xpipe: introduce (saves ~170 bytes)

udhcp/signalpipe.c: use pipe instead of socketpair.

2 files changed, 3 insertions, 6 deletions

diff --git a/shell/hush.c b/shell/hush.c
index 800b0f970..2e6f286dc 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1800,8 +1800,7 @@ static int run_pipe_real(struct pipe *pi)
 
                 /* pipes are inserted between pairs of commands */
                 if ((i + 1) < pi->num_progs) {
-                        if (pipe(pipefds) < 0)
-                                bb_perror_msg_and_die("pipe");
+                        pipe(pipefds);
                         nextout = pipefds[1];
                 } else {
                         nextout = 1;
@@ -3134,8 +3133,7 @@ static FILE *generate_stream_from_list(struct pipe *head)
         FILE *pf;
         int pid, channel[2];
 
-        if (pipe(channel) < 0)
-                bb_perror_msg_and_die("pipe");
+        xpipe(channel);
 #if BB_MMU
         pid = fork();
 #else
diff --git a/shell/lash.c b/shell/lash.c
index 24e48c337..28449b791 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -1222,8 +1222,7 @@ static int run_command(struct job *newjob, int inbg, int outpipe[2])
 
                 nextout = 1;
                 if ((i + 1) < newjob->num_progs) {
-                        if (pipe(pipefds) < 0)
-                                bb_perror_msg_and_die("pipe");
+                        xpipe(pipefds);
                         nextout = pipefds[1];
                 } else if (outpipe[1] != -1) {
                         nextout = outpipe[1];