job make: if stdout is a tty create a pty when running a command.

1 files changed, 8 insertions, 2 deletions

diff --git a/usr.bin/make/job.c b/usr.bin/make/job.c
index 75f7949..179306f 100644
--- a/usr.bin/make/job.c
+++ b/usr.bin/make/job.c
@@ -115,6 +115,7 @@ __FBSDID("$FreeBSD$");
 #include <fcntl.h>
 #include <inttypes.h>
 #include <limits.h>
+#include <libutil.h>
 #include <paths.h>
 #include <string.h>
 #include <signal.h>
@@ -1798,8 +1799,13 @@ JobStart(GNode *gn, int flags, Job *previous)
 		if (usePipes) {
 			int fd[2];
 
-			if (pipe(fd) == -1)
-				Punt("Cannot create pipe: %s", strerror(errno));
+			if (isatty(1)) {
+				if (openpty(fd + 1, fd + 0, NULL, NULL, NULL) == -1)
+					Punt("Cannot open pty: %s", strerror(errno));
+			} else {
+				if (pipe(fd) == -1)
+					Punt("Cannot create pipe: %s", strerror(errno));
+			}
 			job->inPipe = fd[0];
 			job->outPipe = fd[1];
 			fcntl(job->inPipe, F_SETFD, 1);