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39aa7c9d16
suggestions which result in the last revision[*]:
- style(9) and sysexits(3) suggests that we use EX_*
as exit values, instead of some other values like
those returned from a system call as errno.
Additionally, follow Ruslan's suggestion about style(9) and
other style improvements:
- Since open(2) says that it returns -1 on errors,
explicitly determine whether it is returning -1
rather than whether the return value is less than
zero.
- Only set rval when there is no previous error.
This distinguishes the first error that occours.
- Use exit() in favor of return in main(), this is
suggested in old style(9), while the evolve has
fade the suggestion.
- Add some NOTREACHED comments.
- Add blank line after first { because no local variables
in usage()
Thanks to Ruslan for his tireless explaining of the code standards
and knowledge of the history of style(9).
[*] Pointy hat to: me
Submitted by: ru (with some minor changes)
Discussed with: ru, ssouhlal
81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*-
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* Copyright (c) 2000 Paul Saab <ps@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sysexits.h>
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#include <unistd.h>
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int fd;
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int i;
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int rval;
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if (argc < 2) {
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usage();
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/* NOTREACHED */
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}
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rval = EX_OK;
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for (i = 1; i < argc; ++i) {
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if ((fd = open(argv[i], O_RDONLY)) == -1) {
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warn("open %s", argv[i]);
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if (rval == EX_OK)
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rval = EX_NOINPUT;
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continue;
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}
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if (fsync(fd) == -1) {
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warn("fsync %s", argv[i]);
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if (rval == EX_OK)
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rval = EX_OSERR;
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}
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close(fd);
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}
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exit(rval);
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/* NOTREACHED */
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: fsync file ...\n");
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exit(EX_USAGE);
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/* NOTREACHED */
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}
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