| /* gun.c -- simple gunzip to give an example of the use of inflateBack() | |
| * Copyright (C) 2003, 2005, 2008, 2010, 2012 Mark Adler | |
| * For conditions of distribution and use, see copyright notice in zlib.h | |
| Version 1.7 12 August 2012 Mark Adler */ | |
| /* Version history: | |
| 1.0 16 Feb 2003 First version for testing of inflateBack() | |
| 1.1 21 Feb 2005 Decompress concatenated gzip streams | |
| Remove use of "this" variable (C++ keyword) | |
| Fix return value for in() | |
| Improve allocation failure checking | |
| Add typecasting for void * structures | |
| Add -h option for command version and usage | |
| Add a bunch of comments | |
| 1.2 20 Mar 2005 Add Unix compress (LZW) decompression | |
| Copy file attributes from input file to output file | |
| 1.3 12 Jun 2005 Add casts for error messages [Oberhumer] | |
| 1.4 8 Dec 2006 LZW decompression speed improvements | |
| 1.5 9 Feb 2008 Avoid warning in latest version of gcc | |
| 1.6 17 Jan 2010 Avoid signed/unsigned comparison warnings | |
| 1.7 12 Aug 2012 Update for z_const usage in zlib 1.2.8 | |
| */ | |
| /* | |
| gun [ -t ] [ name ... ] | |
| decompresses the data in the named gzip files. If no arguments are given, | |
| gun will decompress from stdin to stdout. The names must end in .gz, -gz, | |
| .z, -z, _z, or .Z. The uncompressed data will be written to a file name | |
| with the suffix stripped. On success, the original file is deleted. On | |
| failure, the output file is deleted. For most failures, the command will | |
| continue to process the remaining names on the command line. A memory | |
| allocation failure will abort the command. If -t is specified, then the | |
| listed files or stdin will be tested as gzip files for integrity (without | |
| checking for a proper suffix), no output will be written, and no files | |
| will be deleted. | |
| Like gzip, gun allows concatenated gzip streams and will decompress them, | |
| writing all of the uncompressed data to the output. Unlike gzip, gun allows | |
| an empty file on input, and will produce no error writing an empty output | |
| file. | |
| gun will also decompress files made by Unix compress, which uses LZW | |
| compression. These files are automatically detected by virtue of their | |
| magic header bytes. Since the end of Unix compress stream is marked by the | |
| end-of-file, they cannot be concatenated. If a Unix compress stream is | |
| encountered in an input file, it is the last stream in that file. | |
| Like gunzip and uncompress, the file attributes of the original compressed | |
| file are maintained in the final uncompressed file, to the extent that the | |
| user permissions allow it. | |
| On my Mac OS X PowerPC G4, gun is almost twice as fast as gunzip (version | |
| 1.2.4) is on the same file, when gun is linked with zlib 1.2.2. Also the | |
| LZW decompression provided by gun is about twice as fast as the standard | |
| Unix uncompress command. | |
| */ | |
| /* external functions and related types and constants */ | |
| /* inflateBackEnd(), crc32() */ | |
| /* function declaration */ | |
| /* buffer constants */ | |
| /* structure for infback() to pass to input function in() -- it maintains the | |
| input file and a buffer of size SIZE */ | |
| struct ind { | |
| int infile; | |
| unsigned char *inbuf; | |
| }; | |
| /* Load input buffer, assumed to be empty, and return bytes loaded and a | |
| pointer to them. read() is called until the buffer is full, or until it | |
| returns end-of-file or error. Return 0 on error. */ | |
| local unsigned in(void *in_desc, z_const unsigned char **buf) | |
| { | |
| int ret; | |
| unsigned len; | |
| unsigned char *next; | |
| struct ind *me = (struct ind *)in_desc; | |
| next = me->inbuf; | |
| *buf = next; | |
| len = 0; | |
