summaryrefslogtreecommitdiff
path: root/src/install.c
blob: 696b189067154b03702586d18a887444c1b2a40f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
/* install - copy files and set attributes
   Copyright (C) 89, 90, 91, 1995-2000 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* Copy files and set their permission modes and, if possible,
   their owner and group.  Used similarly to `cp'; typically
   used in Makefiles to copy programs into their destination
   directories.  It can also be used to create the destination
   directories and any leading directories, and to set the final
   directory's modes.  It refuses to copy files onto themselves.

   Options:
   -g, --group=GROUP
	Set the group ownership of the installed file or directory
	to the group ID of GROUP (default is process's current
	group).  GROUP may also be a numeric group ID.

   -m, --mode=MODE
	Set the permission mode for the installed file or directory
	to MODE, which is an octal number (default is u=rwx,g=rx,o=rx).

   -o, --owner=OWNER
	If run as root, set the ownership of the installed file to
	the user ID of OWNER (default is root).  OWNER may also be
	a numeric user ID.

   -c	No effect.  For compatibility with old Unix versions of install.

   -s, --strip
	Strip the symbol tables from installed files.

   -p, --preserve-timestamps
        Retain creation and modification timestamps when installing files.

   -d, --directory
	Create a directory and its leading directories, if they
	do not already exist.  Set the owner, group and mode
	as given on the command line.  Any leading directories
	that are created are also given those attributes.
	This is different from the SunOS 4.0 install, which gives
	directories that it creates the default attributes.

  -D
	Like the -d option, but a file is installed, along with the directory.
	Useful when installing into a new directory, and the install
	process doesn't properly comprehend making directories.

   David MacKenzie <djm@gnu.ai.mit.edu> */

#ifdef _AIX
 #pragma alloca
#endif

#include <config.h>
#include <stdio.h>
#include <getopt.h>
#include <sys/types.h>
#include <pwd.h>
#include <grp.h>

#include "system.h"
#include "backupfile.h"
#include "error.h"
#include "cp-hash.h"
#include "copy.h"
#include "dirname.h"
#include "makepath.h"
#include "modechange.h"
#include "path-concat.h"
#include "quote.h"
#include "xstrtol.h"

/* The official name of this program (e.g., no `g' prefix).  */
#define PROGRAM_NAME "install"

#define AUTHORS "David MacKenzie"

#if HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif

#if HAVE_VALUES_H
# include <values.h>
#endif

struct passwd *getpwnam ();
struct group *getgrnam ();

#ifndef _POSIX_VERSION
uid_t getuid ();
gid_t getgid ();
#endif

#if ! HAVE_ENDGRENT
# define endgrent() ((void) 0)
#endif

#if ! HAVE_ENDPWENT
# define endpwent() ((void) 0)
#endif

/* Initial number of entries in each hash table entry's table of inodes.  */
#define INITIAL_HASH_MODULE 100

/* Initial number of entries in the inode hash table.  */
#define INITIAL_ENTRY_TAB_SIZE 70

/* Number of bytes of a file to copy at a time. */
#define READ_SIZE (32 * 1024)

int full_write ();
int isdir ();

int stat ();

static int change_timestamps PARAMS ((const char *from, const char *to));
static int change_attributes PARAMS ((const char *path));
static int copy_file PARAMS ((const char *from, const char *to,
			      const struct cp_options *x));
static int install_file_to_path PARAMS ((const char *from, const char *to,
					 const struct cp_options *x));
static int install_file_in_dir PARAMS ((const char *from, const char *to_dir,
					const struct cp_options *x));
static int install_file_in_file PARAMS ((const char *from, const char *to,
					 const struct cp_options *x));
static void get_ids PARAMS ((void));
static void strip PARAMS ((const char *path));
void usage PARAMS ((int status));

/* The name this program was run with, for error messages. */
char *program_name;

/* The user name that will own the files, or NULL to make the owner
   the current user ID. */
static char *owner_name;

/* The user ID corresponding to `owner_name'. */
static uid_t owner_id;

/* The group name that will own the files, or NULL to make the group
   the current group ID. */
static char *group_name;

/* The group ID corresponding to `group_name'. */
static gid_t group_id;

/* The permissions to which the files will be set.  The umask has
   no effect. */
static mode_t mode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;

/* If nonzero, strip executable files after copying them. */
static int strip_files;

