systemd/0160-activate-clean-up-inherited-descriptors.patch

78 lines
2.8 KiB
Diff
Raw Normal View History

From 9b618fb2369046434ced28fe1420d8d5c75cd46e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Tue, 10 Dec 2013 21:52:11 -0500
Subject: [PATCH] activate: clean up inherited descriptors
> [simon@troela server]$ /usr/lib/systemd/systemd-activate -l 9000 main.js
> Assertion 'fd == 3 + count' failed at src/activate/activate.c:115,
> function open_sockets(). Aborting.
> Aborted (core dumped)
> after a bit debuging i found the problem:
> slim appears to leak an fd into all of its children:
> stat /proc/14004/fd/3 (14004 is the pid a random process in my session)
> File: '/proc/14004/fd/3' -> '/var/log/slim.log'
systemd-activate should be robust against the shell (or anything else) leaking
descriptors. Now everything except stdin/stdout/stderr and received sockets
will be closed.
---
src/activate/activate.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
diff --git a/src/activate/activate.c b/src/activate/activate.c
index a9461bc..6aa8b9f 100644
--- a/src/activate/activate.c
+++ b/src/activate/activate.c
@@ -137,6 +137,17 @@ static int open_sockets(int *epoll_fd, bool accept) {
count ++;
}
+ /* Close logging and all other descriptors */
+ if (arg_listen) {
+ int except[3 + n];
+
+ for (fd = 0; fd < SD_LISTEN_FDS_START + n; fd++)
+ except[fd] = fd;
+
+ log_close();
+ close_all_fds(except, 3 + n);
+ }
+
/** Note: we leak some fd's on error here. I doesn't matter
* much, since the program will exit immediately anyway, but
* would be a pain to fix.
@@ -147,6 +158,7 @@ static int open_sockets(int *epoll_fd, bool accept) {
fd = make_socket_fd(*address, SOCK_STREAM | (arg_accept*SOCK_CLOEXEC));
if (fd < 0) {
+ log_open();
log_error("Failed to open '%s': %s", *address, strerror(-fd));
return fd;
}
@@ -154,6 +166,9 @@ static int open_sockets(int *epoll_fd, bool accept) {
count ++;
}
+ if (arg_listen)
+ log_open();
+
*epoll_fd = epoll_create1(EPOLL_CLOEXEC);
if (*epoll_fd < 0) {
log_error("Failed to create epoll object: %m");
@@ -298,10 +313,10 @@ static void sigchld_hdl(int sig, siginfo_t *t, void *data) {
static int install_chld_handler(void) {
int r;
- struct sigaction act;
- zero(act);
- act.sa_flags = SA_SIGINFO;
- act.sa_sigaction = sigchld_hdl;
+ struct sigaction act = {
+ .sa_flags = SA_SIGINFO,
+ .sa_sigaction = sigchld_hdl,
+ };
r = sigaction(SIGCHLD, &act, 0);
if (r < 0)