sendmail: fix wrong vfork usage here too

*: shorten error texts

function                                             old     new   delta
launch_helper                                          -     151    +151
vfork_or_die                                          20       -     -20
sendgetmail_main                                    1946    1848     -98
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/1 up/down: 151/-118)           Total: 33 bytes

2 files changed, 6 insertions, 16 deletions

diff --git a/networking/nc.c b/networking/nc.c
index 27c58a8..2fd42d5 100644
--- a/networking/nc.c
+++ b/networking/nc.c
@@ -150,12 +150,9 @@ int nc_main(int argc, char **argv)
 			goto accept_again;
 		}
 		/* child (or main thread if no multiple -l) */
-		if (cfd) {
-			dup2(cfd, 0);
-			close(cfd);
-		}
-		dup2(0, 1);
-		dup2(0, 2);
+		xmove_fd(cfd, 0);
+		xdup2(0, 1);
+		xdup2(0, 2);
 		USE_NC_EXTRA(BB_EXECVP(execparam[0], execparam);)
 		/* Don't print stuff or it will go over the wire.... */
 		_exit(127);
diff --git a/networking/sendmail.c b/networking/sendmail.c
index 1c23ca2..b58055d 100644
--- a/networking/sendmail.c
+++ b/networking/sendmail.c
@@ -120,15 +120,6 @@ static void signal_handler(int signo)
 #undef err
 }
 
-/* libbb candidate */
-static pid_t vfork_or_die(void)
-{
-	pid_t pid = vfork();
-	if (pid < 0)
-		bb_perror_msg_and_die("vfork");
-	return pid;
-}
-
 static void launch_helper(const char **argv)
 {
 	// setup vanilla unidirectional pipes interchange
@@ -137,7 +128,9 @@ static void launch_helper(const char **argv)
 
 	xpipe(pipes);
 	xpipe(pipes+2);
-	helper_pid = vfork_or_die();
+	helper_pid = vfork();
+	if (helper_pid < 0)
+		bb_perror_msg_and_die("vfork");
 	idx = (!helper_pid) * 2;
 	xdup2(pipes[idx], STDIN_FILENO);
 	xdup2(pipes[3-idx], STDOUT_FILENO);