| 1 | /* minigzip.c -- simulate gzip using the zlib compression library
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| 2 | * Copyright (C) 1995-2006, 2010, 2011 Jean-loup Gailly.
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| 3 | * For conditions of distribution and use, see copyright notice in zlib.h
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * minigzip is a minimal implementation of the gzip utility. This is
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| 8 | * only an example of using zlib and isn't meant to replace the
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| 9 | * full-featured gzip. No attempt is made to deal with file systems
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| 10 | * limiting names to 14 or 8+3 characters, etc... Error checking is
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| 11 | * very limited. So use minigzip only for testing; use gzip for the
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| 12 | * real thing. On MSDOS, use only on file names without extension
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| 13 | * or in pipe mode.
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| 14 | */
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| 15 |
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| 16 | /* @(#) $Id: minigzip.c 40354 2012-03-05 13:39:00Z vboxsync $ */
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| 17 |
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| 18 | #include "zlib.h"
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| 19 | #include <stdio.h>
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| 20 |
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| 21 | #ifdef STDC
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| 22 | # include <string.h>
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| 23 | # include <stdlib.h>
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| 24 | #endif
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| 25 |
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| 26 | #ifdef USE_MMAP
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| 27 | # include <sys/types.h>
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| 28 | # include <sys/mman.h>
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| 29 | # include <sys/stat.h>
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| 30 | #endif
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| 31 |
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| 32 | #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
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| 33 | # include <fcntl.h>
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| 34 | # include <io.h>
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| 35 | # ifdef UNDER_CE
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| 36 | # include <stdlib.h>
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| 37 | # endif
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| 38 | # define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
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| 39 | #else
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| 40 | # define SET_BINARY_MODE(file)
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| 41 | #endif
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| 42 |
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| 43 | #ifdef VMS
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| 44 | # define unlink delete
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| 45 | # define GZ_SUFFIX "-gz"
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| 46 | #endif
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| 47 | #ifdef RISCOS
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| 48 | # define unlink remove
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| 49 | # define GZ_SUFFIX "-gz"
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| 50 | # define fileno(file) file->__file
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| 51 | #endif
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| 52 | #if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
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| 53 | # include <unix.h> /* for fileno */
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| 54 | #endif
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| 55 |
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| 56 | #if !defined(Z_HAVE_UNISTD_H) && !defined(_LARGEFILE64_SOURCE)
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| 57 | #ifndef WIN32 /* unlink already in stdio.h for WIN32 */
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| 58 | extern int unlink OF((const char *));
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| 59 | #endif
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| 60 | #endif
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| 61 |
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| 62 | #if defined(UNDER_CE)
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| 63 | # include <windows.h>
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| 64 | # define perror(s) pwinerror(s)
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| 65 |
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| 66 | /* Map the Windows error number in ERROR to a locale-dependent error
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| 67 | message string and return a pointer to it. Typically, the values
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| 68 | for ERROR come from GetLastError.
