cpio applet, and changes to associated code

1 files changed, 93 insertions, 0 deletions

diff --git a/cpio.c b/cpio.c
new file mode 100644
index 0000000..ecd6f53
--- /dev/null
+++ b/cpio.c
@@ -0,0 +1,93 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini cpio implementation for busybox
+ *
+ * Copyright (C) 2001 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
+ *
+ * Limitations:
+ *		Doesn't check CRC's
+ *		Only supports new ASCII and CRC formats
+ *		Doesnt support hard links
+ *
+ */
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "busybox.h"
+
+extern int cpio_main(int argc, char **argv)
+{
+	FILE *src_stream = stdin;
+	char **extract_names = NULL;
+	int extract_function = 0;
+	int num_of_entries = 0;
+	int opt = 0;
+	mode_t oldmask = 0;
+
+	while ((opt = getopt(argc, argv, "idmuvtF:")) != -1) {
+		switch (opt) {
+		case 'i': // extract
+			extract_function |= extract_all_to_fs;
+			break;
+		case 'd': // create directories
+			extract_function |= extract_create_dirs;
+			oldmask = umask(077); /* Make create_path act like GNU cpio */
+			break;
+		case 'm': // preserve modification time
+			extract_function |= extract_preserve_date;
+			break;
+		case 'v': // verbosly list files
+			extract_function |= extract_verbose_list;
+			break;
+		case 'u': // unconditional
+			extract_function |= extract_unconditional;
+			break;
+		case 't': // list files
+			extract_function |= extract_list;
+			break;
+		case 'F':
+			src_stream = xfopen(optarg, "r");
+			break;
+		default:
+			show_usage();
+		}
+	}
+
+	if (extract_function & extract_all_to_fs && extract_function & extract_list) {
+		extract_function ^= extract_all_to_fs; /* If specify t, don't extract*/
+	}
+
+	if (extract_function & extract_all_to_fs && extract_function & extract_verbose_list) { /* The meaning of v changes on extract */
+		extract_function ^= extract_verbose_list;
+		extract_function |= extract_list;
+	}
+
+	extract_names = malloc(4);
+	while (optind < argc) {
+		num_of_entries++;
+		*extract_names = realloc(*extract_names, num_of_entries);
+		extract_names[num_of_entries - 1] = xstrdup(argv[optind]);
+		optind++;
+	}
+
+	unarchive(src_stream, &get_header_cpio, extract_function, "./", extract_names);
+	if (oldmask) umask(oldmask); /* Restore umask if we changed it */
+	return EXIT_SUCCESS;
+}
+