Correcting tag name to be like previous ones1_3_0

1 files changed, 162 insertions, 0 deletions

diff --git a/archival/gunzip.c b/archival/gunzip.c
new file mode 100644
index 0000000..e24401c
--- /dev/null
+++ b/archival/gunzip.c
@@ -0,0 +1,162 @@
+/* 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 <sr1@inf.tu-dresden.de>
+ * based on gzip sources
+ *
+ * Adjusted further by Erik Andersen <andersen@codepoet.org> 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 <bug1@iinet.net.au>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ *
+ * 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 "busybox.h"
+#include "unarchive.h"
+
+#define GUNZIP_OPT_STDOUT	1
+#define GUNZIP_OPT_FORCE	2
+#define GUNZIP_OPT_TEST		4
+#define GUNZIP_OPT_DECOMPRESS	8
+#define GUNZIP_OPT_VERBOSE	0x10
+
+int gunzip_main(int argc, char **argv)
+{
+	USE_DESKTOP(long long) int status;
+	int exitcode = 0;
+	unsigned opt;
+
+	opt = getopt32(argc, argv, "cftdv");
+	/* if called as zcat */
+	if (strcmp(applet_name, "zcat") == 0) {
+		opt |= GUNZIP_OPT_STDOUT;
+	}
+
+	do {
+		struct stat stat_buf;
+		char *old_path = argv[optind];
+		char *delete_path = NULL;
+		char *new_path = NULL;
+		int src_fd;
+		int dst_fd;
+
+		optind++;
+
+		if (old_path == NULL || strcmp(old_path, "-") == 0) {
+			src_fd = STDIN_FILENO;
+			opt |= GUNZIP_OPT_STDOUT;
+			USE_DESKTOP(opt &= ~GUNZIP_OPT_VERBOSE;)
+			optind = argc; /* we don't handle "gunzip - a.gz b.gz" */
+		} else {
+			src_fd = xopen(old_path, O_RDONLY);
+			/* Get the time stamp on the input file. */
+			fstat(src_fd, &stat_buf);
+		}
+
+		/* Check that the input is sane.  */
+		if (isatty(src_fd) && !(opt & GUNZIP_OPT_FORCE)) {
+			bb_error_msg_and_die
+				("compressed data not read from terminal, use -f to force it");
+		}
+
+		/* Set output filename and number */
+		if (opt & GUNZIP_OPT_TEST) {
+			dst_fd = xopen(bb_dev_null, O_WRONLY);	/* why does test use filenum 2 ? */
+		} else if (opt & GUNZIP_OPT_STDOUT) {
+			dst_fd = STDOUT_FILENO;
+		} else {
+			char *extension;
+
+			new_path = xstrdup(old_path);
+
+			extension = strrchr(new_path, '.');
+#ifdef CONFIG_FEATURE_GUNZIP_UNCOMPRESS
+			if (extension && (strcmp(extension, ".Z") == 0)) {
+				*extension = '\0';
+			} else
+#endif
+			if (extension && (strcmp(extension, ".gz") == 0)) {
+				*extension = '\0';
+			} else if (extension && (strcmp(extension, ".tgz") == 0)) {
+				extension[2] = 'a';
+				extension[3] = 'r';
+			} else {
+				// FIXME: should we die or just skip to next?
+				bb_error_msg_and_die("invalid extension");
+			}
+
+			/* Open output file (with correct permissions) */
+			dst_fd = xopen3(new_path, O_WRONLY | O_CREAT | O_TRUNC,
+					stat_buf.st_mode);
+
+			/* If unzip succeeds remove the old file */
+			delete_path = old_path;
+		}
+
+		status = -1;
+		/* do the decompression, and cleanup */
+		if (xread_char(src_fd) == 0x1f) {
+			unsigned char magic2;
+
+			magic2 = xread_char(src_fd);
+			if (ENABLE_FEATURE_GUNZIP_UNCOMPRESS && magic2 == 0x9d) {
+				status = uncompress(src_fd, dst_fd);
+			} else if (magic2 == 0x8b) {
+				check_header_gzip(src_fd); // FIXME: xfunc? _or_die?
+				status = inflate_gunzip(src_fd, dst_fd);
+			} else {
+				bb_error_msg("invalid magic");
+				exitcode = 1;
+			}
+			if (status < 0) {
+				bb_error_msg("error inflating");
+				exitcode = 1;
+			}
+			else if (ENABLE_DESKTOP && (opt & GUNZIP_OPT_VERBOSE)) {
+				fprintf(stderr, "%s: %u%% - replaced with %s\n",
+					old_path, (unsigned)(stat_buf.st_size*100 / (status+1)), new_path);
+			}
+		} else {
+			bb_error_msg("invalid magic");
+			exitcode = 1;
+		}
+		if (status < 0 && new_path) {
+			/* Unzip failed, remove new path instead of old path */
+			delete_path = new_path;
+		}
+
+		if (dst_fd != STDOUT_FILENO) {
+			close(dst_fd);
+		}
+		if (src_fd != STDIN_FILENO) {
+			close(src_fd);
+		}
+
+		/* delete_path will be NULL if in test mode or from stdin */
+		if (delete_path && (unlink(delete_path) == -1)) {
+			bb_error_msg("cannot remove %s", delete_path);
+			exitcode = 1;
+		}
+
+		free(new_path);
+
+	} while (optind < argc);
+
+	return exitcode;
+}