/* If nonzero, install a directory instead of a regular file. */
static int dir_arg;

static struct option const long_options[] =
{
  {"backup", optional_argument, NULL, 'b'},
  {"directory", no_argument, NULL, 'd'},
  {"group", required_argument, NULL, 'g'},
  {"mode", required_argument, NULL, 'm'},
  {"owner", required_argument, NULL, 'o'},
  {"preserve-timestamps", no_argument, NULL, 'p'},
  {"strip", no_argument, NULL, 's'},
  {"suffix", required_argument, NULL, 'S'},
  {"version-control", required_argument, NULL, 'V'}, /* Deprecated. FIXME. */
  {"verbose", no_argument, NULL, 'v'},
  {GETOPT_HELP_OPTION_DECL},
  {GETOPT_VERSION_OPTION_DECL},
  {NULL, 0, NULL, 0}
};

static void
cp_option_init (struct cp_options *x)
{
  x->copy_as_regular = 1;
  x->dereference = 1;
  x->force = 1;

  /* If unlink fails, try to proceed anyway.  */
  x->failed_unlink_is_fatal = 0;

  x->hard_link = 0;
  x->interactive = 0;
  x->move_mode = 0;
  x->myeuid = geteuid ();
  x->one_file_system = 0;
  x->preserve_owner_and_group = 0;
  x->preserve_chmod_bits = 0;
  x->preserve_timestamps = 0;
  x->require_preserve = 0;
  x->recursive = 0;
  x->sparse_mode = SPARSE_AUTO;
  x->symbolic_link = 0;
  x->backup_type = none;

  /* Create destination files initially writable so we can run strip on them.
     Although GNU strip works fine on read-only files, some others
     would fail.  */
  x->set_mode = 1;
  x->mode = S_IRUSR | S_IWUSR;

  x->umask_kill = 0;
  x->update = 0;
  x->verbose = 0;
  x->xstat = stat;
}

int
main (int argc, char **argv)
{
  int optc;
  int errors = 0;
  const char *symbolic_mode = NULL;
  int make_backups = 0;
  char *backup_suffix_string;
  char *version_control_string = NULL;
  int mkdir_and_install = 0;
  struct cp_options x;
  int n_files;
  char **file;

  program_name = argv[0];
  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  atexit (close_stdout);

  cp_option_init (&x);

  owner_name = NULL;
  group_name = NULL;
  strip_files = 0;
  dir_arg = 0;
  umask (0);

  /* FIXME: consider not calling getenv for SIMPLE_BACKUP_SUFFIX unless
     we'll actually use backup_suffix_string.  */
  backup_suffix_string = getenv ("SIMPLE_BACKUP_SUFFIX");

  while ((optc = getopt_long (argc, argv, "bcsDdg:m:o:pvV:S:", long_options,
			      NULL)) != -1)
    {
      switch (optc)
	{
	case 0:
	  break;

	case 'V':  /* FIXME: this is deprecated.  Remove it in 2001.  */
	  error (0, 0,
		 _("warning: --version-control (-V) is obsolete;  support for\
 it\nwill be removed in some future release.  Use --backup=%s instead."
		   ), optarg);
	  /* Fall through.  */

	case 'b':
	  make_backups = 1;
	  if (optarg)
	    version_control_string = optarg;
	  break;
	case 'c':
	  break;
	case 's':
	  strip_files = 1;
	  break;
	case 'd':
	  dir_arg = 1;
	  break;
	case 'D':
	  mkdir_and_install = 1;
	  break;
	case 'v':
	  x.verbose = 1;
	  break;
	case 'g':
	  group_name = optarg;
	  break;
	case 'm':
	  symbolic_mode = optarg;
	  break;
	case 'o':
	  owner_name = optarg;
	  break;
	case 'p':
	  x.preserve_timestamps = 1;
	  break;
	case 'S':
	  make_backups = 1;
	  backup_suffix_string = optarg;
	  break;
	case_GETOPT_HELP_CHAR;
	case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
	default:
	  usage (1);
	}
    }

  /* Check for invalid combinations of arguments. */
  if (dir_arg && strip_files)
    error (1, 0,
	   _("the strip option may not be used when installing a directory"));

  if (make_backups)
    x.backup_type = xget_version ("backup type", version_control_string);

  n_files = argc - optind;
  file = argv + optind;

  if (n_files == 0 || (n_files == 1 && !dir_arg))
    {
      error (0, 0, _("too few arguments"));
      usage (1);
    }

  if (symbolic_mode)
    {
      struct mode_change *change = mode_compile (symbolic_mode, 0);
      if (change == MODE_INVALID)
	error (1, 0, _("invalid mode %s"), quote (symbolic_mode));
      else if (change == MODE_MEMORY_EXHAUSTED)
	error (1, 0, _("virtual memory exhausted"));
      mode = mode_adjust (0, change);
    }

  get_ids ();

  if (dir_arg)
    {
      int i;
      for (i = 0; i < n_files; i++)
	{
	  errors |=
	    make_path (file[i], mode, mode, owner_id, group_id, 0,
		       (x.verbose ? _("creating directory %s") : NULL));
	}
    }
  else
    {
      /* FIXME: it's a little gross that this initialization is
	 required by copy.c::copy. */
      hash_init (INITIAL_HASH_MODULE, INITIAL_ENTRY_TAB_SIZE);

