1 | /* |
1 | /* |
2 | * Copyright (c) 2000-2003 Marc Alexander Lehmann <pcg@goof.com> |
2 | * Copyright (c) 2006 Stefan Traby <stefan@hello-penguin.com> |
3 | * |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
4 | * Redistribution and use in source and binary forms, with or without modifica- |
5 | * tion, are permitted provided that the following conditions are met: |
5 | * tion, are permitted provided that the following conditions are met: |
6 | * |
6 | * |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
7 | * 1. Redistributions of source code must retain the above copyright notice, |
… | |
… | |
22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | * |
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28 | * Alternatively, the contents of this file may be used under the terms of |
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29 | * the GNU General Public License version 2 (the "GPL"), in which case the |
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30 | * provisions of the GPL are applicable instead of the above. If you wish to |
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31 | * allow the use of your version of this file only under the terms of the |
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32 | * GPL and not to allow others to use your version of this file under the |
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33 | * BSD license, indicate your decision by deleting the provisions above and |
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34 | * replace them with the notice and other provisions required by the GPL. If |
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35 | * you do not delete the provisions above, a recipient may use your version |
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36 | * of this file under either the BSD or the GPL License. |
27 | */ |
37 | */ |
28 | |
38 | |
29 | #include "config.h" |
39 | #include "config.h" |
30 | |
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31 | #include <stdio.h> |
40 | #include <stdio.h> |
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41 | #include <string.h> |
32 | #include <stdlib.h> |
42 | #include <stdlib.h> |
33 | #include <assert.h> |
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34 | |
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35 | #include <unistd.h> |
43 | #include <unistd.h> |
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44 | #include <sys/types.h> |
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45 | #include <sys/stat.h> |
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46 | #include <fcntl.h> |
36 | #include <getopt.h> |
47 | #include <errno.h> |
37 | |
48 | #include <limits.h> |
38 | #include "lzf.h" |
49 | #include "lzf.h" |
39 | |
50 | |
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51 | #ifdef HAVE_GETOPT_H |
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52 | # include <getopt.h> |
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53 | #endif |
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54 | |
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55 | #define BLOCKSIZE (1024 * 64 - 1) |
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56 | #define MAX_BLOCKSIZE BLOCKSIZE |
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57 | |
40 | typedef unsigned char u8; |
58 | typedef unsigned char u8; |
41 | |
59 | |
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60 | static off_t nr_read, nr_written; |
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61 | |
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62 | static const char *imagename; |
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63 | static enum { compress, uncompress, lzcat } mode = compress; |
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64 | static int verbose = 0; |
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65 | static int force = 0; |
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66 | static long blocksize = BLOCKSIZE; |
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67 | |
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68 | #ifdef HAVE_GETOPT_LONG |
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69 | |
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70 | struct option longopts[] = { |
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71 | {"compress", 0, 0, 'c'}, |
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72 | {"decompress", 0, 0, 'd'}, |
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73 | {"uncompress", 0, 0, 'd'}, |
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74 | {"force", 0, 0, 'f'}, |
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75 | {"help", 0, 0, 'h'}, |
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76 | {"verbose", 0, 0, 'v'}, |
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77 | {"blocksize", 1, 0, 'b'}, |
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78 | {0, 0, 0, 0} |
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79 | }; |
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80 | |
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81 | static const char *opt = |
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82 | "-c --compress compress\n" |
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83 | "-d --decompress decompress\n" |
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84 | "-f --force force overwrite of output file\n" |
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85 | "-h --help give this help\n" "-v --verbose verbose mode\n" "-b # --blocksize # set blocksize\n" "\n"; |
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86 | |
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87 | #else |
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88 | |
