2004-11-03 13:51:07 +00:00
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'\" t
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|
.\" This man page is Copyright (C) 1999 Andi Kleen <ak@muc.de>.
|
ldd.1, capget.2, clone.2, create_module.2, fallocate.2, futex.2, get_kernel_syms.2, get_thread_area.2, getcpu.2, getitimer.2, getpid.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl_list.2, mkdir.2, mknod.2, pciconfig_read.2, pivot_root.2, posix_fadvise.2, query_module.2, sendfile.2, set_thread_area.2, setns.2, unshare.2, __setfpucw.3, a64l.3, addseverity.3, argz_add.3, bindresvport.3, cabs.3, cacos.3, cacosh.3, canonicalize_file_name.3, carg.3, casin.3, casinh.3, catan.3, catanh.3, ccos.3, ccosh.3, cerf.3, cexp.3, cexp2.3, cimag.3, clog.3, clog10.3, clog2.3, cmsg.3, conj.3, cpow.3, cproj.3, creal.3, csin.3, csinh.3, csqrt.3, ctan.3, ctanh.3, des_crypt.3, envz_add.3, fdim.3, fma.3, fmax.3, fmemopen.3, fmin.3, fmtmsg.3, fpclassify.3, gamma.3, getpt.3, getrpcent.3, getrpcport.3, getttyent.3, isgreater.3, key_setsecret.3, lgamma.3, malloc_hook.3, mempcpy.3, nan.3, netlink.3, nextafter.3, putgrent.3, remove.3, remquo.3, rpc.3, rtime.3, rtnetlink.3, setaliasent.3, setnetgrent.3, signbit.3, significand.3, sincos.3, stdin.3, tgamma.3, xcrypt.3, xdr.3, cciss.4, hpsa.4, mouse.4, pts.4, sk98lin.4, tty_ioctl.4, wavelan.4, hosts.equiv.5, rpc.5, tzfile.5, boot.7, complex.7, ddp.7, fifo.7, futex.7, icmp.7, ip.7, ipv6.7, netdevice.7, netlink.7, packet.7, raw.7, rtnetlink.7, socket.7, tcp.7, udp.7, unix.7, x25.7, sync.8: Global fix: Put copyright info at top of page, followed by blank line and LICENSE
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-10 09:29:51 +00:00
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.\"
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getcpu.2, sendfile.2, cmsg.3, rtnetlink.3, arp.7, ddp.7, fifo.7, icmp.7, ip.7, ipv6.7, netdevice.7, packet.7, raw.7, rtnetlink.7, socket.7, tcp.7, udp.7, unix.7, x25.7: LICENSE_START(VERBATIM_ONE_PARA)
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-10 09:29:00 +00:00
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.\" %%%LICENSE_START(VERBATIM_ONE_PARA)
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2004-11-03 13:51:07 +00:00
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.\" Permission is granted to distribute possibly modified copies
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.\" of this page provided the header is included verbatim,
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.\" and in case of nontrivial modification author and date
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.\" of the modification is added to the header.
|
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
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|
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.\" %%%LICENSE_END
|
networks.5, arp.7, cp1251.7, ddp.7, icmp.7, ip.7, ipv6.7, iso_8859-10.7, iso_8859-13.7, iso_8859-14.7, iso_8859-15.7, iso_8859-3.7, iso_8859-4.7, iso_8859-5.7, iso_8859-6.7, iso_8859-7.7, iso_8859-9.7, koi8-r.7, netdevice.7, netlink.7, packet.7, raw.7, rtnetlink.7, udp.7, x25.7, ld.so.8, sln.8, sync.8: srcfix
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-12 11:28:50 +00:00
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.\"
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2004-11-03 13:51:07 +00:00
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.\" $Id: netdevice.7,v 1.10 2000/08/17 10:09:54 ak Exp $
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2004-11-25 08:11:36 +00:00
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.\"
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.\" Modified, 2004-11-25, mtk, formatting and a few wording fixes
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.\"
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2012-04-22 20:29:44 +00:00
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.\" Modified, 2011-11-02, <bidulock@openss7.org>, added many basic
|
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.\" but missing ioctls, such as SIOCGIFADDR.
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.\"
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2014-01-24 11:05:49 +00:00
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.TH NETDEVICE 7 2014-01-24 "Linux" "Linux Programmer's Manual"
|
2004-11-03 13:51:07 +00:00
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.SH NAME
|
2012-10-21 06:14:32 +00:00
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netdevice \- low-level access to Linux network devices
|
2004-11-03 13:51:07 +00:00
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.SH SYNOPSIS
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.B "#include <sys/ioctl.h>"
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.br
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.B "#include <net/if.h>"
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.SH DESCRIPTION
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This man page describes the sockets interface which is used to configure
|
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network devices.
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2007-04-12 22:42:49 +00:00
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Linux supports some standard ioctls to configure network devices.
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They can be used on any socket's file descriptor regardless of the
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family or type.
|
2014-01-09 23:30:18 +00:00
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Most of them pass an
|
2007-06-23 07:56:56 +00:00
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.I ifreq
|
2004-11-03 13:51:07 +00:00
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|
|
structure:
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|
2007-12-19 06:16:04 +00:00
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.in +4n
|
2004-11-03 13:51:07 +00:00
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|
.nf
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struct ifreq {
|
2004-11-25 08:11:36 +00:00
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char ifr_name[IFNAMSIZ]; /* Interface name */
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union {
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|
struct sockaddr ifr_addr;
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|
struct sockaddr ifr_dstaddr;
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struct sockaddr ifr_broadaddr;
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struct sockaddr ifr_netmask;
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struct sockaddr ifr_hwaddr;
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|
short ifr_flags;
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int ifr_ifindex;
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int ifr_metric;
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|
int ifr_mtu;
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|
struct ifmap ifr_map;
|
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|
char ifr_slave[IFNAMSIZ];
|
|
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|
char ifr_newname[IFNAMSIZ];
|
2007-12-23 08:23:31 +00:00
|
|
|
char *ifr_data;
|
2004-11-25 08:11:36 +00:00
|
|
|
};
|
2004-11-03 13:51:07 +00:00
|
|
|
};
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|
.fi
|
2007-12-19 06:16:04 +00:00
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|
.in
|
2004-11-03 13:51:07 +00:00
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|
Normally, the user specifies which device to affect by setting
|
2007-06-23 07:56:56 +00:00
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.I ifr_name
|
2007-04-12 22:42:49 +00:00
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to the name of the interface.
