I've just discovered that using the saved sessions menu from Unix

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

diff --git a/unix/uxpty.c b/unix/uxpty.c
index 50e5371..e47f798 100644 (file)
--- a/unix/uxpty.c
+++ b/unix/uxpty.c
@@ -275,8 +275,10 @@ static void fatal_sig_handler(int signum)
 
 static int pty_open_slave(Pty pty)
 {
-    if (pty->slave_fd < 0)
+    if (pty->slave_fd < 0) {
        pty->slave_fd = open(pty->name, O_RDWR);
+        fcntl(pty->slave_fd, F_SETFD, FD_CLOEXEC);
+    }
 
     return pty->slave_fd;
 }
@@ -307,6 +309,8 @@ static void pty_open_master(Pty pty)
                    strcpy(pty->name, master_name);
                    pty->name[5] = 't'; /* /dev/ptyXX -> /dev/ttyXX */
 
+                    fcntl(pty->master_fd, F_SETFD, FD_CLOEXEC);
+
                    if (pty_open_slave(pty) >= 0 &&
                        access(pty->name, R_OK | W_OK) == 0)
                        goto got_one;
@@ -346,6 +350,8 @@ static void pty_open_master(Pty pty)
        exit(1);
     }
 
+    fcntl(pty->master_fd, F_SETFD, FD_CLOEXEC);
+
     pty->name[FILENAME_MAX-1] = '\0';
     strncpy(pty->name, ptsname(pty->master_fd), FILENAME_MAX-1);
 #endif