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89 | static const char *opt = |
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90 | "-c compress\n" |
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91 | "-d decompress\n" |
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92 | "-f force overwrite of output file\n" |
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93 | "-h give this help\n" |
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94 | "-v verbose mode\n" |
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95 | "-b # set blocksize\n" |
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96 | "\n"; |
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97 | |
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98 | #endif |
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99 | |
42 | static void |
100 | static void |
43 | usage (int ec) |
101 | usage (int rc) |
44 | { |
102 | { |
45 | fprintf (stderr, "\n" |
103 | fprintf (stderr, "\n" |
46 | "lzf, a very lightweight compression/decompression filter\n" |
104 | "lzf, a very lightweight compression/decompression utility written by Stefan Traby.\n" |
47 | "written by Marc Lehmann <pcg@goof.com> You can find more info at\n" |
105 | "uses liblzf written by Marc Lehmann <schmorp@schmorp.de> You can find more info at\n" |
48 | "http://liblzf.plan9.de/\n" |
106 | "http://liblzf.plan9.de/\n" |
49 | "\n" |
107 | "\n" |
50 | "USAGE: lzf -c [-b blocksize] | -d\n" |
108 | "usage: lzf [-dufhvb] [file ...]\n" |
51 | " -c compress\n" |
109 | " unlzf [file ...]\n" |
52 | " -d decompress\n" |
110 | " lzcat [file ...]\n" |
53 | " -b specify the blocksize (default 64k-1)\n" |
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54 | "\n" |
111 | "\n%s", |
55 | ); |
112 | opt); |
56 | |
113 | |
57 | exit (ec); |
114 | exit (rc); |
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115 | } |
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116 | |
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117 | static inline ssize_t |
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118 | rread (int fd, void *buf, size_t len) |
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119 | { |
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120 | ssize_t rc = 0, offset = 0; |
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121 | char *p = buf; |
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122 | |
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123 | while (len && (rc = read (fd, &p[offset], len)) > 0) |
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124 | { |
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125 | offset += rc; |
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126 | len -= rc; |
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127 | } |
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128 | |
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129 | nr_read += offset; |
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130 | |
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131 | if (rc < 0) |
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132 | return rc; |
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133 | |
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134 | return offset; |
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135 | } |
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136 | |
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137 | /* returns 0 if all written else -1 */ |
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138 | static inline ssize_t |
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139 | wwrite (int fd, void *buf, size_t len) |
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140 | { |
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141 | ssize_t rc; |
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142 | char *b = buf; |
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143 | size_t l = len; |
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144 | |
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145 | while (l) |
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146 | { |
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147 | rc = write (fd, b, l); |
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148 | if (rc < 0) |
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149 | { |
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150 | fprintf (stderr, "%s: write error: ", imagename); |
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151 | perror (""); |
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152 | return -1; |
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153 | } |
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154 | |
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155 | l -= rc; |
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156 | b += rc; |
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157 | } |
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158 | |
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159 | nr_written += len; |
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160 | return 0; |
58 | } |
161 | } |
59 | |
162 | |
60 | /* |
163 | /* |
61 | * Anatomy: an lzf file consists of any number of blocks in the following format: |
164 | * Anatomy: an lzf file consists of any number of blocks in the following format: |
62 | * |
165 | * |
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166 | * \x00 EOF (optional) |
63 | * "ZV\0" 2-byte-usize <uncompressed data> |
167 | * "ZV\0" 2-byte-usize <uncompressed data> |
64 | * "ZV\1" 2-byte-csize 2-byte-usize <compressed data> |
168 | * "ZV\1" 2-byte-csize 2-byte-usize <compressed data> |
65 | * "ZV\2" 4-byte-crc32-0xdebb20e3 (NYI) |
169 | * "ZV\2" 4-byte-crc32-0xdebb20e3 (NYI) |
