From: Michael Tremer <michael.tremer@ipfire.org>
Date: Wed, 31 Aug 2022 15:44:12 +0000 (+0000)
Subject: util: Add function to convert paths into absolute
X-Git-Tag: 0.9.28~350
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e538e0c7ed067f448bc5d9863ca427d272679a8b;p=pakfire.git

util: Add function to convert paths into absolute

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/libpakfire/include/pakfire/util.h b/src/libpakfire/include/pakfire/util.h
index 97d514ed2..944cd5e6a 100644
--- a/src/libpakfire/include/pakfire/util.h
+++ b/src/libpakfire/include/pakfire/util.h
@@ -55,6 +55,7 @@ int __pakfire_unhexlify(unsigned char* dst, const size_t l, const char* src);
 	__pakfire_path_join(dest, sizeof(dest), first, second)
 int __pakfire_path_join(char* dest, const size_t length,
 	const char* first, const char* second);
+const char* pakfire_path_abspath(const char* path);
 const char* pakfire_path_relpath(const char* root, const char* path);
 
 // File stuff
diff --git a/src/libpakfire/util.c b/src/libpakfire/util.c
index 640e02725..a01913dbd 100644
--- a/src/libpakfire/util.c
+++ b/src/libpakfire/util.c
@@ -86,6 +86,29 @@ int __pakfire_path_join(char* dest, const size_t length,
 	return __pakfire_string_format(dest, length, "%s/%s", first, second);
 }
 
+const char* pakfire_path_abspath(const char* path) {
+	static char buffer[PATH_MAX];
+	int r;
+
+	// Check input
+	if (!path) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	// Return path if already absolute
+	if (*path == '/')
+		return path;
+
+	// Otherwise prepend a /
+	r = pakfire_string_format(buffer, "/%s", path);
+	if (r)
+		return NULL;
+
+	// Return a reference to the buffer
+	return buffer;
+}
+
 const char* pakfire_path_relpath(const char* root, const char* path) {
 	if (pakfire_string_startswith(path, root))
 		return path + strlen(root);