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-rw-r--r--archival/unlzma.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/archival/unlzma.c b/archival/unlzma.c
new file mode 100644
index 0000000..dc85cb2
--- /dev/null
+++ b/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: */