonstandard extension */
91 #define CEF 0x00100000 /* nonstandard extension */
92 #define CGF 0x00200000 /* nonstandard extension */
93 #define CHF 0x00400000 /* nonstandard extension */
94 #define CLF 0x00800000 /* nonstandard extension */
95 #define CPF 0x01000000 /* nonstandard extension */
96 #define CTF 0x02000000 /* nonstandard extension */
97 #define CUF 0x04000000 /* nonstandard extension */
98 #define CXF 0x08000000
99 #define CYF 0x10000000 /* nonstandard extension */
100 #define CZF 0x20000000 /* nonstandard extension */
101 #define C0F 0x40000000 /* nonstandard extension */
102
103 /*
104 * ascii string indexed by bit position above (alter the above and you must
105 * alter this string) used to tell the user what flags caused us to complain
106 */
107 #define FLGCH "abcdfiklnoprstuvwxBDEGHLPTUXYZ0"
108
109 /*
110 * legal pax operation bit patterns
111 */
112
113 #define ISLIST(x) (((x) & (RF|WF)) == 0)
114 #define ISEXTRACT(x) (((x) & (RF|WF)) == RF)
115 #define ISARCHIVE(x) (((x) & (AF|RF|WF)) == WF)
116 #define ISAPPND(x) (((x) & (AF|RF|WF)) == (AF|WF))
117 #define ISCOPY(x) (((x) & (RF|WF)) == (RF|WF))
118 #define ISWRITE(x) (((x) & (RF|WF)) == WF)
119
120 /*
121 * Illegal option flag subsets based on pax operation
122 */
123
124 #define BDEXTR (AF|BF|LF|TF|WF|XF|CBF|CHF|CLF|CPF|CXF)
125 #define BDARCH (CF|KF|LF|NF|PF|RF|CDF|CEF|CYF|CZF)
126 #define BDCOPY (AF|BF|FF|OF|XF|CBF|CEF)
127 #define BDLIST (AF|BF|IF|KF|LF|OF|PF|RF|TF|UF|WF|XF|CBF|CDF|CHF|CLF|CPF|CXF|CYF|CZF)
128
129
130 /*
131 * Routines which handle command line options
132 */
133
134 static char flgch[] = FLGCH; /* list of all possible flags */
135 static OPLIST *ophead = NULL; /* head for format specific options -x */
136 static OPLIST *optail = NULL; /* option tail */
137
138 static int no_op(void);
139 static void printflg(unsigned int);
140 static off_t str_offt(char *);
141 static char *get_line(FILE *fp);
142 static void pax_options(int, char **);
143 static void pax_usage(void);
144 static void tar_options(int, char **);
145 static void tar_usage(void);
146 #ifndef NOCPIO
147 static void cpio_options(int, char **);
148 static void cpio_usage(void);
149 #endif
150
151 static int compress_id(char *_blk, int _size);
152 static int gzip_id(char *_blk, int _size);
153 static int bzip2_id(char *_blk, int _size);
154 static int xz_id(char *_blk, int _size);
155
156 #define GZIP_CMD "gzip" /* command to run as gzip */
157 #define COMPRESS_CMD "compress" /* command to run as compress */
158 #define BZIP2_CMD "bzip2" /* command to run as bzip2 */
159
160 /*
161 * Format specific routine table
162 * (see pax.h for description of each function)
163 *
164 * name, blksz, hdsz, udev, hlk, blkagn, inhead, id, st_read,
165 * read, end_read, st_write, write, end_write, trail,
166 * rd_data, wr_data, options
167 */
168
169 FSUB fsub[] = {
170 #ifdef NOCPIO
171 /* 0: OLD BINARY CPIO */
172 { },
173 /* 1: OLD OCTAL CHARACTER CPIO */
174 { },
175 /* 2: SVR4 HEX CPIO */
176 { },
177 /* 3: SVR4 HEX CPIO WITH CRC */
178 { },
179 #else
180 /* 0: OLD BINARY CPIO */
181 {"bcpio", 5120, sizeof(HD_BCPIO), 1, 0, 0, 1, bcpio_id, cpio_strd,
182 bcpio_rd, bcpio_endrd, cpio_stwr, bcpio_wr, cpio_endwr, cpio_trail,
183 bad_opt},
184
185 /* 1: OLD OCTAL CHARACTER CPIO */
186 {"cpio", 5120, sizeof(HD_CPIO), 1, 0, 0, 1, cpio_id, cpio_strd,
187 cpio_rd, cpio_endrd, cpio_stwr, cpio_wr, cpio_endwr, cpio_trail,
188 bad_opt},
189
190 /* 2: SVR4 HEX CPIO */
191 {"sv4cpio", 5120, sizeof(HD_VCPIO), 1, 0, 0, 1, vcpio_id, cpio_strd,
192 vcpio_rd, vcpio_endrd, cpio_stwr, vcpio_wr, cpio_endwr, cpio_trail,
193 bad_opt},
194
195 /* 3: SVR4 HEX CPIO WITH CRC */
196 {"sv4crc", 5120, sizeof(HD_VCPIO), 1, 0, 0, 1, crc_id, crc_strd,
197 vcpio_rd, vcpio_endrd, crc_stwr, vcpio_wr, cpio_endwr, cpio_trail,
198 bad_opt},
199 #endif
200 /* 4: OLD TAR */
201 {"tar", 10240, BLKMULT, 0, 1, BLKMULT, 0, tar_id, no_op,
202 tar_rd, tar_endrd, no_op, tar_wr, tar_endwr, tar_trail,
203 tar_opt},
204
205 /* 5: POSIX USTAR */
206 {"ustar", 10240, BLKMULT, 0, 1, BLKMULT, 0, ustar_id, no_op,
207 ustar_rd, tar_endrd, no_op, ustar_wr, tar_endwr, tar_trail,
208 tar_opt},
209
210 #ifdef SMALL
211 /* 6: compress, to detect failure to use -Z */
212 { },
213 /* 7: xz, to detect failure to decompress it */
214 { },
215 /* 8: bzip2, to detect failure to use -j */
216 { },
217 /* 9: gzip, to detect failure to use -z */
218 { },
219 /* 10: POSIX PAX */
220 { },
221 #else
222 /* 6: compress, to detect failure to use -Z */
223 {NULL, 0, 4, 0, 0, 0, 0, compress_id},
224 /* 7: xz, to detect failure to decompress it */
225 {NULL, 0, 4, 0, 0, 0, 0, xz_id},
226 /* 8: bzip2, to detect failure to use -j */
227 {NULL, 0, 4, 0, 0, 0, 0, bzip2_id},
228 /* 9: gzip, to detect failure to use -z */
229 {NULL, 0, 4, 0, 0, 0, 0, gzip_id},
230 /* 10: POSIX PAX */
231 {"pax", 5120, BLKMULT, 0, 1, BLKMULT, 0, pax_id, no_op,
232 ustar_rd, tar_endrd, no_op, pax_wr, tar_endwr, tar_trail,
233 pax_opt},
234 #endif
235 };
236 #define F_OCPIO 0 /* format when called as cpio -6 */
237 #define F_ACPIO 1 /* format when called as cpio -c */
238 #define F_CPIO 3 /* format when called as cpio */
239 #define F_OTAR 4 /* format when called as tar -o */
240 #ifdef SMALL
241 # define F_TAR 5 /* default write format when called as tar: ustar */
242 # define DEFLT 5 /* default write format when called as pax: ustar */
243 #else
244 # define F_TAR 10 /* default write format when called as tar: pax */
245 # define DEFLT 10 /* default write format when called as pax: pax */
246 #endif
247
248 /*
249 * ford is the archive search order used by get_arc() to determine what kind
250 * of archive we are dealing with. This helps to properly id archive formats
251 * some formats may be subsets of others....
