From 44019f6542885fd684c5113c7a5c06308a51102a Mon Sep 17 00:00:00 2001
From: Christian Ruppert <idl0r@gentoo.org>
Date: Thu, 26 Jan 2012 20:44:33 +0100
Subject: [PATCH] Add is_writable() function to check whether a path is
 writable or not

---
 src/includes/rc-misc.h | 7 +++++++
 src/rc/rc-misc.c       | 9 +++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/includes/rc-misc.h b/src/includes/rc-misc.h
index 773c4b99..18ed5b9f 100644
--- a/src/includes/rc-misc.h
+++ b/src/includes/rc-misc.h
@@ -36,6 +36,7 @@
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #define RC_LEVEL_BOOT           "boot"
 #define RC_LEVEL_DEFAULT        "default"
@@ -166,6 +167,12 @@ int svc_lock(const char *);
 int svc_unlock(const char *, int);
 pid_t exec_service(const char *, const char *);
 
+/*
+ * Check whether path is writable or not,
+ * this also works properly with read-only filesystems
+ */
+int is_writable(const char *);
+
 #define service_start(service) exec_service(service, "start");
 #define service_stop(service)  exec_service(service, "stop");
 
diff --git a/src/rc/rc-misc.c b/src/rc/rc-misc.c
index a06ff088..27397d71 100644
--- a/src/rc/rc-misc.c
+++ b/src/rc/rc-misc.c
@@ -331,3 +331,12 @@ parse_mode(mode_t *mode, char *text)
 	errno = EINVAL;
 	return -1;
 }
+
+int
+is_writable(const char *path)
+{
+	if (access(path, W_OK) == 0)
+		return 1;
+
+	return 0;
+}