Mercurial > hg > nginx
view src/os/win32/ngx_process.c @ 7690:8253424d1aff
Added size check to ngx_http_alloc_large_header_buffer().
This ensures that copying won't write more than the buffer size
even if the buffer comes from hc->free and it is smaller than the large
client header buffer size in the virtual host configuration. This might
happen if size of large client header buffers is different in name-based
virtual hosts, similarly to the problem with number of buffers fixed
in 6926:e662cbf1b932.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 06 Aug 2020 05:02:22 +0300 |
parents | 7640d6c213e1 |
children |
line wrap: on
line source
/* * 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; }