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HardenedBSD/gnu/usr.bin/tar/tar.c
Bruce Evans d1e00e9390 Improve the handling of large minor numbers: 
cpio/copyout.c:
Don't output a file if the major, minor or totality of its rdev would be
truncated.  Print a message about the skipped files to stderr but don't
report the error in the exit status.  cpio's abysmal error handling doesn't
allow continuing after an error, and the rdev checks had to be misplaced
to avoid the problem of returning an error code from routines that return
void.

pax/pax.h:
Use the system macros for major(), minor() and makedev().

pax already checks _all_ output conversions for overflow.  This has the
undesirable effect that failure to convert relatively useless fields
such as st_dev for regular files causes files not to be output.  pax
doesn't report exactly which fields couldn't be converted.

tar/create.c:
Don't output a file if the major or minor its rdev would be truncated.
Print a message about the skipped files to stderr and report the error
in the exit status.

tar/tar.c:
For not immediately fatal errors, exit with status 1, not the error count
(mod 256).

All:
Minor numbers are limited to 21 bits in pax's ustar format and to 18
bits in archives created by gnu tar (gnu tar wastes 3 bits for padding).
pax's and cpio's ustar format is incompatible with gnu tar's ustar
format for other reasons (see cpio/README).
1995-06-26 06:24:48 +00:00

1543 lines
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/* Tar -- a tape archiver.
Copyright (C) 1988, 1992, 1993 Free Software Foundation
This file is part of GNU Tar.
GNU Tar 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.
GNU Tar 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 GNU Tar; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/*
* A tar (tape archiver) program.
*
* Written by John Gilmore, ihnp4!hoptoad!gnu, starting 25 Aug 85.
*/
#include <stdio.h>
#include <sys/types.h> /* Needed for typedefs in tar.h */
#include "getopt.h"
/*
* The following causes "tar.h" to produce definitions of all the
* global variables, rather than just "extern" declarations of them.
*/
#define TAR_EXTERN /**/
#include "tar.h"
#include "port.h"
#include "gnuregex.h"
#include "fnmatch.h"
/*
* We should use a conversion routine that does reasonable error
* checking -- atoi doesn't. For now, punt. FIXME.
*/
#define intconv atoi
PTR ck_malloc ();
PTR ck_realloc ();
extern int getoldopt ();
extern void read_and ();
extern void list_archive ();
extern void extract_archive ();
extern void diff_archive ();
extern void create_archive ();
extern void update_archive ();
extern void junk_archive ();
extern void init_volume_number ();
extern void closeout_volume_number ();
/* JF */
extern time_t get_date ();
time_t new_time;
static FILE *namef; /* File to read names from */
static char **n_argv; /* Argv used by name routines */
static int n_argc; /* Argc used by name routines */
static char **n_ind; /* Store an array of names */
static int n_indalloc; /* How big is the array? */
static int n_indused; /* How many entries does it have? */
static int n_indscan; /* How many of the entries have we scanned? */
extern FILE *msg_file;
int check_exclude ();
void add_exclude ();
void add_exclude_file ();
void addname ();
void describe ();
void diff_init ();
void extr_init ();
int is_regex ();
void name_add ();
void name_init ();
void options ();
char *un_quote_string ();
int nlpsfreed = 0;
#ifndef S_ISLNK
#define lstat stat
#endif
#ifndef DEFBLOCKING
#define DEFBLOCKING 20
#endif
#ifndef DEF_AR_FILE
#define DEF_AR_FILE "tar.out"
#endif
/* For long options that unconditionally set a single flag, we have getopt
do it. For the others, we share the code for the equivalent short
named option, the name of which is stored in the otherwise-unused `val'
field of the `struct option'; for long options that have no equivalent
short option, we use nongraphic characters as pseudo short option
characters, starting (for no particular reason) with character 10. */
