120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
|
|
#include "fs.h"
|
|
#include <sys/stat.h>
|
|
#include <string.h>
|
|
#include <minix/com.h>
|
|
#include <minix/callnr.h>
|
|
|
|
#include "buf.h"
|
|
#include "inode.h"
|
|
#include "super.h"
|
|
|
|
#include <minix/vfsif.h>
|
|
|
|
static int panicking;
|
|
|
|
/*===========================================================================*
|
|
* no_sys *
|
|
*===========================================================================*/
|
|
PUBLIC int no_sys()
|
|
{
|
|
/* Somebody has used an illegal system call number */
|
|
return(EINVAL);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* panic *
|
|
*===========================================================================*/
|
|
PUBLIC void panic(who, mess, num)
|
|
char *who; /* who caused the panic */
|
|
char *mess; /* panic message string */
|
|
int num; /* number to go with it */
|
|
{
|
|
/* Something awful has happened. Panics are caused when an internal
|
|
* inconsistency is detected, e.g., a programming error or illegal value of a
|
|
* defined constant.
|
|
*/
|
|
if (panicking) return; /* do not panic during a sync */
|
|
panicking = TRUE; /* prevent another panic during the sync */
|
|
|
|
printf("FS panic (%s): %s ", who, mess);
|
|
if (num != NO_NUM) printf("%d",num);
|
|
(void) fs_sync(); /* flush everything to the disk */
|
|
sys_exit(SELF);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* conv2 *
|
|
*===========================================================================*/
|
|
PUBLIC unsigned conv2(norm, w)
|
|
int norm; /* TRUE if no swap, FALSE for byte swap */
|
|
int w; /* promotion of 16-bit word to be swapped */
|
|
{
|
|
/* Possibly swap a 16-bit word between 8086 and 68000 byte order. */
|
|
if (norm) return( (unsigned) w & 0xFFFF);
|
|
return( ((w&BYTE) << 8) | ( (w>>8) & BYTE));
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* conv4 *
|
|
*===========================================================================*/
|
|
PUBLIC long conv4(norm, x)
|
|
int norm; /* TRUE if no swap, FALSE for byte swap */
|
|
long x; /* 32-bit long to be byte swapped */
|
|
{
|
|
/* Possibly swap a 32-bit long between 8086 and 68000 byte order. */
|
|
unsigned lo, hi;
|
|
long l;
|
|
|
|
if (norm) return(x); /* byte order was already ok */
|
|
lo = conv2(FALSE, (int) x & 0xFFFF); /* low-order half, byte swapped */
|
|
hi = conv2(FALSE, (int) (x>>16) & 0xFFFF); /* high-order half, swapped */
|
|
l = ( (long) lo <<16) | hi;
|
|
return(l);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* clock_time *
|
|
*===========================================================================*/
|
|
PUBLIC time_t clock_time()
|
|
{
|
|
/* This routine returns the time in seconds since 1.1.1970. MINIX is an
|
|
* astrophysically naive system that assumes the earth rotates at a constant
|
|
* rate and that such things as leap seconds do not exist.
|
|
*/
|
|
|
|
register int k;
|
|
clock_t uptime;
|
|
|
|
if ( (k=getuptime(&uptime)) != OK) panic(__FILE__,"clock_time err", k);
|
|
return( (time_t) (boottime + (uptime/HZ)));
|
|
}
|
|
|
|
int mfs_min_f(char *file, int line, int v1, int v2)
|
|
{
|
|
if(v1 < 0 || v2 < 0) {
|
|
printf("mfs:%s:%d: strange string lengths: %d, %d\n",
|
|
file, line, v1, v2);
|
|
panic(file, "strange string lengths", NO_NUM);
|
|
}
|
|
if(v2 >= v1) return v1;
|
|
#if 0
|
|
printf("mfs:%s:%d: truncated %d to %d\n",
|
|
file, line, v1, v2);
|
|
#endif
|
|
return v2;
|
|
}
|
|
|
|
void mfs_nul_f(char *file, int line, char *str, int len, int maxlen)
|
|
{
|
|
if(len < 1) {
|
|
printf("mfs:%s:%d: %d-length string?!\n", file, line, len);
|
|
panic(file, "strange string length", NO_NUM);
|
|
}
|
|
if(len < maxlen && str[len-1] != '\0') {
|
|
printf("mfs:%s:%d: string (length %d, maxlen %d) "
|
|
"not null-terminated\n",
|
|
file, line, len, maxlen);
|
|
}
|
|
}
|