1 files changed, 64 insertions, 0 deletions
diff --git a/archival/unlzma.c b/archival/unlzma.c
new file mode 100644
index 000000000..46fbefdc0
--- /dev/null
+++ b/archival/unlzma.c
@@ -0,0 +1,64 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * 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.
+ */
+
+/* Why our g[un]zip/bunzip2 are so ugly compared to this beauty? */
+
+#include "busybox.h"
+#include "unarchive.h"
+
+#define UNLZMA_OPT_STDOUT	1
+
+int unlzma_main(int argc, char **argv)
+{
+	USE_DESKTOP(long long) int status;
+	char *filename;
+	unsigned opt;
+	int src_fd, dst_fd;
+
+	opt = getopt32(argc, argv, "c");
+
+	/* Set input filename and number */
+	filename = argv[optind];
+	if (filename && (filename[0] != '-') && (filename[1] != '\0')) {
+		/* Open input file */
+		src_fd = xopen(filename, O_RDONLY);
+	} else {
+		src_fd = STDIN_FILENO;
+		filename = 0;
+	}
+
+	/* if called as lzmacat force the stdout flag */
+	if ((opt & UNLZMA_OPT_STDOUT) || applet_name[4] == 'c')
+		filename = 0;
+
+	if (filename) {
+		struct stat stat_buf;
+		/* bug: char *extension = filename + strlen(filename) - 5; */
+		char *extension = strrchr(filename, '.');
+		if (!extension || strcmp(extension, ".lzma") != 0) {
+			bb_error_msg_and_die("invalid extension");
+		}
+		xstat(filename, &stat_buf);
+		*extension = '\0';
+		dst_fd = xopen3(filename, O_WRONLY | O_CREAT | O_TRUNC,
+				stat_buf.st_mode);
+	} else
+		dst_fd = STDOUT_FILENO;
+	status = unlzma(src_fd, dst_fd);
+	if (filename) {
+		if (status >= 0) /* if success delete src, else delete dst */
+			filename[strlen(filename)] = '.';
+		if (unlink(filename) < 0) {
+			bb_error_msg_and_die("cannot remove %s", filename);
+		}
+	}
+
+	return (status < 0);
+}