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