linux-kernel - [PATCH nolibc 48/61] tools/nolibc/types: add poll() and waitpid() flag definitions

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Message-Id: <20220419004225.3952530-48-paulmck@kernel.org>
Date:   Mon, 18 Apr 2022 17:42:12 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     gwml@...r.gnuweeb.org, kernel-team@...com, w@....eu,
        Willy Tarreau <w@....eu>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: [PATCH nolibc 48/61] tools/nolibc/types: add poll() and waitpid() flag definitions

From: Willy Tarreau <w@....eu>

- POLLIN etc were missing, so poll() could only be used with timeouts.
- WNOHANG was not defined and is convenient to check if a child is still
  running

Signed-off-by: Willy Tarreau <w@....eu>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 tools/include/nolibc/types.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/include/nolibc/types.h b/tools/include/nolibc/types.h
index e4026e740b56..357e60ad38a8 100644
--- a/tools/include/nolibc/types.h
+++ b/tools/include/nolibc/types.h
@@ -82,6 +82,9 @@
 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
 #define WIFEXITED(status)   (((status) & 0x7f) == 0)
 
+/* waitpid() flags */
+#define WNOHANG      1
+
 /* standard exit() codes */
 #define EXIT_SUCCESS 0
 #define EXIT_FAILURE 1
@@ -122,6 +125,13 @@ typedef struct {
 	} while (0)
 
 /* for poll() */
+#define POLLIN          0x0001
+#define POLLPRI         0x0002
+#define POLLOUT         0x0004
+#define POLLERR         0x0008
+#define POLLHUP         0x0010
+#define POLLNVAL        0x0020
+
 struct pollfd {
 	int fd;
 	short int events;
-- 
2.31.1.189.g2e36527f23