struct option long_options[] =
{
{"create", 0, 0, 'c'},
{"append", 0, 0, 'r'},
{"extract", 0, 0, 'x'},
{"get", 0, 0, 'x'},
{"list", 0, 0, 't'},
{"update", 0, 0, 'u'},
{"catenate", 0, 0, 'A'},
{"concatenate", 0, 0, 'A'},
{"compare", 0, 0, 'd'},
{"diff", 0, 0, 'd'},
{"delete", 0, 0, 14},
{"help", 0, 0, 12},
{"null", 0, 0, 16},
{"directory", 1, 0, 'C'},
{"record-number", 0, &f_sayblock, 1},
{"files-from", 1, 0, 'T'},
{"label", 1, 0, 'V'},
{"exclude-from", 1, 0, 'X'},
{"exclude", 1, 0, 15},
{"file", 1, 0, 'f'},
{"block-size", 1, 0, 'b'},
{"version", 0, 0, 11},
{"verbose", 0, 0, 'v'},
{"totals", 0, &f_totals, 1},
{"read-full-blocks", 0, &f_reblock, 1},
{"starting-file", 1, 0, 'K'},
{"to-stdout", 0, &f_exstdout, 1},
{"ignore-zeros", 0, &f_ignorez, 1},
{"keep-old-files", 0, 0, 'k'},
{"same-permissions", 0, &f_use_protection, 1},
{"preserve-permissions", 0, &f_use_protection, 1},
{"modification-time", 0, &f_modified, 1},
{"preserve", 0, 0, 10},
{"same-order", 0, &f_sorted_names, 1},
{"same-owner", 0, &f_do_chown, 1},
{"preserve-order", 0, &f_sorted_names, 1},
{"newer", 1, 0, 'N'},
{"after-date", 1, 0, 'N'},
{"newer-mtime", 1, 0, 13},
{"incremental", 0, 0, 'G'},
{"listed-incremental", 1, 0, 'g'},
{"multi-volume", 0, &f_multivol, 1},
{"info-script", 1, 0, 'F'},
{"new-volume-script", 1, 0, 'F'},
{"absolute-paths", 0, &f_absolute_paths, 1},
{"interactive", 0, &f_confirm, 1},
{"confirmation", 0, &f_confirm, 1},
{"verify", 0, &f_verify, 1},
{"dereference", 0, &f_follow_links, 1},
{"one-file-system", 0, &f_local_filesys, 1},
{"old-archive", 0, 0, 'o'},
{"portability", 0, 0, 'o'},
{"compress", 0, 0, 'Z'},
{"uncompress", 0, 0, 'Z'},
{"block-compress", 0, &f_compress_block, 1},
{"gzip", 0, 0, 'z'},
{"ungzip", 0, 0, 'z'},
{"use-compress-program", 1, 0, 18},
{"same-permissions", 0, &f_use_protection, 1},
{"sparse", 0, &f_sparse_files, 1},
{"tape-length", 1, 0, 'L'},
{"remove-files", 0, &f_remove_files, 1},
{"ignore-failed-read", 0, &f_ignore_failed_read, 1},
{"checkpoint", 0, &f_checkpoint, 1},
{"show-omitted-dirs", 0, &f_show_omitted_dirs, 1},
{"volno-file", 1, 0, 17},
{"force-local", 0, &f_force_local, 1},
{"atime-preserve", 0, &f_atime_preserve, 1},
{"unlink", 0, &f_unlink, 1},
{"fast-read", 0, &f_fast_read, 1},
{0, 0, 0, 0}
};
/*
* Main routine for tar.
*/
void
main (argc, argv)
int argc;
char **argv;
{
extern char version_string[];
tar = argv[0]; /* JF: was "tar" Set program name */
filename_terminator = '\n';
errors = 0;
options (argc, argv);
if (!n_argv)
name_init (argc, argv);
if (f_volno_file)
init_volume_number ();
switch (cmd_mode)
{
case CMD_CAT:
case CMD_UPDATE:
case CMD_APPEND:
update_archive ();
break;
case CMD_DELETE:
junk_archive ();
break;
case CMD_CREATE:
create_archive ();
if (f_totals)
fprintf (stderr, "Total bytes written: %d\n", tot_written);
break;
case CMD_EXTRACT:
if (f_volhdr)
{
const char *err;
label_pattern = (struct re_pattern_buffer *)
ck_malloc (sizeof *label_pattern);
err = re_compile_pattern (f_volhdr, strlen (f_volhdr),
label_pattern);
if (err)
{
fprintf (stderr, "Bad regular expression: %s\n",
err);
errors++;
break;
}
}
extr_init ();
read_and (extract_archive);
break;
case CMD_LIST:
if (f_volhdr)
{
const char *err;
label_pattern = (struct re_pattern_buffer *)
ck_malloc (sizeof *label_pattern);
err = re_compile_pattern (f_volhdr, strlen (f_volhdr),
label_pattern);
if (err)
{
fprintf (stderr, "Bad regular expression: %s\n",
err);
errors++;
break;
}
}
read_and (list_archive);
#if 0
if (!errors)
errors = different;
#endif
break;
case CMD_DIFF:
diff_init ();
read_and (diff_archive);
break;
case CMD_VERSION:
fprintf (stderr, "%s\n", version_string);
break;
case CMD_NONE:
msg ("you must specify exactly one of the r, c, t, x, or d options\n");
fprintf (stderr, "For more information, type ``%s --help''.\n", tar);
exit (EX_ARGSBAD);
}
if (f_volno_file)
closeout_volume_number ();
exit (errors ? EX_ARGSBAD : 0); /* FIXME (should be EX_NONDESCRIPT) */
/* NOTREACHED */
}
/*
* Parse the options for tar.
