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.\" Hey Emacs! This file is -*- nroff -*- source.
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.\"
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.\" This manpage is Copyright (C) 2006, Michael Kerrisk
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.\"
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.\" Permission is granted to make and distribute verbatim copies of this
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.\" manual provided the copyright notice and this permission notice are
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.\" preserved on all copies.
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.\" Permission is granted to copy and distribute modified versions of this
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.\" entire resulting derived work is distributed under the terms of a
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.\" permission notice identical to this one.
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.\"
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2006-04-05 05:17:23 +00:00
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.\" Since the Linux kernel and libraries are constantly changing, this
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.\" manual page may be incorrect or out-of-date. The author(s) assume no
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.\" responsibility for errors or omissions, or for damages resulting from
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.\" the use of the information contained herein. The author(s) may not
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.\" have taken the same level of care in the production of this manual,
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.\" which is licensed free of charge, as they might when working
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.\" professionally.
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.\"
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_exit.2, brk.2, capget.2, chdir.2, chmod.2, chown.2, chroot.2, getdtablesize.2, gethostname.2, getpagesize.2, getsid.2, killpg.2, mknod.2, mknodat.2, poll.2, posix_fadvise.2, pread.2, readlink.2, setpgid.2, setreuid.2, sigaltstack.2, stat.2, symlink.2, sync.2, truncate.2, vfork.2, wait.2, wait4.2, a64l.3, abs.3, acos.3, acosh.3, asin.3, asinh.3, atan.3, atan2.3, atoi.3, cbrt.3, ceil.3, copysign.3, cosh.3, dirfd.3, div.3, ecvt.3, erf.3, erfc.3, exp.3, exp2.3, fabs.3, fdim.3, ffs.3, floor.3, fma.3, fmax.3, fmin.3, fmod.3, fpclassify.3, frexp.3, ftw.3, fwide.3, gcvt.3, getcwd.3, getdate.3, getgrent.3, gethostid.3, getpass.3, getpwent.3, getsubopt.3, getw.3, hypot.3, ilogb.3, index.3, isalpha.3, isgreater.3, iswblank.3, j0.3, ldexp.3, lockf.3, log.3, log10.3, log1p.3, logb.3, lrint.3, lround.3, mkstemp.3, mktemp.3, modf.3, mq_receive.3, mq_send.3, nan.3, nextafter.3, posix_fallocate.3, posix_memalign.3, printf.3, qecvt.3, random.3, realpath.3, remainder.3, remquo.3, rint.3, round.3, scalb.3, scalbln.3, scanf.3, siginterrupt.3, signbit.3, sigset.3, sinh.3, sqrt.3, strcasecmp.3, strcat.3, strchr.3, strcmp.3, strcoll.3, strcpy.3, strfry.3, strpbrk.3, strsep.3, strspn.3, strstr.3, strtod.3, strtok.3, strtol.3, strtoul.3, strxfrm.3, tanh.3, tgamma.3, trunc.3, ttyslot.3, ualarm.3, usleep.3, wprintf.3, armscii-8.7, cp1251.7, iso_8859-10.7, iso_8859-11.7, iso_8859-13.7, iso_8859-14.7, iso_8859-3.7, iso_8859-5.7, iso_8859-6.7, iso_8859-8.7, koi8-u.7: tstamp
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-09-19 17:19:13 +00:00
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.TH MKNODAT 2 2010-09-20 "Linux" "Linux Programmer's Manual"
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2006-04-05 05:17:23 +00:00
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.SH NAME
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2007-04-12 22:42:49 +00:00
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mknodat \- create a special or ordinary file relative to a directory
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2006-12-27 03:54:41 +00:00
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file descriptor
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2006-04-05 05:17:23 +00:00
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.SH SYNOPSIS
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.nf
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2007-10-08 18:45:41 +00:00
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.B #include <fcntl.h> /* Definition of AT_* constants */
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.B #include <sys/stat.h>
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.sp
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.BI "int mknodat(int " dirfd ", const char *" pathname ", mode_t " mode \
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", dev_t " dev );
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.fi
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faccessat.2, fchmodat.2, fchownat.2, fstatat.2, futimesat.2, linkat.2, mkdirat.2, mknodat.2, openat.2, readlinkat.2, renameat.2, symlinkat.2, unlinkat.2, utimensat.2, mkfifoat.3: Update feature test macro requirements
Starting in glibc 2.10, defining _XOPEN_SOURCE >= 700,
or _POSIX_C_SOURCE >= 200809 exposes the declarations of
these functions.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2009-12-13 21:54:45 +00:00
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.sp
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.in -4n
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Feature Test Macro Requirements for glibc (see
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.BR feature_test_macros (7)):
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.in
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.sp
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.BR mknodat ():
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2010-09-19 16:58:37 +00:00
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.PD 0
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.ad l
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.RS 4
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.TP 4
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2010-09-26 14:05:14 +00:00
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Since glibc 2.10:
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2010-09-19 16:58:37 +00:00
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_XOPEN_SOURCE\ >=\ 700
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2010-09-19 13:21:52 +00:00
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.\" Other FTM combinations will also expose mknodat(), but this function was
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.\" added in SUSv4, maked XSI, so we'll just document what the standard says
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2010-09-19 16:58:37 +00:00
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.TP 4
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faccessat.2, fchmodat.2, fchownat.2, fstatat.2, futimesat.2, linkat.2, mkdirat.2, mknodat.2, openat.2, readlinkat.2, renameat.2, symlinkat.2, unlinkat.2, utimensat.2, mkfifoat.3: Update feature test macro requirements
Starting in glibc 2.10, defining _XOPEN_SOURCE >= 700,
or _POSIX_C_SOURCE >= 200809 exposes the declarations of
these functions.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2009-12-13 21:54:45 +00:00
