2013-02-09 21:54:23 +00:00
|
|
|
.\" Copyright (C) 2006 Red Hat, Inc. All rights reserved.
|
2013-03-12 10:54:09 +00:00
|
|
|
.\" Author: Ulrich Drepper <drepper@redhat.com>
|
2013-02-09 21:54:23 +00:00
|
|
|
.\"
|
2013-03-10 09:29:21 +00:00
|
|
|
.\" %%%LICENSE_START(GPLv2_MISC)
|
2013-02-09 21:54:23 +00:00
|
|
|
.\" This copyrighted material is made available to anyone wishing to use,
|
|
|
|
.\" modify, copy, or redistribute it subject to the terms and conditions of the
|
|
|
|
.\" GNU General Public License v.2.
|
|
|
|
.\"
|
|
|
|
.\" This program is distributed in the hope that it will be useful, but WITHOUT
|
|
|
|
.\" ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
|
|
.\" FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
|
|
.\" more details.
|
|
|
|
.\"
|
getent.1, _syscall.2, acct.2, adjtimex.2, bdflush.2, brk.2, cacheflush.2, getsid.2, getxattr.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, ioperm.2, ipc.2, listxattr.2, mlock.2, modify_ldt.2, mremap.2, nanosleep.2, outb.2, ptrace.2, removexattr.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, setsid.2, setxattr.2, socketcall.2, unimplemented.2, aio_cancel.3, aio_error.3, aio_fsync.3, aio_read.3, aio_return.3, aio_suspend.3, aio_write.3, cfree.3, crypt.3, dlopen.3, errno.3, fenv.3, ftime.3, ftw.3, getgrent_r.3, getpass.3, getpwent_r.3, getutent.3, hsearch.3, lio_listio.3, login.3, longjmp.3, perror.3, printf.3, scandirat.3, setjmp.3, strfmon.3, strtoimax.3, termios.3, ttyname.3, ualarm.3, wcstoimax.3, wordexp.3, console_ioctl.4, dsp56k.4, fd.4, hd.4, intro.4, lp.4, mem.4, null.4, ram.4, rtc.4, sk98lin.4, tty.4, ttyS.4, vcs.4, charmap.5, filesystems.5, ftpusers.5, gai.conf.5, group.5, host.conf.5, hosts.5, intro.5, issue.5, locale.5, motd.5, networks.5, nologin.5, nscd.conf.5, nss.5, nsswitch.conf.5, passwd.5, proc.5, protocols.5, securetty.5, shells.5, termcap.5, ttytype.5, utmp.5, intro.6, armscii-8.7, ascii.7, bootparam.7, cp1251.7, cpuset.7, environ.7, glob.7, intro.7, iso_8859-1.7, iso_8859-10.7, iso_8859-11.7, iso_8859-13.7, iso_8859-14.7, iso_8859-15.7, iso_8859-16.7, iso_8859-2.7, iso_8859-3.7, iso_8859-4.7, iso_8859-5.7, iso_8859-6.7, iso_8859-7.7, iso_8859-8.7, iso_8859-9.7, koi8-r.7, koi8-u.7, posixoptions.7, standards.7, unicode.7, utf-8.7, intro.8, ldconfig.8, nscd.8: Global fix: Update info in source comments on where to get a copy of the GPL
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-10 09:28:43 +00:00
|
|
|
.\" You should have received a copy of the GNU General Public
|
|
|
|
.\" License along with this manual; if not, see
|
|
|
|
.\" <http://www.gnu.org/licenses/>.
