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readlink

print value of a symbolic link or canonical file name


  1. readlink.1.man
  2. readlink.2.man


1. readlink.1.man

Manpage of READLINK

READLINK

Section: User Commands (1)
Updated: October 2011
Index Return to Main Contents
 

NAME

readlink - print value of a symbolic link or canonical file name  

SYNOPSIS

readlink [OPTION]... FILE  

DESCRIPTION

Print value of a symbolic link or canonical file name

-f, --canonicalize
canonicalize by following every symlink in every component of the given name recursively; all but the last component must exist
-e, --canonicalize-existing
canonicalize by following every symlink in every component of the given name recursively, all components must exist
-m, --canonicalize-missing
canonicalize by following every symlink in every component of the given name recursively, without requirements on components existence
-n, --no-newline
do not output the trailing newline
-q, --quiet,
-s, --silent
suppress most error messages
-v, --verbose
report error messages
--help
display this help and exit
--version
output version information and exit
 

AUTHOR

Written by Dmitry V. Levin.  

REPORTING BUGS

Report readlink bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report readlink translation bugs to <http://translationproject.org/team/>  

COPYRIGHT

Copyright © 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.  

SEE ALSO

readlink(2)

The full documentation for readlink is maintained as a Texinfo manual. If the info and readlink programs are properly installed at your site, the command

info coreutils aqreadlink invocationaq

should give you access to the complete manual.


 

Index

NAME
SYNOPSIS
DESCRIPTION
AUTHOR
REPORTING BUGS
COPYRIGHT
SEE ALSO

This document was created by man2html using the manual pages.
Time: 17:32:10 GMT, October 23, 2013

2. readlink.2.man

Manpage of READLINK

READLINK

Section: Linux Programmer's Manual (2)
Updated: 2010-09-20
Index Return to Main Contents
 

NAME

readlink - read value of a symbolic link  

SYNOPSIS

#include <unistd.h>

ssize_t readlink(const char *path, char *buf, size_t bufsiz);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

readlink():

_BSD_SOURCE || _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED || _POSIX_C_SOURCE >= 200112L
 

DESCRIPTION

readlink() places the contents of the symbolic link path in the buffer buf, which has size bufsiz. readlink() does not append a null byte to buf. It will truncate the contents (to a length of bufsiz characters), in case the buffer is too small to hold all of the contents.  

RETURN VALUE

On success, readlink() returns the number of bytes placed in buf. On error, -1 is returned and errno is set to indicate the error.  

ERRORS

EACCES
Search permission is denied for a component of the path prefix. (See also path_resolution(7).)
EFAULT
buf extends outside the process's allocated address space.
EINVAL
bufsiz is not positive.
EINVAL
The named file is not a symbolic link.
EIO
An I/O error occurred while reading from the file system.
ELOOP
Too many symbolic links were encountered in translating the pathname.
ENAMETOOLONG
A pathname, or a component of a pathname, was too long.
ENOENT
The named file does not exist.
ENOMEM
Insufficient kernel memory was available.
ENOTDIR
A component of the path prefix is not a directory.
 

CONFORMING TO

4.4BSD (readlink() first appeared in 4.2BSD), POSIX.1-2001.  

NOTES

In versions of glibc up to and including glibc 2.4, the return type of readlink() was declared as int. Nowadays, the return type is declared as ssize_t, as (newly) required in POSIX.1-2001.  

SEE ALSO

lstat(2), readlinkat(2), stat(2), symlink(2), path_resolution(7), symlink(7)  

COLOPHON

This page is part of release 3.32 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
SEE ALSO
COLOPHON

This document was created by man2html using the manual pages.
Time: 17:32:10 GMT, October 23, 2013

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