From: Alan T. DeKok <aland@freeradius.org>
Date: Fri, 2 Jan 2026 00:37:05 +0000 (-0500)
Subject: add fr_cloexec()
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb6dcb10dfbf0c9ec05034278c1bf0353bc9d027;p=thirdparty%2Ffreeradius-server.git

add fr_cloexec()
---

diff --git a/src/lib/util/misc.c b/src/lib/util/misc.c
index bf4c82aa588..395118f5204 100644
--- a/src/lib/util/misc.c
+++ b/src/lib/util/misc.c
@@ -303,6 +303,38 @@ int fr_blocking(UNUSED int fd)
 }
 #endif
 
+#ifdef FD_CLOEXEC
+/** Set FD_CLOEXEC on a socket
+ * @param fd to set FD_CLOEXEC flag on.
+ * @return
+ *	- Flags set on the fd.
+ *	- -1 on failure.
+ */
+int fr_cloexec(int fd)
+{
+	int flags;
+
+	flags = fcntl(fd, F_GETFL, NULL);
+	if (flags < 0)  {
+		fr_strerror_printf("Failed getting fd flags: %s", fr_syserror(errno));
+		return -1;
+	}
+
+	flags |= FD_CLOEXEC;
+	if (fcntl(fd, F_SETFL, flags) < 0) {
+		fr_strerror_printf("Failed setting fd flags: %s", fr_syserror(errno));
+		return -1;
+	}
+
+	return flags;
+}
+#else
+int fr_nonblock(UNUSED int fd)
+{
+	return 0;
+}
+#endif
+
 /** Convert UTF8 string to UCS2 encoding
  *
  * @note Borrowed from src/crypto/ms_funcs.c of wpa_supplicant project (http://hostap.epitest.fi/wpa_supplicant/)
diff --git a/src/lib/util/misc.h b/src/lib/util/misc.h
index 7d659ea3fe2..ca61a10c18a 100644
--- a/src/lib/util/misc.h
+++ b/src/lib/util/misc.h
@@ -145,6 +145,7 @@ char		*fr_tolower(char *str);
 
 int		fr_nonblock(int fd);
 int		fr_blocking(int fd);
+int		fr_cloexec(int fd);
 
 ssize_t		fr_utf8_to_ucs2(uint8_t *out, size_t outlen, char const *in, size_t inlen);
 size_t		fr_snprint_uint128(char *out, size_t outlen, uint128_t const num);