      if (n_files == 2)
        {
          if (mkdir_and_install)
	    errors = install_file_to_path (file[0], file[1], &x);
	  else if (!isdir (file[1]))
	    errors = install_file_in_file (file[0], file[1], &x);
	  else
	    errors = install_file_in_dir (file[0], file[1], &x);
	}
      else
	{
	  int i;
	  const char *dest = file[n_files - 1];
	  if (!isdir (dest))
	    {
	      error (0, 0,
		     _("installing multiple files, but last argument, %s \
is not a directory"),
		     quote (dest));
	      usage (1);
	    }
	  for (i = 0; i < n_files - 1; i++)
	    {
	      errors |= install_file_in_dir (file[i], dest, &x);
	    }
	}
    }

  exit (errors);
}

/* Copy file FROM onto file TO, creating any missing parent directories of TO.
   Return 0 if successful, 1 if an error occurs */

static int
install_file_to_path (const char *from, const char *to,
		      const struct cp_options *x)
{
  char *dest_dir;
  int fail = 0;

  dest_dir = dir_name (to);

  /* check to make sure this is a path (not install a b ) */
  if (!STREQ (dest_dir, ".")
      && !isdir (dest_dir))
    {
      /* Someone will probably ask for a new option or three to specify
	 owner, group, and permissions for parent directories.  Remember
	 that this option is intended mainly to help installers when the
	 distribution doesn't provide proper install rules.  */
#define DIR_MODE (S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH)
      fail = make_path (dest_dir, DIR_MODE, DIR_MODE, owner_id, group_id, 0,
			(x->verbose ? _("creating directory %s") : NULL));
    }

  if (fail == 0)
    fail = install_file_in_file (from, to, x);

  free (dest_dir);

  return fail;
}

/* Copy file FROM onto file TO and give TO the appropriate
   attributes.
   Return 0 if successful, 1 if an error occurs. */

static int
install_file_in_file (const char *from, const char *to,
		      const struct cp_options *x)
{
  if (copy_file (from, to, x))
    return 1;
  if (strip_files)
    strip (to);
  if (change_attributes (to))
    return 1;
  if (x->preserve_timestamps)
    return change_timestamps (from, to);
  return 0;
}

/* Copy file FROM into directory TO_DIR, keeping its same name,
   and give the copy the appropriate attributes.
   Return 0 if successful, 1 if not. */

static int
install_file_in_dir (const char *from, const char *to_dir,
		     const struct cp_options *x)
{
  const char *from_base;
  char *to;
  int ret;

  from_base = base_name (from);
  to = path_concat (to_dir, from_base, NULL);
  ret = install_file_in_file (from, to, x);
  free (to);
  return ret;
}

/* Copy file FROM onto file TO, creating TO if necessary.
   Return 0 if the copy is successful, 1 if not.  */

static int
copy_file (const char *from, const char *to, const struct cp_options *x)
{
  int fail;
  int nonexistent_dst = 0;
  int copy_into_self;

  /* Allow installing from non-regular files like /dev/null.
     Charles Karney reported that some Sun version of install allows that
     and that sendmail's installation process relies on the behavior.  */
  if (isdir (from))
    {
      error (0, 0, _("%s is a directory"), quote (from));
      return 1;
    }

  fail = copy (from, to, nonexistent_dst, x, &copy_into_self, NULL);

  return fail;
}

/* Set the attributes of file or directory PATH.
   Return 0 if successful, 1 if not. */

static int
change_attributes (const char *path)
{
  int err = 0;

  /* chown must precede chmod because on some systems,
     chown clears the set[ug]id bits for non-superusers,
     resulting in incorrect permissions.
     On System V, users can give away files with chown and then not
     be able to chmod them.  So don't give files away.

     We don't normally ignore errors from chown because the idea of
     the install command is that the file is supposed to end up with
     precisely the attributes that the user specified (or defaulted).
     If the file doesn't end up with the group they asked for, they'll
     want to know.  But AFS returns EPERM when you try to change a
     file's group; thus the kludge.  */

  if (chown (path, owner_id, group_id)
#ifdef AFS
      && errno != EPERM
#endif
      )
    {
      error (0, errno, "cannot change ownership of %s", quote (path));
      err = 1;
    }

  if (!err && chmod (path, mode))
    {
      error (0, errno, "cannot change permissions of %s", quote (path));
      err = 1;
    }

  return err;
}

/* Set the timestamps of file TO to match those of file FROM.
   Return 0 if successful, 1 if not. */

static int
change_timestamps (const char *from, const char *to)
{
  struct stat stb;
  struct utimbuf utb;

  if (stat (from, &stb))
    {
      error (0, errno, _("cannot obtain time stamps for %s"), quote (from));
      return 1;
    }

