Use more efficient way of restoring working directory

Rather than using a string-based path, we can restore the working
directory via a file descriptor and use of fchdir().

From the getcwd manpage:
    Opening the current directory (".") and calling fchdir(2) to
    return is usually a faster and more reliable alternative when
    sufficiently many file descriptors are available.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/libalpm/handle.c b/lib/libalpm/handle.c
index 5fb4f2bb..dcd81cea 100644
--- a/lib/libalpm/handle.c
+++ b/lib/libalpm/handle.c
@@ -115,7 +115,7 @@ int _alpm_handle_lock(alpm_handle_t *handle)
 	do {
 		fd = open(handle->lockfile, O_WRONLY | O_CREAT | O_EXCL, 0000);
 	} while(fd == -1 && errno == EINTR);
-	if(fd > 0) {
+	if(fd >= 0) {
 		FILE *f = fdopen(fd, "w");
 		fprintf(f, "%ld\n", (long)getpid());
 		fflush(f);