*/
void
options (argc, argv)
int argc;
char **argv;
{
register int c; /* Option letter */
int ind = -1;
/* Set default option values */
blocking = DEFBLOCKING; /* From Makefile */
ar_files = (char **) ck_malloc (sizeof (char *) * 10);
ar_files_len = 10;
n_ar_files = 0;
cur_ar_file = 0;
/* Parse options */
while ((c = getoldopt (argc, argv,
"-01234567Ab:BcC:df:F:g:GhikK:lL:mMN:oOpPrRsStT:uvV:wWxX:zZ",
long_options, &ind)) != EOF)
{
switch (c)
{
case 0: /* long options that set a single flag */
break;
case 1:
/* File name or non-parsed option */
name_add (optarg);
break;
case 'C':
name_add ("-C");
name_add (optarg);
break;
case 10: /* preserve */
f_use_protection = f_sorted_names = 1;
break;
case 11:
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_VERSION;
break;
case 12: /* help */
printf ("This is GNU tar, the tape archiving program.\n");
describe ();
exit (1);
case 13:
f_new_files++;
goto get_newer;
case 14: /* Delete in the archive */
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_DELETE;
break;
case 15:
f_exclude++;
add_exclude (optarg);
break;
case 16: /* -T reads null terminated filenames. */
filename_terminator = '\0';
break;
case 17:
f_volno_file = optarg;
break;
case 18:
if (f_compressprog)
{
msg ("Only one compression option permitted\n");
exit (EX_ARGSBAD);
}
f_compressprog = optarg;
break;
case 'g': /* We are making a GNU dump; save
directories at the beginning of
the archive, and include in each
directory its contents */
if (f_oldarch)
goto badopt;
f_gnudump++;
gnu_dumpfile = optarg;
break;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
{
/* JF this'll have to be modified for other
systems, of course! */
int d, add;
static char buf[50];
d = getoldopt (argc, argv, "lmh");
#ifdef MAYBEDEF
sprintf (buf, "/dev/rmt/%d%c", c, d);
#else
#ifndef LOW_NUM
#define LOW_NUM 0
#define MID_NUM 8
#define HGH_NUM 16
#endif
if (d == 'l')
add = LOW_NUM;
else if (d == 'm')
add = MID_NUM;
else if (d == 'h')
add = HGH_NUM;
else
goto badopt;
sprintf (buf, "/dev/rmt%d", add + c - '0');
#endif
if (n_ar_files == ar_files_len)
ar_files
= (char **)
ck_malloc (sizeof (char *)
* (ar_files_len *= 2));
ar_files[n_ar_files++] = buf;
}
break;
case 'A': /* Arguments are tar files,
just cat them onto the end
of the archive. */
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_CAT;
break;
case 'b': /* Set blocking factor */
blocking = intconv (optarg);
break;
case 'B': /* Try to reblock input */
f_reblock++; /* For reading 4.2BSD pipes */
break;
case 'c': /* Create an archive */
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_CREATE;
break;
#if 0
case 'C':
if (chdir (optarg) < 0)
msg_perror ("Can't change directory to %d", optarg);
break;
#endif
case 'd': /* Find difference tape/disk */
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_DIFF;
break;
case 'f': /* Use ar_file for the archive */
if (n_ar_files == ar_files_len)
ar_files
= (char **) ck_malloc (sizeof (char *)
* (ar_files_len *= 2));
ar_files[n_ar_files++] = optarg;
break;
case 'F':
/* Since -F is only useful with -M , make it implied */
f_run_script_at_end++;/* run this script at the end */
info_script = optarg; /* of each tape */
f_multivol++;
break;
case 'G': /* We are making a GNU dump; save
directories at the beginning of
the archive, and include in each
directory its contents */
if (f_oldarch)
goto badopt;
f_gnudump++;
gnu_dumpfile = 0;
break;
case 'h':
f_follow_links++; /* follow symbolic links */
break;
case 'i':
f_ignorez++; /* Ignore zero records (eofs) */
/*
* This can't be the default, because Unix tar
* writes two records of zeros, then pads out the
* block with garbage.