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|
All other members of the structure may
|
|
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|
share memory.
|
2007-05-19 04:30:20 +00:00
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|
|
.SS Ioctls
|
2014-01-10 17:21:00 +00:00
|
|
|
If an ioctl is marked as privileged, then using it requires an effective
|
2005-07-18 16:02:32 +00:00
|
|
|
user ID of 0 or the
|
2004-11-03 13:51:07 +00:00
|
|
|
.B CAP_NET_ADMIN
|
2007-04-12 22:42:49 +00:00
|
|
|
capability.
|
2014-03-26 05:00:35 +00:00
|
|
|
If this is not the case,
|
2004-11-03 13:51:07 +00:00
|
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|
.B EPERM
|
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|
will be returned.
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|
.TP
|
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|
.B SIOCGIFNAME
|
|
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|
Given the
|
2007-06-23 07:56:56 +00:00
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|
.IR ifr_ifindex ,
|
2004-11-03 13:51:07 +00:00
|
|
|
return the name of the interface in
|
2007-06-23 07:56:56 +00:00
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|
|
.IR ifr_name .
|
2004-11-03 13:51:07 +00:00
|
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|
This is the only ioctl which returns its result in
|
2007-06-23 07:56:56 +00:00
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|
|
.IR ifr_name .
|
2004-11-03 13:51:07 +00:00
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|
.TP
|
|
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|
.B SIOCGIFINDEX
|
|
|
|
Retrieve the interface index of the interface into
|
2007-06-23 07:56:56 +00:00
|
|
|
.IR ifr_ifindex .
|
2004-11-03 13:51:07 +00:00
|
|
|
.TP
|
|
|
|
.BR SIOCGIFFLAGS ", " SIOCSIFFLAGS
|
|
|
|
Get or set the active flag word of the device.
|
2007-06-23 07:56:56 +00:00
|
|
|
.I ifr_flags
|
2007-07-01 04:23:34 +00:00
|
|
|
contains a bit mask of the following values:
|
2012-05-29 15:51:28 +00:00
|
|
|
.\" Do not right adjust text blocks in tables
|
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|
|
.na
|
2004-11-03 13:51:07 +00:00
|
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|
.TS
|
|
|
|
tab(:);
|
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|
|
c s
|
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|
l l.
|
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|
Device flags
|
|
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|
IFF_UP:Interface is running.
|
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|
IFF_BROADCAST:Valid broadcast address set.
|
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|
|
IFF_DEBUG:Internal debugging flag.
|
|
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|
IFF_LOOPBACK:Interface is a loopback interface.
|
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|
IFF_POINTOPOINT:Interface is a point-to-point link.
|
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|
IFF_RUNNING:Resources allocated.
|
2012-05-29 15:51:28 +00:00
|
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|
IFF_NOARP:T{
|
|
|
|
No arp protocol, L2 destination address not set.
|
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|
T}
|
2004-11-03 13:51:07 +00:00
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IFF_PROMISC:Interface is in promiscuous mode.
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IFF_NOTRAILERS:Avoid use of trailers.
|
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IFF_ALLMULTI:Receive all multicast packets.
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IFF_MASTER:Master of a load balancing bundle.
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IFF_SLAVE:Slave of a load balancing bundle.
|
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IFF_MULTICAST:Supports multicast
|
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|
IFF_PORTSEL:Is able to select media type via ifmap.
|
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|
IFF_AUTOMEDIA:Auto media selection active.
|
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|
IFF_DYNAMIC:T{
|
|
|
|
The addresses are lost when the interface goes down.
|
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|
T}
|
2009-01-13 04:35:42 +00:00
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|
IFF_LOWER_UP:Driver signals L1 up (since Linux 2.6.17)
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IFF_DORMANT:Driver signals dormant (since Linux 2.6.17)
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IFF_ECHO:Echo sent packets (since Linux 2.6.25)
|
|
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|
2007-04-12 22:42:49 +00:00
|
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.TE
|
2012-05-29 15:51:28 +00:00
|
|
|
.ad
|
2004-11-03 13:51:07 +00:00
|
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|
Setting the active flag word is a privileged operation, but any
|
|
|
|
process may read it.
|
|
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|
.TP
|
2012-04-22 20:29:44 +00:00
|
|
|
.BR SIOCGIFPFLAGS ", " SIOCSIFPFLAGS
|
|
|
|
Get or set extended (private) flags for the device.
|
|
|
|
.I ifr_flags
|
|
|
|
contains a bit mask of the following values:
|
|
|
|
.TS
|
|
|
|
tab(:);
|
|
|
|
c s
|
|
|
|
l l.
|
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|
Private flags
|
|
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|
IFF_802_1Q_VLAN:Interface is 802.1Q VLAN device.
|
|
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|
IFF_EBRIDGE:Interface is Ethernet bridging device.
|
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IFF_SLAVE_INACTIVE:Interface is inactive bonding slave.
|
|
|
|
IFF_MASTER_8023AD:Interface is 802.3ad bonding master.
|
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|
IFF_MASTER_ALB:Interface is balanced-alb bonding master.
|
|
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|
IFF_BONDING:Interface is a bonding master or slave.
|
|
|
|
IFF_SLAVE_NEEDARP:Interface needs ARPs for validation.
|
|
|
|
IFF_ISATAP:Interface is RFC4214 ISATAP interface.
|
|
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|
.TE
|
|
|
|
.sp
|
|
|
|
Setting the extended (private) interface flags is a privileged operation.
