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fsync: new applet by Pekka Pessi (Pekka.Pessi AT nokia.com)
function old new delta fsync_main - 128 +128 fdatasync - 39 +39 packed_usage 26596 26622 +26 applet_names 2098 2104 +6 applet_main 1240 1244 +4 applet_nameofs 620 622 +2 applet_install_loc 155 156 +1 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 5/0 up/down: 206/0) Total: 206 bytes Signed-off-by: Alexander Shishkin <virtuoso@slind.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -249,6 +249,12 @@ config FOLD
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help
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Wrap text to fit a specific width.
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config FSYNC
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bool "fsync"
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default n
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help
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fsync is used to flush file-related cached blocks to disk.
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config HEAD
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bool "head"
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default n
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@ -36,6 +36,7 @@ lib-$(CONFIG_EXPR) += expr.o
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lib-$(CONFIG_EXPAND) += expand.o
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lib-$(CONFIG_FALSE) += false.o
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lib-$(CONFIG_FOLD) += fold.o
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lib-$(CONFIG_FSYNC) += fsync.o
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lib-$(CONFIG_HEAD) += head.o
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lib-$(CONFIG_HOSTID) += hostid.o
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lib-$(CONFIG_ID) += id.o
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41
coreutils/fsync.c
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41
coreutils/fsync.c
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@ -0,0 +1,41 @@
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/* 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 tarball for details.
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*/
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#include "libbb.h"
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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 = open3_or_warn(*argv, O_NOATIME | O_NOCTTY | O_RDONLY, 0);
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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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@ -165,6 +165,7 @@ IF_FSCK(APPLET(fsck, _BB_DIR_SBIN, _BB_SUID_NEVER))
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//IF_E2FSCK(APPLET_ODDNAME(fsck.ext2, e2fsck, _BB_DIR_SBIN, _BB_SUID_NEVER, fsck_ext2))
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//IF_E2FSCK(APPLET_ODDNAME(fsck.ext3, e2fsck, _BB_DIR_SBIN, _BB_SUID_NEVER, fsck_ext3))
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IF_FSCK_MINIX(APPLET_ODDNAME(fsck.minix, fsck_minix, _BB_DIR_SBIN, _BB_SUID_NEVER, fsck_minix))
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IF_FSYNC(APPLET_NOFORK(fsync, fsync, _BB_DIR_BIN, _BB_SUID_NEVER, fsync))
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IF_FTPD(APPLET(ftpd, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
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IF_FTPGET(APPLET_ODDNAME(ftpget, ftpgetput, _BB_DIR_USR_BIN, _BB_SUID_NEVER, ftpget))
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IF_FTPPUT(APPLET_ODDNAME(ftpput, ftpgetput, _BB_DIR_USR_BIN, _BB_SUID_NEVER, ftpput))
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@ -4209,7 +4209,14 @@
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#define sync_trivial_usage \
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""
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#define sync_full_usage "\n\n" \
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"Write all buffered filesystem blocks to disk"
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"Write all buffered blocks to disk"
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#define fsync_trivial_usage \
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"[OPTION]... FILE..."
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#define fsync_full_usage \
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"Write files' buffered blocks to disk\n" \
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"\nOptions:" \
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"\n -d Avoid syncing metadata"
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#define sysctl_trivial_usage \
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"[OPTIONS]... [VALUE]..."
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