1/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2/* dbus-uuidgen.c  Utility program to create UUIDs
3 *
4 * Copyright (C) 2006 Red Hat, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
19 *
20 */
21
22#include <config.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <string.h>
26
27#include <dbus/dbus-uuidgen.h>
28#include <dbus/dbus.h>
29
30static void
31usage (char *name, int ecode)
32{
33  if (name == NULL)
34    name = "dbus-uuidgen";
35
36  fprintf (stderr, "Usage: %s [--ensure[=FILENAME]] [--get[=FILENAME]]\n", name);
37  exit (ecode);
38}
39
40static void
41version (void)
42{
43  printf ("D-Bus UUID Generator %s\n"
44          "Copyright (C) 2006 Red Hat, Inc.\n"
45          "This is free software; see the source for copying conditions.\n"
46          "There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
47          VERSION);
48  exit (0);
49}
50
51static dbus_bool_t
52get_arg (const char  *arg,
53         const char  *option,
54         const char **value_p)
55{
56  const char *fn;
57
58  if (strlen(arg) < strlen(option))
59    return FALSE;
60
61  fn = arg + strlen(option);
62
63  if (!(*fn == '=' || *fn == ' ' || *fn == '\0'))
64    {
65      usage (NULL, 1);
66    }
67
68  if (*fn == '=')
69    ++fn;
70
71  while (*fn == ' ' && *fn != '\0')
72    ++fn;
73
74  if (*fn != '\0')
75    {
76      *value_p = fn;
77      return TRUE;
78    }
79
80  return FALSE;
81}
82
83int
84main (int argc, char *argv[])
85{
86  int i;
87  const char *filename;
88  dbus_bool_t ensure_uuid;
89  dbus_bool_t get_uuid;
90  DBusError error;
91
92  ensure_uuid = FALSE;
93  get_uuid = FALSE;
94
95  filename = NULL;
96
97  for (i = 1; i < argc; i++)
98    {
99      char *arg = argv[i];
100
101      if (strncmp (arg, "--ensure", strlen("--ensure")) == 0)
102        {
103          get_arg (arg, "--ensure", &filename);
104          ensure_uuid = TRUE;
105        }
106      else if (strncmp (arg, "--get", strlen("--get")) == 0)
107        {
108          get_arg (arg, "--get", &filename);
109          get_uuid = TRUE;
110        }
111      else if (strcmp (arg, "--help") == 0)
112	usage (argv[0], 0);
113      else if (strcmp (arg, "--version") == 0)
114        version ();
115      else
116        usage (argv[0], 1);
117    }
118
119  if (get_uuid && ensure_uuid)
120    {
121      fprintf (stderr, "Can't specify both --get and --ensure\n");
122      exit (1);
123    }
124
125  dbus_error_init (&error);
126
127  if (get_uuid || ensure_uuid)
128    {
129      char *uuid;
130      if (dbus_internal_do_not_use_get_uuid (filename, &uuid, ensure_uuid, &error))
131        {
132          if (get_uuid) /* print nothing on --ensure */
133            printf ("%s\n", uuid);
134          dbus_free (uuid);
135        }
136    }
137  else
138    {
139      char *uuid;
140      if (dbus_internal_do_not_use_create_uuid (&uuid))
141        {
142          printf ("%s\n", uuid);
143          dbus_free (uuid);
144        }
145      else
146        {
147          dbus_set_error (&error, DBUS_ERROR_NO_MEMORY, "No memory");
148        }
149    }
150
151  if (dbus_error_is_set (&error))
152    {
153      fprintf (stderr, "%s\n", error.message);
154      dbus_error_free (&error);
155      exit (1);
156    }
157  else
158    {
159      exit (0);
160    }
161}
162