  /* There's currently no interface to set file timestamps with
     better than 1-second resolution, so discard any fractional
     part of the source timestamp.  */

  utb.actime = stb.st_atime;
  utb.modtime = stb.st_mtime;
  if (utime (to, &utb))
    {
      error (0, errno, _("cannot set time stamps for %s"), quote (to));
      return 1;
    }
  return 0;
}

/* Strip the symbol table from the file PATH.
   We could dig the magic number out of the file first to
   determine whether to strip it, but the header files and
   magic numbers vary so much from system to system that making
   it portable would be very difficult.  Not worth the effort. */

static void
strip (const char *path)
{
  int status;
  pid_t pid = fork ();

  switch (pid)
    {
    case -1:
      error (1, errno, _("cannot fork"));
      break;
    case 0:			/* Child. */
      execlp ("strip", "strip", path, NULL);
      error (1, errno, _("cannot run strip"));
      break;
    default:			/* Parent. */
      /* Parent process. */
      while (pid != wait (&status))	/* Wait for kid to finish. */
	/* Do nothing. */ ;
      if (status)
	error (1, 0, _("strip failed"));
      break;
    }
}

/* Initialize the user and group ownership of the files to install. */

static void
get_ids (void)
{
  struct passwd *pw;
  struct group *gr;

  if (owner_name)
    {
      pw = getpwnam (owner_name);
      if (pw == NULL)
	{
	  long int tmp_long;
	  if (xstrtol (owner_name, NULL, 0, &tmp_long, NULL) != LONGINT_OK
	      || tmp_long < 0 || tmp_long > UID_T_MAX)
	    error (1, 0, _("invalid user %s"), quote (owner_name));
	  owner_id = (uid_t) tmp_long;
	}
      else
	owner_id = pw->pw_uid;
      endpwent ();
    }
  else
    owner_id = (uid_t) -1;

  if (group_name)
    {
      gr = getgrnam (group_name);
      if (gr == NULL)
	{
	  long int tmp_long;
	  if (xstrtol (group_name, NULL, 0, &tmp_long, NULL) != LONGINT_OK
	      || tmp_long < 0 || tmp_long > GID_T_MAX)
	    error (1, 0, _("invalid group %s"), quote (group_name));
	  group_id = (gid_t) tmp_long;
	}
      else
	group_id = gr->gr_gid;
      endgrent ();
    }
  else
    group_id = (gid_t) -1;
}

void
usage (int status)
{
  if (status != 0)
    fprintf (stderr, _("Try `%s --help' for more information.\n"),
	     program_name);
  else
    {
      printf (_("\
Usage: %s [OPTION]... SOURCE DEST           (1st format)\n\
  or:  %s [OPTION]... SOURCE... DIRECTORY   (2nd format)\n\
  or:  %s -d [OPTION]... DIRECTORY...       (3rd format)\n\
"),
	      program_name, program_name, program_name);
      printf (_("\
In the first two formats, copy SOURCE to DEST or multiple SOURCE(s) to\n\
the existing DIRECTORY, while setting permission modes and owner/group.\n\
In the third format, create all components of the given DIRECTORY(ies).\n\
\n\
      --backup[=CONTROL] make a backup of each existing destination file\n\
  -b                  like --backup but does not accept an argument\n\
  -c                  (ignored)\n\
  -d, --directory     treat all arguments as directory names; create all\n\
                        components of the specified directories\n\
  -D                  create all leading components of DEST except the last,\n\
                        then copy SOURCE to DEST;  useful in the 1st format\n\
  -g, --group=GROUP   set group ownership, instead of process' current group\n\
  -m, --mode=MODE     set permission mode (as in chmod), instead of rwxr-xr-x\n\
  -o, --owner=OWNER   set ownership (super-user only)\n\
  -p, --preserve-timestamps   apply access/modification times of SOURCE files\n\
                        to corresponding destination files\n\
  -s, --strip         strip symbol tables, only for 1st and 2nd formats\n\
  -S, --suffix=SUFFIX override the usual backup suffix\n\
  -v, --verbose       print the name of each directory as it is created\n\
      --help          display this help and exit\n\
      --version       output version information and exit\n\
\n\
"));
      printf (_("\
The backup suffix is `~', unless set with --suffix or SIMPLE_BACKUP_SUFFIX.\n\
The version control method may be selected via the --backup option or through\n\
the VERSION_CONTROL environment variable.  Here are the values:\n\
\n\
  none, off       never make backups (even if --backup is given)\n\
  numbered, t     make numbered backups\n\
  existing, nil   numbered if numbered backups exist, simple otherwise\n\
  simple, never   always make simple backups\n\
"));
      puts (_("\nReport bugs to <bug-fileutils@gnu.org>."));
    }
  exit (status);
}