*/
break;
case 'k': /* Don't overwrite files */
#ifdef NO_OPEN3
msg ("can't keep old files on this system");
exit (EX_ARGSBAD);
#else
f_keep++;
#endif
break;
case 'K':
f_startfile++;
addname (optarg);
break;
case 'l': /* When dumping directories, don't
dump files/subdirectories that are
on other filesystems. */
f_local_filesys++;
break;
case 'L':
tape_length = intconv (optarg);
f_multivol++;
break;
case 'm':
f_modified++;
break;
case 'M': /* Make Multivolume archive:
When we can't write any more
into the archive, re-open it,
and continue writing */
f_multivol++;
break;
case 'N': /* Only write files newer than X */
get_newer:
f_new_files++;
new_time = get_date (optarg, (PTR) 0);
if (new_time == (time_t) - 1)
{
msg ("invalid date format `%s'", optarg);
exit (EX_ARGSBAD);
}
break;
case 'o': /* Generate old archive */
if (f_gnudump /* || f_dironly */ )
goto badopt;
f_oldarch++;
break;
case 'O':
f_exstdout++;
break;
case 'p':
f_use_protection++;
break;
case 'P':
f_absolute_paths++;
break;
case 'r': /* Append files to the archive */
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_APPEND;
break;
case 'R':
f_sayblock++; /* Print block #s for debug */
break; /* of bad tar archives */
case 's':
f_sorted_names++; /* Names to extr are sorted */
break;
case 'S': /* deal with sparse files */
f_sparse_files++;
break;
case 't':
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_LIST;
f_verbose++; /* "t" output == "cv" or "xv" */
break;
case 'T':
name_file = optarg;
f_namefile++;
break;
case 'u': /* Append files to the archive that
aren't there, or are newer than the
copy in the archive */
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_UPDATE;
break;
case 'v':
f_verbose++;
break;
case 'V':
f_volhdr = optarg;
break;
case 'w':
f_confirm++;
break;
case 'W':
f_verify++;
break;
case 'x': /* Extract files from the archive */
if (cmd_mode != CMD_NONE)
goto badopt;
cmd_mode = CMD_EXTRACT;
break;
case 'X':
f_exclude++;
add_exclude_file (optarg);
break;
case 'z':
if (f_compressprog)
{
msg ("Only one compression option permitted\n");
exit (EX_ARGSBAD);
}
f_compressprog = "gzip";
break;
case 'Z':
if (f_compressprog)
{
msg ("Only one compression option permitted\n");
exit (EX_ARGSBAD);
}
f_compressprog = "compress";
break;
case '?':
badopt:
msg ("Unknown option. Use '%s --help' for a complete list of options.", tar);
exit (EX_ARGSBAD);
}
}
blocksize = blocking * RECORDSIZE;
if (n_ar_files == 0)
{
n_ar_files = 1;
ar_files[0] = getenv ("TAPE"); /* From environment, or */
if (ar_files[0] == 0)
ar_files[0] = DEF_AR_FILE; /* From Makefile */
}
if (n_ar_files > 1 && !f_multivol)
{
msg ("Multiple archive files requires --multi-volume\n");
exit (EX_ARGSBAD);
}
if (f_compress_block && !f_compressprog)
{
msg ("You must use a compression option (--gzip, --compress\n\
or --use-compress-program) with --block-compress.\n");
exit (EX_ARGSBAD);
}
}
/*
* Print as much help as the user's gonna get.
*
* We have to sprinkle in the KLUDGE lines because too many compilers
* cannot handle character strings longer than about 512 bytes. Yuk!
* In particular, MS-DOS and Xenix MSC and PDP-11 V7 Unix have this
* problem.
*/
void
describe ()
{
puts ("choose one of the following:");
fputs ("\
-A, --catenate,\n\
--concatenate append tar files to an archive\n\
-c, --create create a new archive\n\
-d, --diff,\n\
--compare find differences between archive and file system\n\
--delete delete from the archive (not for use on mag tapes!)\n\
-r, --append append files to the end of an archive\n\
-t, --list list the contents of an archive\n\
-u, --update only append files that are newer than copy in archive\n\
-x, --extract,\n\
--get extract files from an archive\n", stdout);
fprintf (stdout, "\
Other options:\n\
--atime-preserve don't change access times on dumped files\n\
-b, --block-size N block size of Nx512 bytes (default N=%d)\n", DEFBLOCKING);
fputs ("\
-B, --read-full-blocks reblock as we read (for reading 4.2BSD pipes)\n\
-C, --directory DIR change to directory DIR\n\
--checkpoint print directory names while reading the archive\n\
", stdout); /* KLUDGE */
fprintf (stdout, "\
-f, --file [HOSTNAME:]F use archive file or device F (default %s)\n",
DEF_AR_FILE);
fputs ("\
--force-local archive file is local even if has a colon\n\
-F, --info-script F\n\
--new-volume-script F run script at end of each tape (implies -M)\n\
-G, --incremental create/list/extract old GNU-format incremental backup\n\
-g, --listed-incremental F create/list/extract new GNU-format incremental backup\n\
-h, --dereference don't dump symlinks; dump the files they point to\n\
-i, --ignore-zeros ignore blocks of zeros in archive (normally mean EOF)\n\
--ignore-failed-read don't exit with non-zero status on unreadable files\n\
-k, --keep-old-files keep existing files; don't overwrite them from archive\n\
-K, --starting-file F begin at file F in the archive\n\
-l, --one-file-system stay in local file system when creating an archive\n\
-L, --tape-length N change tapes after writing N*1024 bytes\n\
", stdout); /* KLUDGE */
fputs ("\
-m, --modification-time don't extract file modified time\n\
-M, --multi-volume create/list/extract multi-volume archive\n\
-N, --after-date DATE,\n\
--newer DATE only store files newer than DATE\n\
-o, --old-archive,\n\
--portability write a V7 format archive, rather than ANSI format\n\
-O, --to-stdout extract files to standard output\n\
-p, --same-permissions,\n\
--preserve-permissions extract all protection information\n\
-P, --absolute-paths don't strip leading `/'s from file names\n\
--preserve like -p -s\n\
", stdout); /* KLUDGE */
fputs ("\
-R, --record-number show record number within archive with each message\n\
--remove-files remove files after adding them to the archive\n\
-s, --same-order,\n\
--preserve-order list of names to extract is sorted to match archive\n\
--same-owner create extracted files with the same ownership \n\
-S, --sparse handle sparse files efficiently\n\
-T, --files-from F get names to extract or create from file F\n\
--null -T reads null-terminated names, disable -C\n\
--totals print total bytes written with --create\n\
-v, --verbose verbosely list files processed\n\
-V, --label NAME create archive with volume name NAME\n\
--version print tar program version number\n\
-w, --interactive,\n\
--confirmation ask for confirmation for every action\n\
", stdout); /* KLUDGE */
fputs ("\
-W, --verify attempt to verify the archive after writing it\n\
--exclude FILE exclude file FILE\n\
-X, --exclude-from FILE exclude files listed in FILE\n\
-Z, --compress,\n\
--uncompress filter the archive through compress\n\
-z, --gzip,\n\
--ungzip filter the archive through gzip\n\
--use-compress-program PROG\n\
filter the archive through PROG (which must accept -d)\n\
--block-compress block the output of compression program for tapes\n\
-[0-7][lmh] specify drive and density\n\
--unlink unlink files before creating them\n\
--fast-read stop after desired names in archive have been found\n\
", stdout);
}
void
name_add (name)
char *name;
{
if (n_indalloc == n_indused)
{
n_indalloc += 10;
n_ind = (char **) (n_indused ? ck_realloc (n_ind, n_indalloc * sizeof (char *)): ck_malloc (n_indalloc * sizeof (char *)));
}
n_ind[n_indused++] = name;
}
/*
* Set up to gather file names for tar.
