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 } 157