66 | * |
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67 | */ |
170 | */ |
68 | |
171 | |
69 | static void compress (unsigned int blocksize) |
172 | |
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173 | #define TYPE0_HDR_SIZE 5 |
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174 | #define TYPE1_HDR_SIZE 7 |
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175 | #define MAX_HDR_SIZE 7 |
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176 | #define MIN_HDR_SIZE 5 |
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177 | |
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178 | static int |
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179 | compress_fd (int from, int to) |
70 | { |
180 | { |
71 | ssize_t us; |
181 | ssize_t us, cs, len; |
72 | unsigned int cs; |
182 | u8 buf1[MAX_BLOCKSIZE + MAX_HDR_SIZE + 16]; |
73 | u8 buff1[64*1024]; |
183 | u8 buf2[MAX_BLOCKSIZE + MAX_HDR_SIZE + 16]; |
74 | u8 buff2[64*1024]; |
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75 | u8 header[3+2+2]; |
184 | u8 *header; |
76 | |
185 | |
77 | header[0] = 'Z'; |
186 | nr_read = nr_written = 0; |
78 | header[1] = 'V'; |
187 | while ((us = rread (from, &buf1[MAX_HDR_SIZE], blocksize)) > 0) |
79 | |
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80 | for(;;) { |
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81 | us = fread (buff1, 1, blocksize, stdin); |
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82 | |
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83 | if (us < blocksize) |
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84 | { |
188 | { |
85 | if (us == 0) |
189 | cs = lzf_compress (&buf1[MAX_HDR_SIZE], us, &buf2[MAX_HDR_SIZE], us > 4 ? us - 4 : us); |
86 | break; |
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87 | else if (!feof (stdin)) |
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88 | { |
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89 | perror ("compress"); |
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90 | exit (1); |
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91 | } |
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92 | } |
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93 | |
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94 | cs = lzf_compress (buff1, us, buff2, us - 4); |
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95 | |
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96 | if (cs) |
190 | if (cs) |
97 | { |
191 | { |
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192 | header = &buf2[MAX_HDR_SIZE - TYPE1_HDR_SIZE]; |
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193 | header[0] = 'Z'; |
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194 | header[1] = 'V'; |
98 | header[2] = 1; |
195 | header[2] = 1; |
99 | header[3] = cs >> 8; |
196 | header[3] = cs >> 8; |
100 | header[4] = cs & 0xff; |
197 | header[4] = cs & 0xff; |
101 | header[5] = us >> 8; |
198 | header[5] = us >> 8; |
102 | header[6] = us & 0xff; |
199 | header[6] = us & 0xff; |
103 | |
200 | len = cs + TYPE1_HDR_SIZE; |
104 | fwrite (header, 3+2+2, 1, stdout); |
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105 | fwrite (buff2, cs, 1, stdout); |
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106 | } |
201 | } |
107 | else |
202 | else |
108 | { |
203 | { // write uncompressed |
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204 | header = &buf1[MAX_HDR_SIZE - TYPE0_HDR_SIZE]; |
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205 | header[0] = 'Z'; |
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206 | header[1] = 'V'; |
109 | header[2] = 0; |
207 | header[2] = 0; |
110 | header[3] = us >> 8; |
208 | header[3] = us >> 8; |
111 | header[4] = us & 0xff; |
209 | header[4] = us & 0xff; |
112 | |
210 | len = us + TYPE0_HDR_SIZE; |
113 | fwrite (header, 3+2, 1, stdout); |
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114 | fwrite (buff1, us, 1, stdout); |
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115 | } |
211 | } |
116 | } while (!feof (stdin)); |
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117 | } |
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118 | |
212 | |
119 | static void decompress (void) |
213 | if (wwrite (to, header, len) == -1) |
120 | { |
214 | return -1; |
121 | ssize_t us; |
215 | } |
122 | unsigned int cs; |
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123 | u8 buff1[64*1024]; |
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124 | u8 buff2[64*1024]; |
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125 | u8 header[3+2+2]; |
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126 | |
216 | |
127 | for(;;) { |
217 | return 0; |
128 | if (fread (header, 3+2, 1, stdin) != 1) |
218 | } |
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219 | |
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220 | static int |
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221 | uncompress_fd (int from, int to) |
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222 | { |
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223 | u8 header[MAX_HDR_SIZE]; |
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224 | u8 buf1[MAX_BLOCKSIZE + MAX_HDR_SIZE + 16]; |
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225 | u8 buf2[MAX_BLOCKSIZE + MAX_HDR_SIZE + 16]; |
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226 | u8 *p; |
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227 | int l, rd; |
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228 | ssize_t rc, cs, us, bytes, over = 0; |
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229 | |
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230 | nr_read = nr_written = 0; |
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231 | while (1) |
