Connect std{in,out,err} to *something* so that "hooks" scripts that write

to std{err,out} will not spam /etc/resolv.conf.

Ted Lemon fixed the problem in version 3 of the client, but only for the
pre-daemonized case.  Thanks to Brian for pointing that out and helping
to make our future dhclient (v3) better.

Submitted by:	brian

1 files changed, 7 insertions, 0 deletions

diff --git a/contrib/isc-dhcp/client/dhclient.c b/contrib/isc-dhcp/client/dhclient.c
index 69424a8..a84acb3 100644
--- a/contrib/isc-dhcp/client/dhclient.c
+++ b/contrib/isc-dhcp/client/dhclient.c
@@ -2121,6 +2121,13 @@ int script_go (ip)
 			wstatus = 0;
 		}
 	} else {
+		if ((i = open(_PATH_DEVNULL, O_RDWR)) != -1) {
+			dup2(i, STDIN_FILENO);
+			dup2(i, STDOUT_FILENO);
+			dup2(i, STDERR_FILENO);
+			if (i > STDERR_FILENO)
+				close(i);
+		}
 		execve (scriptName, argv, envp);
 		error ("execve (%s, ...): %m", scriptName);
 		exit (0);