From 571ec74706cee1ee2ec4ac429eb0969301d6e669 Mon Sep 17 00:00:00 2001
From: Přemysl Janouch <p@janouch.name>
Date: Mon, 9 Dec 2019 19:01:16 +0100
Subject: Guard against ^Z in helper programs
Resume them immediately, we are not a shell.
---
sdn.cpp | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/sdn.cpp b/sdn.cpp
index 8019891..9734a80 100644
--- a/sdn.cpp
+++ b/sdn.cpp
@@ -834,7 +834,11 @@ fun run_program (initializer_list<const char*> list, const string &filename) {
default:
// ...and make sure of it in the parent as well
(void) setpgid (child, child);
- waitpid (child, &status, 0);
+
+ // We don't provide job control--don't let us hang after ^Z
+ while (waitpid (child, &status, WUNTRACED) > -1 && WIFSTOPPED (status))
+ if (WSTOPSIG (status) == SIGTSTP)
+ kill (child, SIGCONT);
tcsetpgrp (STDOUT_FILENO, getpgid (0));
}
--
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