From: Serge Hallyn <serge.hallyn@ubuntu.com>
Date: Tue, 16 Apr 2013 12:35:05 +0000 (-0500)
Subject: mkdir_p: account for '//foo/bar'
X-Git-Tag: lxc-1.0.0.alpha1~1^2~292
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=883f4a1eae77f332059dc0be6f965485a0361ec0;p=thirdparty%2Flxc.git

mkdir_p: account for '//foo/bar'

As Richard reported, dirname('//') returns //.  But mkdir_p only stops
when called with '/', resulting in infinite recursion when given a
pathname '//foo/bar'.

Reported-by: richard -rw- weinberger <richard.weinberger@gmail.com>
Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
---

diff --git a/src/lxc/utils.c b/src/lxc/utils.c
index ecf9d2c77..b17f51de9 100644
--- a/src/lxc/utils.c
+++ b/src/lxc/utils.c
@@ -95,12 +95,21 @@ extern int get_u16(unsigned short *val, const char *arg, int base)
 	return 0;
 }
 
+static int is_all_slashes(char *path)
+{
+	while (*path && *path == '/')
+		path++;
+	if (*path)
+		return 0;
+	return 1;
+}
+
 extern int mkdir_p(char *dir, mode_t mode)
 {
         int ret;
         char *d;
 
-        if (!strcmp(dir, "/"))
+	if (is_all_slashes(dir))
                 return 0;
 
         d = strdup(dir);