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#include <argp.h>
#include <error.h>
#include <unistd.h>
#include <hurd.h>
#include <sys/fcntl.h>
#include "store.h"
struct argp_option options[] = {
{0}
};
char *arg_doc = "FILE [ADDR [LENGTH]]...";
char *doc = "ADDR is in blocks, and defaults to 0; LENGTH is in bytes, and defaults to the remainder of FILE.";
int
main (int argc, char **argv)
{
struct store *store = 0;
off_t addr = -1;
int dumped = 0;
void dump (ssize_t addr, size_t len)
{
char buf[4096], *data = buf;
size_t data_len = sizeof (buf);
error_t err =
store_read (store, addr, len < 0 ? store->size : len,
&data, &data_len);
if (err)
error (5, err, store->name ? "%s" : "<store>", store->name);
if (write (1, data, data_len) <= 0)
error (6, errno, "stdout");
if (data != buf)
vm_deallocate (mach_task_self (), (vm_address_t)data, data_len);
}
error_t parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case ARGP_KEY_ARG:
if (! store)
{
error_t err;
file_t source = file_name_lookup (arg, O_READ, 0);
if (errno)
error (2, errno, "%s", arg);
err = store_create (source, &store);
if (err)
error (err, 3, "%s", arg);
mach_port_deallocate (mach_task_self (), source);
}
else if (addr < 0)
addr = atoi (arg);
else
{
dump (addr, atoi (arg));
dumped = 1;
addr = -1;
}
break;
case ARGP_KEY_END:
if (addr < 0)
dump (0, -1);
else if (! dumped)
dump (addr, -1);
break;
case ARGP_KEY_NO_ARGS:
default:
return EINVAL;
}
return 0;
}
struct argp argp = {options, parse_opt, arg_doc, doc};
argp_parse (&argp, argc, argv, 0, 0);
exit (0);
}
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