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232 | { |
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233 | rc = rread (from, header + over, MAX_HDR_SIZE - over); |
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234 | if (rc < 0) |
129 | { |
235 | { |
130 | if (feof (stdin)) |
236 | fprintf (stderr, "%s: read error: ", imagename); |
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237 | perror (""); |
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238 | return -1; |
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239 | } |
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240 | |
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241 | rc += over; |
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242 | over = 0; |
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243 | if (!rc || header[0] == 0) |
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244 | return 0; |
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245 | |
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246 | if (rc < MIN_HDR_SIZE || header[0] != 'Z' || header[1] != 'V') |
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247 | { |
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248 | fprintf (stderr, "%s: invalid data stream - magic not found or short header\n", imagename); |
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249 | return -1; |
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250 | } |
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251 | |
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252 | switch (header[2]) |
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253 | { |
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254 | case 0: |
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255 | cs = -1; |
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256 | us = (header[3] << 8) | header[4]; |
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257 | p = &header[TYPE0_HDR_SIZE]; |
131 | break; |
258 | break; |
132 | else |
259 | case 1: |
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260 | if (rc < TYPE1_HDR_SIZE) |
133 | { |
261 | { |
134 | perror ("decompress"); |
262 | goto short_read; |
135 | exit (1); |
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136 | } |
263 | } |
137 | } |
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138 | |
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139 | if (header[0] != 'Z' || header[1] != 'V') |
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140 | { |
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141 | fprintf (stderr, "decompress: invalid stream - no magic number found\n"); |
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142 | exit (1); |
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143 | } |
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144 | |
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145 | cs = (header[3] << 8) | header[4]; |
264 | cs = (header[3] << 8) | header[4]; |
146 | |
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147 | if (header[2] == 1) |
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148 | { |
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149 | if (fread (header+3+2, 2, 1, stdin) != 1) |
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150 | { |
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151 | perror ("decompress"); |
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152 | exit (1); |
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153 | } |
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154 | |
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155 | us = (header[5] << 8) | header[6]; |
265 | us = (header[5] << 8) | header[6]; |
156 | |
266 | p = &header[TYPE1_HDR_SIZE]; |
157 | if (fread (buff1, cs, 1, stdin) != 1) |
267 | break; |
158 | { |
268 | default: |
159 | perror ("decompress"); |
269 | fprintf (stderr, "%s: unknown blocktype\n", imagename); |
160 | exit (1); |
270 | return -1; |
161 | } |
271 | } |
162 | |
272 | |
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273 | bytes = cs == -1 ? us : cs; |
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274 | l = &header[rc] - p; |
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275 | |
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276 | if (l > 0) |
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277 | memcpy (buf1, p, l); |
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278 | |
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279 | if (l > bytes) |
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280 | { |
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281 | over = l - bytes; |
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282 | memmove (header, &p[bytes], over); |
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283 | } |
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284 | |
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285 | p = &buf1[l]; |
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286 | rd = bytes - l; |
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287 | if (rd > 0) |
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288 | if ((rc = rread (from, p, rd)) != rd) |
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289 | goto short_read; |
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290 | |
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291 | if (cs == -1) |
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292 | { |
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293 | if (wwrite (to, buf1, us)) |
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294 | return -1; |
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295 | } |
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296 | else |
