X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/tripe/blobdiff_plain/b7e1e18b57c30555f65a2548e0f1f186200c0ea8..b9537f3be119d9a099c96bbf9329fcd5b51e5312:/server/tun-slip.c

diff --git a/server/tun-slip.c b/server/tun-slip.c
index 40830f9d..04a58402 100644
--- a/server/tun-slip.c
+++ b/server/tun-slip.c
@@ -258,6 +258,7 @@ static tunnel *t_create(peer *p, int fd, char **ifn)
 {
   slipif *sl = 0;
   int pin[2] = { -1, -1 }, pout[2] = { -1, -1 };
+  mdup_fd md[2];
   pid_t kid = -1;
   dstr d = DSTR_INIT;
   unsigned char ch;
@@ -292,10 +293,10 @@ static tunnel *t_create(peer *p, int fd, char **ifn)
     goto fail;
   }
   if (!kid) {
-    close(pin[1]);
-    close(pout[0]);
-    dup2(pin[0], STDIN_FILENO);
-    dup2(pout[1], STDOUT_FILENO);
+    close(pin[1]); close(pout[0]);
+    md[0].cur = pin[0];  md[0].want = STDIN_FILENO;
+    md[1].cur = pout[0]; md[1].want = STDOUT_FILENO;
+    mdup(md, 2);
     execlp(slipcmd, slipcmd, p_name(p), (char *)0);
     _exit(127);
   }