www.pudn.com > bootmenu.zip > S_I386.C

/* This file contains system-specific functions suitable for 
 * most AT&T System V/386 variants (ISC,SCO,Intel...). 
 * The program pfdisk.c calls these routines. 
 */ 
#include  
#include  
#include  
#include  
 
#define extern 
#include "sysdep.h" 
#undef extern 
 
int usage(prog)	/* print a usage message */ 
char	*prog;	/* program name */ 
{ 
  fprintf(stderr,"Usage: %s dev\n\ 
	where 'dev' is the device name, i.e. /dev/rdsk/0p0\n\ 
	(The device must start on absolute sector zero.)\n",prog); 
} 
 
void getGeometry(dev, c, h, s) 
char	*dev;		/* device name */ 
unsigned *c,*h,*s;	/* cyls, heads, sectors */ 
{ 
  int devfd, retval; 
  struct disk_parms dp; 
   
  devfd = open(dev, O_RDONLY, 0); 
  if (devfd < 0) { 
    fprintf(stderr,"%s: can't open for reading\n", dev); 
    return; 
  } 
  retval = ioctl(devfd, V_GETPARMS, &dp); 
  close(devfd); 
  if (retval < 0) { 
    fprintf(stderr,"%s: can't get disk parameters\n", dev); 
    return; 
  } 
  if (dp.dp_type != DPT_WINI) { 
    fprintf(stderr,"%s: not a Winchester Disk\n", dev); 
    return; 
  } 
  *c = dp.dp_cyls; 
  *h = dp.dp_heads; 
  *s = dp.dp_sectors; 
} 
 
int getFile(name, buf, len)	/* read file into buffer */ 
char	*name, *buf; 
int	len; 
{	/* (open, read, close) */ 
  int devfd, retval; 
   
  devfd = open(name, O_RDONLY, 0); 
  if (devfd < 0) { 
    fprintf(stderr,"%s: can't open for reading\n", name); 
    return(devfd); 
  } 
  retval = read(devfd, buf, len); 
  if (retval < 0) 
    fprintf(stderr,"%s: read failed\n", name); 
  close(devfd); 
  return(retval); 
} 
 
int putFile(name, buf, len)	/* write buffer to file */ 
char	*name, *buf; 
int	len; 
{	/* (open, write, close) */ 
  int devfd, retval; 
   
  devfd = open(name, O_WRONLY|O_CREAT, 0666); 
  if (devfd < 0) { 
    fprintf(stderr,"%s: can't open for writing\n", name); 
    return(devfd); 
  } 
  retval = write(devfd, buf, len); 
  if (retval < 0) 
    fprintf(stderr,"%s: write failed\n", name); 
  close(devfd); 
  return(retval); 
} 
 
int getBBlk(devname, buffer)	/* read block into buffer */ 
char	*devname, *buffer;	/* (open, read, close) */ 
{ 
  int devfd, retval; 
   
  devfd = open(devname,O_RDONLY); 
  if (devfd < 0) { 
    printf("%s: can't open for read\n", devname); 
    return(devfd); 
  } 
  retval = read(devfd, buffer, SECSIZE); 
  close(devfd); 
  return(retval); 
} 
 
int putBBlk(devname, buffer)	/* write buffer to device */ 
char	*devname, *buffer;	/* (open, write, close) */ 
{ 
  int devfd, retval; 
   
  devfd = open(devname,O_WRONLY); 
  if (devfd < 0) { 
    printf("%s: can't open for write\n",devname); 
    return(devfd); 
  } 
  retval = write(devfd, buffer, SECSIZE); 
  sync(); 
  close(devfd); 
  return(retval); 
}