r2336, r2337, r2339, r2390 merge:

bugfixes in error logging:
*) ngx_strerror_r() style and size == 0 bug fix
*) increase ngx_conf_log_error() buffer
*) always log an error code
*) fix segfault on close error
*) compact win32 errno logging

1 files changed, 6 insertions, 4 deletions

diff --git a/src/os/unix/ngx_errno.c b/src/os/unix/ngx_errno.c
index a3addf00c..a250f496d 100644
--- a/src/os/unix/ngx_errno.c
+++ b/src/os/unix/ngx_errno.c
@@ -10,10 +10,11 @@
 
 #if (NGX_HAVE_STRERROR_R)
 
-u_char *ngx_strerror_r(int err, u_char *errstr, size_t size)
+u_char *
+ngx_strerror_r(int err, u_char *errstr, size_t size)
 {
     if (size == 0) {
-        return 0;
+        return errstr;
     }
 
     errstr[0] = '\0';
@@ -32,12 +33,13 @@ u_char *ngx_strerror_r(int err, u_char *errstr, size_t size)
 
 /* Linux strerror_r() */
 
-u_char *ngx_strerror_r(int err, u_char *errstr, size_t size)
+u_char *
+ngx_strerror_r(int err, u_char *errstr, size_t size)
 {
     char  *str;
 
     if (size == 0) {
-        return 0;
+        return errstr;
     }
 
     errstr[0] = '\0';