libalpm/handle.c: make realpath() call portable

BSD didn't support the NULL second argument GNU extension, so do it the
old fashioned way.

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/lib/libalpm/handle.c b/lib/libalpm/handle.c
index 5cbb0157..4c18943a 100644
--- a/lib/libalpm/handle.c
+++ b/lib/libalpm/handle.c
@@ -285,10 +285,9 @@ int SYMEXPORT alpm_option_set_root(const char *root)
 		pm_errno = PM_ERR_NOT_A_DIR;
 		return(-1);
 	}
-	/* According to the man page, realpath is safe to use IFF the second arg is
-	 * NULL. */
-	realroot = realpath(root, NULL);
-	if(!realroot) {
+
+	realroot = calloc(PATH_MAX+1, sizeof(char));
+	if(!realpath(root, realroot)) {
 		pm_errno = PM_ERR_NOT_A_DIR;
 		return(-1);
 	}