From 008d0be72b2f160382c6e880765e96b64a050c65 Mon Sep 17 00:00:00 2001 From: Andreas Baumann Date: Sat, 3 Jan 2015 12:04:58 +0100 Subject: imported original firmware WRT54GL_v4.30.11_11_US --- release/src/router/busybox/gunzip.c | 164 ++++++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 release/src/router/busybox/gunzip.c (limited to 'release/src/router/busybox/gunzip.c') diff --git a/release/src/router/busybox/gunzip.c b/release/src/router/busybox/gunzip.c new file mode 100644 index 00000000..ab9ba8b9 --- /dev/null +++ b/release/src/router/busybox/gunzip.c @@ -0,0 +1,164 @@ +/* vi: set sw=4 ts=4: */ +/* + * Gzip implementation for busybox + * + * Based on GNU gzip v1.2.4 Copyright (C) 1992-1993 Jean-loup Gailly. + * + * Originally adjusted for busybox by Sven Rudolph + * based on gzip sources + * + * Adjusted further by Erik Andersen , + * to support files as well as stdin/stdout, and to generally behave itself wrt + * command line handling. + * + * General cleanup to better adhere to the style guide and make use of standard + * busybox functions by Glenn McGrath + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * + * gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface + * Copyright (C) 1992-1993 Jean-loup Gailly + * The unzip code was written and put in the public domain by Mark Adler. + * Portions of the lzw code are derived from the public domain 'compress' + * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies, + * Ken Turkowski, Dave Mack and Peter Jannesen. + * + * See the license_msg below and the file COPYING for the software license. + * See the file algorithm.doc for the compression algorithms and file formats. + */ + + +#include +#include +#include +#include +#include "busybox.h" + +extern int gunzip_main(int argc, char **argv) +{ + FILE *in_file = stdin; + FILE *out_file = NULL; + struct stat stat_buf; + + char *if_name = NULL; + char *of_name = NULL; + char *delete_file_name = NULL; + + const int gunzip_to_stdout = 1; + const int gunzip_force = 2; + const int gunzip_test = 4; + + int flags = 0; + int opt = 0; + int delete_old_file = FALSE; + + /* if called as zcat */ + if (strcmp(applet_name, "zcat") == 0) + flags |= gunzip_to_stdout; + + while ((opt = getopt(argc, argv, "ctfhdq")) != -1) { + switch (opt) { + case 'c': + flags |= gunzip_to_stdout; + break; + case 'f': + flags |= gunzip_force; + break; + case 't': + flags |= gunzip_test; + break; + case 'd': /* Used to convert gzip to gunzip. */ + break; + case 'q': + error_msg("-q option not supported, ignored"); + break; + case 'h': + default: + show_usage(); /* exit's inside usage */ + } + } + + /* Set input filename and number */ + if (argv[optind] == NULL || strcmp(argv[optind], "-") == 0) { + flags |= gunzip_to_stdout; + } else { + if_name = strdup(argv[optind]); + /* Open input file */ + in_file = xfopen(if_name, "r"); + + /* set the buffer size */ + setvbuf(in_file, NULL, _IOFBF, 0x8000); + + /* Get the time stamp on the input file. */ + if (stat(if_name, &stat_buf) < 0) { + error_msg_and_die("Couldn't stat file %s", if_name); + } + } + + /* Check that the input is sane. */ + if (isatty(fileno(in_file)) && (flags & gunzip_force) == 0) + error_msg_and_die("compressed data not read from terminal. Use -f to force it."); + + /* Set output filename and number */ + if (flags & gunzip_test) { + out_file = xfopen("/dev/null", "w"); /* why does test use filenum 2 ? */ + } else if (flags & gunzip_to_stdout) { + out_file = stdout; + } else { + char *extension; + int length = strlen(if_name); + + delete_old_file = TRUE; + extension = strrchr(if_name, '.'); + if (extension && strcmp(extension, ".gz") == 0) { + length -= 3; + } else if (extension && strcmp(extension, ".tgz") == 0) { + length -= 4; + } else { + error_msg_and_die("Invalid extension"); + } + of_name = (char *) xcalloc(sizeof(char), length + 1); + strncpy(of_name, if_name, length); + + /* Open output file */ + out_file = xfopen(of_name, "w"); + + /* Set permissions on the file */ + chmod(of_name, stat_buf.st_mode); + } + + /* do the decompression, and cleanup */ + if (unzip(in_file, out_file) == 0) { + /* Success, remove .gz file */ + delete_file_name = if_name; + } else { + /* remove failed attempt */ + delete_file_name = of_name; + } + + fclose(out_file); + fclose(in_file); + + if (delete_old_file == TRUE) { + if (unlink(delete_file_name) < 0) { + error_msg_and_die("Couldnt remove %s", delete_file_name); + } + } + + free(of_name); + + return(EXIT_SUCCESS); +} -- cgit v1.2.3-54-g00ecf