Simplify by avoiding confusing use of strncpy etc.

[bpt/emacs.git] / lib-src / pop.c

diff --git a/lib-src/pop.c b/lib-src/pop.c
index b8ed65c..74054e0 100644 (file)
--- a/lib-src/pop.c
+++ b/lib-src/pop.c
@@ -340,10 +340,7 @@ pop_stat (popserver server, int *count, int *size)
   if (strncmp (fromserver, "+OK ", 4))
     {
       if (0 == strncmp (fromserver, "-ERR", 4))
-       {
-         strncpy (pop_error, fromserver, ERROR_MAX);
-         pop_error[ERROR_MAX-1] = '\0';
-       }
+       snprintf (pop_error, ERROR_MAX, "%s", fromserver);
       else
        {
          strcpy (pop_error,
@@ -444,10 +441,7 @@ pop_list (popserver server, int message, int **IDs, int **sizes)
       if (strncmp (fromserver, "+OK ", 4))
        {
          if (! strncmp (fromserver, "-ERR", 4))
-           {
-             strncpy (pop_error, fromserver, ERROR_MAX);
-             pop_error[ERROR_MAX-1] = '\0';
-           }
+           snprintf (pop_error, ERROR_MAX, "%s", fromserver);
          else
            {
              strcpy (pop_error,
@@ -686,8 +680,7 @@ pop_multi_first (popserver server, const char *command, char **response)
 
   if (0 == strncmp (*response, "-ERR", 4))
     {
-      strncpy (pop_error, *response, ERROR_MAX);
-      pop_error[ERROR_MAX-1] = '\0';
+      snprintf (pop_error, ERROR_MAX, "%s", *response);
       return (-1);
     }
   else if (0 == strncmp (*response, "+OK", 3))
@@ -860,8 +853,7 @@ pop_last (popserver server)
 
   if (! strncmp (fromserver, "-ERR", 4))
     {
-      strncpy (pop_error, fromserver, ERROR_MAX);
-      pop_error[ERROR_MAX-1] = '\0';
+      snprintf (pop_error, ERROR_MAX, "%s", fromserver);
       return (-1);
     }
   else if (strncmp (fromserver, "+OK ", 4))
@@ -1061,9 +1053,8 @@ socket_connection (char *host, int flags)
   sock = socket (PF_INET, SOCK_STREAM, 0);
   if (sock < 0)
     {
-      strcpy (pop_error, POP_SOCKET_ERROR);
-      strncat (pop_error, strerror (errno),
-              ERROR_MAX - sizeof (POP_SOCKET_ERROR));
+      snprintf (pop_error, ERROR_MAX, "%s%s",
+               POP_SOCKET_ERROR, strerror (errno));
       return (-1);
 
     }
@@ -1139,9 +1130,7 @@ socket_connection (char *host, int flags)
   if (! connect_ok)
     {
       CLOSESOCKET (sock);
-      strcpy (pop_error, CONNECT_ERROR);
-      strncat (pop_error, strerror (errno),
-              ERROR_MAX - sizeof (CONNECT_ERROR));
+      snprintf (pop_error, ERROR_MAX, "%s%s", CONNECT_ERROR, strerror (errno));
       return (-1);
 
     }
@@ -1159,9 +1148,8 @@ socket_connection (char *host, int flags)
            krb5_auth_con_free (kcontext, auth_context);
          if (kcontext)
            krb5_free_context (kcontext);
-         strcpy (pop_error, KRB_ERROR);
-         strncat (pop_error, error_message (rem),
-                  ERROR_MAX - sizeof (KRB_ERROR));
+         snprintf (pop_error, ERROR_MAX, "%s%s",
+                   KRB_ERROR, error_message (rem));
          CLOSESOCKET (sock);
          return (-1);
        }
@@ -1199,30 +1187,19 @@ socket_connection (char *host, int flags)
       krb5_free_principal (kcontext, server);
       if (rem)
        {
-         strcpy (pop_error, KRB_ERROR);
-         strncat (pop_error, error_message (rem),
-                  ERROR_MAX - sizeof (KRB_ERROR));
+         int pop_error_len = snprintf (pop_error, ERROR_MAX, "%s%s",
+                                       KRB_ERROR, error_message (rem));
 #if defined HAVE_KRB5_ERROR_TEXT
          if (err_ret && err_ret->text.length)
            {
-             strncat (pop_error, " [server says '",
-                      ERROR_MAX - strlen (pop_error) - 1);
-             strncat (pop_error, err_ret->text.data,
-                      min (ERROR_MAX - strlen (pop_error) - 1,
-                           err_ret->text.length));
-             strncat (pop_error, "']",
-                      ERROR_MAX - strlen (pop_error) - 1);
+             int errlen = err_ret->text.length;
+             snprintf (pop_error + pop_error_len, ERROR_MAX - pop_error_len,
+                       " [server says '.*%s']", errlen, err_ret->text.data);
            }
 #elif defined HAVE_KRB5_ERROR_E_TEXT
-         if (err_ret && err_ret->e_text && strlen (*err_ret->e_text))
-           {
-             strncat (pop_error, " [server says '",
-                      ERROR_MAX - strlen (pop_error) - 1);
-             strncat (pop_error, *err_ret->e_text,
-                      ERROR_MAX - strlen (pop_error) - 1);
-             strncat (pop_error, "']",
-                      ERROR_MAX - strlen (pop_error) - 1);
-           }
+         if (err_ret && err_ret->e_text && **err_ret->e_text)
+           snprintf (pop_error + pop_error_len, ERRMAX - pop_error_len,
+                     " [server says '%s']", *err_ret->e_text);
 #endif
          if (err_ret)
            krb5_free_error (kcontext, err_ret);
@@ -1243,9 +1220,7 @@ socket_connection (char *host, int flags)
       free ((char *) ticket);
       if (rem != KSUCCESS)
        {
-         strcpy (pop_error, KRB_ERROR);
-         strncat (pop_error, krb_err_txt[rem],
-                  ERROR_MAX - sizeof (KRB_ERROR));
+         snprintf (pop_error, ERROR_MAX, "%s%s", KRB_ERROR, krb_err_txt[rem]);
          CLOSESOCKET (sock);
          return (-1);
        }
@@ -1350,9 +1325,8 @@ pop_getline (popserver server, char **line)
                  server->buffer_size - server->data - 1, 0);
       if (ret < 0)
        {
-         strcpy (pop_error, GETLINE_ERROR);
-         strncat (pop_error, strerror (errno),
-                  ERROR_MAX - sizeof (GETLINE_ERROR));
+         snprintf (pop_error, ERROR_MAX, "%s%s",
+                   GETLINE_ERROR, strerror (errno));
          pop_trash (server);
          return (-1);
        }
@@ -1436,9 +1410,7 @@ sendline (popserver server, const char *line)
   if (ret < 0)
     {
       pop_trash (server);
-      strcpy (pop_error, SENDLINE_ERROR);
-      strncat (pop_error, strerror (errno),
-              ERROR_MAX - sizeof (SENDLINE_ERROR));
+      snprintf (pop_error, ERROR_MAX, "%s%s", SENDLINE_ERROR, strerror (errno));
       return (ret);
     }
 
@@ -1500,8 +1472,7 @@ getok (popserver server)
     return (0);
   else if (! strncmp (fromline, "-ERR", 4))
     {
-      strncpy (pop_error, fromline, ERROR_MAX);
-      pop_error[ERROR_MAX-1] = '\0';
+      snprintf (pop_error, ERROR_MAX, "%s", fromline);
       return (-1);
     }
   else