[Toybox] [PATCH 3/5] Add new toy - chmod.

[Georgi Chorbadzhiyski]

---
 toys/chmod.c |   58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 58 insertions(+), 0 deletions(-)
 create mode 100644 toys/chmod.c

diff --git a/toys/chmod.c b/toys/chmod.c
new file mode 100644
index 0000000..d681d50
--- /dev/null
+++ b/toys/chmod.c
@@ -0,0 +1,58 @@
+/* vi: set sw=4 ts=4:
+ *
+ * chmod.c - Change file mode bits
+ *
+ * Copyright 2012 Georgi Chorbadzhiyski <georgi at unixsol.org>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/009695399/utilities/chmod.html
+ *
+
+USE_CHMOD(NEWTOY(chmod, "<2Rfv", TOYFLAG_BIN))
+
+config CHMOD
+	bool "chmod"
+	default y
+	help
+	  usage: chmod [-R] [-f] [-v] mode file...
+	  Change mode bits of one or more files.
+
+	  -R	recurse into subdirectories.
+	  -f	suppress most error messages.
+	  -v	verbose output.
+*/
+
+#include "toys.h"
+
+#define FLAG_R 4
+#define FLAG_f 2
+#define FLAG_v 1
+
+DEFINE_GLOBALS(
+	long mode;
+)
+
+#define TT this.chmod
+
+static int do_chmod(char *path) {
+	int ret = chmod(path, TT.mode);
+	if (toys.optflags & FLAG_v)
+		xprintf("chmod(%04o, %s)\n", TT.mode, path);
+	if (ret == -1 && !(toys.optflags & FLAG_f))
+		perror_msg("changing perms of '%s' to %04o", path, TT.mode);
+	toys.exitval |= ret;
+	return ret;
+}
+
+void chmod_main(void)
+{
+	char **s;
+	TT.mode = strtoul(*toys.optargs, NULL, 8);
+
+	for (s=toys.optargs + 1; *s; s++) {
+		if (toys.optflags & FLAG_R) {
+			dirtree_for_each(*s, do_chmod);
+		} else {
+			do_chmod(*s);
+		}
+	}
+}
-- 
1.7.5.1