252 */
253 int ford[] = {10, 5, 4, 9, 8, 7, 6, 3, 2, 1, 0, -1};
254
255 /*
256 * Do we have -C anywhere and what is it?
257 */
258 int havechd = 0;
259 char *chdname = NULL;
260
261 /*
262 * options()
263 * figure out if we are pax, tar or cpio. Call the appropriate options
264 * parser
265 */
266
267 void
options(int argc,char ** argv)268 options(int argc, char **argv)
269 {
270 extern char *__progname;
271
272 /*
273 * Are we acting like pax, tar or cpio (based on argv[0])
274 */
275 argv0 = __progname;
276
277 if (strcmp(NM_TAR, argv0) == 0) {
278 op_mode = OP_TAR;
279 tar_options(argc, argv);
280 #ifndef NOCPIO
281 } else if (strcmp(NM_CPIO, argv0) == 0) {
282 op_mode = OP_CPIO;
283 cpio_options(argc, argv);
284 #endif /* !NOCPIO */
285 } else {
286 argv0 = NM_PAX;
287 op_mode = OP_PAX;
288 pax_options(argc, argv);
289 }
290
291 /* Line-buffer the file list output as needed. */
292 if (listf != stderr)
293 setvbuf(listf, NULL, _IOLBF, 0);
294 }
295
296 /*
297 * pax_options()
298 * look at the user specified flags. set globals as required and check if
299 * the user specified a legal set of flags. If not, complain and exit
300 */
301
302 static void
pax_options(int argc,char ** argv)303 pax_options(int argc, char **argv)
304 {
305 int c;
306 unsigned i;
307 unsigned int flg = 0;
308 unsigned int bflg = 0;
309 const char *errstr;
310 char *pt;
311
312 /*
313 * process option flags
314 */
315 while ((c=getopt(argc,argv,"ab:cdf:ijklno:p:rs:tuvwx:zB:DE:G:HLOPT:U:XYZ0"))
316 != -1) {
317 switch (c) {
318 case 'a':
319 /*
320 * append
321 */
322 flg |= AF;
323 break;
324 case 'b':
325 /*
326 * specify blocksize
327 */
328 flg |= BF;
329 if ((wrblksz = (int)str_offt(optarg)) <= 0) {
330 paxwarn(1, "Invalid block size %s", optarg);
331 pax_usage();
332 }
333 break;
334 case 'c':
335 /*
336 * inverse match on patterns
337 */
338 cflag = 1;
339 flg |= CF;
340 break;
341 case 'd':
342 /*
343 * match only dir on extract, not the subtree at dir
344 */
345 dflag = 1;
346 flg |= DF;
347 break;
348 case 'f':
349 /*
350 * filename where the archive is stored
351 */
352 arcname = optarg;
353 flg |= FF;
354 break;
355 case 'i':
356 /*
357 * interactive file rename
358 */
359 iflag = 1;
360 flg |= IF;
361 break;
362 case 'j':
363 /*
364 * use bzip2. Non standard option.
365 */
366 gzip_program = BZIP2_CMD;
367 break;
368 case 'k':
369 /*
370 * do not clobber files that exist
371 */
372 kflag = 1;
373 flg |= KF;
374 break;
375 case 'l':
376 /*
377 * try to link src to dest with copy (-rw)
378 */
379 lflag = 1;
380 flg |= LF;
381 break;
382 case 'n':
383 /*
384 * select first match for a pattern only
385 */
386 nflag = 1;
387 flg |= NF;
388 break;
389 case 'o':
390 /*
391 * pass format specific options
392 */
393 flg |= OF;
394 if (opt_add(optarg) < 0)
395 pax_usage();
396 break;
397 case 'p':
398 /*
399 * specify file characteristic options
400 */
401 for (pt = optarg; *pt != '\0'; ++pt) {
402 switch (*pt) {
403 case 'a':
404 /*
405 * do not preserve access time
406 */
407 patime = 0;
408 break;
409 case 'e':
410 /*
411 * preserve user id, group id, file
412 * mode, access/modification times
413 */
414 pids = 1;
415 pmode = 1;
416 patime = 1;
417 pmtime = 1;
418 break;
419 case 'm':
420 /*
421 * do not preserve modification time
422 */
423 pmtime = 0;
424 break;
425 case 'o':
426 /*
427 * preserve uid/gid
428 */
429 pids = 1;
430 break;
431 case 'p':
432 /*
433 * preserve file mode bits
434 */
435 pmode = 1;
436 break;
437 default:
438 paxwarn(1, "Invalid -p string: %c", *pt);
439 pax_usage();
440 break;
441 }
442 }
443 flg |= PF;
444 break;
445 case 'r':
446 /*
447 * read the archive
448 */
449 flg |= RF;
450 break;
451 case 's':
452 /*
453 * file name substitution name pattern
454 */
455 if (rep_add(optarg) < 0) {
456 pax_usage();
457 break;
458 }
459 flg |= SF;
460 break;
461 case 't':
462 /*
463 * preserve access time on filesystem nodes we read
464 */
465 tflag = 1;
466 flg |= TF;
467 break;
468 case 'u':
469 /*
470 * ignore those older files
471 */
472 uflag = 1;
473 flg |= UF;
474 break;
475 case 'v':
476 /*
477 * verbose operation mode
478 */
479 vflag = 1;
480 flg |= VF;
481 break;
482 case 'w':
483 /*
484 * write an archive
485 */
486 flg |= WF;
487 break;
488 case 'x':
489 /*
490 * specify an archive format on write
491 */
492 for (i = 0; i < sizeof(fsub)/sizeof(FSUB); ++i)
493 if (fsub[i].name != NULL &&
494 strcmp(fsub[i].name, optarg) == 0)
495 break;
496 if (i < sizeof(fsub)/sizeof(FSUB)) {
497 frmt = &fsub[i];
498 flg |= XF;
499 break;
500 }
501 paxwarn(1, "Unknown -x format: %s", optarg);
502 (void)fputs("pax: Known -x formats are:", stderr);
503 for (i = 0; i < (sizeof(fsub)/sizeof(FSUB)); ++i)
504 if (fsub[i].name != NULL)
505 (void)fprintf(stderr, " %s",
506 fsub[i].name);
507 (void)fputs("\n\n", stderr);
508 pax_usage();
509 break;
510 case 'z':
511 /*
512 * use gzip. Non standard option.
