symlink


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 ||
           _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED ||
           _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 renam-
       ing 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 appropriately.

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
              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 3.35 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://man7.org/linux/man-pages/.



Linux                             2010-09-20                        SYMLINK(2)
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