|
|
|
|
.TP
|
|
|
|
.BR SIOCGIFADDR ", " SIOCSIFADDR
|
|
|
|
Get or set the address of the device using
|
|
|
|
.IR ifr_addr .
|
|
|
|
Setting the interface address is a privileged operation.
|
|
|
|
For compatibility, only
|
|
|
|
.B AF_INET
|
|
|
|
addresses are accepted or returned.
|
|
|
|
.TP
|
|
|
|
.BR SIOCGIFDSTADDR ", " SIOCSIFDSTADDR
|
|
|
|
Get or set the destination address of a point-to-point device using
|
|
|
|
.IR ifr_dstaddr .
|
|
|
|
For compatibility, only
|
|
|
|
.B AF_INET
|
|
|
|
addresses are accepted or returned.
|
|
|
|
Setting the destination address is a privileged operation.
|
|
|
|
.TP
|
|
|
|
.BR SIOCGIFBRDADDR ", " SIOCSIFBRDADDR
|
|
|
|
Get or set the broadcast address for a device using
|
|
|
|
.IR ifr_brdaddr .
|
|
|
|
For compatibility, only
|
|
|
|
.B AF_INET
|
|
|
|
addresses are accepted or returned.
|
|
|
|
Setting the broadcast address is a privileged operation.
|
|
|
|
.TP
|
|
|
|
.BR SIOCGIFNETMASK ", " SIOCSIFNETMASK
|
|
|
|
Get or set the network mask for a device using
|
|
|
|
.IR ifr_netmask .
|
|
|
|
For compatibility, only
|
|
|
|
.B AF_INET
|
|
|
|
addresses are accepted or returned.
|
|
|
|
Setting the network mask is a privileged operation.
|
|
|
|
.TP
|
2004-11-03 13:51:07 +00:00
|
|
|
.BR SIOCGIFMETRIC ", " SIOCSIFMETRIC
|
|
|
|
Get or set the metric of the device using
|
2007-06-23 07:56:56 +00:00
|
|
|
.IR ifr_metric .
|
2004-11-03 13:51:07 +00:00
|
|
|
This is currently not implemented; it sets
|
2007-06-23 07:56:56 +00:00
|
|
|
.I ifr_metric
|
2004-11-03 13:51:07 +00:00
|
|
|
to 0 if you attempt to read it and returns
|
|
|
|
.B EOPNOTSUPP
|
|
|
|
if you attempt to set it.
|
|
|
|
.TP
|
|
|
|
.BR SIOCGIFMTU ", " SIOCSIFMTU
|
|
|
|
Get or set the MTU (Maximum Transfer Unit) of a device using
|
2007-06-23 07:56:56 +00:00
|
|
|
.IR ifr_mtu .
|
2007-04-12 22:42:49 +00:00
|
|
|
Setting the MTU is a privileged operation.
|
|
|
|
Setting the MTU to
|
2004-11-03 13:51:07 +00:00
|
|
|
too small values may cause kernel crashes.
|
|
|
|
.TP
|
|
|
|
.BR SIOCGIFHWADDR ", " SIOCSIFHWADDR
|
|
|
|
Get or set the hardware address of a device using
|
2007-06-23 07:56:56 +00:00
|
|
|
.IR ifr_hwaddr .
|
2004-11-03 13:51:07 +00:00
|
|
|
The hardware address is specified in a struct
|
|
|
|
.IR sockaddr .
|
2007-04-12 22:42:49 +00:00
|
|
|
.I sa_family
|
|
|
|
contains the ARPHRD_* device type,
|
2004-11-03 13:51:07 +00:00
|
|
|
.I sa_data
|
2007-04-12 22:42:49 +00:00
|
|
|
the L2 hardware address starting from byte 0.
|
2004-11-03 13:51:07 +00:00
|
|
|
Setting the hardware address is a privileged operation.
|
|
|
|
.TP
|
|
|
|
.B SIOCSIFHWBROADCAST
|
|
|
|
Set the hardware broadcast address of a device from
|
2007-06-23 07:56:56 +00:00
|
|
|
.IR ifr_hwaddr .
|
2004-11-03 13:51:07 +00:00
|
|
|
This is a privileged operation.
|
|
|
|
.TP
|
|
|
|
.BR SIOCGIFMAP ", " SIOCSIFMAP
|
|
|
|
Get or set the interface's hardware parameters using
|
2007-06-23 07:56:56 +00:00
|
|
|
.IR ifr_map .
|
2004-11-03 13:51:07 +00:00
|
|
|
Setting the parameters is a privileged operation.
|
|
|
|
|
2007-12-30 05:59:36 +00:00
|
|
|
.in +4n
|
2004-11-03 13:51:07 +00:00
|
|
|
.nf
|
2006-01-03 10:58:34 +00:00
|
|
|
struct ifmap {
|
2004-11-25 08:11:36 +00:00
|
|
|
unsigned long mem_start;
|
|
|
|
unsigned long mem_end;
|
2007-04-12 22:42:49 +00:00
|
|
|
unsigned short base_addr;
|
|
|
|
unsigned char irq;
|
|
|
|
unsigned char dma;
|
|
|
|
unsigned char port;
|
2004-11-03 13:51:07 +00:00
|
|
|
};
|
|
|
|
.fi
|
2007-12-30 05:59:36 +00:00
|
|
|
.in
|
2004-11-03 13:51:07 +00:00
|
|
|
|
|
|
|
The interpretation of the ifmap structure depends on the device driver
|
|
|
|
and the architecture.
|
|
|
|
.TP
|
|
|
|
.BR SIOCADDMULTI ", " SIOCDELMULTI
|
|
|
|
Add an address to or delete an address from the device's link layer
|
|
|
|
multicast filters using
|
2007-06-23 07:56:56 +00:00
|
|
|
.IR ifr_hwaddr .
|
2004-11-03 13:51:07 +00:00
|
|
|
These are privileged operations.
|
|
|
|
See also
|
|
|
|
.BR packet (7)
|
|
|
|
for an alternative.
|
|
|
|
.TP
|
|
|
|
.BR SIOCGIFTXQLEN ", " SIOCSIFTXQLEN
|
|
|
|
Get or set the transmit queue length of a device using
|
2007-06-23 07:56:56 +00:00
|
|
|
.IR ifr_qlen .
|
2004-11-03 13:51:07 +00:00
|
|
|
Setting the transmit queue length is a privileged operation.
|
|
|
|
.TP
|
|
|
|
.B SIOCSIFNAME
|
2007-04-12 22:42:49 +00:00
|
|
|
Changes the name of the interface specified in
|
2007-09-20 16:26:31 +00:00
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.I ifr_name
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2004-11-03 13:51:07 +00:00
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to
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2007-06-23 07:56:56 +00:00
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.IR ifr_newname .