513 */
514 gzip_program = GZIP_CMD;
515 break;
516 case 'B':
517 /*
518 * non-standard option on number of bytes written on a
519 * single archive volume.
520 */
521 if ((wrlimit = str_offt(optarg)) <= 0) {
522 paxwarn(1, "Invalid write limit %s", optarg);
523 pax_usage();
524 }
525 if (wrlimit % BLKMULT) {
526 paxwarn(1, "Write limit is not a %d byte multiple",
527 BLKMULT);
528 pax_usage();
529 }
530 flg |= CBF;
531 break;
532 case 'D':
533 /*
534 * On extraction check file inode change time before the
535 * modification of the file name. Non standard option.
536 */
537 Dflag = 1;
538 flg |= CDF;
539 break;
540 case 'E':
541 /*
542 * non-standard limit on read faults
543 * 0 indicates stop after first error, values
544 * indicate a limit
545 */
546 flg |= CEF;
547 maxflt = strtonum(optarg, 0, INT_MAX, &errstr);
548 if (errstr) {
549 paxwarn(1, "Error count value: %s", errstr);
550 pax_usage();
551 }
552 break;
553 case 'G':
554 /*
555 * non-standard option for selecting files within an
556 * archive by group (gid or name)
557 */
558 if (grp_add(optarg) < 0) {
559 pax_usage();
560 break;
561 }
562 flg |= CGF;
563 break;
564 case 'H':
565 /*
566 * follow command line symlinks only
567 */
568 Hflag = 1;
569 flg |= CHF;
570 break;
571 case 'L':
572 /*
573 * follow symlinks
574 */
575 Lflag = 1;
576 flg |= CLF;
577 break;
578 case 'O':
579 /*
580 * Force one volume. Non standard option.
581 */
582 force_one_volume = 1;
583 break;
584 case 'P':
585 /*
586 * do NOT follow symlinks (default)
587 */
588 Lflag = 0;
589 flg |= CPF;
590 break;
591 case 'T':
592 /*
593 * non-standard option for selecting files within an
594 * archive by modification time range (lower,upper)
595 */
596 if (trng_add(optarg) < 0) {
597 pax_usage();
598 break;
599 }
600 flg |= CTF;
601 break;
602 case 'U':
603 /*
604 * non-standard option for selecting files within an
605 * archive by user (uid or name)
606 */
607 if (usr_add(optarg) < 0) {
608 pax_usage();
609 break;
610 }
611 flg |= CUF;
612 break;
613 case 'X':
614 /*
615 * do not pass over mount points in the file system
616 */
617 Xflag = 1;
618 flg |= CXF;
619 break;
620 case 'Y':
621 /*
622 * On extraction check file inode change time after the
623 * modification of the file name. Non standard option.
624 */
625 Yflag = 1;
626 flg |= CYF;
627 break;
628 case 'Z':
629 /*
630 * On extraction check modification time after the
631 * modification of the file name. Non standard option.
632 */
633 Zflag = 1;
634 flg |= CZF;
635 break;
636 case '0':
637 /*
638 * Use \0 as pathname terminator.
639 * (For use with the -print0 option of find(1).)
640 */
641 zeroflag = 1;
642 flg |= C0F;
643 break;
644 default:
645 pax_usage();
646 break;
647 }
648 }
649
650 /*
651 * figure out the operation mode of pax read,write,extract,copy,append
652 * or list. check that we have not been given a bogus set of flags
653 * for the operation mode.
654 */
655 if (ISLIST(flg)) {
656 act = LIST;
657 listf = stdout;
658 bflg = flg & BDLIST;
659 } else if (ISEXTRACT(flg)) {
660 act = EXTRACT;
661 bflg = flg & BDEXTR;
662 } else if (ISARCHIVE(flg)) {
663 act = ARCHIVE;
664 bflg = flg & BDARCH;
665 } else if (ISAPPND(flg)) {
666 act = APPND;
667 bflg = flg & BDARCH;
668 } else if (ISCOPY(flg)) {
669 act = COPY;
670 bflg = flg & BDCOPY;
671 } else
672 pax_usage();
673 if (bflg) {
674 printflg(flg);
675 pax_usage();
676 }
677
678 /*
679 * if we are writing (ARCHIVE) we use the default format if the user
680 * did not specify a format. when we write during an APPEND, we will
681 * adopt the format of the existing archive if none was supplied.
