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/*
* $Source$
* $Author$
*
* Copyright 1990 by the Massachusetts Institute of Technology.
*
* For copying and distribution information, please see the file
* <krb5/mit-copyright.h>.
*
* libos: krb5_lock_file routine
*/
#if !defined(lint) && !defined(SABER)
static char rcsid_lock_file_c [] =
"$Id$";
#endif /* !lint & !SABER */
#include <krb5/copyright.h>
#include <krb5/krb5.h>
#include <krb5/krb5_err.h>
#include <krb5/libos.h>
#include <stdio.h>
#include <sys/file.h>
#include <sys/types.h>
#include <krb5/ext-proto.h>
extern int errno;
/*ARGSUSED*/
krb5_error_code
krb5_lock_file(filep, pathname, mode)
FILE *filep;
char *pathname;
int mode;
{
int flock_flag = -1;
switch (mode & ~KRB5_LOCKMODE_DONTBLOCK) {
case KRB5_LOCKMODE_SHARED:
flock_flag = LOCK_SH;
case KRB5_LOCKMODE_EXCLUSIVE:
flock_flag = LOCK_EX;
case KRB5_LOCKMODE_UNLOCK:
flock_flag = LOCK_UN;
}
if (flock_flag == -1)
return(KRB5_LIBOS_BADLOCKFLAG);
if (mode & KRB5_LOCKMODE_DONTBLOCK)
flock_flag |= LOCK_NB;
if (flock(fileno(filep), flock_flag) == -1)
return(errno);
return 0;
}
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