| do { | |
| ret = PIECE; | |
| if ((unsigned)ret > SIZE - len) | |
| ret = (int)(SIZE - len); | |
| ret = (int)read(me->infile, next, ret); | |
| if (ret == -1) { | |
| len = 0; | |
| break; | |
| } | |
| next += ret; | |
| len += ret; | |
| } while (ret != 0 && len < SIZE); | |
| return len; | |
| } | |
| /* structure for infback() to pass to output function out() -- it maintains the | |
| output file, a running CRC-32 check on the output and the total number of | |
| bytes output, both for checking against the gzip trailer. (The length in | |
| the gzip trailer is stored modulo 2^32, so it's ok if a long is 32 bits and | |
| the output is greater than 4 GB.) */ | |
| struct outd { | |
| int outfile; | |
| int check; /* true if checking crc and total */ | |
| unsigned long crc; | |
| unsigned long total; | |
| }; | |
| /* Write output buffer and update the CRC-32 and total bytes written. write() | |
| is called until all of the output is written or an error is encountered. | |
| On success out() returns 0. For a write failure, out() returns 1. If the | |
| output file descriptor is -1, then nothing is written. | |
| */ | |
| local int out(void *out_desc, unsigned char *buf, unsigned len) | |
| { | |
| int ret; | |
| struct outd *me = (struct outd *)out_desc; | |
| if (me->check) { | |
| me->crc = crc32(me->crc, buf, len); | |
| me->total += len; | |
| } | |
| if (me->outfile != -1) | |
| do { | |
| ret = PIECE; | |
| if ((unsigned)ret > len) | |
| ret = (int)len; | |
| ret = (int)write(me->outfile, buf, ret); | |
| if (ret == -1) | |
| return 1; | |
| buf += ret; | |
| len -= ret; | |
| } while (len != 0); | |
| return 0; | |
| } | |
| /* next input byte macro for use inside lunpipe() and gunpipe() */ | |
| /* memory for gunpipe() and lunpipe() -- | |
| the first 256 entries of prefix[] and suffix[] are never used, could | |
| have offset the index, but it's faster to waste the memory */ | |
| unsigned char inbuf[SIZE]; /* input buffer */ | |
| unsigned char outbuf[SIZE]; /* output buffer */ | |
| unsigned short prefix[65536]; /* index to LZW prefix string */ | |
| unsigned char suffix[65536]; /* one-character LZW suffix */ | |
| unsigned char match[65280 + 2]; /* buffer for reversed match or gzip | |
| 32K sliding window */ | |
| /* throw out what's left in the current bits byte buffer (this is a vestigial | |
| aspect of the compressed data format derived from an implementation that | |
| made use of a special VAX machine instruction!) */ | |
| /* Decompress a compress (LZW) file from indp to outfile. The compress magic | |
| header (two bytes) has already been read and verified. There are have bytes | |
| of buffered input at next. strm is used for passing error information back | |
| to gunpipe(). | |
| lunpipe() will return Z_OK on success, Z_BUF_ERROR for an unexpected end of | |
| file, read error, or write error (a write error indicated by strm->next_in | |
| not equal to Z_NULL), or Z_DATA_ERROR for invalid input. | |
| */ | |
| local int lunpipe(unsigned have, z_const unsigned char *next, struct ind *indp, | |
| int outfile, z_stream *strm) | |
| { | |
| int last; /* last byte read by NEXT(), or -1 if EOF */ | |
| unsigned chunk; /* bytes left in current chunk */ | |
| int left; /* bits left in rem */ | |
| unsigned rem; /* unused bits from input */ | |
| int bits; /* current bits per code */ | |
| unsigned code; /* code, table traversal index */ | |
| unsigned mask; /* mask for current bits codes */ | |
| int max; /* maximum bits per code for this stream */ | |
| unsigned flags; /* compress flags, then block compress flag */ | |
| unsigned end; /* last valid entry in prefix/suffix tables */ | |
| unsigned temp; /* current code */ | |
| unsigned prev; /* previous code */ | |
| unsigned final; /* last character written for previous code */ | |
