From 64578c0589a3a741f81fb55c16eeb882128da00b Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Wed, 29 Jul 1998 03:08:05 +0000
Subject: merge from the autoconf2 branch to the main branch (This used to be
 commit 3bda7ac417107a7b01d91805ca71c4330657ed21)

---
 source3/tests/fcntl_lock.c | 78 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 source3/tests/fcntl_lock.c

(limited to 'source3/tests/fcntl_lock.c')

diff --git a/source3/tests/fcntl_lock.c b/source3/tests/fcntl_lock.c
new file mode 100644
index 0000000000..c54479434e
--- /dev/null
+++ b/source3/tests/fcntl_lock.c
@@ -0,0 +1,78 @@
+/* test whether fcntl locking works on this system */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#ifdef HAVE_SYS_FCNTL_H
+#include <sys/fcntl.h>
+#endif
+
+#include <errno.h>
+
+static int sys_waitpid(pid_t pid,int *status,int options)
+{
+#ifdef HAVE_WAITPID
+  return waitpid(pid,status,options);
+#else /* USE_WAITPID */
+  return wait4(pid, status, options, NULL);
+#endif /* USE_WAITPID */
+}
+
+#define DATA "conftest.fcntl"
+
+#ifndef SEEK_SET
+#define SEEK_SET 0
+#endif
+
+/* lock a byte range in a open file */
+int main(int argc, char *argv[])
+{
+	struct flock lock;
+	int fd, pid, ret, status=1;
+
+	if (!(pid=fork())) {
+		sleep(2);
+		fd = open(DATA, O_RDONLY);
+
+		if (fd == -1) exit(1);
+
+		lock.l_type = F_WRLCK;
+		lock.l_whence = SEEK_SET;
+		lock.l_start = 0;
+		lock.l_len = 4;
+		lock.l_pid = getpid();
+		
+		lock.l_type = F_WRLCK;
+		
+		/* check if a lock applies */
+		ret = fcntl(fd,F_GETLK,&lock);
+
+		if ((ret == -1) ||
+		    (lock.l_type == F_UNLCK)) {
+			exit(1);
+		} else {
+			exit(0);
+		}
+	}
+
+	fd = open(DATA, O_RDWR|O_CREAT|O_TRUNC, 0600);
+
+	lock.l_type = F_WRLCK;
+	lock.l_whence = SEEK_SET;
+	lock.l_start = 0;
+	lock.l_len = 4;
+	lock.l_pid = getpid();
+
+	/* set a 4 byte write lock */
+	fcntl(fd,F_SETLK,&lock);
+
+	sys_waitpid(pid, &status, 0);
+
+	unlink(DATA);
+
+	exit(status);
+}
-- 
cgit