tools/nolibc: move poll() to poll.h

This is the location regular userspace expects the definition.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250430-poll-v1-1-44b5ceabdeee@linutronix.de
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>

1 files changed, 55 insertions, 0 deletions

diff --git a/tools/include/nolibc/poll.h b/tools/include/nolibc/poll.h
new file mode 100644
index 000000000000..be6e44fe022d
--- /dev/null
+++ b/tools/include/nolibc/poll.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * poll definitions for NOLIBC
+ * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
+ */
+
+/* make sure to include all global symbols */
+#include "nolibc.h"
+
+#ifndef _NOLIBC_POLL_H
+#define _NOLIBC_POLL_H
+
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+
+#include <linux/time.h>
+
+/*
+ * int poll(struct pollfd *fds, int nfds, int timeout);
+ */
+
+static __attribute__((unused))
+int sys_poll(struct pollfd *fds, int nfds, int timeout)
+{
+#if defined(__NR_ppoll)
+	struct timespec t;
+
+	if (timeout >= 0) {
+		t.tv_sec  = timeout / 1000;
+		t.tv_nsec = (timeout % 1000) * 1000000;
+	}
+	return my_syscall5(__NR_ppoll, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
+#elif defined(__NR_ppoll_time64)
+	struct __kernel_timespec t;
+
+	if (timeout >= 0) {
+		t.tv_sec  = timeout / 1000;
+		t.tv_nsec = (timeout % 1000) * 1000000;
+	}
+	return my_syscall5(__NR_ppoll_time64, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
+#elif defined(__NR_poll)
+	return my_syscall3(__NR_poll, fds, nfds, timeout);
+#else
+	return __nolibc_enosys(__func__, fds, nfds, timeout);
+#endif
+}
+
+static __attribute__((unused))
+int poll(struct pollfd *fds, int nfds, int timeout)
+{
+	return __sysret(sys_poll(fds, nfds, timeout));
+}
+
+#endif /* _NOLIBC_POLL_H */