From: Timo Sirainen <tss@iki.fi>
Date: Sat, 23 Jan 2010 10:37:14 +0000 (+0200)
Subject: Added t_readlink().
X-Git-Tag: 2.0.beta2~48
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e282ab2a97731af46a4c7f8f3cef45d39fb19997;p=thirdparty%2Fdovecot%2Fcore.git

Added t_readlink().

--HG--
branch : HEAD
---

diff --git a/src/lib/abspath.c b/src/lib/abspath.c
index 80903188e9..aeaa9a4a44 100644
--- a/src/lib/abspath.c
+++ b/src/lib/abspath.c
@@ -42,3 +42,24 @@ int t_get_current_dir(const char **dir_r)
 	*dir_r = dir;
 	return 0;
 }
+
+int t_readlink(const char *path, const char **dest_r)
+{
+	/* @UNSAFE */
+	ssize_t ret;
+	char *dest;
+	size_t size = 128;
+
+	dest = t_buffer_get(size);
+	while ((ret = readlink(path, dest, size)) >= (ssize_t)size) {
+		size = nearest_power(size+1);
+		dest = t_buffer_get(size);
+	}
+	if (ret < 0)
+		return -1;
+
+	dest[ret] = '\0';
+	t_buffer_alloc(ret + 1);
+	*dest_r = dest;
+	return 0;
+}
diff --git a/src/lib/abspath.h b/src/lib/abspath.h
index cbdc9dede2..27956fb775 100644
--- a/src/lib/abspath.h
+++ b/src/lib/abspath.h
@@ -9,5 +9,7 @@ const char *t_abspath_to(const char *path, const char *root);
 
 /* Returns current directory, allocated from data stack. */
 int t_get_current_dir(const char **dir_r);
+/* Returns symlink destination, allocated from data stack. */
+int t_readlink(const char *path, const char **dest_r);
 
 #endif