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| 69 |
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| 70 | The string pointed to shall not be modified by the application,
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| 71 | but may be overwritten by a subsequent call to strwinerror
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| 72 |
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| 73 | The strwinerror function does not change the current setting
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| 74 | of GetLastError. */
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| 75 |
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| 76 | static char *strwinerror (error)
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| 77 | DWORD error;
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| 78 | {
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| 79 | static char buf[1024];
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| 80 |
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| 81 | wchar_t *msgbuf;
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| 82 | DWORD lasterr = GetLastError();
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| 83 | DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM
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| 84 | | FORMAT_MESSAGE_ALLOCATE_BUFFER,
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| 85 | NULL,
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| 86 | error,
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| 87 | 0, /* Default language */
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| 88 | (LPVOID)&msgbuf,
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| 89 | 0,
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| 90 | NULL);
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| 91 | if (chars != 0) {
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| 92 | /* If there is an \r\n appended, zap it. */
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| 93 | if (chars >= 2
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| 94 | && msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') {
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| 95 | chars -= 2;
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| 96 | msgbuf[chars] = 0;
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| 97 | }
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| 98 |
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| 99 | if (chars > sizeof (buf) - 1) {
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| 100 | chars = sizeof (buf) - 1;
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| 101 | msgbuf[chars] = 0;
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| 102 | }
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| 103 |
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| 104 | wcstombs(buf, msgbuf, chars + 1);
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| 105 | LocalFree(msgbuf);
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| 106 | }
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| 107 | else {
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| 108 | sprintf(buf, "unknown win32 error (%ld)", error);
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| 109 | }
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| 110 |
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| 111 | SetLastError(lasterr);
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| 112 | return buf;
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| 113 | }
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| 114 |
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| 115 | static void pwinerror (s)
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| 116 | const char *s;
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| 117 | {
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| 118 | if (s && *s)
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| 119 | fprintf(stderr, "%s: %s\n", s, strwinerror(GetLastError ()));
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| 120 | else
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| 121 | fprintf(stderr, "%s\n", strwinerror(GetLastError ()));
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| 122 | }
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| 123 |
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| 124 | #endif /* UNDER_CE */
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| 125 |
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| 126 | #ifndef GZ_SUFFIX
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| 127 | # define GZ_SUFFIX ".gz"
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| 128 | #endif
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| 129 | #define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
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| 130 |
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| 131 | #define BUFLEN 16384
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| 132 | #define MAX_NAME_LEN 1024
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| 133 |
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| 134 | #ifdef MAXSEG_64K
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| 135 | # define local static
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| 136 | /* Needed for systems with limitation on stack size. */
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| 137 | #else
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| 138 | # define local
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| 139 | #endif
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| 140 |
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| 141 | #ifdef Z_SOLO
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| 142 | /* for Z_SOLO, create simplified gz* functions using deflate and inflate */
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| 143 |
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| 144 | #if defined(Z_HAVE_UNISTD_H) || defined(Z_LARGE)
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| 145 | # include <unistd.h> /* for unlink() */
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| 146 | #endif
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| 147 |
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| 148 | void *myalloc OF((void *, unsigned, unsigned));
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| 149 | void myfree OF((void *, void *));
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| 150 |
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| 151 | void *myalloc(q, n, m)
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| 152 | void *q;
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| 153 | unsigned n, m;
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| 154 | {
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| 155 | q = Z_NULL;
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| 156 | return calloc(n, m);
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| 157 | }
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| 158 |
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| 159 | void myfree(q, p)
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| 160 | void *q, *p;
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| 161 | {
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| 162 | q = Z_NULL;
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| 163 | free(p);
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| 164 | }
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| 165 |
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| 166 | typedef struct gzFile_s {
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| 167 | FILE *file;
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| 168 | int write;
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| 169 | int err;
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| 170 | char *msg;
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| 171 | z_stream strm;
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| 172 | } *gzFile;
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| 173 |
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| 174 | gzFile gzopen OF((const char *, const char *));
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| 175 | gzFile gzdopen OF((int, const char *));
