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!UnixLib37
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1996-11-09
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90 lines
/****************************************************************************
*
* $Source: /unixb/home/unixlib/source/unixlib37/src/unix/c/RCS/unlink,v $
* $Date: 1996/10/30 22:04:51 $
* $Revision: 1.3 $
* $State: Rel $
* $Author: unixlib $
*
* $Log: unlink,v $
* Revision 1.3 1996/10/30 22:04:51 unixlib
* Massive changes made by Nick Burret and Peter Burwood.
*
* Revision 1.2 1996/05/06 09:01:35 unixlib
* Updates to sources made by Nick Burrett, Peter Burwood and Simon Callan.
* Saved for 3.7a release.
*
* Revision 1.1 1996/04/19 21:35:27 simon
* Initial revision
*
* Complete re-write, 1994, Alun Jones.
***************************************************************************/
static const char rcs_id[] = "$Id: unlink,v 1.3 1996/10/30 22:04:51 unixlib Rel $";
/* Fixes default of forcible deletions! */
#include <errno.h>
#include <unistd.h>
#include <sys/os.h>
#include <sys/swis.h>
int
unlink (char *file)
{
int r[10];
_kernel_oserror *e;
/* No filename given / no RISC OS equivalent
*/
if (!*file)
{
errno = ENOENT;
return (-1);
}
file = __uname (file, 0);
/* Get file's catalogue entry (unfortunately
* uses wildcards. Still, shouldn't be a major problem)
*/
r[0] = 17;
r[1] = (int) file;
if (e = os_swi (OS_File, r))
{
__seterr (e);
return (-1);
}
/* What was the file's type ?
*/
switch (r[0])
{
case 0: /* Non-existent */
errno = ENOENT;
return (-1);
case 2: /* Directory */
case 3: /* Image FS */
errno = EISDIR;
return (-1);
default: /* File */
break;
}
/* Try to zap the file
*/
r[0] = 6;
r[1] = (int) file;
if (e = os_swi (OS_File, r))
{
/* Should really check for EACCES and EROFS,
* but these errno's seem to float around for
* different FS's!
*/
__seterr (e);
return (-1);
}
return (0);
}