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- /* main.c - main program and argument processing for cpio.
- Copyright (C) 1990, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* Written by Phil Nelson <phil@cs.wwu.edu>,
- David MacKenzie <djm@gnu.ai.mit.edu>,
- and John Oleynick <juo@klinzhai.rutgers.edu>. */
-
- #include <stdio.h>
- #include <getopt.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include "filetypes.h"
- #include "system.h"
- #include "cpiohdr.h"
- #include "dstring.h"
- #include "extern.h"
- #include "rmt.h"
-
- struct option long_opts[] =
- {
- {"null", 0, 0, '0'},
- {"append", 0, 0, 'A'},
- {"block-size", 1, 0, 130},
- {"create", 0, 0, 'o'},
- {"dereference", 0, 0, 'L'},
- {"dot", 0, 0, 'V'},
- {"extract", 0, 0, 'i'},
- {"file", 1, 0, 'F'},
- {"force-local", 0, &f_force_local, 1},
- {"format", 1, 0, 'H'},
- {"help", 0, 0, 132},
- {"io-size", 1, 0, 'C'},
- {"link", 0, &link_flag, TRUE},
- {"list", 0, &table_flag, TRUE},
- {"make-directories", 0, &create_dir_flag, TRUE},
- {"message", 1, 0, 'M'},
- {"no-preserve-owner", 0, 0, 134},
- {"nonmatching", 0, ©_matching_files, FALSE},
- {"numeric-uid-gid", 0, &numeric_uid, TRUE},
- {"owner", 1, 0, 'R'},
- {"pass-through", 0, 0, 'p'},
- {"pattern-file", 1, 0, 'E'},
- {"preserve-modification-time", 0, &retain_time_flag, TRUE},
- {"rename", 0, &rename_flag, TRUE},
- {"swap", 0, 0, 'b'},
- {"swap-bytes", 0, 0, 's'},
- {"swap-halfwords", 0, 0, 'S'},
- {"reset-access-time", 0, &reset_time_flag, TRUE},
- {"unconditional", 0, &unconditional_flag, TRUE},
- {"verbose", 0, &verbose_flag, TRUE},
- {"version", 0, 0, 131},
- #ifdef DEBUG_CPIO
- {"debug", 0, &debug_flag, TRUE},
- #endif
- {0, 0, 0, 0}
- };
-
- /* Print usage message and exit with error. */
-
- void
- usage (fp, status)
- FILE *fp;
- int status;
- {
- fprintf (fp, "\
- Usage: %s {-o|--create} [-0acvABLV] [-C bytes] [-H format] [-M message]\n\
- [-O [[user@]host:]archive] [-F [[user@]host:]archive]\n\
- [--file=[[user@]host:]archive] [--format=format] [--message=message]\n\
- [--null] [--reset-access-time] [--verbose] [--dot] [--append]\n\
- [--block-size=blocks] [--dereference] [--io-size=bytes]\n\
- [--force-local] [--help] [--version] < name-list [> archive]\n", program_name);
- fprintf (fp, "\
- %s {-i|--extract} [-bcdfmnrtsuvBSV] [-C bytes] [-E file] [-H format]\n\
- [-M message] [-R [user][:.][group]] [-I [[user@]host:]archive]\n\
- [-F [[user@]host:]archive] [--file=[[user@]host:]archive]\n\
- [--make-directories] [--nonmatching] [--preserve-modification-time]\n\
- [--numeric-uid-gid] [--rename] [--list] [--swap-bytes] [--swap] [--dot]\n\
- [--unconditional] [--verbose] [--block-size=blocks] [--swap-halfwords]\n\
- [--io-size=bytes] [--pattern-file=file] [--format=format]\n\
- [--owner=[user][:.][group]] [--no-preserve-owner] [--message=message]\n\
- [--force-local] [--help] [--version] [pattern...] [< archive]\n",
- program_name);
- fprintf (fp, "\
- %s {-p|--pass-through} [-0adlmuvLV] [-R [user][:.][group]]\n\
- [--null] [--reset-access-time] [--make-directories] [--link]\n\
- [--preserve-modification-time] [--unconditional] [--verbose] [--dot]\n\
- [--dereference] [--owner=[user][:.][group]] [--no-preserve-owner]\n\
- [--help] [--version] destination-directory < name-list\n", program_name);
- exit (status);
- }
-
- /* Process the arguments. Set all options and set up the copy pass
- directory or the copy in patterns. */
-
- void
- process_args (argc, argv)
- int argc;
- char *argv[];
- {
- extern char *version_string;
- void (*copy_in) (); /* Work around for pcc bug. */
- void (*copy_out) ();
- int c;
- char *input_archive_name = 0;
- char *output_archive_name = 0;
-
- if (argc < 2)
- usage (stderr, 2);
-
- xstat = lstat;
-
- while ((c = getopt_long (argc, argv,
- "0aAbBcC:dfE:F:H:iI:lLmM:noO:prR:sStuvVz",
- long_opts, (int *) 0)) != -1)
- {
- switch (c)
- {
- case 0: /* A long option that just sets a flag. */
- break;
-
- case '0': /* Read null-terminated filenames. */
- name_end = '\0';
- break;
-
- case 'a': /* Reset access times. */
