From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 16 Nov 2020 11:41:39 +0000 (+0100)
Subject: socket-util: add getsockopt_int() helper
X-Git-Tag: v248-rc1~562^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4e25d4cf0f78ef7c960f2b77c941e3d8751535df;p=thirdparty%2Fsystemd.git

socket-util: add getsockopt_int() helper
---

diff --git a/src/basic/socket-util.h b/src/basic/socket-util.h
index 7d77144f436..0dd6798d32e 100644
--- a/src/basic/socket-util.h
+++ b/src/basic/socket-util.h
@@ -258,6 +258,19 @@ static inline int setsockopt_int(int fd, int level, int optname, int value) {
         return 0;
 }
 
+static inline int getsockopt_int(int fd, int level, int optname, int *ret) {
+        int v;
+        socklen_t sl = sizeof(v);
+
+        if (getsockopt(fd, level, optname, &v, &sl) < 0)
+                return -errno;
+        if (sl != sizeof(v))
+                return -EIO;
+
+        *ret = v;
+        return 0;
+}
+
 int socket_bind_to_ifname(int fd, const char *ifname);
 int socket_bind_to_ifindex(int fd, int ifindex);