*
* They can either come from stdin or from argv.
*/
void
name_init (argc, argv)
int argc;
char **argv;
{
if (f_namefile)
{
if (optind < argc)
{
msg ("too many args with -T option");
exit (EX_ARGSBAD);
}
if (!strcmp (name_file, "-"))
{
namef = stdin;
}
else
{
namef = fopen (name_file, "r");
if (namef == NULL)
{
msg_perror ("can't open file %s", name_file);
exit (EX_BADFILE);
}
}
}
else
{
/* Get file names from argv, after options. */
n_argc = argc;
n_argv = argv;
}
}
/* Read the next filename read from STREAM and null-terminate it.
Put it into BUFFER, reallocating and adjusting *PBUFFER_SIZE if necessary.
Return the new value for BUFFER, or NULL at end of file. */
char *
read_name_from_file (buffer, pbuffer_size, stream)
char *buffer;
size_t *pbuffer_size;
FILE *stream;
{
register int c;
register int indx = 0;
register size_t buffer_size = *pbuffer_size;
while ((c = getc (stream)) != EOF && c != filename_terminator)
{
if (indx == buffer_size)
{
buffer_size += NAMSIZ;
buffer = ck_realloc (buffer, buffer_size + 2);
}
buffer[indx++] = c;
}
if (indx == 0 && c == EOF)
return NULL;
if (indx == buffer_size)
{
buffer_size += NAMSIZ;
buffer = ck_realloc (buffer, buffer_size + 2);
}
buffer[indx] = '\0';
*pbuffer_size = buffer_size;
return buffer;
}
/*
* Get the next name from argv or the name file.
*
* Result is in static storage and can't be relied upon across two calls.
*
* If CHANGE_DIRS is non-zero, treat a filename of the form "-C" as
* meaning that the next filename is the name of a directory to change to.
* If `filename_terminator' is '\0', CHANGE_DIRS is effectively always 0.
*/
char *
name_next (change_dirs)
int change_dirs;
{
static char *buffer; /* Holding pattern */
static int buffer_siz;
register char *p;
register char *q = 0;
register int next_name_is_dir = 0;
extern char *un_quote_string ();
if (buffer_siz == 0)
{
buffer = ck_malloc (NAMSIZ + 2);
buffer_siz = NAMSIZ;
}
if (filename_terminator == '\0')
change_dirs = 0;
tryagain:
if (namef == NULL)
{
if (n_indscan < n_indused)
p = n_ind[n_indscan++];
else if (optind < n_argc)
/* Names come from argv, after options */
p = n_argv[optind++];
else
{
if (q)
msg ("Missing filename after -C");
return NULL;
}
/* JF trivial support for -C option. I don't know if
chdir'ing at this point is dangerous or not.
It seems to work, which is all I ask. */
if (change_dirs && !q && p[0] == '-' && p[1] == 'C' && p[2] == '\0')
{
q = p;
goto tryagain;
}
if (q)
{
if (chdir (p) < 0)
msg_perror ("Can't chdir to %s", p);
q = 0;
goto tryagain;
}
/* End of JF quick -C hack */
#if 0
if (f_exclude && check_exclude (p))
goto tryagain;
#endif
return un_quote_string (p);
}
while (p = read_name_from_file (buffer, &buffer_siz, namef))
{
buffer = p;
if (*p == '\0')
continue; /* Ignore empty lines. */
q = p + strlen (p) - 1;
while (q > p && *q == '/')/* Zap trailing "/"s. */
*q-- = '\0';
if (change_dirs && next_name_is_dir == 0
&& p[0] == '-' && p[1] == 'C' && p[2] == '\0')
{
next_name_is_dir = 1;
goto tryagain;
}
if (next_name_is_dir)
{
if (chdir (p) < 0)
msg_perror ("Can't change to directory %s", p);
next_name_is_dir = 0;
goto tryagain;
}
#if 0
if (f_exclude && check_exclude (p))
goto tryagain;
#endif
return un_quote_string (p);
}
return NULL;
}
/*
* Close the name file, if any.
