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authorMichal Schmidt <mschmidt@redhat.com>2013-01-26 00:16:13 +0100
committerMichal Schmidt <mschmidt@redhat.com>2013-01-26 00:16:13 +0100
commitf2956e80c99cd41ca6bbbe41b09e01b234ca8778 (patch)
tree3658e3a1e80f6514cc8687e98fffb4c79ba9ad76
parente45460d666512db4f908f86e8722d7932dcf0f82 (diff)
nspawn: assume stdout is always writable if it does not support epoll
stdout can be redirected to a regular file. Regular files don't support epoll. nspawn failed with: "Failed to register fds in epoll: Operation not permitted". If stdout does not support epoll, assume it's always writable.
-rw-r--r--src/nspawn/nspawn.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index 62dc20d824..4c8737132b 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -885,8 +885,17 @@ static int process_pty(int master, pid_t pid, sigset_t *mask) {
signal_ev.events = EPOLLIN;
signal_ev.data.fd = signal_fd;
- if (epoll_ctl(ep, EPOLL_CTL_ADD, STDOUT_FILENO, &stdout_ev) < 0 ||
- epoll_ctl(ep, EPOLL_CTL_ADD, master, &master_ev) < 0 ||
+ if (epoll_ctl(ep, EPOLL_CTL_ADD, STDOUT_FILENO, &stdout_ev) < 0) {
+ if (errno != EPERM) {
+ log_error("Failed to register stdout in epoll: %m");
+ r = -errno;
+ goto finish;
+ }
+ /* stdout without epoll support. Likely redirected to regular file. */
+ stdout_writable = true;
+ }
+
+ if (epoll_ctl(ep, EPOLL_CTL_ADD, master, &master_ev) < 0 ||
epoll_ctl(ep, EPOLL_CTL_ADD, signal_fd, &signal_ev) < 0) {
log_error("Failed to register fds in epoll: %m");
r = -errno;