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SYMLINK(2)                 Linux Programmer's Manual                SYMLINK(2)



NAME
       symlink - make a new name for a file

SYNOPSIS
       #include <unistd.h>

       int symlink(const char *oldpath, const char *newpath);

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

       symlink(): _BSD_SOURCE || _XOPEN_SOURCE >= 500 || _POSIX_C_SOURCE >= 200112L

DESCRIPTION
       symlink()  creates a symbolic link named newpath which contains the string oldpath.

       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.

       Symbolic  links may contain ..  path components, which (if used at the start of the
       link) refer to the parent directories of that in which the link resides.

       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.

       The  permissions  of  a symbolic link are irrelevant; the ownership is ignored when
       following the link, but is  checked  when  removal  or  renaming  of  the  link  is
       requested and the link is in a directory with the sticky bit (S_ISVTX) set.

       If newpath exists it will not be overwritten.

RETURN VALUE
       On success, zero is returned.  On error, -1 is returned, and errno is set appropri-
       ately.

ERRORS
       EACCES Write access to the directory containing newpath is denied, or  one  of  the
              directories  in  the path prefix of newpath did not allow search permission.
              (See also path_resolution(7).)

       EEXIST newpath already exists.

       EFAULT oldpath or newpath points outside your accessible address space.

       EIO    An I/O error occurred.

       ELOOP  Too many symbolic links were encountered in resolving newpath.

       ENAMETOOLONG
              oldpath or newpath was too long.

       ENOENT A directory component in newpath does not exist or is  a  dangling  symbolic
              link, or oldpath is the empty string.

       ENOMEM Insufficient kernel memory was available.

       ENOSPC The device containing the file has no room for the new directory entry.

       ENOTDIR
              A component used as a directory in newpath is not, in fact, a directory.

       EPERM  The file system containing newpath does not support the creation of symbolic
              links.

       EROFS  newpath is on a read-only file system.

CONFORMING TO
       SVr4, 4.3BSD, POSIX.1-2001.

NOTES
       No checking of oldpath is done.

       Deleting the name referred to by a symlink will actually delete the file (unless it
       also has other hard links).  If this behavior is not desired, use link(2).

SEE ALSO
       ln(1), lchown(2), link(2), lstat(2), open(2), readlink(2), rename(2), symlinkat(2),
       unlink(2), path_resolution(7), symlink(7)

COLOPHON
       This page is part of release 3.22 of the Linux man-pages project.  A description of
       the  project, and information about reporting bugs, can be found at http://www.ker-
       nel.org/doc/man-pages/.



Linux                             2007-07-26                        SYMLINK(2)

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