src/udev/udev-builtin.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2007-2012 Kay Sievers <kay@vrfy.org>
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <unistd.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <stddef.h>
  24 #include <string.h>
  25 #include <errno.h>
  26 #include <getopt.h>
  27
  28 #include "udev.h"
  29
  30 static bool initialized;
  31
  32 static const struct udev_builtin *builtins[] = {
  33 #ifdef HAVE_BLKID
  34         [UDEV_BUILTIN_BLKID] = &udev_builtin_blkid,
  35 #endif
  36         [UDEV_BUILTIN_BTRFS] = &udev_builtin_btrfs,
  37         [UDEV_BUILTIN_HWDB] = &udev_builtin_hwdb,
  38         [UDEV_BUILTIN_INPUT_ID] = &udev_builtin_input_id,
  39         [UDEV_BUILTIN_KEYBOARD] = &udev_builtin_keyboard,
  40 #ifdef HAVE_KMOD
  41         [UDEV_BUILTIN_KMOD] = &udev_builtin_kmod,
  42 #endif
  43         [UDEV_BUILTIN_NET_ID] = &udev_builtin_net_id,
  44         [UDEV_BUILTIN_NET_LINK] = &udev_builtin_net_setup_link,
  45         [UDEV_BUILTIN_PATH_ID] = &udev_builtin_path_id,
  46         [UDEV_BUILTIN_USB_ID] = &udev_builtin_usb_id,
  47 #ifdef HAVE_ACL
  48         [UDEV_BUILTIN_UACCESS] = &udev_builtin_uaccess,
  49 #endif
  50 };
  51
  52 void udev_builtin_init(struct udev *udev) {
  53         unsigned int i;
  54
  55         if (initialized)
  56                 return;
  57
  58         for (i = 0; i < ELEMENTSOF(builtins); i++)
  59                 if (builtins[i]->init)
  60                         builtins[i]->init(udev);
  61
  62         initialized = true;
  63 }
  64
  65 void udev_builtin_exit(struct udev *udev) {
  66         unsigned int i;
  67
  68         if (!initialized)
  69                 return;
  70
  71         for (i = 0; i < ELEMENTSOF(builtins); i++)
  72                 if (builtins[i]->exit)
  73                         builtins[i]->exit(udev);
  74
  75         initialized = false;
  76 }
  77
  78 bool udev_builtin_validate(struct udev *udev) {
  79         unsigned int i;
  80
  81         for (i = 0; i < ELEMENTSOF(builtins); i++)
  82                 if (builtins[i]->validate && builtins[i]->validate(udev))
  83                         return true;
  84         return false;
  85 }
  86
  87 void udev_builtin_list(struct udev *udev) {
  88         unsigned int i;
  89
  90         for (i = 0; i < ELEMENTSOF(builtins); i++)
  91                 fprintf(stderr, "  %-12s %s\n", builtins[i]->name, builtins[i]->help);
  92 }
  93
  94 const char *udev_builtin_name(enum udev_builtin_cmd cmd) {
  95         return builtins[cmd]->name;
  96 }
  97
  98 bool udev_builtin_run_once(enum udev_builtin_cmd cmd) {
  99         return builtins[cmd]->run_once;
 100 }
 101
 102 enum udev_builtin_cmd udev_builtin_lookup(const char *command) {
 103         char name[UTIL_PATH_SIZE];
 104         enum udev_builtin_cmd i;
 105         char *pos;
 106
 107         strscpy(name, sizeof(name), command);
 108         pos = strchr(name, ' ');
 109         if (pos)
 110                 pos[0] = '\0';
 111         for (i = 0; i < ELEMENTSOF(builtins); i++)
 112                 if (streq(builtins[i]->name, name))
 113                         return i;
 114         return UDEV_BUILTIN_MAX;
 115 }
 116
 117 int udev_builtin_run(struct udev_device *dev, enum udev_builtin_cmd cmd, const char *command, bool test) {
 118         char arg[UTIL_PATH_SIZE];
 119         int argc;
 120         char *argv[128];
 121
 122         /* we need '0' here to reset the internal state */
 123         optind = 0;
 124         strscpy(arg, sizeof(arg), command);
 125         udev_build_argv(udev_device_get_udev(dev), arg, &argc, argv);
 126         return builtins[cmd]->cmd(dev, argc, argv, test);
 127 }
 128
 129 int udev_builtin_add_property(struct udev_device *dev, bool test, const char *key, const char *val) {
 130         struct udev_list_entry *entry;
 131
 132         entry = udev_device_add_property(dev, key, val);
 133         /* store in db, skip private keys */
 134         if (key[0] != '.')
 135                 udev_list_entry_set_num(entry, true);
 136
 137         if (test)
 138                 printf("%s=%s\n", key, val);
 139         return 0;
 140 }