Patch from Aurelien Jacobs to add unlzma. (A new decompression type,

see www.7-zip.org)

archival/unlzma.c

@@ -0,0 +1,65 @@
+/*
+ * Small lzma deflate implementation.
+ * Copyright (C) 2006  Aurelien Jacobs <aurel@gnuage.org>
+ *
+ * Based on bunzip.c from busybox
+ *
+ * Licensed under GPL v2, see file LICENSE in this tarball for details.
+ */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "busybox.h"
+#include "unarchive.h"
+
+#define UNLZMA_OPT_STDOUT	1
+
+int unlzma_main(int argc, char **argv)
+{
+	char *filename;
+	unsigned long opt;
+	int status, src_fd, dst_fd;
+
+	opt = bb_getopt_ulflags(argc, argv, "c");
+
+	/* Set input filename and number */
+	filename = argv[optind];
+	if ((filename) && (filename[0] != '-') && (filename[1] != '\0')) {
+		/* Open input file */
+		src_fd = bb_xopen(filename, O_RDONLY);
+	} else {
+		src_fd = STDIN_FILENO;
+		filename = 0;
+	}
+
+	/* if called as lzmacat force the stdout flag */
+	if ((opt & UNLZMA_OPT_STDOUT) || bb_applet_name[4] == 'c')
+		filename = 0;
+
+	if (filename) {
+		char *extension = filename + strlen(filename) - 5;
+
+		if (strcmp(extension, ".lzma") != 0) {
+			bb_error_msg_and_die("Invalid extension");
+		}
+		*extension = 0;
+		dst_fd = bb_xopen(filename, O_WRONLY | O_CREAT);
+	} else
+		dst_fd = STDOUT_FILENO;
+	status = unlzma(src_fd, dst_fd);
+	if (filename) {
+		if (!status)
+			filename[strlen(filename)] = '.';
+		if (unlink(filename) < 0) {
+			bb_error_msg_and_die("Couldn't remove %s", filename);
+		}
+	}
+
+	return status;
+}
+
+/* vi:set ts=4: */