mknodat(2)

1MKNODAT(2)                 Linux Programmer's Manual                MKNODAT(2)
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NAME

6       mknodat  -  create  a  special or ordinary file relative to a directory
7       file descriptor
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SYNOPSIS

10       #include <fcntl.h> /* Definition of AT_* constants */
11       #include <sys/stat.h>
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13       int mknodat(int dirfd, const char *pathname, mode_t mode, dev_t dev);
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15   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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17       mknodat():
18           Since glibc 2.10:
19                _XOPEN_SOURCE >= 700
20           Before glibc 2.10:
21               _ATFILE_SOURCE
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DESCRIPTION

24       The mknodat() system call operates in exactly the same way as mknod(2),
25       except for the differences described in this manual page.
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27       If  the  pathname given in pathname is relative, then it is interpreted
28       relative to the directory referred to  by  the  file  descriptor  dirfd
29       (rather  than  relative to the current working directory of the calling
30       process, as is done by mknod(2) for a relative pathname).
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32       If pathname is relative and dirfd is the special value  AT_FDCWD,  then
33       pathname  is  interpreted  relative to the current working directory of
34       the calling process (like mknod(2)).
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36       If pathname is absolute, then dirfd is ignored.
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RETURN VALUE

39       On success, mknodat() returns 0.  On error, -1 is returned and errno is
40       set to indicate the error.
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ERRORS

43       The  same  errors that occur for mknod(2) can also occur for mknodat().
44       The following additional errors can occur for mknodat():
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46       EBADF  dirfd is not a valid file descriptor.
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48       ENOTDIR
49              pathname is relative and dirfd is a file descriptor referring to
50              a file other than a directory.
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VERSIONS

53       mknodat()  was  added  to  Linux  in kernel 2.6.16; library support was
54       added to glibc in version 2.4.
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CONFORMING TO

57       POSIX.1-2008.
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NOTES

60       See openat(2) for an explanation of the need for mknodat().
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COLOPHON

66       This page is part of release 3.53 of the Linux  man-pages  project.   A
67       description  of  the project, and information about reporting bugs, can
68       be found at http://www.kernel.org/doc/man-pages/.
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72Linux                             2012-05-04                        MKNODAT(2)