| unsigned stack; /* next position for reversed string */ | |
| unsigned outcnt; /* bytes in output buffer */ | |
| struct outd outd; /* output structure */ | |
| unsigned char *p; | |
| /* set up output */ | |
| outd.outfile = outfile; | |
| outd.check = 0; | |
| /* process remainder of compress header -- a flags byte */ | |
| flags = NEXT(); | |
| if (last == -1) | |
| return Z_BUF_ERROR; | |
| if (flags & 0x60) { | |
| strm->msg = (z_const char *)"unknown lzw flags set"; | |
| return Z_DATA_ERROR; | |
| } | |
| max = flags & 0x1f; | |
| if (max < 9 || max > 16) { | |
| strm->msg = (z_const char *)"lzw bits out of range"; | |
| return Z_DATA_ERROR; | |
| } | |
| if (max == 9) /* 9 doesn't really mean 9 */ | |
| max = 10; | |
| flags &= 0x80; /* true if block compress */ | |
| /* clear table */ | |
| bits = 9; | |
| mask = 0x1ff; | |
| end = flags ? 256 : 255; | |
| /* set up: get first 9-bit code, which is the first decompressed byte, but | |
| don't create a table entry until the next code */ | |
| if (NEXT() == -1) /* no compressed data is ok */ | |
| return Z_OK; | |
| final = prev = (unsigned)last; /* low 8 bits of code */ | |
| if (NEXT() == -1) /* missing a bit */ | |
| return Z_BUF_ERROR; | |
| if (last & 1) { /* code must be < 256 */ | |
| strm->msg = (z_const char *)"invalid lzw code"; | |
| return Z_DATA_ERROR; | |
| } | |
| rem = (unsigned)last >> 1; /* remaining 7 bits */ | |
| left = 7; | |
| chunk = bits - 2; /* 7 bytes left in this chunk */ | |
| outbuf[0] = (unsigned char)final; /* write first decompressed byte */ | |
| outcnt = 1; | |
| /* decode codes */ | |
| stack = 0; | |
| for (;;) { | |
| /* if the table will be full after this, increment the code size */ | |
| if (end >= mask && bits < max) { | |
| FLUSHCODE(); | |
| bits++; | |
| mask <<= 1; | |
| mask++; | |
| } | |
| /* get a code of length bits */ | |
| if (chunk == 0) /* decrement chunk modulo bits */ | |
| chunk = bits; | |
| code = rem; /* low bits of code */ | |
| if (NEXT() == -1) { /* EOF is end of compressed data */ | |
| /* write remaining buffered output */ | |
| if (outcnt && out(&outd, outbuf, outcnt)) { | |
| strm->next_in = outbuf; /* signal write error */ | |
| return Z_BUF_ERROR; | |
| } | |
| return Z_OK; | |
| } | |
| code += (unsigned)last << left; /* middle (or high) bits of code */ | |
| left += 8; | |
| chunk--; | |
| if (bits > left) { /* need more bits */ | |
| if (NEXT() == -1) /* can't end in middle of code */ | |
| return Z_BUF_ERROR; | |
| code += (unsigned)last << left; /* high bits of code */ | |
| left += 8; | |
| chunk--; | |
| } | |
| code &= mask; /* mask to current code length */ | |
| left -= bits; /* number of unused bits */ | |
| rem = (unsigned)last >> (8 - left); /* unused bits from last byte */ | |
| /* process clear code (256) */ | |
| if (code == 256 && flags) { | |
| FLUSHCODE(); | |
| bits = 9; /* initialize bits and mask */ | |
| mask = 0x1ff; | |
| end = 255; /* empty table */ | |
| continue; /* get next code */ | |
| } | |
| /* special code to reuse last match */ | |
| temp = code; /* save the current code */ | |
| if (code > end) { | |
| /* Be picky on the allowed code here, and make sure that the code | |
| we drop through (prev) will be a valid index so that random | |
| input does not cause an exception. The code != end + 1 check is | |
| empirically derived, and not checked in the original uncompress | |
| code. If this ever causes a problem, that check could be safely | |
| removed. Leaving this check in greatly improves gun's ability | |
| to detect random or corrupted input after a compress header. | |
| In any case, the prev > end check must be retained. */ | |
| if (code != end + 1 || prev > end) { | |
| strm->msg = (z_const char *)"invalid lzw code"; | |