- reset_time_flag = TRUE;
- break;
-
- case 'A': /* Append to the archive. */
- append_flag = TRUE;
- break;
-
- case 'b': /* Swap bytes and halfwords. */
- swap_bytes_flag = TRUE;
- swap_halfwords_flag = TRUE;
- break;
-
- case 'B': /* Set block size to 5120. */
- io_block_size = 5120;
- break;
-
- case 130: /* --block-size */
- io_block_size = atoi (optarg);
- if (io_block_size < 1)
- error (2, 0, "invalid block size");
- io_block_size *= 512;
- break;
-
- case 'c': /* Use the old portable ASCII format. */
- if (archive_format != arf_unknown)
- usage (stderr, 2);
- #ifdef SVR4_COMPAT
- archive_format = arf_newascii; /* -H newc. */
- #else
- archive_format = arf_oldascii; /* -H odc. */
- #endif
- break;
-
- case 'C': /* Block size. */
- io_block_size = atoi (optarg);
- if (io_block_size < 1)
- error (2, 0, "invalid block size");
- break;
-
- case 'd': /* Create directories where needed. */
- create_dir_flag = TRUE;
- break;
-
- case 'f': /* Only copy files not matching patterns. */
- copy_matching_files = FALSE;
- break;
-
- case 'E': /* Pattern file name. */
- pattern_file_name = optarg;
- break;
-
- case 'F': /* Archive file name. */
- archive_name = optarg;
- break;
-
- case 'H': /* Header format name. */
- if (archive_format != arf_unknown)
- usage (stderr, 2);
- if (!strcmp (optarg, "crc") || !strcmp (optarg, "CRC"))
- archive_format = arf_crcascii;
- else if (!strcmp (optarg, "newc") || !strcmp (optarg, "NEWC"))
- archive_format = arf_newascii;
- else if (!strcmp (optarg, "odc") || !strcmp (optarg, "ODC"))
- archive_format = arf_oldascii;
- else if (!strcmp (optarg, "bin") || !strcmp (optarg, "BIN"))
- archive_format = arf_binary;
- else if (!strcmp (optarg, "ustar") || !strcmp (optarg, "USTAR"))
- archive_format = arf_ustar;
- else if (!strcmp (optarg, "tar") || !strcmp (optarg, "TAR"))
- archive_format = arf_tar;
- else if (!strcmp (optarg, "hpodc") || !strcmp (optarg, "HPODC"))
- archive_format = arf_hpoldascii;
- else if (!strcmp (optarg, "hpbin") || !strcmp (optarg, "HPBIN"))
- archive_format = arf_hpbinary;
- else
- error (2, 0, "\
- invalid archive format `%s'; valid formats are:\n\
- crc newc odc bin ustar tar (all-caps also recognized)", optarg);
- break;
-
- case 'i': /* Copy-in mode. */
- if (copy_function != 0)
- usage (stderr, 2);
- copy_function = process_copy_in;
- break;
-
- case 'I': /* Input archive file name. */
- input_archive_name = optarg;
- break;
-
- case 'k': /* Handle corrupted archives. We always handle
- corrupted archives, but recognize this
- option for compatability. */
- break;
-
- case 'l': /* Link files when possible. */
- link_flag = TRUE;
- break;
-
- case 'L': /* Dereference symbolic links. */
- xstat = stat;
- break;
-
- case 'm': /* Retain previous file modify times. */
- retain_time_flag = TRUE;
- break;
-
- case 'M': /* New media message. */
- set_new_media_message (optarg);
- break;
-
- case 'n': /* Long list owner and group as numbers. */
- numeric_uid = TRUE;
- break;
-
- case 134: /* --no-preserve-owner */
- if (set_owner_flag || set_group_flag)
- usage (stderr, 2);
- no_chown_flag = TRUE;
- break;
-
- case 'o': /* Copy-out mode. */
- if (copy_function != 0)
- usage (stderr, 2);
- copy_function = process_copy_out;
- break;
-
- case 'O': /* Output archive file name. */
- output_archive_name = optarg;
- break;
-
- case 'p': /* Copy-pass mode. */
- if (copy_function != 0)
- usage (stderr, 2);
- copy_function = process_copy_pass;
- break;
-
- case 'r': /* Interactively rename. */
- rename_flag = TRUE;
- break;
-
- case 'R': /* Set the owner. */
- if (no_chown_flag)
- usage (stderr, 2);
- #ifndef __MSDOS__
- {
- char *e, *u, *g;
-
- e = parse_user_spec (optarg, &set_owner, &set_group, &u, &g);
- if (e)
- error (2, 0, "%s: %s", optarg, e);
- if (u)
- {
- free (u);
- set_owner_flag = TRUE;
- }
- if (g)
- {
- free (g);
- set_group_flag = TRUE;
- }
- }
- #endif
- break;
-
- case 's': /* Swap bytes. */
- swap_bytes_flag = TRUE;
- break;
-
- case 'S': /* Swap halfwords. */
- swap_halfwords_flag = TRUE;
- break;
-
