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Write the MBR by using the bootcode verb of the gpart class.

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The "write MBR" verb is kept for backward compatibility, but
the DIOCSMBR ioctl has been removed.
This commit is contained in:
Marcel Moolenaar 2009-03-02 04:35:52 +00:00
parent fe708974cd
commit a565cc2897
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=189273
1 changed files with 22 additions and 27 deletions
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49
usr.sbin/boot0cfg/boot0cfg.c
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@ -343,9 +343,8 @@ read_mbr(const char *disk, u_int8_t **mbr, int check_version)
static void
write_mbr(const char *fname, int flags, u_int8_t *mbr, int mbr_size)
{
int fd, p;
int fd;
ssize_t n;
char *s;
const char *errmsg;
char *pname;
struct gctl_req *grq;
@ -359,6 +358,13 @@ write_mbr(const char *fname, int flags, u_int8_t *mbr, int mbr_size)
return;
}
/*
* If we're called to write to a backup file, don't try to
* write through GEOM. It only generates additional errors.
*/
if (flags != 0)
return;
/* Try open it read only. */
fd = open(fname, O_RDONLY);
if (fd == -1) {
@ -370,39 +376,28 @@ write_mbr(const char *fname, int flags, u_int8_t *mbr, int mbr_size)
warn("error getting providername for %s", fname);
return;
}
if (flags != 0)
err(1, "%s", fname);
grq = gctl_get_handle();
gctl_ro_param(grq, "class", -1, "PART");
gctl_ro_param(grq, "geom", -1, pname);
gctl_ro_param(grq, "verb", -1, "bootcode");
gctl_ro_param(grq, "bootcode", mbr_size, mbr);
gctl_ro_param(grq, "flags", -1, "C");
errmsg = gctl_issue(grq);
if (errmsg == NULL)
goto out;
grq = gctl_get_handle();
gctl_ro_param(grq, "verb", -1, "write MBR");
gctl_ro_param(grq, "class", -1, "MBR");
gctl_ro_param(grq, "geom", -1, pname);
gctl_ro_param(grq, "data", mbr_size, mbr);
errmsg = gctl_issue(grq);
if (errmsg == NULL) {
free(pname);
return;
}
warnx("%s: %s", fname, pname);
if (errmsg != NULL)
err(1, "write_mbr: %s", fname);
out:
free(pname);
gctl_free(grq);
#ifdef DIOCSMBR
for (p = 1; p < 5; p++) {
asprintf(&s, "%ss%d", fname, p);
fd = open(s, O_RDONLY);
if (fd < 0) {
free(s);
continue;
}
n = ioctl(fd, DIOCSMBR, (mbr));
if (n != 0)
err(1, "%s: ioctl DIOCSMBR", fname);
close(fd);
free(s);
return;
}
#endif
err(1, "write_mbr: %s", fname);
}
/*