|
epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, fallocate.2, futex.2, getcpu.2, getitimer.2, ioctl_list.2, ioprio_set.2, migrate_pages.2, move_pages.2, pciconfig_read.2, sendfile.2, setns.2, signalfd.2, spu_create.2, spu_run.2, sysinfo.2, timerfd_create.2, backtrace.3, cmsg.3, error.3, getpt.3, getrpcent.3, getrpcport.3, getsubopt.3, offsetof.3, program_invocation_name.3, rpc.3, rpmatch.3, rtnetlink.3, xdr.3, cciss.4, hpsa.4, pts.4, charmap.5, dir_colors.5, elf.5, gai.conf.5, locale.5, nscd.conf.5, nss.5, resolv.conf.5, rpc.5, arp.7, cpuset.7, ddp.7, epoll.7, fifo.7, futex.7, icmp.7, ip.7, ipv6.7, mailaddr.7, netdevice.7, packet.7, raw.7, regex.7, rtnetlink.7, socket.7, spufs.7, tcp.7, udp.7, unix.7, x25.7, ldconfig.8, nscd.8: Global fix: s/END_LICENSE/LICENSE_END/
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-12 09:26:07 +00:00
|
|
|
.\" %%%LICENSE_END
|
2013-02-09 21:54:23 +00:00
|
|
|
.\"
|
locale.1, localedef.1, _exit.2, accept.2, access.2, acct.2, adjtimex.2, bdflush.2, bind.2, bpf.2, brk.2, chdir.2, chmod.2, chown.2, chroot.2, clock_nanosleep.2, clone.2, close.2, connect.2, copy_file_range.2, create_module.2, delete_module.2, dup.2, epoll_ctl.2, eventfd.2, execve.2, fallocate.2, fanotify_init.2, fcntl.2, flock.2, fork.2, fsync.2, futex.2, get_kernel_syms.2, getdomainname.2, getgroups.2, gethostname.2, getpagesize.2, getpeername.2, getsid.2, getsockname.2, getsockopt.2, gettimeofday.2, init_module.2, ioctl.2, ioctl_list.2, ioperm.2, iopl.2, kexec_load.2, kill.2, killpg.2, link.2, listen.2, llseek.2, lseek.2, madvise.2, memfd_create.2, mincore.2, mkdir.2, mknod.2, mmap.2, mount.2, nanosleep.2, nice.2, open.2, personality.2, pipe.2, poll.2, posix_fadvise.2, read.2, readahead.2, readlink.2, readv.2, recv.2, recvmmsg.2, rename.2, request_key.2, sched_setaffinity.2, sched_setattr.2, select.2, select_tut.2, semctl.2, semop.2, send.2, sendfile.2, sendmmsg.2, seteuid.2, setns.2, setpgid.2, setreuid.2, shutdown.2, sigaction.2, sigaltstack.2, signal.2, signalfd.2, sigpending.2, sigprocmask.2, sigsuspend.2, socketpair.2, splice.2, stat.2, statfs.2, stime.2, symlink.2, sync.2, syscall.2, syscalls.2, times.2, truncate.2, unlink.2, unshare.2, uselib.2, utimensat.2, vfork.2, vhangup.2, wait.2, wait4.2, write.2, a64l.3, abs.3, acos.3, acosh.3, addseverity.3, adjtime.3, aio_read.3, aio_write.3, asin.3, asinh.3, atan.3, atan2.3, atanh.3, atoi.3, backtrace.3, cbrt.3, ceil.3, cfree.3, clearenv.3, clock_getcpuclockid.3, clog10.3, cmsg.3, copysign.3, cos.3, cosh.3, ctermid.3, ctime.3, daemon.3, dirfd.3, div.3, dl_iterate_phdr.3, drand48.3, drand48_r.3, dysize.3, ecvt.3, ecvt_r.3, endian.3, erf.3, erfc.3, errno.3, exec.3, exp.3, exp2.3, expm1.3, fabs.3, fdim.3, ferror.3, fexecve.3, ffs.3, fgetgrent.3, fgetpwent.3, finite.3, flockfile.3, floor.3, fma.3, fmax.3, fmin.3, fmod.3, fopen.3, fpclassify.3, frexp.3, fseeko.3, fts.3, futimes.3, fwide.3, gamma.3, gcvt.3, getaddrinfo.3, getcwd.3, getdate.3, getdirentries.3, getdtablesize.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getline.3, getloadavg.3, getmntent.3, getnameinfo.3, getnetent_r.3, getpass.3, getprotoent_r.