Merge branch 'ci/meson-werror' of https://github.com/t-8ch/util-linux

[thirdparty/util-linux.git] / include / pidfd-utils.h

diff --git a/include/pidfd-utils.h b/include/pidfd-utils.h
index d9e33cbc57ae38c874437a360a5d603f9db9c473..ff0bc4c792fc5e07bcecd4244142c0529eed52f0 100644 (file)
--- a/include/pidfd-utils.h
+++ b/include/pidfd-utils.h
@@ -1,14 +1,33 @@
+/*
+ * No copyright is claimed.  This code is in the public domain; do with
+ * it what you wish.
+ */
 #ifndef UTIL_LINUX_PIDFD_UTILS
 #define UTIL_LINUX_PIDFD_UTILS
 
 #ifdef HAVE_SYS_SYSCALL_H
 # include <sys/syscall.h>
+
+/*
+ * If the kernel headers are too old to provide the syscall numbers, let's
+ * define them ourselves. This can be helpful while cross-compiling.
+ */
+#ifndef __NR_pidfd_send_signal
+#define __NR_pidfd_send_signal 424
+#define SYS_pidfd_send_signal __NR_pidfd_send_signal
+#endif
+#ifndef __NR_pidfd_open
+#define __NR_pidfd_open 434
+#define SYS_pidfd_open __NR_pidfd_open
+#endif
+
 # if defined(SYS_pidfd_send_signal) && defined(SYS_pidfd_open)
 #  ifdef HAVE_SYS_PIDFD_H
 #   include <sys/pidfd.h>
 #  endif
 #  include <sys/types.h>
 #  ifndef HAVE_PIDFD_SEND_SIGNAL
+#   include <sys/wait.h>
 static inline int pidfd_send_signal(int pidfd, int sig, siginfo_t *info,
                                    unsigned int flags)
 {