driver: Avoid pipe2 for now, it is not yet standardized

pipe2 is accepted for the next POSIX, but this is not yet released,
and some platforms (in particular macOS) do not yet support it.

1 files changed, 9 insertions, 3 deletions

diff --git a/driver.c b/driver.c
index 3f5ee1e..b274365 100644
--- a/driver.c
+++ b/driver.c
@@ -17,8 +17,6 @@
 
 #include "util.h"
 
-extern int pipe2(int[2], int);
-
 enum phaseid {
 	PREPROCESS = 1,
 	COMPILE,
@@ -149,10 +147,18 @@ spawnphase(struct phase *phase, int *fd, char *input, char *output, bool last)
 	if (*fd != -1)
 		ret = posix_spawn_file_actions_adddup2(&actions, *fd, 0);
 	if (!last) {
-		if (pipe2(pipefd, O_CLOEXEC) < 0) {
+		if (pipe(pipefd) < 0) {
 			ret = errno;
 			goto err1;
 		}
+		if (fcntl(pipefd[0], F_SETFD, FD_CLOEXEC) < 0) {
+			ret = errno;
+			goto err2;
+		}
+		if (fcntl(pipefd[1], F_SETFD, FD_CLOEXEC) < 0) {
+			ret = errno;
+			goto err2;
+		}
 		ret = posix_spawn_file_actions_adddup2(&actions, pipefd[1], 1);
 		if (ret)
 			goto err2;