Portability: need special runes for read() returning EIO under job

  control systems.

1 files changed, 18 insertions, 0 deletions

diff --git a/open.c b/open.c
index bac9f2c..60555b0 100644
--- a/open.c
+++ b/open.c
@@ -43,3 +43,21 @@ extern bool makeblocking(int fd) {
 	}
 	return TRUE;
 }
+
+/* make a file descriptor the same pgrp as us.  Returns TRUE if
+it changes anything. */
+
+extern bool makesamepgrp(int fd) {
+	pid_t grp;
+
+	grp = getpgrp();
+
+	if (tcgetpgrp(fd) == grp)
+		return FALSE;
+
+	if (tcsetpgrp(fd, grp) < 0) {
+		uerror("tcsetgrp");
+		return FALSE;
+	}
+	return TRUE;
+}