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75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
/**
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* @file
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*
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* @brief Remove an Existing Link
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* @ingroup libcsupport
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*/
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/*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <unistd.h>
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#include <rtems/libio_.h>
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/**
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* POSIX 1003.1b - 5.5.1 - Remove an existing link
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*/
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int unlink( const char *path )
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{
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int rv = 0;
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rtems_filesystem_eval_path_context_t ctx;
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int eval_flags = RTEMS_FS_REJECT_TERMINAL_DOT;
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rtems_filesystem_location_info_t parentloc;
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int parent_eval_flags = RTEMS_FS_PERMS_WRITE
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| RTEMS_FS_PERMS_EXEC
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| RTEMS_FS_FOLLOW_LINK;
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const rtems_filesystem_location_info_t *currentloc =
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rtems_filesystem_eval_path_start_with_parent(
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&ctx,
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path,
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eval_flags,
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&parentloc,
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parent_eval_flags
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);
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if ( !rtems_filesystem_location_is_instance_root( currentloc ) ) {
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const rtems_filesystem_operations_table *ops = currentloc->mt_entry->ops;
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rv = (*ops->rmnod_h)( &parentloc, currentloc );
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} else {
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rtems_filesystem_eval_path_error( &ctx, EBUSY );
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rv = -1;
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}
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rtems_filesystem_eval_path_cleanup_with_parent( &ctx, &parentloc );
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return rv;
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}
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#if defined(RTEMS_NEWLIB)
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#include <reent.h>
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/**
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* This is the Newlib dependent reentrant version of unlink().
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*/
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int _unlink_r(
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struct _reent *ptr __attribute__((unused)),
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const char *path
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)
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{
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return unlink( path );
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}
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#endif
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