*/
void
name_close ()
{
if (namef != NULL && namef != stdin)
fclose (namef);
}
/*
* Gather names in a list for scanning.
* Could hash them later if we really care.
*
* If the names are already sorted to match the archive, we just
* read them one by one. name_gather reads the first one, and it
* is called by name_match as appropriate to read the next ones.
* At EOF, the last name read is just left in the buffer.
* This option lets users of small machines extract an arbitrary
* number of files by doing "tar t" and editing down the list of files.
*/
void
name_gather ()
{
register char *p;
static struct name *namebuf; /* One-name buffer */
static namelen;
static char *chdir_name;
if (f_sorted_names)
{
if (!namelen)
{
namelen = NAMSIZ;
namebuf = (struct name *) ck_malloc (sizeof (struct name) + NAMSIZ);
}
p = name_next (0);
if (p)
{
if (*p == '-' && p[1] == 'C' && p[2] == '\0')
{
p = name_next (0);
chdir_name = p ? strdup(p) : p;
p = name_next (0);
if (!chdir_name)
{
msg ("Missing file name after -C");
exit (EX_ARGSBAD);
}
namebuf->change_dir = chdir_name;
}
namebuf->length = strlen (p);
if (namebuf->length >= namelen)
{
namebuf = (struct name *) ck_realloc (namebuf, sizeof (struct name) + namebuf->length);
namelen = namebuf->length;
}
strncpy (namebuf->name, p, namebuf->length);
namebuf->name[namebuf->length] = 0;
namebuf->next = (struct name *) NULL;
namebuf->found = 0;
namelist = namebuf;
namelast = namelist;
}
return;
}
/* Non sorted names -- read them all in */
while (p = name_next (0))
addname (p);
}
/*
* Add a name to the namelist.
*/
void
addname (name)
char *name; /* pointer to name */
{
register int i; /* Length of string */
register struct name *p; /* Current struct pointer */
static char *chdir_name;
char *new_name ();
if (name[0] == '-' && name[1] == 'C' && name[2] == '\0')
{
name = name_next (0);
chdir_name = name ? strdup(name) : name;
name = name_next (0);
if (!chdir_name)
{
msg ("Missing file name after -C");
exit (EX_ARGSBAD);
}
if (chdir_name[0] != '/')
{
char *path = ck_malloc (PATH_MAX);
#if defined(__MSDOS__) || defined(HAVE_GETCWD) || defined(_POSIX_VERSION)
if (!getcwd (path, PATH_MAX))
{
msg ("Couldn't get current directory.");
exit (EX_SYSTEM);
}
#else
char *getwd ();
if (!getwd (path))
{
msg ("Couldn't get current directory: %s", path);
exit (EX_SYSTEM);
}
#endif
chdir_name = new_name (path, chdir_name);
free (path);
}
}
if (name)
{
i = strlen (name);
/*NOSTRICT*/
p = (struct name *) malloc ((unsigned) (sizeof (struct name) + i));
}
else
p = (struct name *) malloc ((unsigned) (sizeof (struct name)));
if (!p)
{
if (name)
msg ("cannot allocate mem for name '%s'.", name);
else
msg ("cannot allocate mem for chdir record.");
exit (EX_SYSTEM);
}
p->next = (struct name *) NULL;
if (name)
{
p->fake = 0;
p->length = i;
strncpy (p->name, name, i);
p->name[i] = '\0'; /* Null term */
}
else
p->fake = 1;
p->found = 0;
p->regexp = 0; /* Assume not a regular expression */
p->firstch = 1; /* Assume first char is literal */
p->change_dir = chdir_name;
p->dir_contents = 0; /* JF */
if (name)
{
if (index (name, '*') || index (name, '[') || index (name, '?'))
{
p->regexp = 1; /* No, it's a regexp */
if (name[0] == '*' || name[0] == '[' || name[0] == '?')
p->firstch = 0; /* Not even 1st char literal */
}
}
if (namelast)
namelast->next = p;
namelast = p;
if (!namelist)
namelist = p;
}
/*
* Return nonzero if name P (from an archive) matches any name from
* the namelist, zero if not.