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2007-04-12 22:42:49 +00:00
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This is a privileged operation.
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intro.1, _syscall.2, access.2, arch_prctl.2, cacheflush.2, chown.2, clock_getres.2, clone.2, create_module.2, fcntl.2, flock.2, get_kernel_syms.2, get_robust_list.2, get_thread_area.2, getcpu.2, getpriority.2, getrlimit.2, getrusage.2, ioprio_set.2, kexec_load.2, madvise.2, mbind.2, migrate_pages.2, mknod.2, mmap.2, mount.2, move_pages.2, mprotect.2, open.2, pause.2, pciconfig_read.2, perf_event_open.2, prctl.2, ptrace.2, query_module.2, read.2, reboot.2, recv.2, s390_runtime_instr.2, sched_setscheduler.2, select_tut.2, send.2, set_mempolicy.2, setfsgid.2, setfsuid.2, sigaction.2, spu_create.2, spu_run.2, stime.2, swapon.2, syslog.2, timer_create.2, timer_getoverrun.2, times.2, tkill.2, umount.2, unimplemented.2, ustat.2, vm86.2, wait.2, abs.3, aio_read.3, aio_write.3, bsd_signal.3, catgets.3, clearenv.3, cmsg.3, dbopen.3, dirfd.3, dlopen.3, exec.3, fenv.3, ferror.3, fmemopen.3, fnmatch.3, fopen.3, futimes.3, getaddrinfo.3, getifaddrs.3, getipnodebyname.3, hsearch.3, if_nameindex.3, inet_pton.3, mblen.3, mbrlen.3, mbsrtowcs.3, mbtowc.3, mcheck.3, memfrob.3, mq_notify.3, netlink.3, posix_memalign.3, printf.3, pthread_attr_setscope.3, pthread_cleanup_push.3, pthread_kill_other_threads_np.3, pthread_self.3, pthread_setcancelstate.3, pthread_setconcurrency.3, raise.3, resolver.3, rpc.3, rtime.3, rtnetlink.3, scanf.3, setbuf.3, setnetgrent.3, shm_open.3, sigpause.3, sigset.3, sigwait.3, sockatmark.3, strcasecmp.3, strcmp.3, strdup.3, strftime.3, strptime.3, strsignal.3, strverscmp.3, sysv_signal.3, termios.3, wcrtomb.3, wcsnlen.3, wcsnrtombs.3, wcsrtombs.3, wctomb.3, wprintf.3, console_codes.4, cpuid.4, msr.4, rtc.4, sk98lin.4, st.4, tty.4, charmap.5, core.5, elf.5, hosts.equiv.5, proc.5, resolv.conf.5, services.5, slabinfo.5, arp.7, bootparam.7, capabilities.7, charsets.7, cpuset.7, ddp.7, epoll.7, feature_test_macros.7, futex.7, hier.7, icmp.7, inotify.7, ip.7, ipv6.7, man-pages.7, mdoc.7, mdoc.samples.7, netdevice.7, netlink.7, numa.7, packet.7, path_resolution.7, posixoptions.7, pthreads.7, raw.7, rtld-audit.7, rtnetlink.7, sem_overview.7, sigevent.7, socket.7, spufs.7, tcp.7, udp.7, unicode.7, uri.7, utf-8.7, intro.8, ldconfig.8, sync.8: Global fix: fix placement of word "only"
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-31 08:53:00 +00:00
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It is allowed only when the interface
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2004-11-03 13:51:07 +00:00
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is not up.
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.TP
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.B SIOCGIFCONF
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2007-04-12 22:42:49 +00:00
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Return a list of interface (transport layer) addresses.
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This currently
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2007-06-22 20:40:07 +00:00
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means only addresses of the
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.B AF_INET
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(IPv4) family for compatibility.
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2014-01-09 23:30:18 +00:00
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Unlike the others, this ioctl passes an
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2007-06-23 07:56:56 +00:00
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.I ifconf
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2014-01-09 23:30:18 +00:00
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structure:
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.in +4n
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.nf
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struct ifconf {
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int ifc_len; /* size of buffer */
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union {
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char *ifc_buf; /* buffer address */
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struct ifreq *ifc_req; /* array of structures */
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};
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};
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.fi
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.in
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If
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2007-06-23 07:56:56 +00:00
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.I ifc_req
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2014-01-09 23:30:18 +00:00
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is NULL,
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.B SIOCGIFCONF
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returns the necessary buffer size in bytes
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for receiving all available addresses in
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2007-06-23 07:56:56 +00:00
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.IR ifc_len .
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time.1, get_kernel_syms.2, getitimer.2, open.2, perf_event_open.2, wait.2, alloca.3, bcmp.3, catopen.3, fputwc.3, iconv.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, mbsinit.3, putwchar.3, rcmd.3, rexec.3, sigqueue.3, strverscmp.3, wctrans.3, wctype.3, wcwidth.3, console_codes.4, initrd.4, st.4, elf.5, nss.5, ip.7, netdevice.7, path_resolution.7, socket.7, udp.7, ld.so.8: grfix: s/Otherwise /Otherwise, /
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2014-04-28 08:15:47 +00:00
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Otherwise,
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2014-01-09 23:30:18 +00:00
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.I ifc_req
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contains a pointer to an array of
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.I ifreq
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structures to be filled with all currently active L3 interface addresses.