- case 't': /* Only print a list. */
- table_flag = TRUE;
- break;
-
- case 'u': /* Replace all! Unconditionally! */
- unconditional_flag = TRUE;
- break;
-
- case 'v': /* Verbose! */
- verbose_flag = TRUE;
- break;
-
- case 'V': /* Print `.' for each file. */
- dot_flag = TRUE;
- break;
-
- case 131:
- printf ("GNU cpio %s", version_string);
- exit (0);
- break;
-
- case 132: /* --help */
- usage (stdout, 0);
- break;
-
- default:
- usage (stderr, 2);
- }
- }
-
- /* Do error checking and look at other args. */
-
- if (copy_function == 0)
- {
- if (table_flag)
- copy_function = process_copy_in;
- else
- usage (stderr, 2);
- }
-
- if ((!table_flag || !verbose_flag) && numeric_uid)
- usage (stderr, 2);
-
- /* Work around for pcc bug. */
- copy_in = process_copy_in;
- copy_out = process_copy_out;
-
- if (copy_function == copy_in)
- {
- archive_des = 0;
- if (link_flag || reset_time_flag || xstat != lstat || append_flag
- || output_archive_name
- || (archive_name && input_archive_name))
- usage (stderr, 2);
- if (archive_format == arf_crcascii)
- crc_i_flag = TRUE;
- num_patterns = argc - optind;
- save_patterns = &argv[optind];
- if (input_archive_name)
- archive_name = input_archive_name;
- }
- else if (copy_function == copy_out)
- {
- archive_des = 1;
- if (argc != optind || create_dir_flag || rename_flag
- || table_flag || unconditional_flag || link_flag
- || retain_time_flag || no_chown_flag || set_owner_flag
- || set_group_flag || swap_bytes_flag || swap_halfwords_flag
- || (append_flag && !(archive_name || output_archive_name))
- || input_archive_name || (archive_name && output_archive_name))
- usage (stderr, 2);
- if (archive_format == arf_unknown)
- archive_format = arf_binary;
- if (output_archive_name)
- archive_name = output_archive_name;
- }
- else
- {
- /* Copy pass. */
- archive_des = -1;
- if (argc - 1 != optind || archive_format != arf_unknown
- || swap_bytes_flag || swap_halfwords_flag
- || table_flag || rename_flag || append_flag)
- usage (stderr, 2);
- directory_name = argv[optind];
- }
-
- if (archive_name)
- {
- if (copy_function != copy_in && copy_function != copy_out)
- usage (stderr, 2);
- archive_des = open_archive (archive_name);
- if (archive_des < 0)
- error (1, errno, "%s", archive_name);
- }
-
- #ifndef __MSDOS__
- /* Prevent SysV non-root users from giving away files inadvertantly.
- This happens automatically on BSD, where only root can give
- away files. */
- if (set_owner_flag == FALSE && set_group_flag == FALSE && geteuid ())
- no_chown_flag = TRUE;
- #endif
- }
-
- /* Initialize the input and output buffers to their proper size and
- initialize all variables associated with the input and output
- buffers. */
-
- void
- initialize_buffers ()
- {
- int buf_size;
-
- /* Make sure buffers can always hold 2 blocks and that they
- are big enough to hold 1 tar record (512 bytes) even if it
- is not aligned on a block boundary. The extra buffer space
- is needed by process_copyin and peek_in_buf to automatically
- figure out what kind of archive it is reading. */
-
- if (io_block_size >= 512)
- buf_size = 2 * io_block_size;
- else
- buf_size = 1024;
- input_buffer = (char *) xmalloc (buf_size);
- in_buff = input_buffer;
- input_size = 0;
- input_bytes = 0;
-
- /* Leave space for an `int' sentinel for `empty_output_buffer',
- in case we ever put back sparseness checking. */
- output_buffer = (char *) xmalloc (buf_size + sizeof (int) * 2);
- out_buff = output_buffer;
- output_size = 0;
- output_bytes = 0;
-
- /* Clear the block of zeros. */
- bzero (zeros_512, 512);
- }
-
- void
- main (argc, argv)
- int argc;
- char *argv[];
- {
- program_name = argv[0];
- umask (0);
-
- #ifdef __TURBOC__
- _fmode = O_BINARY; /* Put stdin and stdout in binary mode. */
- #endif
- #ifdef __EMX__ /* gcc on OS/2. */
- _response (&argc, &argv);
- _wildcard (&argc, &argv);
- #endif
-
- process_args (argc, argv);
-
- initialize_buffers ();
-
- (*copy_function) ();
-
- if (archive_des >= 0 && rmtclose (archive_des) == -1)
- error (1, errno, "error closing archive");
-
- exit (0);
- }
-