contrib/libarchive/cat/bsdcat.c

   1 /*-
   2  * Copyright (c) 2011-2014, Mike Kazantsev
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "bsdcat_platform.h"
  27 __FBSDID("$FreeBSD$");
  28
  29 #include <stdio.h>
  30 #ifdef HAVE_STDLIB_H
  31 #include <stdlib.h>
  32 #endif
  33 #ifdef HAVE_UNISTD_H
  34 #include <unistd.h>
  35 #endif
  36 #ifdef HAVE_STRING_H
  37 #include <string.h>
  38 #endif
  39
  40 #include "bsdcat.h"
  41 #include "err.h"
  42
  43 #define BYTES_PER_BLOCK (20*512)
  44
  45 static struct archive *a;
  46 static struct archive_entry *ae;
  47 static const char *bsdcat_current_path;
  48 static int exit_status = 0;
  49
  50
  51 void
  52 usage(FILE *stream, int eval)
  53 {
  54         const char *p;
  55         p = lafe_getprogname();
  56         fprintf(stream,
  57             "Usage: %s [-h] [--help] [--version] [--] [filenames...]\n", p);
  58         exit(eval);
  59 }
  60
  61 static void
  62 version(void)
  63 {
  64         printf("bsdcat %s - %s \n",
  65             BSDCAT_VERSION_STRING,
  66             archive_version_details());
  67         exit(0);
  68 }
  69
  70 void
  71 bsdcat_next(void)
  72 {
  73         if (a != NULL) {
  74                 if (archive_read_close(a) != ARCHIVE_OK)
  75                         bsdcat_print_error();
  76                 archive_read_free(a);
  77         }
  78
  79         a = archive_read_new();
  80         archive_read_support_filter_all(a);
  81         archive_read_support_format_empty(a);
  82         archive_read_support_format_raw(a);
  83 }
  84
  85 void
  86 bsdcat_print_error(void)
  87 {
  88         lafe_warnc(0, "%s: %s",
  89             bsdcat_current_path, archive_error_string(a));
  90         exit_status = 1;
  91 }
  92
  93 void
  94 bsdcat_read_to_stdout(const char* filename)
  95 {
  96         int r;
  97
  98         if (archive_read_open_filename(a, filename, BYTES_PER_BLOCK)
  99             != ARCHIVE_OK)
 100                 bsdcat_print_error();
 101         else if (r = archive_read_next_header(a, &ae),
 102                  r != ARCHIVE_OK && r != ARCHIVE_EOF)
 103                 bsdcat_print_error();
 104         else if (r == ARCHIVE_EOF)
 105                 /* for empty payloads don't try and read data */
 106                 ;
 107         else if (archive_read_data_into_fd(a, 1) != ARCHIVE_OK)
 108                 bsdcat_print_error();
 109         if (archive_read_close(a) != ARCHIVE_OK)
 110                 bsdcat_print_error();
 111         archive_read_free(a);
 112         a = NULL;
 113 }
 114
 115 int
 116 main(int argc, char **argv)
 117 {
 118         struct bsdcat *bsdcat, bsdcat_storage;
 119         int c;
 120
 121         bsdcat = &bsdcat_storage;
 122         memset(bsdcat, 0, sizeof(*bsdcat));
 123
 124         lafe_setprogname(*argv, "bsdcat");
 125
 126         bsdcat->argv = argv;
 127         bsdcat->argc = argc;
 128
 129         while ((c = bsdcat_getopt(bsdcat)) != -1) {
 130                 switch (c) {
 131                 case 'h':
 132                         usage(stdout, 0);
 133                         break;
 134                 case OPTION_VERSION:
 135                         version();
 136                         break;
 137                 default:
 138                         usage(stderr, 1);
 139                 }
 140         }
 141
 142         bsdcat_next();
 143         if (*bsdcat->argv == NULL) {
 144                 bsdcat_current_path = "<stdin>";
 145                 bsdcat_read_to_stdout(NULL);
 146         } else {
 147                 while (*bsdcat->argv) {
 148                         bsdcat_current_path = *bsdcat->argv++;
 149                         bsdcat_read_to_stdout(bsdcat_current_path);
 150                         bsdcat_next();
 151                 }
 152                 archive_read_free(a); /* Help valgrind & friends */
 153         }
 154
 155         exit(exit_status);
 156 }