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explicitly close file descriptors in child to escape epoll signaling wrong events

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This commit is contained in:
Roman Arutyunyan
2012-10-18 22:15:27 +04:00
parent 795c1538a3
commit ff1c7ecec5
2 changed files with 16 additions and 3 deletions
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17
ngx_rtmp_exec_module.c
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@ -308,10 +308,10 @@ ngx_rtmp_exec_kill(ngx_rtmp_session_t *s, ngx_rtmp_exec_t *e, ngx_int_t term)
static ngx_int_t
ngx_rtmp_exec_run(ngx_rtmp_session_t *s, size_t n)
{
#ifndef NGX_WIN32
#if !(NGX_WIN32)
ngx_rtmp_exec_app_conf_t *eacf;
ngx_rtmp_exec_ctx_t *ctx;
int pid, fd;
int pid, fd, maxfd;
int pipefd[2];
int ret;
ngx_rtmp_exec_conf_t *ec;
@ -325,6 +325,8 @@ ngx_rtmp_exec_run(ngx_rtmp_session_t *s, size_t n)
ctx = ngx_rtmp_get_module_ctx(s, ngx_rtmp_exec_module);
e = ctx->execs + n;
ngx_memzero(e, sizeof(*e));
ngx_log_debug1(NGX_LOG_DEBUG_RTMP, s->connection->log, 0,
"exec: starting child '%V'",
&ec->cmd);
@ -360,6 +362,17 @@ ngx_rtmp_exec_run(ngx_rtmp_session_t *s, size_t n)
case 0:
/* child */
/* close all descriptors but pipe write end */
maxfd = sysconf(_SC_OPEN_MAX);
for (fd = 0; fd < maxfd; ++fd) {
if (fd == pipefd[1]) {
continue;
}
close(fd);
}
fd = open("/dev/null", O_RDWR);
dup2(fd, STDIN_FILENO);