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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-24 04:52:22 +0000
commit3d08cd331c1adcf0d917392f7e527b3f00511748 (patch)
tree312f0d1e1632f48862f044b8bb87e602dcffb5f9 /man2/symlink.2
parentAdding debian version 6.7-2. (diff)
downloadmanpages-3d08cd331c1adcf0d917392f7e527b3f00511748.tar.xz
manpages-3d08cd331c1adcf0d917392f7e527b3f00511748.zip
Merging upstream version 6.8.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-.\" This manpage is Copyright (C) 1992 Drew Eckhardt;
-.\" and Copyright (C) 1993 Michael Haardt, Ian Jackson.
-.\" and Copyright (C) 2006, 2014 Michael Kerrisk
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" Modified 1993-07-24 by Rik Faith
-.\" Modified 1996-04-26 by Nick Duffek <nsd@bbc.com>
-.\" Modified 1996-11-06 by Eric S. Raymond <esr@thyrsus.com>
-.\" Modified 1997-01-31 by Eric S. Raymond <esr@thyrsus.com>
-.\" Modified 2004-06-23 by Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
-.TH symlink 2 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-symlink, symlinkat \- make a new name for a file
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <unistd.h>
-.P
-.BI "int symlink(const char *" target ", const char *" linkpath );
-.P
-.BR "#include <fcntl.h> " "/* Definition of " AT_* " constants */"
-.B #include <unistd.h>
-.P
-.BI "int symlinkat(const char *" target ", int " newdirfd \
-", const char *" linkpath );
-.P
-.fi
-.RS -4
-Feature Test Macro Requirements for glibc (see
-.BR feature_test_macros (7)):
-.RE
-.P
-.BR symlink ():
-.nf
- _XOPEN_SOURCE >= 500 || _POSIX_C_SOURCE >= 200112L
-.\" || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
- || /* glibc <= 2.19: */ _BSD_SOURCE
-.fi
-.P
-.BR symlinkat ():
-.nf
- Since glibc 2.10:
- _POSIX_C_SOURCE >= 200809L
- Before glibc 2.10:
- _ATFILE_SOURCE
-.fi
-.SH DESCRIPTION
-.BR symlink ()
-creates a symbolic link named
-.I linkpath
-which contains the string
-.IR target .
-.P
-Symbolic links are interpreted at run time as if the contents of the
-link had been substituted into the path being followed to find a file or
-directory.
-.P
-Symbolic links may contain
-.I ..
-path components, which (if used at the start of the link) refer to the
-parent directories of that in which the link resides.
-.P
-A symbolic link (also known as a soft link) may point to an existing
-file or to a nonexistent one; the latter case is known as a dangling
-link.
-.P
-The permissions of a symbolic link are irrelevant; the ownership is
-ignored when following the link
-(except when the
-.I protected_symlinks
-feature is enabled, as explained in
-.BR proc (5)),
-but is checked when removal or
-renaming of the link is requested and the link is in a directory with
-the sticky bit
-.RB ( S_ISVTX )
-set.
-.P
-If
-.I linkpath
-exists, it will
-.I not
-be overwritten.
-.SS symlinkat()
-The
-.BR symlinkat ()
-system call operates in exactly the same way as
-.BR symlink (),
-except for the differences described here.
-.P
-If the pathname given in
-.I linkpath
-is relative, then it is interpreted relative to the directory
-referred to by the file descriptor
-.I newdirfd
-(rather than relative to the current working directory of
-the calling process, as is done by
-.BR symlink ()
-for a relative pathname).
-.P
-If
-.I linkpath
-is relative and
-.I newdirfd
-is the special value
-.BR AT_FDCWD ,
-then
-.I linkpath
-is interpreted relative to the current working
-directory of the calling process (like
-.BR symlink ()).
-.P
-If
-.I linkpath
-is absolute, then
-.I newdirfd
-is ignored.
-.P
-See
-.BR openat (2)
-for an explanation of the need for
-.BR symlinkat ().
-.SH RETURN VALUE
-On success, zero is returned.
-On error, \-1 is returned, and
-.I errno
-is set to indicate the error.
-.SH ERRORS
-.TP
-.B EACCES
-Write access to the directory containing
-.I linkpath
-is denied, or one of the directories in the path prefix of
-.I linkpath
-did not allow search permission.
-(See also
-.BR path_resolution (7).)
-.TP
-.B EBADF
-.RB ( symlinkat ())
-.I linkpath
-is relative but
-.I newdirfd
-is neither
-.B AT_FDCWD
-nor a valid file descriptor.
-.TP
-.B EDQUOT
-The user's quota of resources on the filesystem has been exhausted.
-The resources could be inodes or disk blocks, depending on the filesystem
-implementation.
-.TP
-.B EEXIST
-.I linkpath
-already exists.
-.TP
-.B EFAULT
-.IR target " or " linkpath " points outside your accessible address space."
-.TP
-.B EIO
-An I/O error occurred.
-.TP
-.B ELOOP
-Too many symbolic links were encountered in resolving
-.IR linkpath .
-.TP
-.B ENAMETOOLONG
-.IR target " or " linkpath " was too long."
-.TP
-.B ENOENT
-A directory component in
-.I linkpath
-does not exist or is a dangling symbolic link, or
-.I target
-or
-.I linkpath
-is an empty string.
-.TP
-.B ENOENT
-.RB ( symlinkat ())
-.I linkpath
-is a relative pathname and
-.I newdirfd
-refers to a directory that has been deleted.
-.TP
-.B ENOMEM
-Insufficient kernel memory was available.
-.TP
-.B ENOSPC
-The device containing the file has no room for the new directory
-entry.
-.TP
-.B ENOTDIR
-A component used as a directory in
-.I linkpath
-is not, in fact, a directory.
-.TP
-.B ENOTDIR
-.RB ( symlinkat ())
-.I linkpath
-is relative and
-.I newdirfd
-is a file descriptor referring to a file other than a directory.
-.TP
-.B EPERM
-The filesystem containing
-.I linkpath
-does not support the creation of symbolic links.
-.TP
-.B EROFS
-.I linkpath
-is on a read-only filesystem.
-.SH STANDARDS
-POSIX.1-2008.
-.SH HISTORY
-.TP
-.BR symlink ()
-SVr4, 4.3BSD, POSIX.1-2001.
-.\" SVr4 documents additional error codes EDQUOT and ENOSYS.
-.\" See
-.\" .BR open (2)
-.\" re multiple files with the same name, and NFS.
-.TP
-.BR symlinkat ()
-POSIX.1-2008.
-Linux 2.6.16,
-glibc 2.4.
-.SS glibc notes
-On older kernels where
-.BR symlinkat ()
-is unavailable, the glibc wrapper function falls back to the use of
-.BR symlink ().
-When
-.I linkpath
-is a relative pathname,
-glibc constructs a pathname based on the symbolic link in
-.I /proc/self/fd
-that corresponds to the
-.I newdirfd
-argument.
-.SH NOTES
-No checking of
-.I target
-is done.
-.P
-Deleting the name referred to by a symbolic link will actually delete the
-file (unless it also has other hard links).
-If this behavior is not desired, use
-.BR link (2).
-.SH SEE ALSO
-.BR ln (1),
-.BR namei (1),
-.BR lchown (2),
-.BR link (2),
-.BR lstat (2),
-.BR open (2),
-.BR readlink (2),
-.BR rename (2),
-.BR unlink (2),
-.BR path_resolution (7),
-.BR symlink (7)