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.I ifc_len
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contains the size of the array in bytes.
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Within each
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.I ifreq
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structure,
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2007-04-12 22:42:49 +00:00
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.I ifr_name
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2014-01-09 23:30:18 +00:00
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will receive the interface name, and
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2004-11-03 13:51:07 +00:00
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.I ifr_addr
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the address.
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2014-01-09 23:30:18 +00:00
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The actual number of bytes transferred is returned in
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2004-11-03 13:51:07 +00:00
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.IR ifc_len .
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2014-01-09 23:30:18 +00:00
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If the size specified by
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.I ifc_len
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is insufficient to store all the addresses,
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the kernel will skip the exceeding ones and return success.
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There is no reliable way of detecting this condition once it has occurred.
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It is therefore recommended to either determine the necessary buffer size
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beforehand by calling
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.B SIOCGIFCONF
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with
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.I ifc_req
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set to NULL, or to retry the call with a bigger buffer whenever
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2004-11-03 13:51:07 +00:00
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.I ifc_len
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2014-02-01 22:37:36 +00:00
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upon return differs by less than
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.I sizeof(struct ifreq)
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2014-01-09 23:30:18 +00:00
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from its original value.
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If an error occurs accessing the
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.I ifconf
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or
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.I ifreq
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structures,
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.B EFAULT
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will be returned.
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2007-06-13 21:48:16 +00:00
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.\" Slaving isn't supported in 2.2
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2006-03-05 20:51:13 +00:00
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.\" .
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2004-11-03 13:51:07 +00:00
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.\" .TP
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.\" .BR SIOCGIFSLAVE ", " SIOCSIFSLAVE
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.\" Get or set the slave device using
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2007-06-23 07:56:56 +00:00
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.\" .IR ifr_slave .
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2004-11-03 13:51:07 +00:00
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.\" Setting the slave device is a privileged operation.
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.\" .PP
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adjtimex.2, bind.2, cacheflush.2, clone.2, fallocate.2, fanotify_init.2, fanotify_mark.2, flock.2, futex.2, getdents.2, getpriority.2, getrlimit.2, gettid.2, gettimeofday.2, ioprio_set.2, kexec_load.2, migrate_pages.2, modify_ldt.2, mount.2, move_pages.2, mprotect.2, msgop.2, nfsservctl.2, perf_event_open.2, pread.2, ptrace.2, recvmmsg.2, rename.2, restart_syscall.2, sched_setattr.2, send.2, shmop.2, shutdown.2, sigaction.2, signalfd.2, syscalls.2, timer_create.2, timerfd_create.2, tkill.2, vmsplice.2, wait.2, aio_init.3, confstr.3, exit.3, fmemopen.3, fopen.3, getaddrinfo.3, getauxval.3, getspnam.3, isalpha.3, isatty.3, mallinfo.3, malloc.3, mallopt.3, psignal.3, pthread_attr_setinheritsched.3, qecvt.3, queue.3, rtnetlink.3, strerror.3, strftime.3, toupper.3, towlower.3, towupper.3, initrd.4, locale.5, proc.5, bootparam.7, capabilities.7, ddp.7, fanotify.7, icmp.7, inotify.7, ip.7, ipv6.7, netdevice.7, netlink.7, path_resolution.7, rtld-audit.7, rtnetlink.7, sched.7, signal.7, socket.7, svipc.7, tcp.7, unix.7, ld.so.8: srcfix: Update FIXMEs
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2014-08-21 21:47:44 +00:00
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.\" FIXME . add amateur radio stuff.
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2004-11-03 13:51:07 +00:00
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.PP
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2007-12-25 20:50:22 +00:00