*/
int
name_match (p)
register char *p;
{
register struct name *nlp;
struct name *tmpnlp;
register int len;
again:
if (0 == (nlp = namelist)) /* Empty namelist is easy */
return 1;
if (nlp->fake)
{
if (nlp->change_dir && chdir (nlp->change_dir))
msg_perror ("Can't change to directory %d", nlp->change_dir);
namelist = 0;
return 1;
}
len = strlen (p);
for (; nlp != 0; nlp = nlp->next)
{
/* If first chars don't match, quick skip */
if (nlp->firstch && nlp->name[0] != p[0])
continue;
/* Regular expressions (shell globbing, actually). */
if (nlp->regexp)
{
if (fnmatch (nlp->name, p, FNM_LEADING_DIR) == 0)
{
nlp->found = 1; /* Remember it matched */
if (f_startfile)
{
free ((void *) namelist);
namelist = 0;
}
if (nlp->change_dir && chdir (nlp->change_dir))
msg_perror ("Can't change to directory %s", nlp->change_dir);
return 1; /* We got a match */
}
continue;
}
/* Plain Old Strings */
if (nlp->length <= len /* Archive len >= specified */
&& (p[nlp->length] == '\0' || p[nlp->length] == '/')
/* Full match on file/dirname */
&& strncmp (p, nlp->name, nlp->length) == 0) /* Name compare */
{
nlp->found = 1; /* Remember it matched */
if (f_startfile)
{
free ((void *) namelist);
namelist = 0;
}
if (nlp->change_dir && chdir (nlp->change_dir))
msg_perror ("Can't change to directory %s", nlp->change_dir);
if (f_fast_read) {
if (strcmp(p, nlp->name) == 0) {
/* remove the current entry, since we found a match */
/* use brute force, this code is a mess anyway */
if (namelist->next == NULL) {
/* the list contains one element */
free(namelist);
namelist = NULL;
} else {
if (nlp == namelist) {
/* the first element is the one */
tmpnlp = namelist->next;
free(namelist);
namelist = tmpnlp;
} else {
tmpnlp = namelist;
while (tmpnlp->next != nlp) {
tmpnlp = tmpnlp->next;
}
tmpnlp->next = nlp->next;
free(nlp);
}
}
/* set a boolean to decide wether we started with a */
/* non-empty namelist, that was emptied */
nlpsfreed = 1;
}
}
return 1; /* We got a match */
}
}
/*
* Filename from archive not found in namelist.
* If we have the whole namelist here, just return 0.
* Otherwise, read the next name in and compare it.
* If this was the last name, namelist->found will remain on.
* If not, we loop to compare the newly read name.
*/
if (f_sorted_names && namelist->found)
{
name_gather (); /* Read one more */
if (!namelist->found)
goto again;
}
return 0;
}
/*
* Print the names of things in the namelist that were not matched.
*/
void
names_notfound ()
{
register struct name *nlp, *next;
register char *p;
for (nlp = namelist; nlp != 0; nlp = next)
{
next = nlp->next;
if (!nlp->found)
msg ("%s not found in archive", nlp->name);
/*
* We could free() the list, but the process is about
* to die anyway, so save some CPU time. Amigas and
* other similarly broken software will need to waste
* the time, though.
*/
#ifdef amiga
if (!f_sorted_names)
free (nlp);
#endif
}
namelist = (struct name *) NULL;
namelast = (struct name *) NULL;
if (f_sorted_names)
{
while (0 != (p = name_next (1)))
msg ("%s not found in archive", p);
}
}
/* These next routines were created by JF */
void
name_expand ()
{
;
}
/* This is like name_match(), except that it returns a pointer to the name
it matched, and doesn't set ->found The caller will have to do that
if it wants to. Oh, and if the namelist is empty, it returns 0, unlike
name_match(), which returns TRUE */
struct name *
name_scan (p)
register char *p;
{
register struct name *nlp;
register int len;
again:
if (0 == (nlp = namelist)) /* Empty namelist is easy */
return 0;
len = strlen (p);
for (; nlp != 0; nlp = nlp->next)
{
/* If first chars don't match, quick skip */
if (nlp->firstch && nlp->name[0] != p[0])
continue;
/* Regular expressions */
if (nlp->regexp)
{
if (fnmatch (nlp->name, p, FNM_LEADING_DIR) == 0)
return nlp; /* We got a match */
continue;
}
/* Plain Old Strings */
if (nlp->length <= len /* Archive len >= specified */
&& (p[nlp->length] == '\0' || p[nlp->length] == '/')
/* Full match on file/dirname */
&& strncmp (p, nlp->name, nlp->length) == 0) /* Name compare */
return nlp; /* We got a match */
}
/*
* Filename from archive not found in namelist.
* If we have the whole namelist here, just return 0.
* Otherwise, read the next name in and compare it.
* If this was the last name, namelist->found will remain on.
* If not, we loop to compare the newly read name.
*/
if (f_sorted_names && namelist->found)
{
name_gather (); /* Read one more */
if (!namelist->found)
goto again;
}
return (struct name *) 0;
}
/* This returns a name from the namelist which doesn't have ->found set.
