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Amiga Format CD 7
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Amiga Format AFCD07 (Dec 1996, Issue 91).iso
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ixemul-complete
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ixemul
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library
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unlink.c
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1996-05-18
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101 lines
/*
* This file is part of ixemul.library for the Amiga.
* Copyright (C) 1991, 1992 Markus M. Wild
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* unlink.c,v 1.1.1.1 1994/04/04 04:30:37 amiga Exp
*
* unlink.c,v
* Revision 1.1.1.1 1994/04/04 04:30:37 amiga
* Initial CVS check in.
*
* Revision 1.1 1992/05/14 19:55:40 mwild
* Initial revision
*
*/
#define _KERNEL
#include "ixemul.h"
#include "kprintf.h"
#include <string.h>
static int
__delete_func (struct StandardPacket *sp, struct MsgPort *handler,
BPTR parent_lock,
BSTR name,
void *dummy, int *no_error)
{
sp->sp_Pkt.dp_Type = ACTION_DELETE_OBJECT;
sp->sp_Pkt.dp_Arg1 = parent_lock;
sp->sp_Pkt.dp_Arg2 = name;
PutPacket (handler, sp);
__wait_sync_packet (sp);
*no_error = sp->sp_Pkt.dp_Res1 == -1;
/* stop if we failed because of symlink - reference */
return 0;
}
int
unlink (char *name)
{
int err;
struct file *fp;
int result;
struct stat st;
result = 0;
if (syscall(SYS_stat, name, &st) == 0 && (st.st_mode & S_IWUSR) == 0)
if (syscall(SYS_chmod, name, st.st_mode | S_IWUSR))
return -1;
/* first try to normally delete the file, if we get an
* 'object in use' error, we'll try another way out.. */
if (__plock (name, __delete_func, 0)) goto ret;
/* so there was an error.. */
err = IoErr();
if (err == ERROR_OBJECT_IN_USE)
{
/* check whether the name is an absolute filename, if yes, we
* can walk thru our filetab to see, whether WE have this file
* open, and set its unlink-flag, if not, return the error */
/* if we fully and consistent allow Unix-pathnames, we can test
* for a leading '/' too. */
if (index(name, ':') || ((ix.ix_flags & ix_translate_slash) && name[1] && name[0] == '/'))
{
ix_lock_base();
for (fp = ix.ix_file_tab; fp < ix.ix_fileNFILE; fp++)
if (fp->f_count && fp->f_name && !strcmp(fp->f_name, name))
{
fp->f_flags |= FUNLINK;
ix_unlock_base();
goto ret;
}
ix_unlock_base();
}
}
errno = __ioerr_to_errno(err);
KPRINTF (("&errno = %lx, errno = %ld\n", &errno, errno));
result = -1;
ret:
return result;
}