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| 176 | gzFile gz_open OF((const char *, int, const char *));
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| 177 |
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| 178 | gzFile gzopen(path, mode)
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| 179 | const char *path;
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| 180 | const char *mode;
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| 181 | {
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| 182 | return gz_open(path, -1, mode);
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| 183 | }
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| 184 |
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| 185 | gzFile gzdopen(fd, mode)
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| 186 | int fd;
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| 187 | const char *mode;
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| 188 | {
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| 189 | return gz_open(NULL, fd, mode);
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| 190 | }
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| 191 |
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| 192 | gzFile gz_open(path, fd, mode)
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| 193 | const char *path;
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| 194 | int fd;
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| 195 | const char *mode;
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| 196 | {
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| 197 | gzFile gz;
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| 198 | int ret;
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| 199 |
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| 200 | gz = malloc(sizeof(gzFile));
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| 201 | if (gz == NULL)
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| 202 | return NULL;
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| 203 | gz->write = strchr(mode, 'w') != NULL;
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| 204 | gz->strm.zalloc = myalloc;
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| 205 | gz->strm.zfree = myfree;
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| 206 | gz->strm.opaque = Z_NULL;
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| 207 | if (gz->write)
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| 208 | ret = deflateInit2(&(gz->strm), -1, 8, 15 + 16, 8, 0);
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| 209 | else {
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| 210 | gz->strm.next_in = 0;
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| 211 | gz->strm.avail_in = Z_NULL;
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| 212 | ret = inflateInit2(&(gz->strm), 15 + 16);
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| 213 | }
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| 214 | if (ret != Z_OK) {
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| 215 | free(gz);
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| 216 | return NULL;
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| 217 | }
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| 218 | gz->file = path == NULL ? fdopen(fd, gz->write ? "wb" : "rb") :
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| 219 | fopen(path, gz->write ? "wb" : "rb");
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| 220 | if (gz->file == NULL) {
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| 221 | gz->write ? deflateEnd(&(gz->strm)) : inflateEnd(&(gz->strm));
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| 222 | free(gz);
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| 223 | return NULL;
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| 224 | }
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| 225 | gz->err = 0;
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| 226 | gz->msg = "";
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| 227 | return gz;
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| 228 | }
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| 229 |
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| 230 | int gzwrite OF((gzFile, const void *, unsigned));
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| 231 |
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| 232 | int gzwrite(gz, buf, len)
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| 233 | gzFile gz;
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| 234 | const void *buf;
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| 235 | unsigned len;
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| 236 | {
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| 237 | z_stream *strm;
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| 238 | unsigned char out[BUFLEN];
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| 239 |
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| 240 | if (gz == NULL || !gz->write)
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| 241 | return 0;
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| 242 | strm = &(gz->strm);
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| 243 | strm->next_in = (void *)buf;
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| 244 | strm->avail_in = len;
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| 245 | do {
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| 246 | strm->next_out = out;
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| 247 | strm->avail_out = BUFLEN;
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| 248 | (void)deflate(strm, Z_NO_FLUSH);
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| 249 | fwrite(out, 1, BUFLEN - strm->avail_out, gz->file);
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| 250 | } while (strm->avail_out == 0);
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| 251 | return len;
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| 252 | }
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| 253 |
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| 254 | int gzread OF((gzFile, void *, unsigned));
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| 255 |
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| 256 | int gzread(gz, buf, len)
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| 257 | gzFile gz;
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| 258 | void *buf;
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| 259 | unsigned len;
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| 260 | {
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| 261 | int ret;
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| 262 | unsigned got;
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| 263 | unsigned char in[1];
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| 264 | z_stream *strm;
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| 265 |
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| 266 | if (gz == NULL || gz->write)
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| 267 | return 0;
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| 268 | if (gz->err)
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| 269 | return 0;
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| 270 | strm = &(gz->strm);
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| 271 | strm->next_out = (void *)buf;
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| 272 | strm->avail_out = len;
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| 273 | do {
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| 274 | got = fread(in, 1, 1, gz->file);
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| 275 | if (got == 0)
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| 276 | break;
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| 277 | strm->next_in = in;
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| 278 | strm->avail_in = 1;
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| 279 | ret = inflate(strm, Z_NO_FLUSH);
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| 280 | if (ret == Z_DATA_ERROR) {
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| 281 | gz->err = Z_DATA_ERROR;
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| 282 | gz->msg = strm->msg;
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| 283 | return 0;
