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Use DIOCGPC98 ioctl to write boot block.

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This commit is contained in:
Yoshihiro Takahashi 2003-02-11 07:29:14 +00:00
parent 969e2ea158
commit afb7a66e08
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=110678
1 changed files with 62 additions and 22 deletions
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84
usr.sbin/boot98cfg/boot98cfg.c
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@ -59,6 +59,7 @@
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/diskpc98.h>
#include <err.h>
#include <errno.h>
@ -69,16 +70,19 @@
#include <string.h>
#include <unistd.h>
#define BOOTSIZE 0x2000
#define IPLSIZE 512 /* IPL size */
#define BOOTMENUSIZE 7168 /* Max HDD boot menu size */
#define BOOTMENUOFF 0x400
static char *mkrdev(char *);
static void usage(void);
static int read_boot(const char *, u_char *);
static int write_boot(const char *, u_char *);
u_char boot0buf[0x2000];
char ipl[IPLSIZE];
char menu[BOOTMENUSIZE];
u_char boot0buf[BOOTSIZE];
u_char ipl[IPLSIZE];
u_char menu[BOOTMENUSIZE];
/*
* Produce a device path for a "canonical" name, where appropriate.
@ -110,6 +114,56 @@ usage(void)
exit(1);
}
static int
read_boot(const char *disk, u_char *boot)
{
int fd, n;
/* Read IPL, partition table and HDD boot menu. */
fd = open(disk, O_RDONLY);
if (fd < 0)
err(1, "%s", disk);
n = read(fd, boot, BOOTSIZE);
if (n != BOOTSIZE)
errx(1, "%s: short read", disk);
close(fd);
return 0;
}
static int
write_boot(const char *disk, u_char *boot)
{
int fd, n, i;
char buf[MAXPATHLEN];
fd = open(disk, O_RDWR);
if (fd != -1) {
if (lseek(fd, 0, SEEK_SET) == -1)
err(1, "%s", disk);
if ((n = write(fd, boot, BOOTSIZE)) < 0)
err(1, "%s", disk);
if (n != BOOTSIZE)
errx(1, "%s: short write", disk);
close(fd);
return 0;
}
for (i = 0; i < NDOSPART; i++) {
snprintf(buf, sizeof(buf), "%ss%d", disk, i + 1);
fd = open(buf, O_RDONLY);
if (fd < 0)
continue;
n = ioctl(fd, DIOCGPC98, boot);
if (n != 0)
err(1, "%s: ioctl DIOCGPC98", disk);
close(fd);
return 0;
}
err(1, "%s", disk);
}
int
main(int argc, char *argv[])
{
@ -119,7 +173,7 @@ main(int argc, char *argv[])
char *disk;
int B_flag = 0;
int c;
int fd, fd1;
int fd1;
int n;
int secsize = 512;
int v_flag = 0, version;
@ -177,15 +231,7 @@ main(int argc, char *argv[])
usage();
disk = mkrdev(*argv);
/* Read IPL, partition table and HDD boot menu. */
fd = open(disk, O_RDWR);
if (fd < 0)
err(1, "%s", disk);
n = read(fd, boot0buf, 0x2000);
if (n != 0x2000)
errx(1, "%s: short read", disk);
if (!B_flag && !v_flag)
close(fd);
read_boot(disk, boot0buf);
if (iplbakpath != NULL) {
fd1 = open(iplbakpath, O_WRONLY | O_CREAT | O_TRUNC, 0666);
@ -242,14 +288,8 @@ main(int argc, char *argv[])
if (v_flag)
*(boot0buf + secsize - 4) = (u_char)version;
if (B_flag || v_flag) {
if (lseek(fd, 0, SEEK_SET) == -1 ||
(n = write(fd, boot0buf, 0x2000)) < 0 ||
close(fd))
err(1, "%s", disk);
if (n != 0x2000)
errx(1, "%s: short write", disk);
}
if (B_flag || v_flag)
write_boot(disk, boot0buf);
return 0;
}