682 */
683 if (!(flg & XF) && (act == ARCHIVE))
684 frmt = &(fsub[DEFLT]);
685
686 /*
687 * process the args as they are interpreted by the operation mode
688 */
689 switch (act) {
690 case LIST:
691 case EXTRACT:
692 for (; optind < argc; optind++)
693 if (pat_add(argv[optind], NULL) < 0)
694 pax_usage();
695 break;
696 case COPY:
697 if (optind >= argc) {
698 paxwarn(0, "Destination directory was not supplied");
699 pax_usage();
700 }
701 --argc;
702 dirptr = argv[argc];
703 /* FALL THROUGH */
704 case ARCHIVE:
705 case APPND:
706 for (; optind < argc; optind++)
707 if (ftree_add(argv[optind], 0) < 0)
708 pax_usage();
709 /*
710 * no read errors allowed on updates/append operation!
711 */
712 maxflt = 0;
713 break;
714 }
715 }
716
717
718 /*
719 * tar_options()
720 * look at the user specified flags. set globals as required and check if
721 * the user specified a legal set of flags. If not, complain and exit
722 */
723
724 static void
tar_options(int argc,char ** argv)725 tar_options(int argc, char **argv)
726 {
727 int c;
728 int nincfiles = 0;
729 int incfiles_max = 0;
730 unsigned int i;
731 unsigned int format = F_TAR;
732 struct incfile {
733 char *file;
734 char *dir;
735 };
736 struct incfile *incfiles = NULL;
737
738 /*
739 * Set default values.
740 */
741 rmleadslash = 1;
742
743 /*
744 * process option flags
745 */
746 while ((c = getoldopt(argc, argv,
747 "b:cef:hjmopqruts:vwxzBC:F:HI:LNOPXZ014578")) != -1) {
748 switch (c) {
749 case 'b':
750 /*
751 * specify blocksize in 512-byte blocks
752 */
753 if ((wrblksz = (int)str_offt(optarg)) <= 0) {
754 paxwarn(1, "Invalid block size %s", optarg);
755 tar_usage();
756 }
757 wrblksz *= 512; /* XXX - check for int oflow */
758 break;
759 case 'c':
760 /*
761 * create an archive
762 */
763 act = ARCHIVE;
764 break;
765 case 'e':
766 /*
767 * stop after first error
768 */
769 maxflt = 0;
770 break;
771 case 'f':
772 /*
773 * filename where the archive is stored
774 */
775 arcname = optarg;
776 break;
777 case 'h':
778 /*
779 * follow symlinks
780 */
781 Lflag = 1;
782 break;
783 case 'j':
784 /*
785 * use bzip2. Non standard option.
786 */
787 gzip_program = BZIP2_CMD;
788 break;
789 case 'm':
790 /*
791 * do not preserve modification time
792 */
793 pmtime = 0;
794 break;
795 case 'O':
796 format = F_OTAR;
797 break;
798 case 'o':
799 format = F_OTAR;
800 tar_nodir = 1;
801 break;
802 case 'p':
803 /*
804 * preserve uid/gid and file mode, regardless of umask
805 */
806 pmode = 1;
807 pids = 1;
808 break;
809 case 'q':
810 /*
811 * select first match for a pattern only
812 */
813 nflag = 1;
814 break;
815 case 'r':
816 case 'u':
817 /*
818 * append to the archive
819 */
820 act = APPND;
821 break;
822 case 's':
823 /*
824 * file name substitution name pattern
825 */
826 if (rep_add(optarg) < 0) {
827 tar_usage();
828 break;
829 }
830 break;
831 case 't':
832 /*
833 * list contents of the tape
834 */
835 act = LIST;
836 break;
837 case 'v':
838 /*
839 * verbose operation mode
840 */
841 vflag++;
842 break;
843 case 'w':
844 /*
845 * interactive file rename
846 */
847 iflag = 1;
848 break;
849 case 'x':
850 /*
851 * extract an archive, preserving mode,
852 * and mtime if possible.
853 */
854 act = EXTRACT;
855 pmtime = 1;
856 break;
857 case 'z':
858 /*
859 * use gzip. Non standard option.
860 */
861 gzip_program = GZIP_CMD;
862 break;
863 case 'B':
864 /*
865 * Nothing to do here, this is pax default
866 */
867 break;
868 case 'C':
869 havechd++;
870 chdname = optarg;
871 break;
872 case 'F':
873 for (i = 0; i < sizeof(fsub)/sizeof(FSUB); ++i)
874 if (fsub[i].name != NULL &&
875 strcmp(fsub[i].name, optarg) == 0)
876 break;
877 if (i < sizeof(fsub)/sizeof(FSUB)) {
878 format = i;
879 break;
880 }
881 paxwarn(1, "Unknown -F format: %s", optarg);
882 (void)fputs("tar: Known -F formats are:", stderr);
883 for (i = 0; i < (sizeof(fsub)/sizeof(FSUB)); ++i)
884 if (fsub[i].name != NULL)
885 (void)fprintf(stderr, " %s",
886 fsub[i].name);
887 (void)fputs("\n\n", stderr);
888 tar_usage();
889 break;
890 case 'H':
891 /*
892 * follow command line symlinks only
893 */
894 Hflag = 1;
895 break;
896 case 'I':
897 if (++nincfiles > incfiles_max) {
898 size_t n = nincfiles + 3;
899 struct incfile *p;
900
901 p = reallocarray(incfiles, n,
902 sizeof(*incfiles));
903 if (p == NULL) {
904 paxwarn(0, "Unable to allocate space "
905 "for option list");
906 exit(1);
907 }
908 incfiles = p;
909 incfiles_max = n;
910 }
911 incfiles[nincfiles - 1].file = optarg;
912 incfiles[nincfiles - 1].dir = chdname;
913 break;
914 case 'L':
915 /*
916 * follow symlinks
917 */
918 Lflag = 1;
919 break;
920 case 'N':
921 /* numeric uid and gid only */
922 Nflag = 1;
923 break;
924 case 'P':
925 /*
926 * do not remove leading '/' from pathnames
927 */
928 rmleadslash = 0;
929 break;
930 case 'X':
931 /*
932 * do not pass over mount points in the file system
933 */
934 Xflag = 1;
935 break;
936 case 'Z':
937 /*
938 * use compress.
