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mkdirat.2: Convert to link to mkdir.2
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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man2/mkdirat.2
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man2/mkdirat.2
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.\" This manpage is Copyright (C) 2006, Michael Kerrisk
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.\"
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.\" %%%LICENSE_START(VERBATIM)
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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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.\"
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.\" Permission is granted to copy and distribute modified versions of this
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.\" manual under the conditions for verbatim copying, provided that the
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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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.\" 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.\" manual page may be incorrect or out-of-date.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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.\" Formatted or processed versions of this manual, if unaccompanied by
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.\" the source, must acknowledge the copyright and authors of this work.
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.\" %%%LICENSE_END
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.\"
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.TH MKDIRAT 2 2012-05-04 "Linux" "Linux Programmer's Manual"
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.SH NAME
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mkdirat \- create a directory relative to a directory file descriptor
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.SH SYNOPSIS
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.nf
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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 mkdirat(int " dirfd ", const char *" pathname ", mode_t " mode );
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.fi
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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 mkdirat ():
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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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Since glibc 2.10:
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_XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
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.TP
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Before glibc 2.10:
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_ATFILE_SOURCE
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.RE
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.ad
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.PD
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.SH DESCRIPTION
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The
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.BR mkdirat ()
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system call operates in exactly the same way as
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.BR mkdir (2),
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except for the differences described in this manual page.
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If the pathname given in
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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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.I dirfd
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(rather than relative to the current working directory of
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the calling process, as is done by
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.BR mkdir (2)
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for a relative pathname).
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If
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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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then
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.I pathname
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is interpreted relative to the current working
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directory of the calling process (like
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.BR mkdir (2)).
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If
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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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.BR mkdirat ()
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returns 0.
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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 mkdir (2)
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can also occur for
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.BR mkdirat ().
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The following additional errors can occur for
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.BR mkdirat ():
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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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.I pathname
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is relative and
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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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.SH VERSIONS
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.BR mkdirat ()
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was added to Linux in kernel 2.6.16;
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library support was added to glibc in version 2.4.
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.SH CONFORMING TO
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POSIX.1-2008.
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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 mkdirat ().
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.SH SEE ALSO
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.BR mkdir (2),
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.BR openat (2),
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.BR path_resolution (7)
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.so man2/mkdir.2
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