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Most protocols support their own ioctls to configure protocol-specific
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2007-04-12 22:42:49 +00:00
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interface options.
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See the protocol man pages for a description.
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2014-01-10 17:21:00 +00:00
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For configuring IP addresses, see
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2004-11-03 13:51:07 +00:00
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.BR ip (7).
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.PP
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2014-01-10 17:21:00 +00:00
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In addition, some devices support private ioctls.
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2006-01-03 10:58:34 +00:00
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These are not described here.
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2004-11-03 13:51:07 +00:00
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.SH NOTES
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2004-11-25 08:11:36 +00:00
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Strictly speaking,
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2007-04-12 22:42:49 +00:00
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.B SIOCGIFCONF
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intro.1, _syscall.2, access.2, arch_prctl.2, cacheflush.2, chown.2, clock_getres.2, clone.2, create_module.2, fcntl.2, flock.2, get_kernel_syms.2, get_robust_list.2, get_thread_area.2, getcpu.2, getpriority.2, getrlimit.2, getrusage.2, ioprio_set.2, kexec_load.2, madvise.2, mbind.2, migrate_pages.2, mknod.2, mmap.2, mount.2, move_pages.2, mprotect.2, open.2, pause.2, pciconfig_read.2, perf_event_open.2, prctl.2, ptrace.2, query_module.2, read.2, reboot.2, recv.2, s390_runtime_instr.2, sched_setscheduler.2, select_tut.2, send.2, set_mempolicy.2, setfsgid.2, setfsuid.2, sigaction.2, spu_create.2, spu_run.2, stime.2, swapon.2, syslog.2, timer_create.2, timer_getoverrun.2, times.2, tkill.2, umount.2, unimplemented.2, ustat.2, vm86.2, wait.2, abs.3, aio_read.3, aio_write.3, bsd_signal.3, catgets.3, clearenv.3, cmsg.3, dbopen.3, dirfd.3, dlopen.3, exec.3, fenv.3, ferror.3, fmemopen.3, fnmatch.3, fopen.3, futimes.3, getaddrinfo.3, getifaddrs.3, getipnodebyname.3, hsearch.3, if_nameindex.3, inet_pton.3, mblen.3, mbrlen.3, mbsrtowcs.3, mbtowc.3, mcheck.3, memfrob.3, mq_notify.3, netlink.3, posix_memalign.3, printf.3, pthread_attr_setscope.3, pthread_cleanup_push.3, pthread_kill_other_threads_np.3, pthread_self.3, pthread_setcancelstate.3, pthread_setconcurrency.3, raise.3, resolver.3, rpc.3, rtime.3, rtnetlink.3, scanf.3, setbuf.3, setnetgrent.3, shm_open.3, sigpause.3, sigset.3, sigwait.3, sockatmark.3, strcasecmp.3, strcmp.3, strdup.3, strftime.3, strptime.3, strsignal.3, strverscmp.3, sysv_signal.3, termios.3, wcrtomb.3, wcsnlen.3, wcsnrtombs.3, wcsrtombs.3, wctomb.3, wprintf.3, console_codes.4, cpuid.4, msr.4, rtc.4, sk98lin.4, st.4, tty.4, charmap.5, core.5, elf.5, hosts.equiv.5, proc.5, resolv.conf.5, services.5, slabinfo.5, arp.7, bootparam.7, capabilities.7, charsets.7, cpuset.7, ddp.7, epoll.7, feature_test_macros.7, futex.7, hier.7, icmp.7, inotify.7, ip.7, ipv6.7, man-pages.7, mdoc.7, mdoc.samples.7, netdevice.7, netlink.7, numa.7, packet.7, path_resolution.7, posixoptions.7, pthreads.7, raw.7, rtld-audit.7, rtnetlink.7, sem_overview.7, sigevent.7, socket.7, spufs.7, tcp.7, udp.7, unicode.7, uri.7, utf-8.7, intro.8, ldconfig.8, sync.8: Global fix: fix placement of word "only"
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-03-31 08:53:00 +00:00
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and the other ioctls that accept or return only
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2012-04-22 20:29:44 +00:00
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.B AF_INET
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socket addresses,
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getcpu.2, getunwind.2, kcmp.2, mmap.2, perf_event_open.2, perfmonctl.2, quotactl.2, restart_syscall.2, btree.3, dbopen.3, hash.3, recno.3, sched_getcpu.3, elf.5, bootparam.7, hier.7, netdevice.7, rtnetlink.7: wfix: "xxxx specific" ==> "xxxx-specific"
2014-01-10 17:16:28 +00:00
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are IP-specific and belong in
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2004-11-03 13:51:07 +00:00
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.BR ip (7).
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.LP
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The names of interfaces with no addresses or that don't have the
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2007-04-12 22:42:49 +00:00
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.B IFF_RUNNING
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2004-11-03 13:51:07 +00:00
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flag set can be found via
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.IR /proc/net/dev .
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.LP
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2007-12-10 14:23:34 +00:00
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Local IPv6 IP addresses can be found via
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.I /proc/net
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or via
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2004-11-03 13:51:07 +00:00
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.BR rtnetlink (7).
