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72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Implementation of _cmdname().
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*
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****************************************************************************/
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#ifdef __WATCOMC__
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#include "variety.h"
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#else
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#define _WCRTLINK
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#endif
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <limits.h>
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extern char **_argv; /* argument vector */
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/* NOTE: This file isn't used for QNX. It's got its own version. */
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#ifdef __LINUX__
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_WCRTLINK char *_cmdname( char *name )
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{
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int save_errno = errno;
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int result = readlink( "/proc/self/exe", name, PATH_MAX );
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errno = save_errno;
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/* fall back to argv[0] if readlink doesn't work */
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if( result == -1 || result == PATH_MAX )
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return( strcpy( name, _argv[0] ) );
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/* readlink does not add a NUL so we need to do it ourselves */
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name[result] = '\0';
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return( name );
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}
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#else
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_WCRTLINK char *_cmdname( char *name )
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{
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return( strcpy( name, _argv[0] ) );
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}
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#endif
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