utils: use setres{u,g}id() in lxc_switch_uid_gid()

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

utils: use setres{u,g}id() in lxc_switch_uid_gid()
05bec191 · Christian Brauner · Stéphane Graber · 9ae55948 · 05bec191
Unverified Commit 05bec191 authored Apr 02, 2020 by Christian Brauner Committed by Stéphane Graber Apr 02, 2020
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utils.c src/lxc/utils.c +2 -2

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--- a/src/lxc/utils.c
+++ b/src/lxc/utils.c
@@ -1336,7 +1336,7 @@ bool lxc_switch_uid_gid(uid_t uid, gid_t gid)
 	int ret = 0;
 	if (gid != LXC_INVALID_GID) {
-		ret = setgid(gid);
+		ret = setresgid(gid, gid, gid);
 		if (ret < 0) {
 			SYSERROR("Failed to switch to gid %d", gid);
 			return false;
@@ -1345,7 +1345,7 @@ bool lxc_switch_uid_gid(uid_t uid, gid_t gid)
 	}
 	if (uid != LXC_INVALID_UID) {
-		ret = setuid(uid);
+		ret = setresuid(uid, uid, uid);
 		if (ret < 0) {
 			SYSERROR("Failed to switch to uid %d", uid);
 			return false;