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.SH BUGS
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2007-04-12 22:42:49 +00:00
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glibc 2.1 is missing the
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.I ifr_newname
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2007-12-09 08:08:53 +00:00
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macro in
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.IR <net/if.h> .
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2007-04-12 22:42:49 +00:00
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Add the following to your program as a workaround:
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2004-11-03 13:51:07 +00:00
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.sp
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2007-12-19 07:19:23 +00:00
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.in +4n
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2004-11-03 13:51:07 +00:00
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.nf
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#ifndef ifr_newname
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#define ifr_newname ifr_ifru.ifru_slave
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#endif
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.fi
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2007-12-19 07:19:23 +00:00
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.in
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getent.1, intro.1, time.1, _exit.2, _syscall.2, accept.2, access.2, acct.2, adjtimex.2, alarm.2, alloc_hugepages.2, arch_prctl.2, bdflush.2, bind.2, brk.2, cacheflush.2, capget.2, chdir.2, chmod.2, chown.2, chroot.2, clock_getres.2, clock_nanosleep.2, clone.2, close.2, connect.2, create_module.2, delete_module.2, dup.2, epoll_create.2, epoll_ctl.2, epoll_wait.2, eventfd.2, execve.2, exit_group.2, faccessat.2, fchmodat.2, fchownat.2, fcntl.2, flock.2, fork.2, fstatat.2, fsync.2, futex.2, futimesat.2, get_kernel_syms.2, get_robust_list.2, get_thread_area.2, getcpu.2, getdents.2, getdomainname.2, getgid.2, getgroups.2, gethostname.2, getitimer.2, getpagesize.2, getpeername.2, getpid.2, getpriority.2, getresuid.2, getrlimit.2, getrusage.2, getsid.2, getsockname.2, getsockopt.2, gettid.2, gettimeofday.2, getuid.2, getunwind.2, getxattr.2, idle.2, init_module.2, inotify_add_watch.2, inotify_init.2, inotify_rm_watch.2, intro.2, io_cancel.2, io_destroy.2, io_getevents.2, io_setup.2, io_submit.2, ioctl.2, ioctl_list.2, ioperm.2, iopl.2, ioprio_set.2, ipc.2, kcmp.2, kill.2, killpg.2, link.2, linkat.2, listen.2, listxattr.2, llseek.2, lookup_dcookie.2, lseek.2, madvise.2, migrate_pages.2, mincore.2, mkdir.2, mkdirat.2, mknod.2, mknodat.2, mlock.2, mmap.2, mmap2.2, modify_ldt.2, mount.2, move_pages.2, mprotect.2, mq_getsetattr.2, mremap.2, msgctl.2, msgget.2, msgop.2, msync.2, nanosleep.2, nfsservctl.2, nice.2, open.2, openat.2, outb.2, pause.2, pciconfig_read.2, perf_event_open.2, perfmonctl.2, personality.2, pipe.2, pivot_root.2, poll.2, posix_fadvise.2, prctl.2, pread.2, process_vm_readv.2, ptrace.2, query_module.2, quotactl.2, read.2, readahead.2, readdir.2, readlink.2, readlinkat.2, readv.2, reboot.2, recv.2, remap_file_pages.2, removexattr.2, rename.2, renameat.2, rmdir.2, rt_sigqueueinfo.2, sched_get_priority_max.2, sched_rr_get_interval.2, sched_setaffinity.2, sched_setparam.2, sched_setscheduler.2, sched_yield.2, select.2, semctl.2, semget.2, semop.2, send.2, sendfile.2, set_thread_area.2, set_tid_address.2, seteuid.2, setfsgid.2, setfsuid.2, setgid.2, setpgid.2, setresuid.2, setreuid.2, setsid.2, setuid.2, setup.2, setxattr.2, shmctl.2, shmget.2, shmop.2, shutdown.2, sigaction.2, sigaltstack.2, signal.2, signalfd.2, sigpending.2, sigprocmask.2, sigreturn.2, sigsuspend.2, sigwaitinfo.2, socket.2, socketcall.2, socketpair.2, splice.2, stat.2, statfs.2, stime.2, swapon.2, symlink.2, symlinkat.2, sync.2, sync_file_range.2, sysctl.2, sysfs.2, sysinfo.2, syslog.2, tee.2, time.2, timerfd_create.2, times.2, tkill.2, truncate.2, umask.2, umount.2, uname.2, unimplemented.2, unlink.2, unlinkat.2, uselib.2, ustat.2, utime.2, utimensat.2, vfork.2, vhangup.2, vm86.2, vmsplice.2, wait.2, wait4.2, write.2, CPU_SET.3, INFINITY.3, MB_CUR_MAX.3, MB_LEN_MAX.3, __setfpucw.3, a64l.3, abort.3, abs.3, acos.3, acosh.3, addseverity.3, adjtime.3, aio_cancel.3, aio_error.3, aio_fsync.3, aio_read.3, aio_return.3, aio_suspend.3, aio_write.3, alloca.3, argz_add.3, asin.3, asinh.3, asprintf.3, assert.3, assert_perror.3, atan.3, atan2.3, atanh.3, atexit.3, atof.3, atoi.3, backtrace.3, basename.3, bcmp.3, bcopy.3, bindresvport.3, bsd_signal.3, bsearch.3, bstring.3, btowc.3, btree.3, byteorder.3, bzero.3, cabs.3, cacos.3, cacosh.3, canonicalize_file_name.3, carg.3, casin.3, casinh.3, catan.3, catanh.3, catgets.3, catopen.3, cbrt.3, ccos.3, ccosh.3, ceil.3, cerf.3, cexp.3, cexp2.3, cfree.3, cimag.3, clearenv.3, clock.3, clock_getcpuclockid.3, clog.3, clog10.3, clog2.3, closedir.3, cmsg.3, confstr.3, conj.3, copysign.3, cos.3, cosh.3, cpow.3, cproj.3, creal.3, crypt.3, csin.3, csinh.3, csqrt.3, ctan.3, ctanh.3, ctermid.3, ctime.3, daemon.3, dbopen.3, des_crypt.3, difftime.3, dirfd.3, div.3, dl_iterate_phdr.3, dlopen.3, dprintf.3, drand48.3, drand48_r.3, dysize.3, ecvt.3, ecvt_r.3, encrypt.3, end.3, endian.3, envz_add.3, erf.3, erfc.3, err.3, errno.3, error.3, ether_aton.3, euidaccess.3, exec.3, exit.3, exp.3, exp10.3, exp2.3, expm1.3, fabs.3, fclose.3, fcloseall.3, fdim.3, fenv.3, ferror.3, fexecve.3, fflush.3, ffs.3, fgetgrent.3, fgetpwent.3, fgetwc.3, fgetws.3, finite.3, flockfile.3, floor.3, fma.3, fmax.3, fmemopen.3, fmin.3, fmod.3, fmtmsg.3, fnmatch.3, fopen.3, fpathconf.3, fpclassify