939 */
940 gzip_program = COMPRESS_CMD;
941 break;
942 case '0':
943 arcname = DEV_0;
944 break;
945 case '1':
946 arcname = DEV_1;
947 break;
948 case '4':
949 arcname = DEV_4;
950 break;
951 case '5':
952 arcname = DEV_5;
953 break;
954 case '7':
955 arcname = DEV_7;
956 break;
957 case '8':
958 arcname = DEV_8;
959 break;
960 default:
961 tar_usage();
962 break;
963 }
964 }
965 argc -= optind;
966 argv += optind;
967
968 if ((arcname == NULL) || (*arcname == '\0')) {
969 arcname = getenv("TAPE");
970 if ((arcname == NULL) || (*arcname == '\0'))
971 arcname = _PATH_DEFTAPE;
972 }
973 if ((arcname[0] == '-') && (arcname[1]== '\0'))
974 arcname = NULL;
975
976 /*
977 * Traditional tar behaviour: list-like output goes to stdout unless
978 * writing the archive there. (pax uses stderr unless in list mode)
979 */
980 if (act == LIST || act == EXTRACT || arcname != NULL)
981 listf = stdout;
982
983 /* Traditional tar behaviour (pax wants to read file list from stdin) */
984 if ((act == ARCHIVE || act == APPND) && argc == 0 && nincfiles == 0)
985 exit(0);
986
987 /*
988 * process the args as they are interpreted by the operation mode
989 */
990 switch (act) {
991 case LIST:
992 case EXTRACT:
993 default:
994 {
995 int sawpat = 0;
996 char *file, *dir;
997
998 while (nincfiles || *argv != NULL) {
999 /*
1000 * If we queued up any include files,
1001 * pull them in now. Otherwise, check
1002 * for -I and -C positional flags.
1003 * Anything else must be a file to
1004 * extract.
1005 */
1006 if (nincfiles) {
1007 file = incfiles->file;
1008 dir = incfiles->dir;
1009 incfiles++;
1010 nincfiles--;
1011 } else if (strcmp(*argv, "-I") == 0) {
1012 if (*++argv == NULL)
1013 break;
1014 file = *argv++;
1015 dir = chdname;
1016 } else
1017 file = NULL;
1018 if (file != NULL) {
1019 FILE *fp;
1020 char *str;
1021
1022 if (strcmp(file, "-") == 0)
1023 fp = stdin;
1024 else if ((fp = fopen(file, "r")) == NULL) {
1025 syswarn(1, errno,
1026 "Unable to open %s", file);
1027 tar_usage();
1028 }
1029 while ((str = get_line(fp)) != NULL) {
1030 if (pat_add(str, dir) < 0)
1031 tar_usage();
1032 sawpat = 1;
1033 }
1034 if (ferror(fp)) {
1035 syswarn(1, errno,
1036 "Unable to read from %s",
1037 strcmp(file, "-") ? file :
1038 "stdin");
1039 tar_usage();
1040 }
1041 if (strcmp(file, "-") != 0)
1042 fclose(fp);
1043 } else if (strcmp(*argv, "-C") == 0) {
1044 if (*++argv == NULL)
1045 break;
1046 chdname = *argv++;
1047 havechd++;
1048 } else if (pat_add(*argv++, chdname) < 0)
1049 tar_usage();
1050 else
1051 sawpat = 1;
1052 }
1053 /*
1054 * if patterns were added, we are doing chdir()
1055 * on a file-by-file basis, else, just one
1056 * global chdir (if any) after opening input.
1057 */
1058 if (sawpat > 0)
1059 chdname = NULL;
1060 }
1061 break;
1062 case ARCHIVE:
1063 case APPND:
1064 frmt = &fsub[format];
1065
1066 if (chdname != NULL) { /* initial chdir() */
1067 if (ftree_add(chdname, 1) < 0)
1068 tar_usage();
1069 }
1070
1071 while (nincfiles || *argv != NULL) {
1072 char *file, *dir;
1073
1074 /*
1075 * If we queued up any include files, pull them in
1076 * now. Otherwise, check for -I and -C positional
1077 * flags. Anything else must be a file to include
1078 * in the archive.
1079 */
1080 if (nincfiles) {
1081 file = incfiles->file;
1082 dir = incfiles->dir;
1083 incfiles++;
1084 nincfiles--;
1085 } else if (strcmp(*argv, "-I") == 0) {
1086 if (*++argv == NULL)
1087 break;
1088 file = *argv++;
1089 dir = NULL;
1090 } else
1091 file = NULL;
1092 if (file != NULL) {
1093 FILE *fp;
1094 char *str;
1095
1096 /* Set directory if needed */
1097 if (dir) {
1098 if (ftree_add(dir, 1) < 0)
1099 tar_usage();
1100 }
1101
1102 if (strcmp(file, "-") == 0)
1103 fp = stdin;
1104 else if ((fp = fopen(file, "r")) == NULL) {
1105 syswarn(1, errno, "Unable to open %s",
1106 file);
1107 tar_usage();
1108 }
1109 while ((str = get_line(fp)) != NULL) {
1110 if (ftree_add(str, 0) < 0)
1111 tar_usage();
1112 }
1113 if (ferror(fp)) {
1114 syswarn(1, errno,
1115 "Unable to read from %s",
1116 strcmp(file, "-") ? file : "stdin");
1117 tar_usage();
1118 }
1119 if (strcmp(file, "-") != 0)
1120 fclose(fp);
1121 } else if (strcmp(*argv, "-C") == 0) {
1122 if (*++argv == NULL)
1123 break;
1124 if (ftree_add(*argv++, 1) < 0)
1125 tar_usage();
1126 havechd++;
1127 } else if (ftree_add(*argv++, 0) < 0)
1128 tar_usage();
1129 }
1130 /*
1131 * no read errors allowed on updates/append operation!
