MKDIR
Section: Linux Programmer's Manual (2)
Updated: 29 March 1994
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NAME
mkdir - create a directory
SYNOPSIS
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
int mkdir(const char *pathname, mode_t mode);
DESCRIPTION
mkdir
attempts to create a directory named
pathname.
mode
specifies the permissions to use. It is modified by the process's
umask
in the usual way: the permissions of the created file are
(mode & ~umask).
The newly created directory will be owned by the effective uid of the
process. If the directory containing the file has the set group id
bit set, or if the filesystem is mounted with BSD group semantics, the
new directory will inherit the group ownership from its parent;
otherwise it will be owned by the effective gid of the process.
If the parent directory has the set group id bit set then so will the
newly created directory.
RETURN VALUE
mkdir
returns zero on success, or -1 if an error occurred (in which case,
errno
is set appropriately).
ERRORS
- EEXIST
-
pathname
already exists (not necessarily as a directory).
- EFAULT
-
pathname points outside your accessible address space.
- EACCES
-
The parent directory does not allow write permission to the process,
or one of the directories in
pathname
did not allow search (execute) permission.
- ENAMETOOLONG
-
pathname was too long.
- ENOENT
-
A directory component in
pathname
does not exist or is a dangling symbolic link.
- ENOTDIR
-
A component used as a directory in
pathname
is not, in fact, a directory.
- ENOMEM
-
Insufficient kernel memory was available.
- EROFS
-
pathname
refers to a file on a read-only filesystem and write access was
requested.
- ELOOP
-
pathname
contains a reference to a circular symbolic link, ie a symbolic link
whose expansion contains a reference to itself.
- ENOSPC
-
The device containing
pathname
has no room for the new directory.
ENOSPC
The new directory cannot be created because the user's disk quota is
exhausted.
CONFORMING TO
BUGS
In some older versions of Linux (for example, 0.99pl7) all the normal
filesystems sometime allow the creation of two files in the same
directory with the same name. This occurs only rarely and only on a
heavily loaded system. It is believed that this bug was fixed in the
Minix filesystem in Linux 0.99pl8 pre-release; and it is hoped that it
was fixed in the other filesystems shortly afterwards.
There are many infelicities in the protocol underlying NFS.
SEE ALSO
read(2), write(2), fcntl(2), close(2),
unlink(2), open(2), mknod(2), stat(2), umask(2),
mount(2), socket(2), socket(2), fopen(3).
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- BUGS
-
- SEE ALSO
-
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