execute: pass /proc/self/fd/<nr>

Passing /proc/1/fd/<nr> presupposes that CLONE_NEWPID was specified. This isn't the case when users use lxc.namespace.keep = pid to inherit pid namespaces. Pass /proc/self/fd/<nr> instead. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Reported-by: Mrinal Dhillon <mdhillon@juniper.net>

execute: pass /proc/self/fd/<nr>
bf58a980 · Christian Brauner · f24e4d00 · bf58a980
Unverified Commit bf58a980 authored Aug 23, 2018 by Christian Brauner
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execute.c src/lxc/execute.c +1 -1

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--- a/src/lxc/execute.c
+++ b/src/lxc/execute.c
@@ -95,7 +95,7 @@ static int execute_start(struct lxc_handler *handler, void* data)
 			goto out2;
 		}
-		ret = snprintf(logfile, sizeof(logfile), "/proc/1/fd/%d", logfd);
+		ret = snprintf(logfile, sizeof(logfile), "/proc/self/fd/%d", logfd);
 		if (ret < 0 || (size_t)ret >= sizeof(logfile))
 			goto out3;