nss_winbind: When returning NSS_UNAVAIL, squash errno to ENOENT
[tprouty/samba.git] / source / nsswitch / wb_common.c
index 2ae85dc..6e6d2bb 100644 (file)
@@ -168,54 +168,55 @@ static int winbind_named_pipe_sock(const char *dir)
 {
        struct sockaddr_un sunaddr;
        struct stat st;
-       pstring path;
+       char *path = NULL;
        int fd;
        int wait_time;
        int slept;
-       
+
        /* Check permissions on unix socket directory */
-       
+
        if (lstat(dir, &st) == -1) {
+               errno = ENOENT;
                return -1;
        }
-       
-       if (!S_ISDIR(st.st_mode) || 
+
+       if (!S_ISDIR(st.st_mode) ||
            (st.st_uid != 0 && st.st_uid != geteuid())) {
+               errno = ENOENT;
                return -1;
        }
-       
+
        /* Connect to socket */
-       
-       strncpy(path, dir, sizeof(path) - 1);
-       path[sizeof(path) - 1] = '\0';
-       
-       strncat(path, "/", sizeof(path) - 1 - strlen(path));
-       path[sizeof(path) - 1] = '\0';
-       
-       strncat(path, WINBINDD_SOCKET_NAME, sizeof(path) - 1 - strlen(path));
-       path[sizeof(path) - 1] = '\0';
-       
+
+       if (asprintf(&path, "%s/%s", dir, WINBINDD_SOCKET_NAME) < 0) {
+               return -1;
+       }
+
        ZERO_STRUCT(sunaddr);
        sunaddr.sun_family = AF_UNIX;
        strncpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path) - 1);
-       
+
        /* If socket file doesn't exist, don't bother trying to connect
           with retry.  This is an attempt to make the system usable when
           the winbindd daemon is not running. */
 
        if (lstat(path, &st) == -1) {
+               errno = ENOENT;
+               SAFE_FREE(path);
                return -1;
        }
-       
+
+       SAFE_FREE(path);
        /* Check permissions on unix socket file */
-       
-       if (!S_ISSOCK(st.st_mode) || 
+
+       if (!S_ISSOCK(st.st_mode) ||
            (st.st_uid != 0 && st.st_uid != geteuid())) {
+               errno = ENOENT;
                return -1;
        }
-       
+
        /* Connect to socket */
-       
+
        if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
                return -1;
        }
@@ -371,6 +372,7 @@ int winbind_write_sock(void *buffer, int count, int recursing, int need_priv)
  restart:
        
        if (winbind_open_pipe_sock(recursing, need_priv) == -1) {
+               errno = ENOENT;
                return -1;
        }
        
@@ -541,18 +543,6 @@ int winbindd_read_reply(struct winbindd_response *response)
        return result1 + result2;
 }
 
-bool winbind_env_set(void)
-{
-       char *env;
-       
-       if ((env=getenv(WINBINDD_DONT_ENV)) != NULL) {
-               if(strcmp(env, "1") == 0) {
-                       return true;
-               }
-       }
-       return false;
-}
-
 /* 
  * send simple types of requests 
  */
@@ -579,7 +569,11 @@ NSS_STATUS winbindd_send_request(int req_type, int need_priv,
        
        if (winbind_write_sock(request, sizeof(*request),
                               request->wb_flags & WBFLAG_RECURSE,
-                              need_priv) == -1) {
+                              need_priv) == -1) 
+       {
+               /* Set ENOENT for consistency.  Required by some apps */
+               errno = ENOENT;
+               
                return NSS_STATUS_UNAVAIL;
        }
 
@@ -587,7 +581,11 @@ NSS_STATUS winbindd_send_request(int req_type, int need_priv,
            (winbind_write_sock(request->extra_data.data,
                                request->extra_len,
                                request->wb_flags & WBFLAG_RECURSE,
-                               need_priv) == -1)) {
+                               need_priv) == -1)) 
+       {
+               /* Set ENOENT for consistency.  Required by some apps */
+               errno = ENOENT;
+
                return NSS_STATUS_UNAVAIL;
        }
        
@@ -611,6 +609,9 @@ NSS_STATUS winbindd_get_response(struct winbindd_response *response)
 
        /* Wait for reply */
        if (winbindd_read_reply(response) == -1) {
+               /* Set ENOENT for consistency.  Required by some apps */
+               errno = ENOENT;
+
                return NSS_STATUS_UNAVAIL;
        }
 
@@ -665,21 +666,6 @@ NSS_STATUS winbindd_priv_request_response(int req_type,
        return status;
 }
 
-/*************************************************************************
- A couple of simple functions to disable winbindd lookups and re-
- enable them
- ************************************************************************/
-bool winbind_off(void)
-{
-       return setenv(WINBINDD_DONT_ENV, "1", 1) != -1;
-}
-
-bool winbind_on(void)
-{
-       return setenv(WINBINDD_DONT_ENV, "0", 1) != -1;
-}
-
 /*************************************************************************
  ************************************************************************/