int fpm_stdio_init_final() /* {{{ */
{
if (fpm_global_config.daemonize) {
/* prevent duping if logging to syslog */
if (fpm_globals.error_log_fd > 0 && fpm_globals.error_log_fd != STDERR_FILENO) {
/* there might be messages to stderr from other parts of the code, we need to log them all */
if (0 > dup2(fpm_globals.error_log_fd, STDERR_FILENO)) {
zlog(ZLOG_SYSERROR, "failed to init stdio: dup2()");
return -1;
}
}
}
zlog_set_launched();
return 0;
}
static inline int fpm_use_error_log() { /* {{{ */
/*
* the error_log is NOT used when running in foreground
* and from a tty (user looking at output).
* So, error_log is used by
* - SysV init launch php-fpm as a daemon
* - Systemd launch php-fpm in foreground
*/
#if HAVE_UNISTD_H
if (fpm_global_config.daemonize || (!isatty(STDERR_FILENO) && !fpm_globals.force_stderr)) {
#else
if (fpm_global_config.daemonize) {
#endif
return 1;
}
return 0;
}
/* }}} */
int fpm_stdio_init_final() /* {{{ */
{
if (fpm_use_error_log()) {
/* prevent duping if logging to syslog */
if (fpm_globals.error_log_fd > 0 && fpm_globals.error_log_fd != STDERR_FILENO) {
/* there might be messages to stderr from other parts of the code, we need to log them all */
if (0 > dup2(fpm_globals.error_log_fd, STDERR_FILENO)) {
zlog(ZLOG_SYSERROR, "failed to init stdio: dup2()");
return -1;
}
}
}
zlog_set_launched();
return 0;
}
/* }}} */
int fpm_stdio_init_child(struct fpm_worker_pool_s *wp) /* {{{ */
{
#ifdef HAVE_SYSLOG_H
if (fpm_globals.error_log_fd == ZLOG_SYSLOG) {
closelog(); /* ensure to close syslog not to interrupt with PHP syslog code */
} else
#endif
/* Notice: child cannot use master error_log
* because not aware when being reopen
* else, should use if (!fpm_use_error_log())
*/
if (fpm_globals.error_log_fd > 0) {
close(fpm_globals.error_log_fd);
}
fpm_globals.error_log_fd = -1;
zlog_set_fd(-1);
if (wp->listening_socket != STDIN_FILENO) {
if (0 > dup2(wp->listening_socket, STDIN_FILENO)) {
zlog(ZLOG_SYSERROR, "failed to init child stdio: dup2()");
return -1;
}
}
return 0;
}
/* }}} */
static void fpm_stdio_child_said(struct fpm_event_s *ev, short which, void *arg) /* {{{ */
{
static const int max_buf_size = 1024;
int fd = ev->fd;
char buf[max_buf_size];
struct fpm_child_s *child;
int is_stdout;
struct fpm_event_s *event;
int fifo_in = 1, fifo_out = 1;
int is_last_message = 0;
int in_buf = 0;
int res;
if (!arg) {
return;
}
child = (struct fpm_child_s *)arg;
is_stdout = (fd == child->fd_stdout);
if (is_stdout) {
event = &child->ev_stdout;
} else {
event = &child->ev_stderr;
}
while (fifo_in || fifo_out) {
if (fifo_in) {
res = read(fd, buf + in_buf, max_buf_size - 1 - in_buf);
if (res <= 0) { /* no data */
fifo_in = 0;
if (res < 0 && (errno == EAGAIN || errno == EWOULDBLOCK)) {
/* just no more data ready */
} else { /* error or pipe is closed */
if (res < 0) { /* error */
zlog(ZLOG_SYSERROR, "unable to read what child say");
}
fpm_event_del(event);
is_last_message = 1;
if (is_stdout) {
close(child->fd_stdout);
child->fd_stdout = -1;
} else {
close(child->fd_stderr);
child->fd_stderr = -1;
}
}
} else {
in_buf += res;
}
}
if (fifo_out) {
if (in_buf == 0) {
fifo_out = 0;
} else {
char *nl;
int should_print = 0;
buf[in_buf] = '\0';
/* FIXME: there might be binary data */
/* we should print if no more space in the buffer */
if (in_buf == max_buf_size - 1) {
