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: _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
19       Before glibc 2.10: _ATFILE_SOURCE
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DESCRIPTION

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

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

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

51       mknodat() was added to Linux in kernel 2.6.16.
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CONFORMING TO

54       POSIX.1-2008.
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NOTES

57       See openat(2) for an explanation of the need for mknodat().
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SEE ALSO

60       mknod(2), openat(2), path_resolution(7)
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COLOPHON

63       This  page  is  part of release 3.25 of the Linux man-pages project.  A
64       description of the project, and information about reporting  bugs,  can
65       be found at http://www.kernel.org/doc/man-pages/.
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69Linux                             2009-12-13                        MKNODAT(2)
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