From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Tue, 2 Feb 2021 18:29:41 +0000 (+0100)
Subject: cgroups: rewind() file before polling again
X-Git-Tag: lxc-5.0.0~305^2~18
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=281c36454a3d00ec6ede254af44bef268108eea2;p=thirdparty%2Flxc.git

cgroups: rewind() file before polling again

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

diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c
index 533c1f449..78802ac76 100644
--- a/src/lxc/cgroups/cgfsng.c
+++ b/src/lxc/cgroups/cgfsng.c
@@ -2033,9 +2033,6 @@ static int freezer_cgroup_events_cb(int fd, uint32_t events, void *cbdata,
 	size_t len;
 	const char *state_string;
 
-	if (lseek(fd, 0, SEEK_SET) < (off_t)-1)
-		return LXC_MAINLOOP_ERROR;
-
 	f = fdopen_at(fd, "", "re", PROTECT_OPEN, PROTECT_LOOKUP_BENEATH);
 	if (!f)
 		return LXC_MAINLOOP_ERROR;
@@ -2049,6 +2046,8 @@ static int freezer_cgroup_events_cb(int fd, uint32_t events, void *cbdata,
 		if (strncmp(line, state_string, STRLITERALLEN("frozen") + 2) == 0)
 			return LXC_MAINLOOP_CLOSE;
 
+	rewind(f);
+
 	return LXC_MAINLOOP_CONTINUE;
 }