Originální popis anglicky:
mkdir - make a directory
Návod, kniha: POSIX Programmer's Manual
#include <sys/stat.h>
int mkdir(const char *
path, mode_t
mode );
The
mkdir() function shall create a new directory with name
path.
The file permission bits of the new directory shall be initialized from
mode. These file permission bits of the
mode argument shall be
modified by the process' file creation mask.
When bits in
mode other than the file permission bits are set, the
meaning of these additional bits is implementation-defined.
The directory's user ID shall be set to the process' effective user ID. The
directory's group ID shall be set to the group ID of the parent directory or
to the effective group ID of the process. Implementations shall provide a way
to initialize the directory's group ID to the group ID of the parent
directory. Implementations may, but need not, provide an
implementation-defined way to initialize the directory's group ID to the
effective group ID of the calling process.
The newly created directory shall be an empty directory.
If
path names a symbolic link,
mkdir() shall fail and set
errno to [EEXIST].
Upon successful completion,
mkdir() shall mark for update the
st_atime,
st_ctime, and
st_mtime fields of the directory.
Also, the
st_ctime and
st_mtime fields of the directory that
contains the new entry shall be marked for update.
Upon successful completion,
mkdir() shall return 0. Otherwise, -1 shall
be returned, no directory shall be created, and
errno shall be set to
indicate the error.
The
mkdir() function shall fail if:
- EACCES
- Search permission is denied on a component of the path
prefix, or write permission is denied on the parent directory of the
directory to be created.
- EEXIST
- The named file exists.
- ELOOP
- A loop exists in symbolic links encountered during
resolution of the path argument.
- EMLINK
- The link count of the parent directory would exceed
{LINK_MAX}.
- ENAMETOOLONG
- The length of the path argument exceeds {PATH_MAX}
or a pathname component is longer than {NAME_MAX}.
- ENOENT
- A component of the path prefix specified by path
does not name an existing directory or path is an empty
string.
- ENOSPC
- The file system does not contain enough space to hold the
contents of the new directory or to extend the parent directory of the new
directory.
- ENOTDIR
- A component of the path prefix is not a directory.
- EROFS
- The parent directory resides on a read-only file system.
The
mkdir() function may fail if:
- ELOOP
- More than {SYMLOOP_MAX} symbolic links were encountered
during resolution of the path argument.
- ENAMETOOLONG
- As a result of encountering a symbolic link in resolution
of the path argument, the length of the substituted pathname string
exceeded {PATH_MAX}.
The following sections are informative.
The following example shows how to create a directory named
/home/cnd/mod1, with read/write/search permissions for owner and group,
and with read/search permissions for others.
#include <sys/types.h>
#include <sys/stat.h>
int status;
...
status = mkdir("/home/cnd/mod1", S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
None.
The
mkdir() function originated in 4.2 BSD and was added to System V in
Release 3.0.
4.3 BSD detects [ENAMETOOLONG].
The POSIX.1-1990 standard required that the group ID of a newly created
directory be set to the group ID of its parent directory or to the effective
group ID of the creating process. FIPS 151-2 required that implementations
provide a way to have the group ID be set to the group ID of the containing
directory, but did not prohibit implementations also supporting a way to set
the group ID to the effective group ID of the creating process. Conforming
applications should not assume which group ID will be used. If it matters, an
application can use
chown() to set the group ID after the directory is
created, or determine under what conditions the implementation will set the
desired group ID.
None.
umask() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<sys/stat.h>,
<sys/types.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
