X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Futils.c;h=d0d106279268a3efb183fd2eeee386b2bf0b554f;hb=7208397398f7e08d741bfa83594a88e5d01b6220;hp=f14094f6f2460a38a461d99b7bd0af1cce833a23;hpb=4214794ce68b9456146a5bf35db9e58da836b728;p=tinc

diff --git a/src/utils.c b/src/utils.c
index f14094f6..d0d10627 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -284,3 +284,30 @@ char *replace_name(const char *name) {
 
 	return ret_name;
 }
+
+/* Open a file with the desired permissions, minus the umask.
+   Also, if we want to create an executable file, we call fchmod()
+   to set the executable bits. */
+
+FILE *fopenmask(const char *filename, const char *mode, mode_t perms) {
+	mode_t mask = umask(0);
+	perms &= ~mask;
+	umask(~perms & 0777);
+	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);
+	}
+
+#endif
+	umask(mask);
+	return f;
+}
+