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authornandfan <fanyufei521@outlook.com>2021-02-22 17:17:17 +0800
committerFlorin Coras <florin.coras@gmail.com>2021-02-22 23:14:15 +0000
commit5fdc47c237b3e370dc18d3ed593ce3bd7c346110 (patch)
tree49e0592e3de60f50482fe9aadf7dd49eafea210d /src/vcl
parent6baa45cbf40f800fa1982ba8363a2ebf55b69328 (diff)
vcl: fix vls_intercept_sigchld_handler be called recursively
The old_sa is rewrite with vls_intercept_sigchld_handler when parent process fork child second time, parent process will call vls_intercept_sigchld_handler recursively when received child signal. Type: fix Signed-off-by: nandfan <fanyufei521@outlook.com> Change-Id: Ia58a254d58058489aa2d91b76a3b3cab1e38f802
Diffstat (limited to 'src/vcl')
-rw-r--r--src/vcl/vcl_locked.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/vcl/vcl_locked.c b/src/vcl/vcl_locked.c
index 90ee73546b1..95da1aab54b 100644
--- a/src/vcl/vcl_locked.c
+++ b/src/vcl/vcl_locked.c
@@ -1561,6 +1561,11 @@ static void
vls_incercept_sigchld ()
{
struct sigaction sa;
+ if (old_sa.sa_sigaction)
+ {
+ VDBG (0, "have intercepted sigchld");
+ return;
+ }
clib_memset (&sa, 0, sizeof (sa));
sa.sa_sigaction = vls_intercept_sigchld_handler;
sa.sa_flags = SA_SIGINFO;