Fix warnings about missing return value checks.

[tinc] / src / tincctl.c

diff --git a/src/tincctl.c b/src/tincctl.c
index c9d8c67..00757c4 100644 (file)
--- a/src/tincctl.c
+++ b/src/tincctl.c
@@ -233,6 +233,12 @@ FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
        perms &= ~mask;
        umask(~perms);
        FILE *f = fopen(filename, mode);
+
+       if(!f) {
+               fprintf(stderr, "Could not open %s: %s\n", filename, strerror(errno));
+               return NULL;
+       }
+
 #ifdef HAVE_FCHMOD
        if((perms & 0444) && f)
                fchmod(fileno(f), perms);