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#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <getopt.h>
#include <library.h>
#include <readline/readline.h>
#include <readline/history.h>
#include "dumm.h"
/**
* show usage information (program arguments)
*/
static void usage()
{
printf("Usage:\n");
printf(" --dir|-d <path> set working dir to <path>\n");
printf(" --help|-h show this help\n");
}
/**
* show usage information (commandline arguments)
*/
static void help()
{
printf("start name=<name> [options] start a guest named <name>\n");
printf(" additional options:\n");
printf(" kernel=<uml-kernel>\n");
printf(" master=<read-only root files>\n");
printf(" memory=<guest memory in MB>\n");
printf("guests list running guests\n");
printf("help show this help\n");
printf("quit kill quests and exit\n");
}
/**
* start an UML guest
*/
static void start(umli_t *umli, char *line)
{
enum {
NAME = 0,
MASTER,
KERNEL,
MEMORY,
};
char *const opts[] = {
[NAME] = "name",
[MASTER] = "master",
[KERNEL] = "kernel",
[MEMORY] = "memory",
NULL
};
char *value;
char *name = NULL;
char *kernel = NULL;
char *master = NULL;
int mem = 0;
while (TRUE)
{
switch (getsubopt(&line, opts, &value))
{
case NAME:
name = value;
continue;
case MASTER:
master = value;
continue;
case KERNEL:
kernel = value;
continue;
case MEMORY:
if (value)
{
mem = atoi(value);
}
continue;
default:
break;
}
break;
}
if (name == NULL)
{
printf("option 'name' is required.\n");
help();
return;
}
if (kernel == NULL)
{
kernel = "./linux";
}
if (master == NULL)
{
master = "master";
}
if (mem == 0)
{
mem = 128;
}
if (umli->start_guest(umli, name, kernel, master, mem))
{
printf("starting guest '%s'\n", name);
}
else
{
printf("starting guest '%s' failed\n", name);
}
}
/**
* list running UML guests
*/
static void guests(umli_t *umli)
{
iterator_t *iterator;
guest_t *guest;
iterator = umli->create_guest_iterator(umli);
while (iterator->iterate(iterator, (void**)&guest))
{
printf("%s\n", guest->get_name(guest));
}
iterator->destroy(iterator);
}
/**
* main routine, parses args and reads from console
*/
int main(int argc, char *argv[])
{
umli_t *umli;
char *line = NULL;
while (TRUE)
{
struct option options[] = {
{"dir", 1, 0, 0},
{"help", 0, 0, 0},
{0, 0, 0, 0}
};
switch (getopt_long(argc, argv, "d:h", options, NULL))
{
case -1:
break;
case 'd':
if (chdir(optarg))
{
printf("changing to directory '%s' failed.\n", optarg);
return 1;
}
continue;
case 'h':
usage();
return 0;
default:
usage();
return 1;
}
break;
}
umli = umli_create();
while (TRUE)
{
enum {
QUIT = 0,
HELP,
START,
GUESTS,
};
char *const opts[] = {
[QUIT] = "quit",
[HELP] = "help",
[START] = "start",
[GUESTS] = "guests",
NULL
};
char *pos, *value;
free(line);
line = readline("dumm# ");
if (line == NULL || *line == '\0')
{
continue;
}
add_history(line);
pos = line;
while (*pos != '\0')
{
if (*pos == ' ')
{
*pos = ',';
}
pos++;
}
pos = line;
switch (getsubopt(&pos, opts, &value))
{
case QUIT:
free(line);
break;
case HELP:
help();
continue;
case START:
start(umli, pos);
continue;
case GUESTS:
guests(umli);
continue;
default:
printf("command unknown: '%s'\n", line);
continue;
}
break;
}
umli->destroy(umli);
clear_history();
return 0;
}
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