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/*
* $Source$
* $Author$
*
* Copyright 1990 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* <krb5/copyright.h>.
*
* This file contains the source code for krb5_fcc_destroy.
*/
#if !defined(lint) && !defined(SABER)
static char fcc_destry_c[] = "$Id$";
#endif /* !lint && !SABER */
#include <krb5/copyright.h>
#include "fcc.h"
/*
* Effects:
* Destroys the contents of id.
*
* Errors:
* system errors
*/
krb5_error_code krb5_fcc_destroy(id)
krb5_ccache id;
{
struct stat buf;
unsigned long size;
char zeros[BUFSIZ];
register int ret, i;
if (OPENCLOSE(id)) {
ret = open(((krb5_fcc_data *) id->data)->filename, O_RDWR, 0);
if (ret < 0)
return krb5_fcc_interpret(errno);
((krb5_fcc_data *) id->data)->fd = ret;
}
else
lseek(((krb5_fcc_data *) id->data)->fd, 0, L_SET);
ret = unlink(((krb5_fcc_data *) id->data)->filename);
if (ret < 0) {
ret = krb5_fcc_interpret(errno);
if (OPENCLOSE(id)) {
(void) close(((krb5_fcc_data *)id->data)->fd);
((krb5_fcc_data *) id->data)->fd = -1;
}
return ret;
}
ret = fstat(((krb5_fcc_data *) id->data)->fd, &buf);
if (ret < 0) {
ret = krb5_fcc_interpret(errno);
if (OPENCLOSE(id)) {
(void) close(((krb5_fcc_data *)id->data)->fd);
((krb5_fcc_data *) id->data)->fd = -1;
}
return ret;
}
/* XXX This may not be legal XXX */
size = (unsigned long) buf.st_size;
bzero(zeros, BUFSIZ);
for (i=0; i < size / BUFSIZ; i++)
if (write(((krb5_fcc_data *) id->data)->fd, zeros, BUFSIZ) < 0) {
ret = krb5_fcc_interpret(errno);
if (OPENCLOSE(id)) {
(void) close(((krb5_fcc_data *)id->data)->fd);
((krb5_fcc_data *) id->data)->fd = -1;
}
return ret;
}
if (write(((krb5_fcc_data *) id->data)->fd, zeros, size % BUFSIZ) < 0) {
ret = krb5_fcc_interpret(errno);
if (OPENCLOSE(id)) {
(void) close(((krb5_fcc_data *)id->data)->fd);
((krb5_fcc_data *) id->data)->fd = -1;
}
return ret;
}
ret = close(((krb5_fcc_data *) id->data)->fd);
((krb5_fcc_data *) id->data)->fd = -1;
if (ret)
ret = krb5_fcc_interpret(errno);
return ret;
}
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