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| 284 | }
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| 285 | if (ret == Z_STREAM_END)
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| 286 | inflateReset(strm);
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| 287 | } while (strm->avail_out);
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| 288 | return len - strm->avail_out;
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| 289 | }
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| 290 |
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| 291 | int gzclose OF((gzFile));
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| 292 |
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| 293 | int gzclose(gz)
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| 294 | gzFile gz;
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| 295 | {
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| 296 | z_stream *strm;
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| 297 | unsigned char out[BUFLEN];
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| 298 |
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| 299 | if (gz == NULL)
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| 300 | return Z_STREAM_ERROR;
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| 301 | strm = &(gz->strm);
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| 302 | if (gz->write) {
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| 303 | strm->next_in = Z_NULL;
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| 304 | strm->avail_in = 0;
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| 305 | do {
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| 306 | strm->next_out = out;
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| 307 | strm->avail_out = BUFLEN;
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| 308 | (void)deflate(strm, Z_FINISH);
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| 309 | fwrite(out, 1, BUFLEN - strm->avail_out, gz->file);
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| 310 | } while (strm->avail_out == 0);
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| 311 | deflateEnd(strm);
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| 312 | }
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| 313 | else
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| 314 | inflateEnd(strm);
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| 315 | fclose(gz->file);
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| 316 | free(gz);
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| 317 | return Z_OK;
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| 318 | }
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| 319 |
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| 320 | const char *gzerror OF((gzFile, int *));
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| 321 |
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| 322 | const char *gzerror(gz, err)
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| 323 | gzFile gz;
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| 324 | int *err;
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| 325 | {
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| 326 | *err = gz->err;
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| 327 | return gz->msg;
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| 328 | }
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| 329 |
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| 330 | #endif
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| 331 |
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| 332 | char *prog;
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| 333 |
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| 334 | void error OF((const char *msg));
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| 335 | void gz_compress OF((FILE *in, gzFile out));
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| 336 | #ifdef USE_MMAP
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| 337 | int gz_compress_mmap OF((FILE *in, gzFile out));
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| 338 | #endif
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| 339 | void gz_uncompress OF((gzFile in, FILE *out));
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| 340 | void file_compress OF((char *file, char *mode));
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| 341 | void file_uncompress OF((char *file));
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| 342 | int main OF((int argc, char *argv[]));
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| 343 |
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| 344 | /* ===========================================================================
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| 345 | * Display error message and exit
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| 346 | */
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| 347 | void error(msg)
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| 348 | const char *msg;
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| 349 | {
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| 350 | fprintf(stderr, "%s: %s\n", prog, msg);
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| 351 | exit(1);
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| 352 | }
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| 353 |
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| 354 | /* ===========================================================================
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| 355 | * Compress input to output then close both files.
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| 356 | */
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| 357 |
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| 358 | void gz_compress(in, out)
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| 359 | FILE *in;
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| 360 | gzFile out;
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| 361 | {
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| 362 | local char buf[BUFLEN];
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| 363 | int len;
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| 364 | int err;
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| 365 |
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| 366 | #ifdef USE_MMAP
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| 367 | /* Try first compressing with mmap. If mmap fails (minigzip used in a
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| 368 | * pipe), use the normal fread loop.
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| 369 | */
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| 370 | if (gz_compress_mmap(in, out) == Z_OK) return;
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| 371 | #endif
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| 372 | for (;;) {
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| 373 | len = (int)fread(buf, 1, sizeof(buf), in);
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| 374 | if (ferror(in)) {
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| 375 | perror("fread");
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| 376 | exit(1);
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| 377 | }
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| 378 | if (len == 0) break;
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| 379 |
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| 380 | if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
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| 381 | }
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| 382 | fclose(in);
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| 383 | if (gzclose(out) != Z_OK) error("failed gzclose");
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| 384 | }
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| 385 |
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| 386 | #ifdef USE_MMAP /* MMAP version, Miguel Albrecht <[email protected]> */
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| 387 |
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| 388 | /* Try compressing the input file at once using mmap. Return Z_OK if
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| 389 | * if success, Z_ERRNO otherwise.
