[PATCH v4 RESEND 5/5] Don't try to chmod(2) abstract Unix domain sockets.

[Alejandro Colomar]

Don't try to handle Unix sockets starting with a '\0' as if they
were files, since they represent abstract sockets.

As we're using the "pretty" name generated by ngx_sock_ntop(),
which translates the '\0' into '@', test for '@'.

Co-developed-by: Andrew Clayton <a.clayton at f5.com>
Signed-off-by: Andrew Clayton <a.clayton at f5.com>
Signed-off-by: Alejandro Colomar <alx.manpages at gmail.com>
Cc: Bjornar Ness <bjornar.ness at gmail.com>
---
 src/core/ngx_connection.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/src/core/ngx_connection.c b/src/core/ngx_connection.c
index fe729a78..1d041704 100644
--- a/src/core/ngx_connection.c
+++ b/src/core/ngx_connection.c
@@ -633,17 +633,19 @@ ngx_open_listening_sockets(ngx_cycle_t *cycle)
                 u_char  *name;
 
                 name = ls[i].addr_text.data + sizeof("unix:") - 1;
-                mode = (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
+                if (name[0] != '@') {
+                    mode = (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH);
 
-                if (chmod((char *) name, mode) == -1) {
-                    ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
-                                  "chmod() \"%s\" failed", name);
-                }
-
-                if (ngx_test_config) {
-                    if (ngx_delete_file(name) == NGX_FILE_ERROR) {
+                    if (chmod((char *) name, mode) == -1) {
                         ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
-                                      ngx_delete_file_n " %s failed", name);
+                                      "chmod() \"%s\" failed", name);
+                    }
+
+                    if (ngx_test_config) {
+                        if (ngx_delete_file(name) == NGX_FILE_ERROR) {
+                            ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
+                                          ngx_delete_file_n " %s failed", name);
+                        }
                     }
                 }
             }
@@ -1078,9 +1080,11 @@ ngx_close_listening_sockets(ngx_cycle_t *cycle)
         {
             u_char *name = ls[i].addr_text.data + sizeof("unix:") - 1;
 
-            if (ngx_delete_file(name) == NGX_FILE_ERROR) {
-                ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
-                              ngx_delete_file_n " %s failed", name);
+            if (name[0] != '@') {
+                if (ngx_delete_file(name) == NGX_FILE_ERROR) {
+                    ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno,
+                                  ngx_delete_file_n " %s failed", name);
+                }
             }
         }
 
-- 
2.37.2