symlink - make a new name for a file


     #include <unistd.h>

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


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

     Symbolic links are interpreted at run-time as  if  the  con-
     tents  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 direc-
     tories 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  own-
     ership  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 set.

     If newpath exists it will not be overwritten.


     On success, zero is returned.  On error, -1 is returned, and
     errno is set appropriately.


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

     EFAULT  oldpath or newpath points  outside  your  accessible
             address space.

     EACCES  Write access to the directory containing newpath  is
             not  allowed for the process's effective uid, or one
             of the directories in newpath did not  allow  search
             (execute) permission.

             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

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

     ENOMEM  Insufficient kernel memory was available.

     EROFS   newpath is on a read-only filesystem.

     EEXIST  newpath already exists.

     ELOOP   Too many symbolic links were encountered in  resolv-
             ing newpath.

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

     EIO     An I/O error occurred.


     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 behaviour is not desired, use link.


     SVr4, SVID, POSIX, BSD 4.3.  SVr4 documents additional error
     codes  SVr4,  SVID,  BSD  4.3, X/OPEN.  SVr4 documents addi-
     tional error codes EDQUOT and ENOSYS.  See open(2) re multi-
     ple files with the same name, and NFS.


     readlink(2),   link(2),   unlink(2),   rename(2),   open(2),
     lstat(2), ln(1)