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| 390 | */
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| 391 | int gz_compress_mmap(in, out)
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| 392 | FILE *in;
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| 393 | gzFile out;
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| 394 | {
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| 395 | int len;
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| 396 | int err;
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| 397 | int ifd = fileno(in);
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| 398 | caddr_t buf; /* mmap'ed buffer for the entire input file */
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| 399 | off_t buf_len; /* length of the input file */
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| 400 | struct stat sb;
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| 401 |
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| 402 | /* Determine the size of the file, needed for mmap: */
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| 403 | if (fstat(ifd, &sb) < 0) return Z_ERRNO;
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| 404 | buf_len = sb.st_size;
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| 405 | if (buf_len <= 0) return Z_ERRNO;
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| 406 |
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| 407 | /* Now do the actual mmap: */
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| 408 | buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
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| 409 | if (buf == (caddr_t)(-1)) return Z_ERRNO;
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| 410 |
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| 411 | /* Compress the whole file at once: */
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| 412 | len = gzwrite(out, (char *)buf, (unsigned)buf_len);
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| 413 |
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| 414 | if (len != (int)buf_len) error(gzerror(out, &err));
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| 415 |
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| 416 | munmap(buf, buf_len);
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| 417 | fclose(in);
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| 418 | if (gzclose(out) != Z_OK) error("failed gzclose");
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| 419 | return Z_OK;
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| 420 | }
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| 421 | #endif /* USE_MMAP */
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| 422 |
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| 423 | /* ===========================================================================
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| 424 | * Uncompress input to output then close both files.
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| 425 | */
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| 426 | void gz_uncompress(in, out)
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| 427 | gzFile in;
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| 428 | FILE *out;
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| 429 | {
|
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| 430 | local char buf[BUFLEN];
|
|---|
| 431 | int len;
|
|---|
| 432 | int err;
|
|---|
| 433 |
|
|---|
| 434 | for (;;) {
|
|---|
| 435 | len = gzread(in, buf, sizeof(buf));
|
|---|
| 436 | if (len < 0) error (gzerror(in, &err));
|
|---|
| 437 | if (len == 0) break;
|
|---|
| 438 |
|
|---|
| 439 | if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {
|
|---|
| 440 | error("failed fwrite");
|
|---|
| 441 | }
|
|---|
| 442 | }
|
|---|
| 443 | if (fclose(out)) error("failed fclose");
|
|---|
| 444 |
|
|---|
| 445 | if (gzclose(in) != Z_OK) error("failed gzclose");
|
|---|
| 446 | }
|
|---|
| 447 |
|
|---|
| 448 |
|
|---|
| 449 | /* ===========================================================================
|
|---|
| 450 | * Compress the given file: create a corresponding .gz file and remove the
|
|---|
| 451 | * original.
|
|---|
| 452 | */
|
|---|
| 453 | void file_compress(file, mode)
|
|---|
| 454 | char *file;
|
|---|
| 455 | char *mode;
|
|---|
| 456 | {
|
|---|
| 457 | local char outfile[MAX_NAME_LEN];
|
|---|
| 458 | FILE *in;
|
|---|
| 459 | gzFile out;
|
|---|
| 460 |
|
|---|
| 461 | if (strlen(file) + strlen(GZ_SUFFIX) >= sizeof(outfile)) {
|
|---|
| 462 | fprintf(stderr, "%s: filename too long\n", prog);
|
|---|
| 463 | exit(1);
|
|---|
| 464 | }
|
|---|
| 465 |
|
|---|
| 466 | strcpy(outfile, file);
|
|---|
| 467 | strcat(outfile, GZ_SUFFIX);
|
|---|
| 468 |
|
|---|
| 469 | in = fopen(file, "rb");
|
|---|
| 470 | if (in == NULL) {
|
|---|
| 471 | perror(file);
|
|---|
| 472 | exit(1);
|
|---|
| 473 | }
|
|---|
| 474 | out = gzopen(outfile, mode);
|
|---|
| 475 | if (out == NULL) {
|
|---|
| 476 | fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
|
|---|
| 477 | exit(1);
|
|---|
| 478 | }
|
|---|
| 479 | gz_compress(in, out);
|
|---|
| 480 |
|
|---|
| 481 | unlink(file);
|
|---|
| 482 | }
|
|---|
| 483 |
|
|---|
| 484 |
|
|---|
| 485 | /* ===========================================================================
|
|---|
| 486 | * Uncompress the given file and remove the original.