1132 */
1133 maxflt = 0;
1134 break;
1135 }
1136 }
1137
1138 static int mkpath(char *);
1139
1140 static int
mkpath(char * path)1141 mkpath(char *path)
1142 {
1143 struct stat sb;
1144 char *slash;
1145 int done = 0;
1146
1147 slash = path;
1148
1149 while (!done) {
1150 slash += strspn(slash, "/");
1151 slash += strcspn(slash, "/");
1152
1153 done = (*slash == '\0');
1154 *slash = '\0';
1155
1156 if (stat(path, &sb)) {
1157 if (errno != ENOENT || mkdir(path, 0777)) {
1158 paxwarn(1, "%s", path);
1159 return (-1);
1160 }
1161 } else if (!S_ISDIR(sb.st_mode)) {
1162 syswarn(1, ENOTDIR, "%s", path);
1163 return (-1);
1164 }
1165
1166 if (!done)
1167 *slash = '/';
1168 }
1169
1170 return (0);
1171 }
1172
1173 #ifndef NOCPIO
1174 /*
1175 * cpio_options()
1176 * look at the user specified flags. set globals as required and check if
1177 * the user specified a legal set of flags. If not, complain and exit
1178 */
1179
1180 static void
cpio_options(int argc,char ** argv)1181 cpio_options(int argc, char **argv)
1182 {
1183 const char *errstr;
1184 int c, list_only = 0;
1185 unsigned i;
1186 char *str;
1187 FILE *fp;
1188
1189 kflag = 1;
1190 pids = 1;
1191 pmode = 1;
1192 pmtime = 0;
1193 arcname = NULL;
1194 dflag = 1;
1195 act = -1;
1196 nodirs = 1;
1197 while ((c=getopt(argc,argv,"abcdfijklmoprstuvzABC:E:F:H:I:LO:SZ6")) != -1)
1198 switch (c) {
1199 case 'a':
1200 /*
1201 * preserve access time on files read
1202 */
1203 tflag = 1;
1204 break;
1205 case 'b':
1206 /*
1207 * swap bytes and half-words when reading data
1208 */
1209 break;
1210 case 'c':
1211 /*
1212 * ASCII cpio header
1213 */
1214 frmt = &(fsub[F_ACPIO]);
1215 break;
1216 case 'd':
1217 /*
1218 * create directories as needed
1219 */
1220 nodirs = 0;
1221 break;
1222 case 'f':
1223 /*
1224 * invert meaning of pattern list
1225 */
1226 cflag = 1;
1227 break;
1228 case 'i':
1229 /*
1230 * restore an archive
1231 */
1232 act = EXTRACT;
1233 break;
1234 case 'j':
1235 /*
1236 * use bzip2. Non standard option.
1237 */
1238 gzip_program = BZIP2_CMD;
1239 break;
1240 case 'k':
1241 break;
1242 case 'l':
1243 /*
1244 * use links instead of copies when possible
1245 */
1246 lflag = 1;
1247 break;
1248 case 'm':
1249 /*
1250 * preserve modification time
1251 */
1252 pmtime = 1;
1253 break;
1254 case 'o':
1255 /*
1256 * create an archive
1257 */
1258 act = ARCHIVE;
1259 if (frmt == NULL)
1260 frmt = &(fsub[F_CPIO]);
1261 break;
1262 case 'p':
1263 /*
1264 * copy-pass mode
1265 */
1266 act = COPY;
1267 break;
1268 case 'r':
1269 /*
1270 * interactively rename files
1271 */
1272 iflag = 1;
1273 break;
1274 case 's':
1275 /*
1276 * swap bytes after reading data
1277 */
1278 break;
1279 case 't':
1280 /*
1281 * list contents of archive
1282 */
1283 list_only = 1;
1284 break;
1285 case 'u':
1286 /*
1287 * replace newer files
1288 */
1289 kflag = 0;
1290 break;
1291 case 'v':
1292 /*
1293 * verbose operation mode
1294 */
1295 vflag = 1;
1296 break;
1297 case 'z':
1298 /*
1299 * use gzip. Non standard option.
1300 */
1301 gzip_program = GZIP_CMD;
1302 break;
1303 case 'A':
1304 /*
1305 * append mode
1306 */
1307 act = APPND;
1308 break;
1309 case 'B':
1310 /*
1311 * Use 5120 byte block size
1312 */
1313 wrblksz = 5120;
1314 break;
1315 case 'C':
1316 /*
1317 * set block size in bytes
1318 */
1319 wrblksz = strtonum(optarg, 0, INT_MAX, &errstr);
1320 if (errstr) {
1321 paxwarn(1, "Invalid block size %s: %s",
1322 optarg, errstr);
1323 pax_usage();
1324 }
1325 break;
1326 case 'E':
1327 /*
1328 * file with patterns to extract or list
1329 */
1330 if ((fp = fopen(optarg, "r")) == NULL) {
1331 syswarn(1, errno, "Unable to open %s",
1332 optarg);
1333 cpio_usage();
1334 }
1335 while ((str = get_line(fp)) != NULL) {
1336 pat_add(str, NULL);
1337 }
1338 if (ferror(fp)) {
1339 syswarn(1, errno,
1340 "Unable to read from %s", optarg);
1341 cpio_usage();
1342 }
1343 fclose(fp);
1344 break;
1345 case 'F':
1346 case 'I':
1347 case 'O':
1348 /*
1349 * filename where the archive is stored
1350 */
1351 if ((optarg[0] == '-') && (optarg[1]== '\0')) {
1352 /*
1353 * treat a - as stdin
1354 */
1355 arcname = NULL;
1356 break;
1357 }
1358 arcname = optarg;
1359 break;
1360 case 'H':
1361 /*
1362 * specify an archive format on write
1363 */
1364 for (i = 0; i < sizeof(fsub)/sizeof(FSUB); ++i)
1365 if (fsub[i].name != NULL &&
1366 strcmp(fsub[i].name, optarg) == 0)
1367 break;
1368 if (i < sizeof(fsub)/sizeof(FSUB)) {
1369 frmt = &fsub[i];
1370 break;
1371 }
1372 paxwarn(1, "Unknown -H format: %s", optarg);
1373 (void)fputs("cpio: Known -H formats are:", stderr);
1374 for (i = 0; i < (sizeof(fsub)/sizeof(FSUB)); ++i)
1375 if (fsub[i].name != NULL)
1376 (void)fprintf(stderr, " %s",
1377 fsub[i].name);
1378 (void)fputs("\n\n", stderr);
1379 cpio_usage();
1380 break;
1381 case 'L':
1382 /*
1383 * follow symbolic links
1384 */
1385 Lflag = 1;
1386 break;
1387 case 'S':
1388 /*
1389 * swap halfwords after reading data
1390 */
1391 break;
1392 case 'Z':
1393 /*
1394 * use compress. Non standard option.
