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/* guestfish - the filesystem interactive shell
* Copyright (C) 2010 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include "fish.h"
#include "prepopts.h"
static prep_data *parse_type_string (const char *type_string);
void
list_prepared_drives (void)
{
size_t i, j;
printf (_("List of available prepared disk images:\n\n"));
for (i = 0; i < NR_PREPS; ++i) {
printf (_("\
guestfish -N %-8s - %s\n\
\n\
%s\n"),
preps[i].name, preps[i].shortdesc, preps[i].longdesc);
if (preps[i].nr_params > 0) {
printf ("\n");
printf (_(" Optional parameters:\n"));
printf (" -N %s", preps[i].name);
for (j = 0; j < preps[i].nr_params; ++j)
printf (":<%s>", preps[i].params[j].pname);
printf ("\n");
for (j = 0; j < preps[i].nr_params; ++j) {
printf (" ");
printf (_("<%s> %s (default: %s)\n"),
preps[i].params[j].pname,
preps[i].params[j].pdesc,
preps[i].params[j].pdefault);
}
}
printf ("\n");
}
printf (_("\
Prepared disk images are written to file \"test1.img\" in the local\n\
directory. (\"test2.img\" etc if -N option is given multiple times).\n\
For more information see the guestfish(1) manual.\n"));
}
/* Parse the type string (from the command line) and create the output
* file 'filename'. This is called before launch. Return the opaque
* prep_data which will be passed back to us in prepare_drive below.
*/
prep_data *
create_prepared_file (const char *type_string, const char *filename)
{
prep_data *data = parse_type_string (type_string);
if (data->prep->prelaunch)
data->prep->prelaunch (filename, data);
return data;
}
static prep_data *
parse_type_string (const char *type_string)
{
size_t i;
/* Match on the type part (without parameters). */
size_t len = strcspn (type_string, ":");
for (i = 0; i < NR_PREPS; ++i)
if (STRCASEEQLEN (type_string, preps[i].name, len))
break;
if (i == NR_PREPS) {
fprintf (stderr, _("\
guestfish: -N parameter '%s': no such prepared disk image known.\n\
Use 'guestfish -N help' to list possible values for the -N parameter.\n"),
type_string);
exit (EXIT_FAILURE);
}
prep_data *data = malloc (sizeof *data);
if (data == NULL) {
perror ("malloc");
exit (EXIT_FAILURE);
}
data->prep = &preps[i];
data->orig_type_string = type_string;
/* Set up the optional parameters to all-defaults. */
data->params = malloc (data->prep->nr_params * sizeof (char *));
if (data->params == NULL) {
perror ("malloc");
exit (EXIT_FAILURE);
}
for (i = 0; i < data->prep->nr_params; ++i)
data->params[i] = bad_cast (data->prep->params[i].pdefault);
/* Parse the optional parameters. */
const char *p = type_string + len;
if (*p) p++; /* skip colon char */
i = 0;
while (*p) {
len = strcspn (p, ":");
data->params[i] = strndup (p, len);
if (data->params[i] == NULL) {
perror ("strndup");
exit (EXIT_FAILURE);
}
p += len;
if (*p) p++; /* skip colon char */
i++;
}
return data;
}
/* Prepare a drive. The appliance has been launched, and 'device' is
* the libguestfs device. 'data' is the requested type. 'filename'
* is just used for error messages.
*/
void
prepare_drive (const char *filename, prep_data *data,
const char *device)
{
if (data->prep->postlaunch)
data->prep->postlaunch (filename, data, device);
}
void
prep_error (prep_data *data, const char *filename, const char *fs, ...)
{
fprintf (stderr,
_("guestfish: error creating prepared disk image '%s' on '%s': "),
data->orig_type_string, filename);
va_list args;
va_start (args, fs);
vfprintf (stderr, fs, args);
va_end (args);
fprintf (stderr, "\n");
exit (EXIT_FAILURE);
}
void
free_prep_data (void *vp)
{
prep_data *data = vp;
size_t i;
for (i = 0; i < data->prep->nr_params; ++i)
if (data->params[i] != data->prep->params[i].pdefault)
free (data->params[i]);
free (data->params);
free (data);
}
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