should_print = 1;
}
/* we should print if no more data to come */
if (!fifo_in) {
should_print = 1;
}
nl = strchr(buf, '\n');
if (nl || should_print) {
if (nl) {
*nl = '\0';
}
zlog(ZLOG_WARNING, "[pool %s] child %d said into %s: \"%s\"%s", child->wp->config->name,
(int) child->pid, is_stdout ? "stdout" : "stderr", buf, is_last_message ? ", pipe is closed" : "");
if (nl) {
int out_buf = 1 + nl - buf;
memmove(buf, buf + out_buf, in_buf - out_buf);
in_buf -= out_buf;
} else {
in_buf = 0;
}
}
}
}
}
}
/* }}} */
int fpm_stdio_prepare_pipes(struct fpm_child_s *child) /* {{{ */
{
if (0 == child->wp->config->catch_workers_output) { /* not required */
return 0;
}
if (0 > pipe(fd_stdout)) {
zlog(ZLOG_SYSERROR, "failed to prepare the stdout pipe");
return -1;
}
if (0 > pipe(fd_stderr)) {
zlog(ZLOG_SYSERROR, "failed to prepare the stderr pipe");
close(fd_stdout[0]);
close(fd_stdout[1]);
return -1;
}
if (0 > fd_set_blocked(fd_stdout[0], 0) || 0 > fd_set_blocked(fd_stderr[0], 0)) {
zlog(ZLOG_SYSERROR, "failed to unblock pipes");
close(fd_stdout[0]);
close(fd_stdout[1]);
close(fd_stderr[0]);
close(fd_stderr[1]);
return -1;
}
return 0;
}
/* }}} */
int fpm_stdio_parent_use_pipes(struct fpm_child_s *child) /* {{{ */
{
if (0 == child->wp->config->catch_workers_output) { /* not required */
return 0;
}
close(fd_stdout[1]);
close(fd_stderr[1]);
child->fd_stdout = fd_stdout[0];
child->fd_stderr = fd_stderr[0];
fpm_event_set(&child->ev_stdout, child->fd_stdout, FPM_EV_READ, fpm_stdio_child_said, child);
fpm_event_add(&child->ev_stdout, 0);
fpm_event_set(&child->ev_stderr, child->fd_stderr, FPM_EV_READ, fpm_stdio_child_said, child);
fpm_event_add(&child->ev_stderr, 0);
return 0;
}
/* }}} */
int fpm_stdio_discard_pipes(struct fpm_child_s *child) /* {{{ */
{
if (0 == child->wp->config->catch_workers_output) { /* not required */
return 0;
}
close(fd_stdout[1]);
close(fd_stderr[1]);
close(fd_stdout[0]);
close(fd_stderr[0]);
return 0;
}
/* }}} */
void fpm_stdio_child_use_pipes(struct fpm_child_s *child) /* {{{ */
{
if (child->wp->config->catch_workers_output) {
dup2(fd_stdout[1], STDOUT_FILENO);
dup2(fd_stderr[1], STDERR_FILENO);
close(fd_stdout[0]); close(fd_stdout[1]);
close(fd_stderr[0]); close(fd_stderr[1]);
} else {
/* stdout of parent is always /dev/null */
dup2(STDOUT_FILENO, STDERR_FILENO);
}
}
/* }}} */
int fpm_stdio_open_error_log(int reopen) /* {{{ */
{
int fd;
#ifdef HAVE_SYSLOG_H
if (!strcasecmp(fpm_global_config.error_log, "syslog")) {
openlog(fpm_global_config.syslog_ident, LOG_PID | LOG_CONS, fpm_global_config.syslog_facility);
fpm_globals.error_log_fd = ZLOG_SYSLOG;
if (fpm_use_error_log()) {
zlog_set_fd(fpm_globals.error_log_fd);
}
return 0;
}
#endif
fd = open(fpm_global_config.error_log, O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR);
if (0 > fd) {
zlog(ZLOG_SYSERROR, "failed to open error_log (%s)", fpm_global_config.error_log);
return -1;
}
if (reopen) {
if (fpm_use_error_log()) {
dup2(fd, STDERR_FILENO);
}
dup2(fd, fpm_globals.error_log_fd);
close(fd);
fd = fpm_globals.error_log_fd; /* for FD_CLOSEXEC to work */
} else {
fpm_globals.error_log_fd = fd;
if (fpm_use_error_log()) {
zlog_set_fd(fpm_globals.error_log_fd);
}
}
if (0 > fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC)) {
zlog(ZLOG_WARNING, "failed to change attribute of error_log");
}
return 0;
}