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent_r.3, getservent_r.3, getspnam.3, getsubopt.3, getusershell.3, getutent.3, getw.3, gsignal.3, hypot.3, ilogb.3, inet.3, initgroups.3, insque.3, isalpha.3, isgreater.3, iswblank.3, j0.3, ldexp.3, lgamma.3, lio_listio.3, lockf.3, log.3, log10.3, log1p.3, log2.3, logb.3, lrint.3, lround.3, makedev.3, matherr.3, mbsnrtowcs.3, mkdtemp.3, mkfifo.3, mkstemp.3, mktemp.3, modf.3, mq_close.3, mq_getattr.3, mq_notify.3, mq_receive.3, mq_send.3, nan.3, nextafter.3, on_exit.3, open_memstream.3, opendir.3, perror.3, popen.3, posix_fallocate.3, posix_madvise.3, posix_memalign.3, posix_openpt.3, posix_spawn.3, pow.3, printf.3, profil.3, psignal.3, pthread_attr_setstack.3, pthread_setaffinity_np.3, putenv.3, putpwent.3, qecvt.3, rand.3, random.3, random_r.3, rcmd.3, readdir.3, realpath.3, remainder.3, remquo.3, rexec.3, rint.3, round.3, rpc.3, rpmatch.3, scalb.3, scalbln.3, scandir.3, scanf.3, seekdir.3, sem_wait.3, setbuf.3, setenv.3, setjmp.3, setnetgrent.3, siginterrupt.3, signbit.3, significand.3, sigset.3, sigsetops.3, sigvec.3, sigwait.3, sin.3, sinh.3, sleep.3, sockatmark.3, sqrt.3, statvfs.3, stpcpy.3, stpncpy.3, strdup.3, strerror.3, strftime.3, strlen.3, strnlen.3, strsep.3, strsignal.3, strtod.3, strtok.3, strtol.3, strtoul.3, syslog.3, system.3, tan.3, tanh.3, telldir.3, tempnam.3, termios.3, tgamma.3, timegm.3, timeradd.3, tmpfile.3, tmpnam.3, toascii.3, trunc.3, ttyslot.3, tzset.3, ualarm.3, unlocked_stdio.3, usleep.3, wcpcpy.3, wcpncpy.3, wcscasecmp.3, wcsdup.3, wcsncasecmp.3, wcsnlen.3, wcsnrtombs.3, wprintf.3, y0.3, pts.4, st.4, tty_ioctl.4, elf.5, gai.conf.5, group.5, locale.5, nsswitch.conf.5, proc.5, utmp.5, aio.7, capabilities.7, credentials.7, environ.7, epoll.7, fanotify.7, feature_test_macros.7, inotify.7, ip.7, mq_overview.7, namespaces.7, pipe.7, signal.7, socket.7, standards.7, svipc.7, symlink.7, time.7, unicode.7, unix.7: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2016-03-15 03:46:01 +00:00
|
|
|
.TH GAI.CONF 5 2016-03-15 "Linux" "Linux Programmer's Manual"
|
2013-02-09 21:54:23 +00:00
|
|
|
.SH NAME
|
|
|
|
gai.conf \- getaddrinfo(3) configuration file
|
|
|
|
.SH DESCRIPTION
|
|
|
|
A call to
|
|
|
|
.BR getaddrinfo (3)
|
2013-02-09 22:03:46 +00:00
|
|
|
might return multiple answers.
|
|
|
|
According to RFC\ 3484 these answers must be sorted so that
|
|
|
|
the answer with the highest success rate is first in the list.
|
|
|
|
The RFC provides an algorithm for the sorting.
|
|
|
|
The static rules are not always adequate, though.
|
|
|
|
For this reason,
|
|
|
|
the RFC also requires that system administrators should have the possibility
|
|
|
|
to dynamically change the sorting.
|
|
|
|
For the glibc implementation, this can be achieved with the
|
|
|
|
.IR /etc/gai.conf
|
2013-02-09 21:54:23 +00:00
|
|
|
file.
|
|
|
|
.PP
|
2013-02-09 22:03:46 +00:00
|
|
|
Each line in the configuration file consists of a keyword and its parameters.
|
|
|
|
White spaces in any place are ignored.
|
|
|
|
Lines starting with \(aq#\(aq are comments and are ignored.
|
2013-02-09 21:54:23 +00:00
|
|
|
.PP
|
|
|
|
The keywords currently recognized are:
|
|
|
|
.TP
|
|
|
|
\fBlabel\fR \fInetmask\fR \fIprecedence\fR
|
2013-02-09 22:03:46 +00:00
|
|
|
The value is added to the label table used in the RFC\ 3484 sorting.
|
2015-05-06 16:36:19 +00:00
|
|
|
If any \fBlabel\fR definition is present in the configuration file,
|
|
|
|
the default table is not used.
|
2013-02-09 22:03:46 +00:00
|
|
|
All the label definitions
|
2013-02-09 21:54:23 +00:00
|
|
|
of the default table which are to be maintained have to be duplicated.