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Before glibc 2.10:
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_ATFILE_SOURCE
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2010-09-19 16:58:37 +00:00
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.RE
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.ad
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.PD
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2006-04-05 05:17:23 +00:00
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.SH DESCRIPTION
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The
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.BR mknodat ()
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system call operates in exactly the same way as
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.BR mknod (2),
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except for the differences described in this manual page.
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2007-04-12 22:42:49 +00:00
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If the pathname given in
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2006-04-05 05:17:23 +00:00
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.I pathname
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is relative, then it is interpreted relative to the directory
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referred to by the file descriptor
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2007-09-20 16:26:31 +00:00
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.I dirfd
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2007-04-12 22:42:49 +00:00
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(rather than relative to the current working directory of
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2006-04-05 05:17:23 +00:00
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the calling process, as is done by
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.BR mknod (2)
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for a relative pathname).
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2006-08-09 09:08:01 +00:00
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If
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2006-04-05 05:17:23 +00:00
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.I pathname
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is relative and
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.I dirfd
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is the special value
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.BR AT_FDCWD ,
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2006-04-05 05:42:36 +00:00
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then
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.I pathname
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2007-04-12 22:42:49 +00:00
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is interpreted relative to the current working
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2006-04-05 05:17:23 +00:00
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directory of the calling process (like
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.BR mknod (2)).
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2006-08-09 09:08:01 +00:00
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If
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2007-09-20 16:26:31 +00:00
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.I pathname
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is absolute, then
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.I dirfd
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is ignored.
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.SH "RETURN VALUE"
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On success,
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2007-04-12 22:42:49 +00:00
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.BR mknodat ()
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returns 0.
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2006-04-05 05:17:23 +00:00
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On error, \-1 is returned and
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.I errno
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is set to indicate the error.
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.SH ERRORS
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The same errors that occur for
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.BR mknod (2)
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can also occur for
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.BR mknodat ().
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2007-04-12 22:42:49 +00:00
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The following additional errors can occur for
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2006-04-05 05:17:23 +00:00
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.BR mknodat ():
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.TP
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.B EBADF
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.I dirfd
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is not a valid file descriptor.
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.TP
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.B ENOTDIR
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2006-04-06 05:19:00 +00:00
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.I pathname
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2006-08-08 16:34:16 +00:00
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is relative and
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2006-04-05 05:17:23 +00:00
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.I dirfd
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is a file descriptor referring to a file other than a directory.
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2007-05-18 16:06:42 +00:00
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.SH VERSIONS
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.BR mknodat ()
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was added to Linux in kernel 2.6.16.
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.SH "CONFORMING TO"
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2008-08-21 06:16:15 +00:00
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POSIX.1-2008.
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2006-04-05 05:17:23 +00:00
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.SH NOTES
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See
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.BR openat (2)
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for an explanation of the need for
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.BR mknodat ().
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.SH "SEE ALSO"
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.BR mknod (2),
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2006-09-04 09:21:26 +00:00
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.BR openat (2),
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2007-05-26 12:41:39 +00:00
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.BR path_resolution (7)
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