make endmntent function handle null argument

The function originates from SunOS 4.x in which the null argument
is allowed. glibc also handles this case.

diff --git a/src/misc/mntent.c b/src/misc/mntent.c
index 3eafba5e0b387ce98e0aefde2bbdaf8288757af9..a16d65254d5042df3de28ff29dc719ccecc76bc5 100644 (file)
--- a/src/misc/mntent.c
+++ b/src/misc/mntent.c
@@ -10,7 +10,7 @@ FILE *setmntent(const char *name, const char *mode)
 
 int endmntent(FILE *f)
 {
-       fclose(f);
+       if (f) fclose(f);
        return 1;
 }