UNLINK(2-SVR3)      RISC/os Reference Manual       UNLINK(2-SVR3)



NAME
     unlink - remove directory entry

SYNOPSIS
     int unlink (path)
     char *path;

DESCRIPTION
     unlink removes the directory entry named by the path name
     pointed to by path.

ERRORS
     The named file is not unlinked if one or more of the follow-
     ing are true:

     [ENOTDIR]           A component of the path prefix is not a
                         directory.

     [ENOENT]            The named file does not exist.

     [EACCES]            Search permission is denied for a com-
                         ponent of the path prefix.

     [EACCES]            Write permission is denied on the direc-
                         tory containing the link to be removed.

     [EPERM]             The named file is a directory and the
                         effective user ID of the process is not
                         super-user.

     [EBUSY]             The entry to be unlinked is the mount
                         point for a mounted file system.

     [ETXTBSY]           The entry to be unlinked is the last
                         link to a pure procedure (shared text)
                         file that is being executed.

     [EROFS]             The directory entry to be unlinked is
                         part of a read-only file system.

     [EFAULT]            path points outside the process's allo-
                         cated address space.

     [EINTR]             A signal was caught during the unlink
                         system call.

     [ENOLINK]           path points to a remote machine and the
                         link to that machine is no longer
                         active.

     [EMULTIHOP]         Components of path require hopping to
                         multiple remote machines.



                        Printed 11/19/92                   Page 1

UNLINK(2-SVR3)      RISC/os Reference Manual       UNLINK(2-SVR3)



     When all links to a file have been removed and no process
     has the file open, the space occupied by the file is freed
     and the file ceases to exist.  If one or more processes have
     the file open when the last link is removed, the removal is
     postponed until all references to the file have been closed.

SEE ALSO
     close(2), link(2), open(2).
     rm(1) in the User's Reference Manual.

DIAGNOSTICS
     Upon successful completion, a value of 0 is returned.  Oth-
     erwise, a value of -1 is returned and errno is set to indi-
     cate the error.









































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