1395 */
1396 gzip_program = COMPRESS_CMD;
1397 break;
1398 case '6':
1399 /*
1400 * process Version 6 cpio format
1401 */
1402 frmt = &(fsub[F_OCPIO]);
1403 break;
1404 default:
1405 cpio_usage();
1406 break;
1407 }
1408 argc -= optind;
1409 argv += optind;
1410
1411 /*
1412 * process the args as they are interpreted by the operation mode
1413 */
1414 switch (act) {
1415 case EXTRACT:
1416 if (list_only) {
1417 act = LIST;
1418
1419 /*
1420 * cpio is like pax: list to stderr
1421 * unless in list mode
1422 */
1423 listf = stdout;
1424 }
1425 while (*argv != NULL)
1426 if (pat_add(*argv++, NULL) < 0)
1427 cpio_usage();
1428 break;
1429 case COPY:
1430 if (*argv == NULL) {
1431 paxwarn(0, "Destination directory was not supplied");
1432 cpio_usage();
1433 }
1434 dirptr = *argv;
1435 if (mkpath(dirptr) < 0)
1436 cpio_usage();
1437 --argc;
1438 ++argv;
1439 /* FALL THROUGH */
1440 case ARCHIVE:
1441 case APPND:
1442 if (*argv != NULL)
1443 cpio_usage();
1444 /*
1445 * no read errors allowed on updates/append operation!
1446 */
1447 maxflt = 0;
1448 while ((str = get_line(stdin)) != NULL) {
1449 ftree_add(str, 0);
1450 }
1451 if (ferror(stdin)) {
1452 syswarn(1, errno, "Unable to read from %s",
1453 "stdin");
1454 cpio_usage();
1455 }
1456 break;
1457 default:
1458 cpio_usage();
1459 break;
1460 }
1461 }
1462 #endif /* !NOCPIO */
1463
1464 /*
1465 * printflg()
1466 * print out those invalid flag sets found to the user
1467 */
1468
1469 static void
printflg(unsigned int flg)1470 printflg(unsigned int flg)
1471 {
1472 int nxt;
1473 int pos = 0;
1474
1475 (void)fprintf(stderr,"%s: Invalid combination of options:", argv0);
1476 while ((nxt = ffs(flg)) != 0) {
1477 flg >>= nxt;
1478 pos += nxt;
1479 (void)fprintf(stderr, " -%c", flgch[pos-1]);
1480 }
1481 (void)putc('\n', stderr);
1482 }
1483
1484 /*
1485 * opt_next()
1486 * called by format specific options routines to get each format specific
1487 * flag and value specified with -o
1488 * Return:
1489 * pointer to next OPLIST entry or NULL (end of list).
1490 */
1491
1492 OPLIST *
opt_next(void)1493 opt_next(void)
1494 {
1495 OPLIST *opt;
1496
1497 if ((opt = ophead) != NULL)
1498 ophead = ophead->fow;
1499 return(opt);
1500 }
1501
1502 /*
1503 * bad_opt()
1504 * generic routine used to complain about a format specific options
1505 * when the format does not support options.
1506 */
1507
1508 static int
bad_opt(void)1509 bad_opt(void)
1510 {
1511 OPLIST *opt;
1512
1513 if (ophead == NULL)
1514 return(0);
1515 /*
1516 * print all we were given
1517 */
1518 paxwarn(1,"These format options are not supported");
1519 while ((opt = opt_next()) != NULL)
1520 (void)fprintf(stderr, "\t%s = %s\n", opt->name, opt->value);
1521 pax_usage();
1522 return(0);
1523 }
1524
1525 /*
1526 * opt_add()
1527 * breaks the value supplied to -o into a option name and value. options
1528 * are given to -o in the form -o name-value,name=value
1529 * multiple -o may be specified.
1530 * Return:
1531 * 0 if format in name=value format, -1 if -o is passed junk
1532 */
1533
1534 static int
opt_add(const char * str)1535 opt_add(const char *str)
1536 {
1537 OPLIST *opt;
1538 char *frpt;
1539 char *pt;
1540 char *endpt;
1541 char *dstr;
1542
1543 if ((str == NULL) || (*str == '\0')) {
1544 paxwarn(0, "Invalid option name");
1545 return(-1);
1546 }
1547 if ((dstr = strdup(str)) == NULL) {
1548 paxwarn(0, "Unable to allocate space for option list");
1549 return(-1);
1550 }
1551 frpt = endpt = dstr;
1552
1553 /*
1554 * break into name and values pieces and stuff each one into a
1555 * OPLIST structure. When we know the format, the format specific
1556 * option function will go through this list
1557 */
1558 while ((frpt != NULL) && (*frpt != '\0')) {
1559 if ((endpt = strchr(frpt, ',')) != NULL)
1560 *endpt = '\0';
1561 if ((pt = strchr(frpt, '=')) == NULL) {
1562 paxwarn(0, "Invalid options format");
1563 free(dstr);
1564 return(-1);
1565 }
1566 if ((opt = malloc(sizeof(OPLIST))) == NULL) {
1567 paxwarn(0, "Unable to allocate space for option list");
1568 free(dstr);
1569 return(-1);
1570 }
1571 dstr = NULL; /* parts of string going onto the OPLIST */
1572 *pt++ = '\0';
1573 opt->name = frpt;
1574 opt->value = pt;
1575 opt->fow = NULL;
1576 if (endpt != NULL)
1577 frpt = endpt + 1;
1578 else
1579 frpt = NULL;
1580 if (ophead == NULL) {
1581 optail = ophead = opt;
1582 continue;
1583 }
1584 optail->fow = opt;
1585 optail = opt;
1586 }
1587 free(dstr);
1588 return(0);
1589 }
1590
1591 /*
1592 * str_offt()
1593 * Convert an expression of the following forms to an off_t > 0.
1594 * 1) A positive decimal number.
1595 * 2) A positive decimal number followed by a b (mult by 512).
1596 * 3) A positive decimal number followed by a k (mult by 1024).
1597 * 4) A positive decimal number followed by a m (mult by 512).
1598 * 5) A positive decimal number followed by a w (mult by sizeof int)
1599 * 6) Two or more positive decimal numbers (with/without k,b or w).
1600 * separated by x (also * for backwards compatibility), specifying
1601 * the product of the indicated values.
1602 * Return:
1603 * 0 for an error, a positive value o.w.