|
|---|
| 487 | */
|
|---|
| 488 | void file_uncompress(file)
|
|---|
| 489 | char *file;
|
|---|
| 490 | {
|
|---|
| 491 | local char buf[MAX_NAME_LEN];
|
|---|
| 492 | char *infile, *outfile;
|
|---|
| 493 | FILE *out;
|
|---|
| 494 | gzFile in;
|
|---|
| 495 | size_t len = strlen(file);
|
|---|
| 496 |
|
|---|
| 497 | if (len + strlen(GZ_SUFFIX) >= sizeof(buf)) {
|
|---|
| 498 | fprintf(stderr, "%s: filename too long\n", prog);
|
|---|
| 499 | exit(1);
|
|---|
| 500 | }
|
|---|
| 501 |
|
|---|
| 502 | strcpy(buf, file);
|
|---|
| 503 |
|
|---|
| 504 | if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {
|
|---|
| 505 | infile = file;
|
|---|
| 506 | outfile = buf;
|
|---|
| 507 | outfile[len-3] = '\0';
|
|---|
| 508 | } else {
|
|---|
| 509 | outfile = file;
|
|---|
| 510 | infile = buf;
|
|---|
| 511 | strcat(infile, GZ_SUFFIX);
|
|---|
| 512 | }
|
|---|
| 513 | in = gzopen(infile, "rb");
|
|---|
| 514 | if (in == NULL) {
|
|---|
| 515 | fprintf(stderr, "%s: can't gzopen %s\n", prog, infile);
|
|---|
| 516 | exit(1);
|
|---|
| 517 | }
|
|---|
| 518 | out = fopen(outfile, "wb");
|
|---|
| 519 | if (out == NULL) {
|
|---|
| 520 | perror(file);
|
|---|
| 521 | exit(1);
|
|---|
| 522 | }
|
|---|
| 523 |
|
|---|
| 524 | gz_uncompress(in, out);
|
|---|
| 525 |
|
|---|
| 526 | unlink(infile);
|
|---|
| 527 | }
|
|---|
| 528 |
|
|---|
| 529 |
|
|---|
| 530 | /* ===========================================================================
|
|---|
| 531 | * Usage: minigzip [-c] [-d] [-f] [-h] [-r] [-1 to -9] [files...]
|
|---|
| 532 | * -c : write to standard output
|
|---|
| 533 | * -d : decompress
|
|---|
| 534 | * -f : compress with Z_FILTERED
|
|---|
| 535 | * -h : compress with Z_HUFFMAN_ONLY
|
|---|
| 536 | * -r : compress with Z_RLE
|
|---|
| 537 | * -1 to -9 : compression level
|
|---|
| 538 | */
|
|---|
| 539 |
|
|---|
| 540 | int main(argc, argv)
|
|---|
| 541 | int argc;
|
|---|
| 542 | char *argv[];
|
|---|
| 543 | {
|
|---|
| 544 | int copyout = 0;
|
|---|
| 545 | int uncompr = 0;
|
|---|
| 546 | gzFile file;
|
|---|
| 547 | char *bname, outmode[20];
|
|---|
| 548 |
|
|---|
| 549 | strcpy(outmode, "wb6 ");
|
|---|
| 550 |
|
|---|
| 551 | prog = argv[0];
|
|---|
| 552 | bname = strrchr(argv[0], '/');
|
|---|
| 553 | if (bname)
|
|---|
| 554 | bname++;
|
|---|
| 555 | else
|
|---|
| 556 | bname = argv[0];
|
|---|
| 557 | argc--, argv++;
|
|---|
| 558 |
|
|---|
| 559 | if (!strcmp(bname, "gunzip"))
|
|---|
| 560 | uncompr = 1;
|
|---|
