cbaba16b23
r285050 fixed a bug in pw that could lead to /etc/passwd or /etc/group corruption on power loss. However, it fixed it by opening those files with O_SYNC, which is very slow, especially on ZFS. This change replaces O_SYNC with appropriately placed fsync()s instead, which is much faster. Using a ZFS tmpdir, the time to run pw's kyua tests drops from 245s to 35s. Reviewed by: allanjude, bapt, vangyzen, garga Tested on pfSense by: garga MFC after: 4 weeks Sponsored by: Spectra Logic Corp Differential Revision: https://reviews.freebsd.org/D8319
110 lines
2.6 KiB
C
110 lines
2.6 KiB
C
/*-
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* Copyright (C) 1996
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* David L. Nugent. 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 DAVID L. NUGENT 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 DAVID L. NUGENT 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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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <err.h>
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#include <grp.h>
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#include <libutil.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "pwupd.h"
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char *
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getgrpath(const char * file)
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{
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static char pathbuf[MAXPATHLEN];
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snprintf(pathbuf, sizeof pathbuf, "%s/%s", conf.etcpath, file);
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return (pathbuf);
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}
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static int
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gr_update(struct group * grp, char const * group)
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{
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int pfd, tfd;
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struct group *gr = NULL;
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struct group *old_gr = NULL;
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if (grp != NULL)
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gr = gr_dup(grp);
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if (group != NULL)
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old_gr = GETGRNAM(group);
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if (gr_init(conf.etcpath, NULL))
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err(1, "gr_init()");
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if ((pfd = gr_lock()) == -1) {
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gr_fini();
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err(1, "gr_lock()");
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}
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if ((tfd = gr_tmp(-1)) == -1) {
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gr_fini();
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err(1, "gr_tmp()");
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}
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if (gr_copy(pfd, tfd, gr, old_gr) == -1) {
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gr_fini();
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close(tfd);
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err(1, "gr_copy()");
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}
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fsync(tfd);
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close(tfd);
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if (gr_mkdb() == -1) {
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gr_fini();
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err(1, "gr_mkdb()");
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}
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free(gr);
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gr_fini();
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return 0;
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}
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int
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addgrent(struct group * grp)
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{
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return gr_update(grp, NULL);
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}
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int
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chggrent(char const * login, struct group * grp)
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{
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return gr_update(grp, login);
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}
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int
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delgrent(struct group * grp)
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{
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return (gr_update(NULL, grp->gr_name));
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}
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