Fix race condition in fatal errors for one end closed on two way pipe.

1 files changed, 2 insertions, 0 deletions

diff --git a/awk.h b/awk.h
index c74c6881..86c8883d 100644
--- a/awk.h
+++ b/awk.h
@@ -1501,6 +1501,8 @@ extern struct redirect *redirect(NODE *redir_exp, int redirtype, int *errflg);
 extern NODE *do_close(int nargs);
 extern int flush_io(void);
 extern int close_io(bool *stdio_problem);
+typedef enum { CLOSE_ALL, CLOSE_TO, CLOSE_FROM } two_way_close_type;
+extern int close_rp(struct redirect *rp, two_way_close_type how);
 extern int devopen_simple(const char *name, const char *mode, bool try_real_open);
 extern int devopen(const char *name, const char *mode);
 extern int srcopen(SRCFILE *s);