| return Z_DATA_ERROR; | |
| } | |
| match[stack++] = (unsigned char)final; | |
| code = prev; | |
| } | |
| /* walk through linked list to generate output in reverse order */ | |
| p = match + stack; | |
| while (code >= 256) { | |
| *p++ = suffix[code]; | |
| code = prefix[code]; | |
| } | |
| stack = p - match; | |
| match[stack++] = (unsigned char)code; | |
| final = code; | |
| /* link new table entry */ | |
| if (end < mask) { | |
| end++; | |
| prefix[end] = (unsigned short)prev; | |
| suffix[end] = (unsigned char)final; | |
| } | |
| /* set previous code for next iteration */ | |
| prev = temp; | |
| /* write output in forward order */ | |
| while (stack > SIZE - outcnt) { | |
| while (outcnt < SIZE) | |
| outbuf[outcnt++] = match[--stack]; | |
| if (out(&outd, outbuf, outcnt)) { | |
| strm->next_in = outbuf; /* signal write error */ | |
| return Z_BUF_ERROR; | |
| } | |
| outcnt = 0; | |
| } | |
| p = match + stack; | |
| do { | |
| outbuf[outcnt++] = *--p; | |
| } while (p > match); | |
| stack = 0; | |
| /* loop for next code with final and prev as the last match, rem and | |
| left provide the first 0..7 bits of the next code, end is the last | |
| valid table entry */ | |
| } | |
| } | |
| /* Decompress a gzip file from infile to outfile. strm is assumed to have been | |
| successfully initialized with inflateBackInit(). The input file may consist | |
| of a series of gzip streams, in which case all of them will be decompressed | |
| to the output file. If outfile is -1, then the gzip stream(s) integrity is | |
| checked and nothing is written. | |
| The return value is a zlib error code: Z_MEM_ERROR if out of memory, | |
| Z_DATA_ERROR if the header or the compressed data is invalid, or if the | |
| trailer CRC-32 check or length doesn't match, Z_BUF_ERROR if the input ends | |
| prematurely or a write error occurs, or Z_ERRNO if junk (not a another gzip | |
| stream) follows a valid gzip stream. | |
| */ | |
| local int gunpipe(z_stream *strm, int infile, int outfile) | |
| { | |
| int ret, first, last; | |
| unsigned have, flags, len; | |
| z_const unsigned char *next = NULL; | |
| struct ind ind, *indp; | |
| struct outd outd; | |
| /* setup input buffer */ | |
| ind.infile = infile; | |
| ind.inbuf = inbuf; | |
| indp = &ind; | |
| /* decompress concatenated gzip streams */ | |
| have = 0; /* no input data read in yet */ | |
| first = 1; /* looking for first gzip header */ | |
| strm->next_in = Z_NULL; /* so Z_BUF_ERROR means EOF */ | |
| for (;;) { | |
| /* look for the two magic header bytes for a gzip stream */ | |
| if (NEXT() == -1) { | |
| ret = Z_OK; | |
| break; /* empty gzip stream is ok */ | |
| } | |
| if (last != 31 || (NEXT() != 139 && last != 157)) { | |
| strm->msg = (z_const char *)"incorrect header check"; | |
| ret = first ? Z_DATA_ERROR : Z_ERRNO; | |
| break; /* not a gzip or compress header */ | |
| } | |
| first = 0; /* next non-header is junk */ | |
| /* process a compress (LZW) file -- can't be concatenated after this */ | |
| if (last == 157) { | |
| ret = lunpipe(have, next, indp, outfile, strm); | |
| break; | |
| } | |
| /* process remainder of gzip header */ | |
| ret = Z_BUF_ERROR; | |
| if (NEXT() != 8) { /* only deflate method allowed */ | |
| if (last == -1) break; | |
| strm->msg = (z_const char *)"unknown compression method"; | |
| ret = Z_DATA_ERROR; | |
| break; | |
| } | |
| flags = NEXT(); /* header flags */ | |
| NEXT(); /* discard mod time, xflgs, os */ | |
| NEXT(); | |
| NEXT(); | |
| NEXT(); | |
| NEXT(); | |
| NEXT(); | |
| if (last == -1) break; | |
| if (flags & 0xe0) { | |
| strm->msg = (z_const char *)"unknown header flags set"; | |
| ret = Z_DATA_ERROR; | |
| break; | |
| } | |
| if (flags & 4) { /* extra field */ | |
| len = NEXT(); | |
| len += (unsigned)(NEXT()) << 8; | |