It sets ->found before returning, so successive calls will find and return
all the non-found names in the namelist */
struct name *gnu_list_name;
char *
name_from_list ()
{
if (!gnu_list_name)
gnu_list_name = namelist;
while (gnu_list_name && gnu_list_name->found)
gnu_list_name = gnu_list_name->next;
if (gnu_list_name)
{
gnu_list_name->found++;
if (gnu_list_name->change_dir)
if (chdir (gnu_list_name->change_dir) < 0)
msg_perror ("can't chdir to %s", gnu_list_name->change_dir);
return gnu_list_name->name;
}
return (char *) 0;
}
void
blank_name_list ()
{
struct name *n;
gnu_list_name = 0;
for (n = namelist; n; n = n->next)
n->found = 0;
}
char *
new_name (path, name)
char *path, *name;
{
char *path_buf;
path_buf = (char *) malloc (strlen (path) + strlen (name) + 2);
if (path_buf == 0)
{
msg ("Can't allocate memory for name '%s/%s", path, name);
exit (EX_SYSTEM);
}
(void) sprintf (path_buf, "%s/%s", path, name);
return path_buf;
}
/* returns non-zero if the luser typed 'y' or 'Y', zero otherwise. */
int
confirm (action, file)
char *action, *file;
{
int c, nl;
static FILE *confirm_file = 0;
extern FILE *msg_file;
extern char TTY_NAME[];
fprintf (msg_file, "%s %s?", action, file);
fflush (msg_file);
if (!confirm_file)
{
confirm_file = (archive == 0) ? fopen (TTY_NAME, "r") : stdin;
if (!confirm_file)
{
msg ("Can't read confirmation from user");
exit (EX_SYSTEM);
}
}
c = getc (confirm_file);
for (nl = c; nl != '\n' && nl != EOF; nl = getc (confirm_file))
;
return (c == 'y' || c == 'Y');
}
char *x_buffer = 0;
int size_x_buffer;
int free_x_buffer;
char **exclude = 0;
int size_exclude = 0;
int free_exclude = 0;
char **re_exclude = 0;
int size_re_exclude = 0;
int free_re_exclude = 0;
void
add_exclude (name)
char *name;
{
/* char *rname;*/
/* char **tmp_ptr;*/
int size_buf;
un_quote_string (name);
size_buf = strlen (name);
if (x_buffer == 0)
{
x_buffer = (char *) ck_malloc (size_buf + 1024);
free_x_buffer = 1024;
}
else if (free_x_buffer <= size_buf)
{
char *old_x_buffer;
char **tmp_ptr;
old_x_buffer = x_buffer;
x_buffer = (char *) ck_realloc (x_buffer, size_x_buffer + 1024);
free_x_buffer = 1024;
for (tmp_ptr = exclude; tmp_ptr < exclude + size_exclude; tmp_ptr++)
*tmp_ptr = x_buffer + ((*tmp_ptr) - old_x_buffer);
for (tmp_ptr = re_exclude; tmp_ptr < re_exclude + size_re_exclude; tmp_ptr++)
*tmp_ptr = x_buffer + ((*tmp_ptr) - old_x_buffer);
}
if (is_regex (name))
{
if (free_re_exclude == 0)
{
re_exclude = (char **) (re_exclude ? ck_realloc (re_exclude, (size_re_exclude + 32) * sizeof (char *)): ck_malloc (sizeof (char *) * 32));
free_re_exclude += 32;
}
re_exclude[size_re_exclude] = x_buffer + size_x_buffer;
size_re_exclude++;
free_re_exclude--;
}
else
{
if (free_exclude == 0)
{
exclude = (char **) (exclude ? ck_realloc (exclude, (size_exclude + 32) * sizeof (char *)): ck_malloc (sizeof (char *) * 32));
free_exclude += 32;
}
exclude[size_exclude] = x_buffer + size_x_buffer;
size_exclude++;
free_exclude--;
}
strcpy (x_buffer + size_x_buffer, name);
size_x_buffer += size_buf + 1;
free_x_buffer -= size_buf + 1;
}
void
add_exclude_file (file)
char *file;
{
FILE *fp;
char buf[1024];
if (strcmp (file, "-"))
fp = fopen (file, "r");
else
/* Let's hope the person knows what they're doing. */
/* Using -X - -T - -f - will get you *REALLY* strange
results. . . */
fp = stdin;
if (!fp)
{
msg_perror ("can't open %s", file);
exit (2);
}
while (fgets (buf, 1024, fp))
{
/* int size_buf;*/
char *end_str;
end_str = rindex (buf, '\n');
if (end_str)
*end_str = '\0';
add_exclude (buf);
}
fclose (fp);
}
int
is_regex (str)
char *str;
{
return index (str, '*') || index (str, '[') || index (str, '?');
}
/* Returns non-zero if the file 'name' should not be added/extracted */
int
check_exclude (name)
char *name;
{
int n;
char *str;
extern char *strstr ();
for (n = 0; n < size_re_exclude; n++)
{
if (fnmatch (re_exclude[n], name, FNM_LEADING_DIR) == 0)
return 1;
}
for (n = 0; n < size_exclude; n++)
{
/* Accept the output from strstr only if it is the last
part of the string. There is certainly a faster way to
do this. . . */
if ((str = strstr (name, exclude[n]))
&& (str == name || str[-1] == '/')
&& str[strlen (exclude[n])] == '\0')
return 1;
}
return 0;
}
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