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/* vi: set sw=4 ts=4: */
/*
* Mini fsync implementation for busybox
*
* Copyright (C) 2008 Nokia Corporation. All rights reserved.
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config FSYNC
//config: bool "fsync (3.7 kb)"
//config: default y
//config: help
//config: fsync is used to flush file-related cached blocks to disk.
//applet:IF_FSYNC(APPLET_NOFORK(fsync, fsync, BB_DIR_BIN, BB_SUID_DROP, fsync))
//kbuild:lib-$(CONFIG_FSYNC) += fsync.o
//usage:#define fsync_trivial_usage
//usage: "[-d] FILE..."
//usage:#define fsync_full_usage "\n\n"
//usage: "Write files' buffered blocks to disk\n"
//usage: "\n -d Avoid syncing metadata"
#include "libbb.h"
#ifndef O_NOATIME
# define O_NOATIME 0
#endif
/* This is a NOFORK applet. Be very careful! */
int fsync_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fsync_main(int argc UNUSED_PARAM, char **argv)
{
int status;
int opts;
opts = getopt32(argv, "d"); /* fdatasync */
argv += optind;
if (!*argv) {
bb_show_usage();
}
status = EXIT_SUCCESS;
do {
int fd = open_or_warn(*argv, O_NOATIME | O_NOCTTY | O_RDONLY);
if (fd == -1) {
status = EXIT_FAILURE;
continue;
}
if ((opts ? fdatasync(fd) : fsync(fd))) {
//status = EXIT_FAILURE; - do we want this?
bb_simple_perror_msg(*argv);
}
close(fd);
} while (*++argv);
return status;
}
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