mirror of
https://https.git.savannah.gnu.org/git/bash.git
synced 2026-06-21 12:57:58 +02:00
Chet Ramey
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
/* sync - sync the disks by forcing pending filesystem writes to complete */
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/*
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Copyright (C) 1999-2009,2022 Free Software Foundation, Inc.
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This file is part of GNU Bash.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include "builtins.h"
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#include "shell.h"
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#include "common.h"
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#include "bashgetopt.h"
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#ifndef errno
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extern int errno;
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#endif
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int
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sync_builtin (WORD_LIST *list)
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{
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int fd, status;
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WORD_LIST *l;
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char *fn;
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if (no_options (list))
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return (EX_USAGE);
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list = loptend;
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if (list == 0)
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{
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sync();
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return (EXECUTION_SUCCESS);
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}
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status = EXECUTION_SUCCESS;
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for (l = list; l; l = l->next)
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{
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fn = l->word->word;
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fd = open (fn, O_WRONLY);
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if (fd < 0)
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fd = open (fn, O_RDONLY);
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if (fd < 0)
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{
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file_error (fn);
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status = EXECUTION_FAILURE;
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continue;
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}
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if (fsync (fd) < 0)
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{
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builtin_error ("%s: cannot sync: %s", fn, strerror (errno));
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status = EXECUTION_FAILURE;
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}
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close (fd);
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}
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return (status);
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}
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char *sync_doc[] = {
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"Sync disks or specified files.",
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"",
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"If one or more FILEs is supplied, force completion of pending writes",
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"to those files. Otherwise, force completion of any pending disk",
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"writes.",
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"",
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"Exit Status: zero unless any FILE could not be synced.",
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(char *)NULL
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};
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struct builtin sync_struct = {
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"sync", /* builtin name */
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sync_builtin, /* function implementing the builtin */
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BUILTIN_ENABLED, /* initial flags for builtin */
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sync_doc, /* array of long documentation strings. */
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"sync [file ...]", /* usage synopsis; becomes short_doc */
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0 /* reserved for internal use */
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};
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