| 561 | else if (!strcmp(bname, "zcat"))
|
|---|
| 562 | copyout = uncompr = 1;
|
|---|
| 563 |
|
|---|
| 564 | while (argc > 0) {
|
|---|
| 565 | if (strcmp(*argv, "-c") == 0)
|
|---|
| 566 | copyout = 1;
|
|---|
| 567 | else if (strcmp(*argv, "-d") == 0)
|
|---|
| 568 | uncompr = 1;
|
|---|
| 569 | else if (strcmp(*argv, "-f") == 0)
|
|---|
| 570 | outmode[3] = 'f';
|
|---|
| 571 | else if (strcmp(*argv, "-h") == 0)
|
|---|
| 572 | outmode[3] = 'h';
|
|---|
| 573 | else if (strcmp(*argv, "-r") == 0)
|
|---|
| 574 | outmode[3] = 'R';
|
|---|
| 575 | else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' &&
|
|---|
| 576 | (*argv)[2] == 0)
|
|---|
| 577 | outmode[2] = (*argv)[1];
|
|---|
| 578 | else
|
|---|
| 579 | break;
|
|---|
| 580 | argc--, argv++;
|
|---|
| 581 | }
|
|---|
| 582 | if (outmode[3] == ' ')
|
|---|
| 583 | outmode[3] = 0;
|
|---|
| 584 | if (argc == 0) {
|
|---|
| 585 | SET_BINARY_MODE(stdin);
|
|---|
| 586 | SET_BINARY_MODE(stdout);
|
|---|
| 587 | if (uncompr) {
|
|---|
| 588 | file = gzdopen(fileno(stdin), "rb");
|
|---|
| 589 | if (file == NULL) error("can't gzdopen stdin");
|
|---|
| 590 | gz_uncompress(file, stdout);
|
|---|
| 591 | } else {
|
|---|
| 592 | file = gzdopen(fileno(stdout), outmode);
|
|---|
| 593 | if (file == NULL) error("can't gzdopen stdout");
|
|---|
| 594 | gz_compress(stdin, file);
|
|---|
| 595 | }
|
|---|
| 596 | } else {
|
|---|
| 597 | if (copyout) {
|
|---|
| 598 | SET_BINARY_MODE(stdout);
|
|---|
| 599 | }
|
|---|
| 600 | do {
|
|---|
| 601 | if (uncompr) {
|
|---|
| 602 | if (copyout) {
|
|---|
| 603 | file = gzopen(*argv, "rb");
|
|---|
| 604 | if (file == NULL)
|
|---|
| 605 | fprintf(stderr, "%s: can't gzopen %s\n", prog, *argv);
|
|---|
| 606 | else
|
|---|
| 607 | gz_uncompress(file, stdout);
|
|---|
| 608 | } else {
|
|---|
| 609 | file_uncompress(*argv);
|
|---|
| 610 | }
|
|---|
| 611 | } else {
|
|---|
| 612 | if (copyout) {
|
|---|
| 613 | FILE * in = fopen(*argv, "rb");
|
|---|
| 614 |
|
|---|
| 615 | if (in == NULL) {
|
|---|
| 616 | perror(*argv);
|
|---|
| 617 | } else {
|
|---|
| 618 | file = gzdopen(fileno(stdout), outmode);
|
|---|
| 619 | if (file == NULL) error("can't gzdopen stdout");
|
|---|
| 620 |
|
|---|
| 621 | gz_compress(in, file);
|
|---|
| 622 | }
|
|---|
| 623 |
|
|---|
| 624 | } else {
|
|---|
| 625 | file_compress(*argv, outmode);
|
|---|
| 626 | }
|
|---|
| 627 | }
|
|---|
| 628 | } while (argv++, --argc);
|
|---|
| 629 | }
|
|---|
| 630 | return 0;
|
|---|
| 631 | }
|
|---|
