[nginx] Core: fixed handling of "stderr" in error_log.

[Homutov Vladimir]

details:   http://hg.nginx.org/nginx/rev/d8af1005e886
branches:  
changeset: 5240:d8af1005e886
user:      Vladimir Homutov <vl at nginx.com>
date:      Tue Jun 04 11:27:36 2013 +0400
description:
Core: fixed handling of "stderr" in error_log.

If "stderr" was specified in one of the "error_log" directives,
stderr is not redirected to the first error_log on startup,
configuration reload, and reopening log files.

diffstat:

 src/core/nginx.c                |  2 +-
 src/core/ngx_cycle.c            |  7 ++++---
 src/core/ngx_cycle.h            |  2 ++
 src/core/ngx_log.c              |  1 +
 src/http/ngx_http_core_module.c |  1 +
 5 files changed, 9 insertions(+), 4 deletions(-)

diffs (70 lines):

diff -r 85e72ea8fbfd -r d8af1005e886 src/core/nginx.c
--- a/src/core/nginx.c	Mon Jun 03 16:54:28 2013 +0400
+++ b/src/core/nginx.c	Tue Jun 04 11:27:36 2013 +0400
@@ -387,7 +387,7 @@ main(int argc, char *const *argv)
         return 1;
     }
 
-    if (cycle->log->file->fd != ngx_stderr) {
+    if (!cycle->log_use_stderr && cycle->log->file->fd != ngx_stderr) {
 
         if (ngx_set_stderr(cycle->log->file->fd) == NGX_FILE_ERROR) {
             ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
diff -r 85e72ea8fbfd -r d8af1005e886 src/core/ngx_cycle.c
--- a/src/core/ngx_cycle.c	Mon Jun 03 16:54:28 2013 +0400
+++ b/src/core/ngx_cycle.c	Tue Jun 04 11:27:36 2013 +0400
@@ -582,8 +582,9 @@ ngx_init_cycle(ngx_cycle_t *old_cycle)
 
     /* commit the new cycle configuration */
 
-    if (!ngx_use_stderr && cycle->log->file->fd != ngx_stderr) {
-
+    if (!ngx_use_stderr && !cycle->log_use_stderr
+        && cycle->log->file->fd != ngx_stderr)
+    {
         if (ngx_set_stderr(cycle->log->file->fd) == NGX_FILE_ERROR) {
             ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
                           ngx_set_stderr_n " failed");
@@ -1228,7 +1229,7 @@ ngx_reopen_files(ngx_cycle_t *cycle, ngx
         file[i].fd = fd;
     }
 
-    if (cycle->log->file->fd != ngx_stderr) {
+    if (!cycle->log_use_stderr && cycle->log->file->fd != ngx_stderr) {
 
         if (ngx_set_stderr(cycle->log->file->fd) == NGX_FILE_ERROR) {
             ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
diff -r 85e72ea8fbfd -r d8af1005e886 src/core/ngx_cycle.h
--- a/src/core/ngx_cycle.h	Mon Jun 03 16:54:28 2013 +0400
+++ b/src/core/ngx_cycle.h	Tue Jun 04 11:27:36 2013 +0400
@@ -41,6 +41,8 @@ struct ngx_cycle_s {
     ngx_log_t                *log;
     ngx_log_t                 new_log;
 
+    ngx_uint_t                log_use_stderr;  /* unsigned  log_use_stderr:1; */
+
     ngx_connection_t        **files;
     ngx_connection_t         *free_connections;
     ngx_uint_t                free_connection_n;
diff -r 85e72ea8fbfd -r d8af1005e886 src/core/ngx_log.c
--- a/src/core/ngx_log.c	Mon Jun 03 16:54:28 2013 +0400
+++ b/src/core/ngx_log.c	Tue Jun 04 11:27:36 2013 +0400
@@ -438,6 +438,7 @@ ngx_error_log(ngx_conf_t *cf, ngx_comman
 
     if (ngx_strcmp(value[1].data, "stderr") == 0) {
         ngx_str_null(&name);
+        cf->cycle->log_use_stderr = 1;
 
     } else {
         name = value[1];
diff -r 85e72ea8fbfd -r d8af1005e886 src/http/ngx_http_core_module.c
--- a/src/http/ngx_http_core_module.c	Mon Jun 03 16:54:28 2013 +0400
+++ b/src/http/ngx_http_core_module.c	Tue Jun 04 11:27:36 2013 +0400
@@ -4898,6 +4898,7 @@ ngx_http_core_error_log(ngx_conf_t *cf, 
 
     if (ngx_strcmp(value[1].data, "stderr") == 0) {
         ngx_str_null(&name);
+        cf->cycle->log_use_stderr = 1;
 
     } else {
         name = value[1];