mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-08-29 16:29:57 +08:00
Joel Sherrill
07a3253de2
overhaul of the RTEMS system call interface. This base file system is the "In-Memory File System" aka IMFS. The design and implementation was done by the following people: + Joel Sherrill (joel@OARcorp.com) + Jennifer Averett (jennifer@OARcorp.com) + Steve "Mr Mount" Salitasc (salitasc@OARcorp.com) + Kerwin Wade (wade@OARcorp.com) PROBLEMS ======== + It is VERY likely that merging this will break the UNIX port. This can/will be fixed. + There is likely some reentrancy/mutual exclusion needed. + Eventually, there should be a "mini-IMFS" description table to eliminate links, symlinks, etc to save memory. All you need to have "classic RTEMS" functionality is technically directories and device IO. All the rest could be left out to save memory.
51 lines
1.0 KiB
C
51 lines
1.0 KiB
C
/*
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* chdir() - POSIX 1003.1b - 5.2.1 - Change Current Working Directory
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*
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* COPYRIGHT (c) 1989-1998.
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* On-Line Applications Research Corporation (OAR).
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* Copyright assigned to U.S. Government, 1994.
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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.OARcorp.com/rtems/license.html.
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*
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* $Id$
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*/
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#include <rtems.h>
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#include <unistd.h>
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#include <errno.h>
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#include "libio_.h"
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int chdir(
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const char *pathname
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)
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{
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rtems_filesystem_location_info_t loc;
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int result;
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/*
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* Get the node where we wish to go.
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*/
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result = rtems_filesystem_evaluate_path( pathname, 0, &loc, TRUE );
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if ( result != 0 )
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return -1;
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/*
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* Verify you can change directory into this node.
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*/
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if ( !loc.ops->node_type )
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set_errno_and_return_minus_one( ENOTSUP );
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if ( (*loc.ops->node_type)( &loc ) != RTEMS_FILESYSTEM_DIRECTORY )
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set_errno_and_return_minus_one( ENOTDIR );
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rtems_filesystem_current = loc;
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return 0;
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}
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