Patch from Theo Markettos: apparently "BSD-derived IP stacks fall over when

[u/mdw/putty] / unix / pty.c

diff --git a/unix/pty.c b/unix/pty.c
index 5d85693..7f46f1a 100644 (file)
--- a/unix/pty.c
+++ b/unix/pty.c
@@ -485,8 +485,8 @@ static void pty_uxsel_setup(void)
  * Also places the canonical host name into `realhost'. It must be
  * freed by the caller.
  */
-static char *pty_init(void *frontend, void **backend_handle, Config *cfg,
-                     char *host, int port, char **realhost, int nodelay)
+static const char *pty_init(void *frontend, void **backend_handle, Config *cfg,
+                           char *host, int port, char **realhost, int nodelay)
 {
     int slavefd;
     pid_t pid, pgrp;
@@ -517,9 +517,10 @@ static char *pty_init(void *frontend, void **backend_handle, Config *cfg,
      * Stamp utmp (that is, tell the utmp helper process to do so),
      * or not.
      */
-    if (!cfg->stamp_utmp)
+    if (!cfg->stamp_utmp) {
        close(pty_utmp_helper_pipe);   /* just let the child process die */
-    else {
+       pty_utmp_helper_pipe = -1;
+    } else {
        char *location = get_x_display(pty_frontend);
        int len = strlen(location)+1, pos = 0;   /* +1 to include NUL */
        while (pos < len) {
@@ -527,6 +528,7 @@ static char *pty_init(void *frontend, void **backend_handle, Config *cfg,
            if (ret < 0) {
                perror("pterm: writing to utmp helper process");
                close(pty_utmp_helper_pipe);   /* arrgh, just give up */
+               pty_utmp_helper_pipe = -1;
                break;
            }
            pos += ret;
@@ -666,7 +668,10 @@ static void pty_close(void)
        close(pty_master_fd);
        pty_master_fd = -1;
     }
-    close(pty_utmp_helper_pipe);       /* this causes utmp to be cleaned up */
+    if (pty_utmp_helper_pipe >= 0) {
+       close(pty_utmp_helper_pipe);   /* this causes utmp to be cleaned up */
+       pty_utmp_helper_pipe = -1;
+    }
 }
 
 /*