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/*
* Copyright (C) Igor Sysoev
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
int ngx_argc;
char **ngx_argv;
char **ngx_os_argv;
ngx_int_t ngx_last_process;
ngx_process_t ngx_processes[NGX_MAX_PROCESSES];
ngx_pid_t
ngx_spawn_process(ngx_cycle_t *cycle, char *name, ngx_int_t respawn)
{
u_long rc, n, code;
ngx_int_t s;
ngx_pid_t pid;
ngx_exec_ctx_t ctx;
HANDLE events[2];
char file[MAX_PATH + 1];
if (respawn >= 0) {
s = respawn;
} else {
for (s = 0; s < ngx_last_process; s++) {
if (ngx_processes[s].handle == NULL) {
break;
}
}
if (s == NGX_MAX_PROCESSES) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"no more than %d processes can be spawned",
NGX_MAX_PROCESSES);
return NGX_INVALID_PID;
}
}
n = GetModuleFileName(NULL, file, MAX_PATH);
if (n == 0) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"GetModuleFileName() failed");
return NGX_INVALID_PID;
}
file[n] = '\0';
ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
"GetModuleFileName: \"%s\"", file);
ctx.path = file;
ctx.name = name;
ctx.args = GetCommandLine();
ctx.argv = NULL;
ctx.envp = NULL;
pid = ngx_execute(cycle, &ctx);
if (pid == NGX_INVALID_PID) {
return pid;
}
ngx_memzero(&ngx_processes[s], sizeof(ngx_process_t));
ngx_processes[s].handle = ctx.child;
ngx_processes[s].pid = pid;
ngx_processes[s].name = name;
ngx_sprintf(ngx_processes[s].term_event, "ngx_%s_term_%P%Z", name, pid);
ngx_sprintf(ngx_processes[s].quit_event, "ngx_%s_quit_%P%Z", name, pid);
ngx_sprintf(ngx_processes[s].reopen_event, "ngx_%s_reopen_%P%Z",
name, pid);
events[0] = ngx_master_process_event;
events[1] = ctx.child;
rc = WaitForMultipleObjects(2, events, 0, 5000);
ngx_time_update();
ngx_log_debug1(NGX_LOG_DEBUG_CORE, cycle->log, 0,
"WaitForMultipleObjects: %ul", rc);
switch (rc) {
case WAIT_OBJECT_0:
ngx_processes[s].term = OpenEvent(EVENT_MODIFY_STATE, 0,
(char *) ngx_processes[s].term_event);
if (ngx_processes[s].term == NULL) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"OpenEvent(\"%s\") failed",
ngx_processes[s].term_event);
goto failed;
}
ngx_processes[s].quit = OpenEvent(EVENT_MODIFY_STATE, 0,
(char *) ngx_processes[s].quit_event);
if (ngx_processes[s].quit == NULL) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"OpenEvent(\"%s\") failed",
ngx_processes[s].quit_event);
goto failed;
}
ngx_processes[s].reopen = OpenEvent(EVENT_MODIFY_STATE, 0,
(char *) ngx_processes[s].reopen_event);
if (ngx_processes[s].reopen == NULL) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"OpenEvent(\"%s\") failed",
ngx_processes[s].reopen_event);
goto failed;
}
if (ResetEvent(ngx_master_process_event) == 0) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"ResetEvent(\"%s\") failed",
ngx_master_process_event_name);
goto failed;
}
break;
case WAIT_OBJECT_0 + 1:
if (GetExitCodeProcess(ctx.child, &code) == 0) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"GetExitCodeProcess(%P) failed", pid);
}
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"%s process %P exited with code %Xl",
name, pid, code);
goto failed;
case WAIT_TIMEOUT:
ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
"the event \"%s\" was not signaled for 5s",
ngx_master_process_event_name);
goto failed;
case WAIT_FAILED:
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"WaitForSingleObject(\"%s\") failed",
ngx_master_process_event_name);
goto failed;
}
if (respawn >= 0) {
return pid;
}
switch (respawn) {
case NGX_PROCESS_RESPAWN:
ngx_processes[s].just_spawn = 0;
break;
case NGX_PROCESS_JUST_RESPAWN:
ngx_processes[s].just_spawn = 1;
break;
}
if (s == ngx_last_process) {
ngx_last_process++;
}
return pid;
failed:
if (ngx_processes[s].reopen) {
ngx_close_handle(ngx_processes[s].reopen);
}
if (ngx_processes[s].quit) {
ngx_close_handle(ngx_processes[s].quit);
}
if (ngx_processes[s].term) {
ngx_close_handle(ngx_processes[s].term);
}
TerminateProcess(ngx_processes[s].handle, 2);
if (ngx_processes[s].handle) {
ngx_close_handle(ngx_processes[s].handle);
ngx_processes[s].handle = NULL;
}
return NGX_INVALID_PID;
}
ngx_pid_t
ngx_execute(ngx_cycle_t *cycle, ngx_exec_ctx_t *ctx)
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
ngx_memzero(&si, sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
ngx_memzero(&pi, sizeof(PROCESS_INFORMATION));
if (CreateProcess(ctx->path, ctx->args,
NULL, NULL, 0, CREATE_NO_WINDOW, NULL, NULL, &si, &pi)
== 0)
{
ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_errno,
"CreateProcess(\"%s\") failed", ngx_argv[0]);
return 0;
}
ctx->child = pi.hProcess;
if (CloseHandle(pi.hThread) == 0) {
ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
"CloseHandle(pi.hThread) failed");
}
ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0,
"start %s process %P", ctx->name, pi.dwProcessId);
return pi.dwProcessId;
}
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