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cf9313e7d1
In bug 14906 the user complains that the inotify support in nscd is not sufficient when it comes to detecting changes in the configurationfiles that should be watched for the various databases. The current nscd implementation uses inotify to watch for changes in the configuration files, but adds watches only for IN_DELETE_SELF and IN_MODIFY. These watches are insufficient to cover even the most basic uses by a system administrator. For example using emacs or vim to edit a configuration file should trigger a reload but it might not if the editors use move to atomically update the file. This atomic update changes the inode and thus removes the notification on the file (as inotify is based on inodes). Thus the inotify support in nscd for configuration files is insufficient to account for the average use cases of system administrators and users. The inotify support is significantly enhanced and described here: https://www.sourceware.org/ml/libc-alpha/2015-02/msg00504.html Tested on x86_64 with and without inotify support.
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/* Initialization in nss_files module.
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Copyright (C) 2011-2015 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifdef USE_NSCD
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#include <string.h>
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#include <nscd/nscd.h>
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#define PWD_FILENAME "/etc/passwd"
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define_traced_file (pwd, PWD_FILENAME);
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#define GRP_FILENAME "/etc/group"
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define_traced_file (grp, GRP_FILENAME);
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#define HST_FILENAME "/etc/hosts"
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define_traced_file (hst, HST_FILENAME);
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#define RESOLV_FILENAME "/etc/resolv.conf"
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define_traced_file (resolv, RESOLV_FILENAME);
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#define SERV_FILENAME "/etc/services"
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define_traced_file (serv, SERV_FILENAME);
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#define NETGR_FILENAME "/etc/netgroup"
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define_traced_file (netgr, NETGR_FILENAME);
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void
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_nss_files_init (void (*cb) (size_t, struct traced_file *))
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{
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init_traced_file (&pwd_traced_file.file, PWD_FILENAME, 0);
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cb (pwddb, &pwd_traced_file.file);
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init_traced_file (&grp_traced_file.file, GRP_FILENAME, 0);
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cb (grpdb, &grp_traced_file.file);
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init_traced_file (&hst_traced_file.file, HST_FILENAME, 0);
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cb (hstdb, &hst_traced_file.file);
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init_traced_file (&resolv_traced_file.file, RESOLV_FILENAME, 1);
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cb (hstdb, &resolv_traced_file.file);
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init_traced_file (&serv_traced_file.file, SERV_FILENAME, 0);
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cb (servdb, &serv_traced_file.file);
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init_traced_file (&netgr_traced_file.file, NETGR_FILENAME, 0);
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cb (netgrdb, &netgr_traced_file.file);
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}
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#endif
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