hare

commit eded54377ae3132185b51b4dfaf96b5192f4fc77
parent 8b3fae59493b2e2c83ba4a71c6d110861a1f1632
Author: Drew DeVault <sir@cmpwn.com>
Date:   Mon, 11 Apr 2022 17:26:34 +0200

unix::signal: add sigprocmask bits

Signed-off-by: Drew DeVault <sir@cmpwn.com>

Diffstat:
M
rt/+linux/syscalls.ha
 | 
2
+-
M
unix/signal/+linux.ha
 | 
28
+++++++++++++++++++++++++---

2 files changed, 26 insertions(+), 4 deletions(-)
diff --git a/rt/+linux/syscalls.ha b/rt/+linux/syscalls.ha
@@ -510,7 +510,7 @@ export fn signalfd(fd: int, mask: *const sigset, flags: int) (int | errno) = {
 
 export fn sigprocmask(
 	how: int,
-	set: *const sigset,
+	set: nullable *const sigset,
 	old: nullable *sigset
 ) (int | errno) = {
 	return wrap_return(syscall4(SYS_rt_sigprocmask,
diff --git a/unix/signal/+linux.ha b/unix/signal/+linux.ha
@@ -56,11 +56,33 @@ export fn restore(signum: signal, action: *sigaction) void = {
 	};
 };
 
-// Sets the process's signal mask, returning the previous mask.
-export fn procmask(how: how, signals: signal...) sigset = {
+// Adds the given list of signals to the process's current signal mask,
+// returning the old signal mask. This is a convenience function around
+// [[setprocmask]].
+export fn block(signals: signal...) sigset = {
+	let new = newsigset(signals...);
+	return setprocmask(how::BLOCK, &new);
+};
+
+// Removes the given list of signals from the process's current signal mask,
+// returning the old signal mask. This is a convenience function around
+// [[setprocmask]].
+export fn unblock(signals: signal...) sigset = {
 	let new = newsigset(signals...);
+	return setprocmask(how::UNBLOCK, &new);
+};
+
+// Sets the process's signal mask, returning the previous mask.
+export fn setprocmask(how: how, mask: *sigset) sigset = {
+	let old = sigset { ... };
+	rt::sigprocmask(how, mask, &old)!;
+	return old;
+};
+
+// Gets the current process's signal mask.
+export fn getprocmask() sigset = {
 	let old = sigset { ... };
-	rt::sigprocmask(how, &new, &old)!;
+	rt::sigprocmask(how::SETMASK, null, &old)!;
 	return old;
 };