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297 | { |
163 | if (lzf_decompress (buff1, cs, buff2, us) != us) |
298 | if (lzf_decompress (buf1, cs, buf2, us) != us) |
164 | { |
299 | { |
165 | fprintf (stderr, "decompress: invalid stream - data corrupted\n"); |
300 | fprintf (stderr, "%s: decompress: invalid stream - data corrupted\n", imagename); |
166 | exit (1); |
301 | return -1; |
167 | } |
302 | } |
168 | |
303 | |
169 | fwrite (buff2, us, 1, stdout); |
304 | if (wwrite (to, buf2, us)) |
170 | } |
305 | return -1; |
171 | else if (header[2] == 0) |
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172 | { |
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173 | if (fread (buff2, cs, 1, stdin) != 1) |
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174 | { |
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175 | perror ("decompress"); |
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176 | exit (1); |
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177 | } |
306 | } |
178 | |
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179 | fwrite (buff2, cs, 1, stdout); |
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180 | } |
307 | } |
181 | else |
308 | |
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309 | return 0; |
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310 | |
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311 | short_read: |
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312 | fprintf (stderr, "%s: short data\n", imagename); |
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313 | return -1; |
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314 | } |
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315 | |
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316 | static int |
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317 | open_out (const char *name) |
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318 | { |
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319 | int fd; |
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320 | int m = O_EXCL; |
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321 | |
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322 | if (force) |
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323 | m = 0; |
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324 | |
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325 | fd = open (name, O_CREAT | O_WRONLY | O_TRUNC | m, 600); |
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326 | return fd; |
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327 | } |
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328 | |
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329 | static int |
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330 | compose_name (const char *fname, char *oname) |
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331 | { |
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332 | char *p; |
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333 | |
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334 | if (mode == compress) |
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335 | { |
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336 | if (strlen (fname) > PATH_MAX - 4) |
182 | { |
337 | { |
183 | fprintf (stderr, "decompress: invalid stream - unknown block type\n"); |
338 | fprintf (stderr, "%s: %s.lzf: name too long", imagename, fname); |
184 | exit (1); |
339 | return -1; |
185 | } |
340 | } |
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341 | |
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342 | strcpy (oname, fname); |
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343 | strcat (oname, ".lzf"); |
186 | } |
344 | } |
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345 | else |
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346 | { |
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347 | if (strlen (fname) > PATH_MAX) |
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348 | { |
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349 | fprintf (stderr, "%s: %s: name too long\n", imagename, fname); |
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350 | return -1; |
|
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351 | } |
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352 | |
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353 | strcpy (oname, fname); |
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354 | p = &oname[strlen (oname)] - 4; |
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355 | if (p < oname || strcmp (p, ".lzf")) |
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356 | { |
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357 | fprintf (stderr, "%s: %s: unknown suffix\n", imagename, fname); |
|
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358 | return -1; |
|
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359 | } |
|
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360 | |
|
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361 | *p = 0; |
|
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362 | } |
|
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363 | |
|
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364 | return 0; |
|
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365 | } |
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366 | |
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367 | static int |
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368 | run_file (const char *fname) |
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369 | { |
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370 | int fd, fd2; |
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371 | int rc; |
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372 | struct stat mystat; |
