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