|
2013-02-09 22:03:46 +00:00
|
|
|
Following the keyword,
|
2015-05-06 16:36:19 +00:00
|
|
|
the line has to contain a network mask and a precedence value.
|
2013-02-09 21:54:23 +00:00
|
|
|
.TP
|
|
|
|
\fBprecedence\fR \fInetmask\fR \fIprecedence\fR
|
2014-05-11 07:04:13 +00:00
|
|
|
This keyword is similar to \fBlabel\fR, but instead the value is added
|
2013-02-09 22:03:46 +00:00
|
|
|
to the precedence table as specified in RFC\ 3484.
|
|
|
|
Once again, the
|
2013-02-09 21:54:23 +00:00
|
|
|
presence of a single \fBprecedence\fR line in the configuration file
|
|
|
|
causes the default table to not be used.
|
|
|
|
.TP
|
|
|
|
\fBreload\fR <\fByes\fR|\fBno\fR>
|
2013-02-09 22:03:46 +00:00
|
|
|
This keyword controls whether a process checks whether the configuration
|
|
|
|
file has been changed since the last time it was read.
|
|
|
|
If the value is
|
2014-03-26 04:33:40 +00:00
|
|
|
"\fByes\fR", the file is reread.
|
2013-03-10 12:04:00 +00:00
|
|
|
This might cause problems in multithreaded
|
2013-02-09 22:03:46 +00:00
|
|
|
applications and is generally a bad idea.
|
|
|
|
The default is "\fBno\fR".
|
2013-02-09 21:54:23 +00:00
|
|
|
.TP
|
|
|
|
\fBscopev4\fR \fImask\fR \fIvalue\fR
|
2013-02-09 22:03:46 +00:00
|
|
|
Add another rule to the RFC\ 3484 scope table for IPv4 address.
|
|
|
|
By default, the scope IDs described in section 3.2 in RFC\ 3438 are used.
|
2013-02-09 21:54:23 +00:00
|
|
|
Changing these defaults should hardly ever be necessary.
|
2013-02-09 22:03:46 +00:00
|
|
|
.SH FILES
|
|
|
|
\fI/etc/gai.conf\fR
|
2016-02-26 16:26:23 +00:00
|
|
|
.SH VERSIONS
|
|
|
|
The
|
|
|
|
.I gai.conf
|
|
|
|
.\" Added in 2006
|
|
|
|
file is supported by glibc since version 2.5.
|
2013-02-09 21:54:23 +00:00
|
|
|
.SH EXAMPLE
|
2013-02-09 22:03:46 +00:00
|
|
|
The default table according to RFC\ 3484 would be specified with the
|
2013-02-09 21:54:23 +00:00
|
|
|
following configuration file:
|
cpuid.4, fd.4, full.4, initrd.4, lirc.4, msr.4, null.4, vcs.4, charmap.5, core.5, dir_colors.5, filesystems.5, gai.conf.5, hosts.equiv.5, locale.5, motd.5, networks.5, nscd.conf.5, nss.5, proc.5, protocols.5, repertoiremap.5, services.5, tmpfs.5, ttytype.5, intro.8, nscd.8: ffix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2017-08-17 22:59:55 +00:00
|
|
|
.PP
|
2017-08-19 08:56:06 +00:00
|
|
|
.in +4n
|
|
|
|
.EX
|
2013-02-09 21:54:23 +00:00
|
|
|
label ::1/128 0
|
|
|
|
label ::/0 1
|
|
|
|
label 2002::/16 2
|
|
|
|
label ::/96 3
|
|
|
|
label ::ffff:0:0/96 4
|
|
|
|
precedence ::1/128 50
|
|
|
|
precedence ::/0 40
|
|
|
|
precedence 2002::/16 30
|
|
|
|
precedence ::/96 20
|
|
|
|
precedence ::ffff:0:0/96 10
|
2017-08-19 08:56:06 +00:00
|
|
|
.EE
|
|
|
|
.in
|
2013-02-09 22:03:46 +00:00
|
|
|
.\" .SH AUTHOR
|
|
|
|
.\" Ulrich Drepper <drepper@redhat.com>
|
2013-03-05 17:22:04 +00:00
|
|
|
.\"
|
2013-02-09 21:54:23 +00:00
|
|
|
.SH SEE ALSO
|
2014-02-10 07:08:16 +00:00
|
|
|
.BR getaddrinfo (3),
|
2013-02-09 22:03:46 +00:00
|
|
|
RFC\ 3484
|