| if (last == -1) break; | |
| while (len > have) { | |
| len -= have; | |
| have = 0; | |
| if (NEXT() == -1) break; | |
| len--; | |
| } | |
| if (last == -1) break; | |
| have -= len; | |
| next += len; | |
| } | |
| if (flags & 8) /* file name */ | |
| while (NEXT() != 0 && last != -1) | |
| ; | |
| if (flags & 16) /* comment */ | |
| while (NEXT() != 0 && last != -1) | |
| ; | |
| if (flags & 2) { /* header crc */ | |
| NEXT(); | |
| NEXT(); | |
| } | |
| if (last == -1) break; | |
| /* set up output */ | |
| outd.outfile = outfile; | |
| outd.check = 1; | |
| outd.crc = crc32(0L, Z_NULL, 0); | |
| outd.total = 0; | |
| /* decompress data to output */ | |
| strm->next_in = next; | |
| strm->avail_in = have; | |
| ret = inflateBack(strm, in, indp, out, &outd); | |
| if (ret != Z_STREAM_END) break; | |
| next = strm->next_in; | |
| have = strm->avail_in; | |
| strm->next_in = Z_NULL; /* so Z_BUF_ERROR means EOF */ | |
| /* check trailer */ | |
| ret = Z_BUF_ERROR; | |
| if (NEXT() != (int)(outd.crc & 0xff) || | |
| NEXT() != (int)((outd.crc >> 8) & 0xff) || | |
| NEXT() != (int)((outd.crc >> 16) & 0xff) || | |
| NEXT() != (int)((outd.crc >> 24) & 0xff)) { | |
| /* crc error */ | |
| if (last != -1) { | |
| strm->msg = (z_const char *)"incorrect data check"; | |
| ret = Z_DATA_ERROR; | |
| } | |
| break; | |
| } | |
| if (NEXT() != (int)(outd.total & 0xff) || | |
| NEXT() != (int)((outd.total >> 8) & 0xff) || | |
| NEXT() != (int)((outd.total >> 16) & 0xff) || | |
| NEXT() != (int)((outd.total >> 24) & 0xff)) { | |
| /* length error */ | |
| if (last != -1) { | |
| strm->msg = (z_const char *)"incorrect length check"; | |
| ret = Z_DATA_ERROR; | |
| } | |
| break; | |
| } | |
| /* go back and look for another gzip stream */ | |
| } | |
| /* clean up and return */ | |
| return ret; | |
| } | |
| /* Copy file attributes, from -> to, as best we can. This is best effort, so | |
| no errors are reported. The mode bits, including suid, sgid, and the sticky | |
| bit are copied (if allowed), the owner's user id and group id are copied | |
| (again if allowed), and the access and modify times are copied. */ | |
| local void copymeta(char *from, char *to) | |
| { | |
| struct stat was; | |
| struct utimbuf when; | |
| /* get all of from's Unix meta data, return if not a regular file */ | |
| if (stat(from, &was) != 0 || (was.st_mode & S_IFMT) != S_IFREG) | |
| return; | |
| /* set to's mode bits, ignore errors */ | |
| (void)chmod(to, was.st_mode & 07777); | |
| /* copy owner's user and group, ignore errors */ | |
| (void)chown(to, was.st_uid, was.st_gid); | |
| /* copy access and modify times, ignore errors */ | |
| when.actime = was.st_atime; | |
| when.modtime = was.st_mtime; | |
| (void)utime(to, &when); | |
| } | |
| /* Decompress the file inname to the file outnname, of if test is true, just | |
| decompress without writing and check the gzip trailer for integrity. If | |
| inname is NULL or an empty string, read from stdin. If outname is NULL or | |
| an empty string, write to stdout. strm is a pre-initialized inflateBack | |
| structure. When appropriate, copy the file attributes from inname to | |
| outname. | |
| gunzip() returns 1 if there is an out-of-memory error or an unexpected | |
| return code from gunpipe(). Otherwise it returns 0. | |
| */ | |
| local int gunzip(z_stream *strm, char *inname, char *outname, int test) | |
| { | |
| int ret; | |
| int infile, outfile; | |
| /* open files */ | |
| if (inname == NULL || *inname == 0) { | |
| inname = "-"; | |
| infile = 0; /* stdin */ | |
| } | |
| else { | |
| infile = open(inname, O_RDONLY, 0); | |
| if (infile == -1) { | |
| fprintf(stderr, "gun cannot open %s\n", inname); | |
| return 0; | |
| } | |
| } | |
| if (test) | |
| outfile = -1; | |