1604 */
1605
1606 static off_t
str_offt(char * val)1607 str_offt(char *val)
1608 {
1609 char *expr;
1610 off_t num, t;
1611
1612 num = strtoll(val, &expr, 0);
1613 if ((num == LLONG_MAX) || (num <= 0) || (expr == val))
1614 return(0);
1615
1616 switch (*expr) {
1617 case 'b':
1618 t = num;
1619 num *= 512;
1620 if (t > num)
1621 return(0);
1622 ++expr;
1623 break;
1624 case 'k':
1625 t = num;
1626 num *= 1024;
1627 if (t > num)
1628 return(0);
1629 ++expr;
1630 break;
1631 case 'm':
1632 t = num;
1633 num *= 1048576;
1634 if (t > num)
1635 return(0);
1636 ++expr;
1637 break;
1638 case 'w':
1639 t = num;
1640 num *= sizeof(int);
1641 if (t > num)
1642 return(0);
1643 ++expr;
1644 break;
1645 }
1646
1647 switch (*expr) {
1648 case '\0':
1649 break;
1650 case '*':
1651 case 'x':
1652 t = num;
1653 num *= str_offt(expr + 1);
1654 if (t > num)
1655 return(0);
1656 break;
1657 default:
1658 return(0);
1659 }
1660 return(num);
1661 }
1662
1663 char *
get_line(FILE * f)1664 get_line(FILE *f)
1665 {
1666 char *str = NULL;
1667 size_t size = 0;
1668 ssize_t len;
1669
1670 do {
1671 len = getline(&str, &size, f);
1672 if (len == -1) {
1673 free(str);
1674 return NULL;
1675 }
1676 if (str[len - 1] == '\n')
1677 str[len - 1] = '\0';
1678 } while (str[0] == '\0');
1679 return str;
1680 }
1681
1682 /*
1683 * no_op()
1684 * for those option functions where the archive format has nothing to do.
1685 * Return:
1686 * 0
1687 */
1688
1689 static int
no_op(void)1690 no_op(void)
1691 {
1692 return(0);
1693 }
1694
1695 /*
1696 * pax_usage()
1697 * print the usage summary to the user
1698 */
1699
1700 void
pax_usage(void)1701 pax_usage(void)
1702 {
1703 (void)fputs(
1704 "usage: pax [-0cdjnOvz] [-E limit] [-f archive] [-G group] [-s replstr]\n"
1705 " [-T range] [-U user] [pattern ...]\n"
1706 " pax -r [-0cDdijknOuvYZz] [-E limit] [-f archive] [-G group] [-o options]\n"
1707 " [-p string] [-s replstr] [-T range] [-U user] [pattern ...]\n"
1708 " pax -w [-0adHijLOPtuvXz] [-B bytes] [-b blocksize] [-f archive]\n"
1709 " [-G group] [-o options] [-s replstr] [-T range] [-U user]\n"
1710 " [-x format] [file ...]\n"
1711 " pax -rw [-0DdHikLlnOPtuvXYZ] [-G group] [-p string] [-s replstr]\n"
1712 " [-T range] [-U user] [file ...] directory\n",
1713 stderr);
1714 exit(1);
1715 }
1716
1717 /*
1718 * tar_usage()
1719 * print the usage summary to the user
1720 */
1721
1722 void
tar_usage(void)1723 tar_usage(void)
1724 {
1725 (void)fputs(
1726 "usage: tar {crtux}[014578beFfHhjLmNOoPpqsvwXZz]\n"
1727 " [blocking-factor | format | archive | replstr]\n"
1728 " [-C directory] [-I file] [file ...]\n"
1729 " tar {-crtux} [-014578eHhjLmNOoPpqvwXZz] [-b blocking-factor]\n"
1730 " [-C directory] [-F format] [-f archive] [-I file]\n"
1731 " [-s replstr] [file ...]\n",
1732 stderr);
1733 exit(1);
1734 }
1735
1736 #ifndef NOCPIO
1737 /*
1738 * cpio_usage()
1739 * print the usage summary to the user
1740 */
1741
1742 void
cpio_usage(void)1743 cpio_usage(void)
1744 {
1745 (void)fputs(
1746 "usage: cpio -o [-AaBcjLvZz] [-C bytes] [-F archive] [-H format]\n"
1747 " [-O archive] < name-list [> archive]\n"
1748 " cpio -i [-6BbcdfjmrSstuvZz] [-C bytes] [-E file] [-F archive] [-H format]\n"
1749 " [-I archive] [pattern ...] [< archive]\n"
1750 " cpio -p [-adLlmuv] destination-directory < name-list\n",
1751 stderr);
1752 exit(1);
1753 }
1754 #endif /* !NOCPIO */
1755
1756 #ifndef SMALL
1757 static int
compress_id(char * blk,int size)1758 compress_id(char *blk, int size)
1759 {
1760 if (size >= 2 && blk[0] == '\037' && blk[1] == '\235') {
1761 paxwarn(0, "input compressed with %s; use the -%c option"
1762 " to decompress it", "compress", 'Z');
1763 exit(1);
1764 }
1765 return (-1);
1766 }
1767
1768 static int
gzip_id(char * blk,int size)1769 gzip_id(char *blk, int size)
1770 {
1771 if (size >= 2 && blk[0] == '\037' && blk[1] == '\213') {
1772 paxwarn(0, "input compressed with %s; use the -%c option"
1773 " to decompress it", "gzip", 'z');
1774 exit(1);
1775 }
1776 return (-1);
1777 }
1778
1779 static int
bzip2_id(char * blk,int size)1780 bzip2_id(char *blk, int size)
1781 {
1782 if (size >= 3 && blk[0] == 'B' && blk[1] == 'Z' && blk[2] == 'h') {
1783 paxwarn(0, "input compressed with %s; use the -%c option"
1784 " to decompress it", "bzip2", 'j');
1785 exit(1);
1786 }
1787 return (-1);
1788 }
1789
1790 static int
xz_id(char * blk,int size)1791 xz_id(char *blk, int size)
1792 {
1793 if (size >= 6 && memcmp(blk, "\xFD\x37\x7A\x58\x5A", 6) == 0) {
1794 paxwarn(0, "input compressed with xz");
1795 exit(1);
1796 }
1797 return (-1);
1798 }
1799 #endif /* !SMALL */
1800