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373 | char oname[PATH_MAX + 1]; |
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374 | |
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375 | if (mode != lzcat) |
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376 | if (compose_name (fname, oname)) |
|
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377 | return -1; |
|
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378 | |
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379 | rc = lstat (fname, &mystat); |
|
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380 | fd = open (fname, O_RDONLY); |
|
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381 | if (rc || fd == -1) |
|
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382 | { |
|
|
383 | fprintf (stderr, "%s: %s: ", imagename, fname); |
|
|
384 | perror (""); |
|
|
385 | return -1; |
|
|
386 | } |
|
|
387 | |
|
|
388 | if (!S_ISREG (mystat.st_mode)) |
|
|
389 | { |
|
|
390 | fprintf (stderr, "%s: %s: not a regular file.\n", imagename, fname); |
|
|
391 | close (fd); |
|
|
392 | return -1; |
|
|
393 | } |
|
|
394 | |
|
|
395 | if (mode == lzcat) |
|
|
396 | { |
|
|
397 | rc = uncompress_fd (fd, 1); |
|
|
398 | close (fd); |
|
|
399 | return rc; |
|
|
400 | } |
|
|
401 | |
|
|
402 | fd2 = open_out (oname); |
|
|
403 | if (fd2 == -1) |
|
|
404 | { |
|
|
405 | fprintf (stderr, "%s: %s: ", imagename, oname); |
|
|
406 | perror (""); |
|
|
407 | close (fd); |
|
|
408 | return -1; |
|
|
409 | } |
|
|
410 | |
|
|
411 | if (mode == compress) |
|
|
412 | { |
|
|
413 | rc = compress_fd (fd, fd2); |
|
|
414 | if (!rc && verbose) |
|
|
415 | fprintf (stderr, "%s: %5.1f%% -- replaced with %s\n", |
|
|
416 | fname, nr_read == 0 ? 0 : 100.0 - nr_written / ((double) nr_read / 100.0), oname); |
|
|
417 | } |
|
|
418 | else |
|
|
419 | { |
|
|
420 | rc = uncompress_fd (fd, fd2); |
|
|
421 | if (!rc && verbose) |
|
|
422 | fprintf (stderr, "%s: %5.1f%% -- replaced with %s\n", |
|
|
423 | fname, nr_written == 0 ? 0 : 100.0 - nr_read / ((double) nr_written / 100.0), oname); |
|
|
424 | } |
|
|
425 | |
|
|
426 | fchmod (fd2, mystat.st_mode); |
|
|
427 | close (fd); |
|
|
428 | close (fd2); |
|
|
429 | |
|
|
430 | if (!rc) |
|
|
431 | unlink (fname); |
|
|
432 | |
|
|
433 | return rc; |
187 | } |
434 | } |
188 | |
435 | |
189 | int |
436 | int |
190 | main (int argc, char *argv[]) |
437 | main (int argc, char *argv[]) |
191 | { |
438 | { |
|
|
439 | char *p = argv[0]; |
192 | int c; |
440 | int optc; |
193 | unsigned int blocksize = 64*1024-1; |
441 | int rc = 0; |
194 | enum { m_compress, m_decompress } mode = m_compress; |
|
|
195 | |
442 | |
|
|
443 | errno = 0; |
|
|
444 | p = getenv ("LZF_BLOCKSIZE"); |
|
|
445 | if (p) |
|
|
446 | { |
|
|
447 | blocksize = strtoul (p, 0, 0); |
|
|
448 | if (errno || !blocksize || blocksize > MAX_BLOCKSIZE) |
|
|
449 | blocksize = BLOCKSIZE; |
|
|
450 | } |
|
|
451 | |
|
|
452 | p = strrchr (argv[0], '/'); |
|
|
453 | imagename = p ? ++p : argv[0]; |
|
|
454 | |
|
|
455 | if (!strncmp (imagename, "un", 2) || !strncmp (imagename, "de", 2)) |
|
|
456 | mode = uncompress; |
|
|
457 | |
|
|
458 | if (strstr (imagename, "cat")) |
|
|
459 | mode = lzcat; |
|
|
460 | |
|
|
461 | #ifdef HAVE_GETOPT_LONG |
|
|
462 | while ((optc = getopt_long (argc, argv, "cdfhvb:", longopts, 0)) != -1) |
|
|
463 | #else |
196 | while ((c = getopt (argc, argv, "cdb:h")) != -1) |
464 | while ((optc = getopt (argc, argv, "cdfhvb:")) != -1) |
|
|
465 | #endif |
|
|
466 | { |
197 | switch (c) |
467 | switch (optc) |
198 | { |
468 | { |
199 | case 'c': |
469 | case 'c': |
200 | mode = m_compress; |
470 | mode = compress; |
201 | break; |
471 | break; |
202 | |
|
|
203 | case 'd': |
472 | case 'd': |
204 | mode = m_decompress; |
473 | mode = uncompress; |
205 | break; |
474 | break; |
206 | |
|
|
207 | case 'b': |
475 | case 'f': |
208 | blocksize = atol (optarg); |
476 | force = 1; |
209 | break; |
477 | break; |
210 | |
|
|
211 | case 'h': |
478 | case 'h': |
212 | usage (0); |
479 | usage (0); |
213 | |
480 | break; |
214 | case ':': |
|
|
215 | fprintf (stderr, "required argument missing, use -h\n"); |
|
|
216 | exit (1); |
|
|
217 | |
|
|
218 | case '?': |
481 | case 'v': |
219 | fprintf (stderr, "unknown option, use -h\n"); |
482 | verbose = 1; |
220 | exit (1); |
483 | break; |
221 | |
484 | case 'b': |
|
|
485 | errno = 0; |
|
|
486 | blocksize = strtoul (optarg, 0, 0); |
|
|
487 | if (errno || !blocksize || blocksize > MAX_BLOCKSIZE) |
|
|
488 | blocksize = BLOCKSIZE; |
|
|
489 | break; |
222 | default: |
490 | default: |
223 | usage (1); |
491 | usage (1); |
|
|
492 | break; |
224 | } |
493 | } |
|
|
494 | } |
225 | |
495 | |
|
|
496 | if (optind == argc) |
|
|
497 | { // stdin stdout |
|
|
498 | if (!force) |
|
|
499 | { |
|
|
500 | if ((mode == uncompress || mode == lzcat) && isatty (0)) |
|
|
501 | { |
|
|
502 | fprintf (stderr, "%s: compressed data not read from a terminal. Use -f to force decompression.\n", imagename); |
|
|
503 | exit (1); |
|
|
504 | } |
|
|
505 | if (mode == compress && isatty (1)) |
|
|
506 | { |
|
|
507 | fprintf (stderr, "%s: compressed data not written to a terminal. Use -f to force compression.\n", imagename); |
|
|
508 | exit (1); |
|
|
509 | } |
|
|
510 | } |
|
|
511 | |
226 | if (mode == m_compress) |
512 | if (mode == compress) |
227 | compress (blocksize); |
513 | rc = compress_fd (0, 1); |
228 | else if (mode == m_decompress) |
|
|
229 | decompress (); |
|
|
230 | else |
514 | else |
231 | abort (); |
515 | rc = uncompress_fd (0, 1); |
232 | |
516 | |
233 | return 0; |
517 | exit (rc ? 1 : 0); |
|
|
518 | } |
|
|
519 | |
|
|
520 | while (optind < argc) |
|
|
521 | rc |= run_file (argv[optind++]); |
|
|
522 | |
|
|
523 | exit (rc ? 1 : 0); |
234 | } |
524 | } |
|
|
525 | |