| else if (outname == NULL || *outname == 0) { | |
| outname = "-"; | |
| outfile = 1; /* stdout */ | |
| } | |
| else { | |
| outfile = open(outname, O_CREAT | O_TRUNC | O_WRONLY, 0666); | |
| if (outfile == -1) { | |
| close(infile); | |
| fprintf(stderr, "gun cannot create %s\n", outname); | |
| return 0; | |
| } | |
| } | |
| errno = 0; | |
| /* decompress */ | |
| ret = gunpipe(strm, infile, outfile); | |
| if (outfile > 2) close(outfile); | |
| if (infile > 2) close(infile); | |
| /* interpret result */ | |
| switch (ret) { | |
| case Z_OK: | |
| case Z_ERRNO: | |
| if (infile > 2 && outfile > 2) { | |
| copymeta(inname, outname); /* copy attributes */ | |
| unlink(inname); | |
| } | |
| if (ret == Z_ERRNO) | |
| fprintf(stderr, "gun warning: trailing garbage ignored in %s\n", | |
| inname); | |
| break; | |
| case Z_DATA_ERROR: | |
| if (outfile > 2) unlink(outname); | |
| fprintf(stderr, "gun data error on %s: %s\n", inname, strm->msg); | |
| break; | |
| case Z_MEM_ERROR: | |
| if (outfile > 2) unlink(outname); | |
| fprintf(stderr, "gun out of memory error--aborting\n"); | |
| return 1; | |
| case Z_BUF_ERROR: | |
| if (outfile > 2) unlink(outname); | |
| if (strm->next_in != Z_NULL) { | |
| fprintf(stderr, "gun write error on %s: %s\n", | |
| outname, strerror(errno)); | |
| } | |
| else if (errno) { | |
| fprintf(stderr, "gun read error on %s: %s\n", | |
| inname, strerror(errno)); | |
| } | |
| else { | |
| fprintf(stderr, "gun unexpected end of file on %s\n", | |
| inname); | |
| } | |
| break; | |
| default: | |
| if (outfile > 2) unlink(outname); | |
| fprintf(stderr, "gun internal error--aborting\n"); | |
| return 1; | |
| } | |
| return 0; | |
| } | |
| /* Process the gun command line arguments. See the command syntax near the | |
| beginning of this source file. */ | |
| int main(int argc, char **argv) | |
| { | |
| int ret, len, test; | |
| char *outname; | |
| unsigned char *window; | |
| z_stream strm; | |
| /* initialize inflateBack state for repeated use */ | |
| window = match; /* reuse LZW match buffer */ | |
| strm.zalloc = Z_NULL; | |
| strm.zfree = Z_NULL; | |
| strm.opaque = Z_NULL; | |
| ret = inflateBackInit(&strm, 15, window); | |
| if (ret != Z_OK) { | |
| fprintf(stderr, "gun out of memory error--aborting\n"); | |
| return 1; | |
| } | |
| /* decompress each file to the same name with the suffix removed */ | |
| argc--; | |
| argv++; | |
| test = 0; | |
| if (argc && strcmp(*argv, "-h") == 0) { | |
| fprintf(stderr, "gun 1.6 (17 Jan 2010)\n"); | |
| fprintf(stderr, "Copyright (C) 2003-2010 Mark Adler\n"); | |
| fprintf(stderr, "usage: gun [-t] [file1.gz [file2.Z ...]]\n"); | |
| return 0; | |
| } | |
| if (argc && strcmp(*argv, "-t") == 0) { | |
| test = 1; | |
| argc--; | |
| argv++; | |
| } | |
| if (argc) | |
| do { | |
| if (test) | |
| outname = NULL; | |
| else { | |
| len = (int)strlen(*argv); | |
| if (strcmp(*argv + len - 3, ".gz") == 0 || | |
| strcmp(*argv + len - 3, "-gz") == 0) | |
| len -= 3; | |
| else if (strcmp(*argv + len - 2, ".z") == 0 || | |
| strcmp(*argv + len - 2, "-z") == 0 || | |
| strcmp(*argv + len - 2, "_z") == 0 || | |
| strcmp(*argv + len - 2, ".Z") == 0) | |
| len -= 2; | |
| else { | |
| fprintf(stderr, "gun error: no gz type on %s--skipping\n", | |
| *argv); | |
| continue; | |
| } | |
| outname = malloc(len + 1); | |
| if (outname == NULL) { | |
| fprintf(stderr, "gun out of memory error--aborting\n"); | |
| ret = 1; | |
| break; | |
| } | |
| memcpy(outname, *argv, len); | |
| outname[len] = 0; | |
| } | |
| ret = gunzip(&strm, *argv, outname, test); | |
| if (outname != NULL) free(outname); | |
| if (ret) break; | |
| } while (argv++, --argc); | |
| else | |
| ret = gunzip(&strm, NULL, NULL, test); | |
| /* clean up */ | |
| inflateBackEnd(&strm); | |
| return ret; | |
| } | |