void
db_dmesg(db_expr_t addr, bool haddr, db_expr_t count, const char *modif)
{
struct kern_msgbuf mb, *mbp;
db_expr_t print;
int newl, skip, i;
char *p, *bufdata, ch;
if (!db_read_int("msgbufenabled")) {
db_printf("message buffer not available\n");
return;
}
mbp = (struct kern_msgbuf *)db_read_ptr("msgbufp");
db_read_bytes((db_addr_t)mbp, sizeof(mb), (char *)&mb);
if (mb.msg_magic != MSG_MAGIC) {
db_printf("message buffer not available\n");
return;
}
bufdata = &mbp->msg_bufc[0];
if (haddr && addr < mb.msg_bufs)
print = addr;
else
print = mb.msg_bufs;
for (newl = skip = i = 0, p = bufdata + mb.msg_bufx;
i < mb.msg_bufs; i++, p++) {
if (p == bufdata + mb.msg_bufs)
p = bufdata;
if (i < mb.msg_bufs - print) {
continue;
}
db_read_bytes((db_addr_t)p, sizeof(ch), &ch);
/* Skip "\n<.*>" syslog sequences. */
if (skip) {
if (ch == '>')
newl = skip = 0;
continue;
}
if (newl && ch == '<') {
skip = 1;
continue;
}
if (ch == '\0')
continue;
newl = ch == '\n';
db_printf("%c", ch);
}
if (!newl)
db_printf("\n");
}
int
db_sread_int(database_handle_t *db)
{
int r;
bool ok = db_read_int(db, &r);
if (!ok)
{
slog(LG_ERROR, "db-read-int: needed int at file %s line %d token %d", db->file, db->line, db->token);
slog(LG_ERROR, "db-read-int: exiting to avoid data loss");
exit(EXIT_FAILURE);
}
return r;
}