.3, fpurge.3, fputwc.3, fputws.3, fread.3, frexp.3, fseek.3, fseeko.3, ftime.3, ftok.3, fts.3, ftw.3, futimes.3, fwide.3, gamma.3, gcvt.3, getaddrinfo.3, getaddrinfo_a.3, getauxval.3, getcontext.3, getcwd.3, getdate.3, getdirentries.3, getdtablesize.3, getenv.3, getfsent.3, getgrent.3, getgrent_r.3, getgrnam.3, getgrouplist.3, gethostbyname.3, gethostid.3, getipnodebyname.3, getline.3, getloadavg.3, getlogin.3, getmntent.3, getnameinfo.3, getnetent.3, getnetent_r.3, getopt.3, getpass.3, getprotoent.3, getprotoent_r.3, getpt.3, getpw.3, getpwent.3, getpwent_r.3, getpwnam.3, getrpcent.3, getrpcent_r.3, getrpcport.3, gets.3, getservent.3, getservent_r.3, getspnam.3, getttyent.3, getumask.3, getusershell.3, getutent.3, getw.3, getwchar.3, glob.3, grantpt.3, gsignal.3, hash.3, hsearch.3, hypot.3, iconv.3, iconv_close.3, iconv_open.3, ilogb.3, index.3, inet.3, inet_ntop.3, inet_pton.3, infnan.3, initgroups.3, insque.3, intro.3, isalpha.3, isatty.3, isgreater.3, iswalnum.3, iswalpha.3, iswblank.3, iswcntrl.3, iswctype.3, iswdigit.3, iswgraph.3, iswlower.3, iswprint.3, iswpunct.3, iswspace.3, iswupper.3, iswxdigit.3, j0.3, key_setsecret.3, ldexp.3, lgamma.3, lio_listio.3, localeconv.3, lockf.3, log.3, log10.3, log1p.3, log2.3, logb.3, login.3, longjmp.3, lrint.3, lround.3, lsearch.3, lseek64.3, makecontext.3, makedev.3, malloc.3, malloc_hook.3, mblen.3, mbrlen.3, mbrtowc.3, mbsinit.3, mbsnrtowcs.3, mbsrtowcs.3, mbstowcs.3, mbtowc.3, memccpy.3, memchr.3, memcmp.3, memcpy.3, memfrob.3, memmem.3, memmove.3, mempcpy.3, memset.3, mkdtemp.3, mkfifo.3, mkfifoat.3, mkstemp.3, mktemp.3, modf.3, mpool.3, mq_close.3, mq_getattr.3, mq_notify.3, mq_open.3, mq_receive.3, mq_send.3, mq_unlink.3, mtrace.3, nan.3, netlink.3, nextafter.3, nl_langinfo.3, offsetof.3, on_exit.3, opendir.3, openpty.3, perror.3, popen.3, posix_fallocate.3, posix_memalign.3, posix_openpt.3, pow.3, pow10.3, printf.3, profil.3, program_invocation_name.3, psignal.3, pthread_kill_other_threads_np.3, ptsname.3, putenv.3, putgrent.3, putpwent.3, puts.3, putwchar.3, qecvt.3, qsort.3, queue.3, raise.3, rand.3, random.3, random_r.3, rcmd.3, re_comp.3, readdir.3, realpath.3, recno.3, regex.3, remainder.3, remove.3, remquo.3, resolver.3, rewinddir.3, rexec.3, rint.3, round.3, rpc.3, rpmatch.3, rtime.3, rtnetlink.3, scalb.3, scalbln.3, scandir.3, scandirat.3, scanf.3, seekdir.3, sem_close.3, sem_destroy.3, sem_getvalue.3, sem_init.3, sem_open.3, sem_post.3, sem_unlink.3, sem_wait.3, setaliasent.3, setbuf.3, setenv.3, setjmp.3, setlocale.3, setlogmask.3, setnetgrent.3, shm_open.3, siginterrupt.3, signbit.3, significand.3, sigpause.3, sigqueue.3, sigset.3, sigsetops.3, sigvec.3, sin.3, sincos.3, sinh.3, sleep.3, sockatmark.3, sqrt.3, statvfs.3, stdarg.3, stdin.3, stdio.3, stdio_ext.3, stpcpy.3, stpncpy.3, strcasecmp.3, strcat.3, strchr.3, strcmp.3, strcoll.3, strcpy.3, strdup.3, strerror.3, strfmon.3, strfry.3, strftime.3, string.3, strlen.3, strnlen.3, strpbrk.3, strptime.3, strsep.3, strsignal.3, strspn.3, strstr.3, strtod.3, strtoimax.3, strtok.3, strtol.3, strtoul.3, strverscmp.3, strxfrm.3, swab.3, sysconf.3, syslog.3, system.3, sysv_signal.3, tan.3, tanh.3, tcgetpgrp.3, tcgetsid.3, telldir.3, tempnam.3, termios.3, tgamma.3, timegm.3, timeradd.3, tmpfile.3, tmpnam.3, toascii.3, toupper.3, towctrans.3, towlower.3, towupper.3, trunc.3, tsearch.3, ttyname.3, ttyslot.3, tzset.3, ualarm.3, ulimit.3, ungetwc.3, unlocked_stdio.3, unlockpt.3, updwtmp.3, usleep.3, wcpcpy.3, wcpncpy.3, wcrtomb.3, wcscasecmp.3, wcscat.3, wcschr.3, wcscmp.3, wcscpy.3, wcscspn.3, wcsdup.3, wcslen.3, wcsncasecmp.3, wcsncat.3, wcsncmp.3, wcsncpy.3, wcsnlen.3, wcsnrtombs.3, wcspbrk.3, wcsrchr.3, wcsrtombs.3, wcsspn.3, wcsstr.3, wcstoimax.3, wcstok.3, wcstombs.3, wcswidth.3, wctob.3, wctomb.3, wctrans.3, wctype.3, wcwidth.3, wmemchr.3, wmemcmp.3, wmemcpy.3, wmemmove.3, wmemset.3, wordexp.3, wprintf.3, xcrypt.3, xdr.3, y0.3, cciss.4, console.4, console_codes.4, console_ioctl.4, dsp56k.4, fd.4, full.4, hd.4, hpsa.4, initrd.4, intro.4, lp.4, mem.4, mouse.4, null.4, pts.4, ram.4, random.4, rtc.4, sk98lin.4, st.4, tty.4, ttyS.4, tty_ioctl.4, vcs.4, wavelan.4, acct.5, charmap.5, dir_colors.5, filesystems.5, ftpusers.5, group.5, host.conf.5, hosts.5, hosts.equiv.5, intro.5, issue.5, locale.5, motd.5, networks.5, nologin.5, nscd.conf.5, passwd.5, proc.5, protocols.5, resolv.conf.5, rpc.5, securetty.5, services.5, shells.5, termcap.5, ttytype.5, utmp.5, armscii-8.7, arp.7, ascii.7, bootparam.7, capabilities.7, charsets.7, complex.7, cp1251.7, credentials.7, ddp.7, environ.7, epoll.7, fifo.7, futex.7, glob.7, hier.7, icmp.7, inotify.7, intro.7, ip.7, ipv6.7, 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, locale.7, mailaddr.7, man.7, mq_overview.7, netdevice.7, netlink.7, numa.7, packet.7, path_resolution.7, pipe.7, posixoptions.7, pthreads.7, pty.7, raw.7, regex.7, rtld-audit.7, rtnetlink.7, sem_overview.7, shm_overview.7, sigevent.7, signal.7, socket.7, standards.7, suffixes.7, svipc.7, tcp.7, termio.7, time.7, udp.7, udplite.7, unicode.7, unix.7, uri.7, utf-8.7, x25.7, nscd.8, sync.8, tzselect.8, zdump.8, zic.8: Global fix: remove unneeded double quotes in .SH headings
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2013-02-24 18:01:36 +00:00
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.SH SEE ALSO
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2007-06-01 05:24:33 +00:00
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.BR proc (5),
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2004-11-03 13:51:07 +00:00
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.BR capabilities (7),
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.BR ip (7),
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.BR rtnetlink (7)
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