diff options
Diffstat (limited to 'gunzip.c')
| -rw-r--r-- | gunzip.c | 32 |
1 files changed, 16 insertions, 16 deletions
@@ -8,7 +8,8 @@ static const char gunzip_usage[] = "gunzip [OPTION]... FILE\n\n" "Uncompress FILE (or standard input if FILE is '-').\n\n" "Options:\n" - "\t-c\tWrite output to standard output\n"; + "\t-c\tWrite output to standard output\n" + "\t-t\tTest compressed file integrity\n"; /* gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface * Copyright (C) 1992-1993 Jean-loup Gailly @@ -653,7 +654,7 @@ DECLARE(uch, window, 2L*WSIZE); /* local variables */ -int force = 0; /* don't ask questions, compress links (-f) */ +int test_mode = 0; /* check file integrity option */ int foreground; /* set if program run in foreground */ int maxbits = BITS; /* max bits per code for LZW */ int method = DEFLATED;/* compression method */ @@ -714,6 +715,10 @@ int gunzip_main (int argc, char** argv) case 'c': to_stdout = 1; break; + case 't': + test_mode = 1; + break; + default: usage(gunzip_usage); } @@ -786,6 +791,9 @@ int gunzip_main (int argc, char** argv) /* Actually do the compression/decompression. */ unzip(inFileNum, outFileNum); + } else if (test_mode) { + /* Actually do the compression/decompression. */ + unzip(inFileNum, 2); } else { char* pos; @@ -857,17 +865,8 @@ local int get_method(in) uch flags; /* compression flags */ char magic[2]; /* magic header */ - /* If --force and --stdout, zcat == cat, so do not complain about - * premature end of file: use try_byte instead of get_byte. - */ - if (force) { - magic[0] = (char)try_byte(); - magic[1] = (char)try_byte(); - /* If try_byte returned EOF, magic[1] == 0xff */ - } else { - magic[0] = (char)get_byte(); - magic[1] = (char)get_byte(); - } + magic[0] = (char)get_byte(); + magic[1] = (char)get_byte(); method = -1; /* unknown yet */ part_nb++; /* number of parts in gzip file */ header_bytes = 0; @@ -1188,7 +1187,8 @@ void flush_outbuf() { if (outcnt == 0) return; - write_buf(ofd, (char *)outbuf, outcnt); + if (!test_mode) + write_buf(ofd, (char *)outbuf, outcnt); bytes_out += (ulg)outcnt; outcnt = 0; } @@ -1202,8 +1202,8 @@ void flush_window() if (outcnt == 0) return; updcrc(window, outcnt); - write_buf(ofd, (char *)window, outcnt); - + if (!test_mode) + write_buf(ofd, (char *)window, outcnt); bytes_out += (ulg)outcnt; outcnt = 0; } |