Add fsync(8). This becomes useful with the advent of MAP_NOSYNC etc.

Reviewed by:	peter

3 files changed, 123 insertions, 0 deletions

diff --git a/usr.bin/fsync/Makefile b/usr.bin/fsync/Makefile
new file mode 100644
index 000000000000..23229fed2af3
--- /dev/null
+++ b/usr.bin/fsync/Makefile
@@ -0,0 +1,6 @@
+# $FreeBSD$
+
+PROG=	fsync
+MAN8=	fsync.8
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/fsync/fsync.1 b/usr.bin/fsync/fsync.1
new file mode 100644
index 000000000000..ee193f9fac1b
--- /dev/null
+++ b/usr.bin/fsync/fsync.1
@@ -0,0 +1,55 @@
+.\" Copyright (c) 2000 Paul Saab <ps@FreeBSD.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd June 15, 2000
+.Dt FSYNC 8
+.Os
+.Sh NAME
+.Nm fsync
+.Nd synchronize a file's in-core state with that on disk
+.Sh SYNOPSIS
+.Nm fsync
+.Ar file ...
+.Sh DESCRIPTION
+.Nm Fsync
+causes all modified data and meta-data of
+a file to be written to a permanent storage device.
+.Pp
+.Nm Fync
+utilizes the
+.Xr fync 2
+function call.
+.Sh SEE ALSO
+.Xr fsync 2 ,
+.Xr sync 2 ,
+.Xr update 4 ,
+.Xr halt 8 ,
+.Xr reboot 8
+.Sh HISTORY
+The
+.Nm
+command first appeared in
+.Fx 5.0 .
diff --git a/usr.bin/fsync/fsync.c b/usr.bin/fsync/fsync.c
new file mode 100644
index 000000000000..e9a115fa838c
--- /dev/null
+++ b/usr.bin/fsync/fsync.c
@@ -0,0 +1,62 @@
+/*-
+ * Copyright (c) 2000 Paul Saab <ps@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+void	usage(void);
+
+int
+main(int argc, char *argv[])
+{
+	int fd;
+	int i;
+	
+	if (argc < 2)
+		usage();
+	
+	for (i = 1; i < argc; ++i) {
+		if ((fd = open(argv[i], O_RDONLY)) < 0)
+			err(1, "open %s", argv[i]);
+
+		if (fsync(fd) != 0)
+			err(1, "fsync %s", argv[1]);
+		close(fd);
+	}
+	return(0);
+}
+
+void
+usage()
+{
+	fprintf(stderr, "usaged: fsync file ...\n");
+	exit(EX_USAGE);
+}