Commit 52c5223bca7c4e6269488288bc087a4cf94dd283 | zig

author	Jari Vetoniemi <jari.vetoniemi@cloudef.pw> 2026-03-20 04:53:35+09:00
committer	Alex Rønne Petersen <alex@alexrp.com> 2026-05-07 05:45:20+02:00
log	52c5223bca7c4e6269488288bc087a4cf94dd283
tree	a7d515bff67adad86880b26918e5b7f989b8af6a
parent	0ec456c785aa2fe8fa686fd19282a887f3cbe8eb

The linux syscall ppoll modifies its second argument, thus using
`@constCast` here is not correct.

1 files changed, 13 insertions(+), 11 deletions(-)

lib/std/os/linux.zig+13-11

 @@ -1256,21 +1256,23 @@ pub fn munlockall() usize {
 }
 pub fn poll(fds: [*]pollfd, n: nfds_t, timeout: i32) usize {
-    return if (@hasField(SYS, "poll"))
+    if (@hasField(SYS, "poll")) {
-        return syscall3(.poll, @intFromPtr(fds), n, @as(u32, @bitCast(timeout)))
+        return syscall3(.poll, @intFromPtr(fds), n, @as(u32, @bitCast(timeout)));
-    else
+    } else {
-        ppoll(
+        var ts: timespec = if (timeout >= 0)
+            .{
+                .sec = @divTrunc(timeout, 1000),
+                .nsec = @rem(timeout, 1000) * 1000000,
+            }
+        else
+            undefined;
+        return ppoll(
             fds,
             n,
-            if (timeout >= 0)
+            if (timeout >= 0) &ts else null,
-                @constCast(&timespec{
-                    .sec = @divTrunc(timeout, 1000),
-                    .nsec = @rem(timeout, 1000) * 1000000,
-                })
-            else
-                null,
             null,
         );
+    }
 }
 pub fn ppoll(fds: [*]pollfd, n: nfds_t, timeout: ?*timespec, sigmask: ?*const sigset_t) usize {