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         [UDEV_BUILTIN_EVDEV_ID] = &udev_builtin_evdev_id,
  51 };
  52
  53 void udev_builtin_init(struct udev *udev) {
  54         unsigned int i;
  55
  56         if (initialized)
  57                 return;
  58
  59         for (i = 0; i < ELEMENTSOF(builtins); i++)
  60                 if (builtins[i]->init)
  61                         builtins[i]->init(udev);
  62
  63         initialized = true;
  64 }
  65
  66 void udev_builtin_exit(struct udev *udev) {
  67         unsigned int i;
  68
  69         if (!initialized)
  70                 return;
  71
  72         for (i = 0; i < ELEMENTSOF(builtins); i++)
  73                 if (builtins[i]->exit)
  74                         builtins[i]->exit(udev);
  75
  76         initialized = false;
  77 }
  78
  79 bool udev_builtin_validate(struct udev *udev) {
  80         unsigned int i;
  81
  82         for (i = 0; i < ELEMENTSOF(builtins); i++)
  83                 if (builtins[i]->validate && builtins[i]->validate(udev))
  84                         return true;
  85         return false;
  86 }
  87
  88 void udev_builtin_list(struct udev *udev) {
  89         unsigned int i;
  90
  91         for (i = 0; i < ELEMENTSOF(builtins); i++)
  92                 fprintf(stderr, "  %-14s  %s\n", builtins[i]->name, builtins[i]->help);
  93 }
  94
  95 const char *udev_builtin_name(enum udev_builtin_cmd cmd) {
  96         return builtins[cmd]->name;
  97 }
  98
  99 bool udev_builtin_run_once(enum udev_builtin_cmd cmd) {
 100         return builtins[cmd]->run_once;
 101 }
 102
 103 enum udev_builtin_cmd udev_builtin_lookup(const char *command) {
 104         char name[UTIL_PATH_SIZE];
 105         enum udev_builtin_cmd i;
 106         char *pos;
 107
 108         strscpy(name, sizeof(name), command);
 109         pos = strchr(name, ' ');
 110         if (pos)
 111                 pos[0] = '\0';
 112         for (i = 0; i < ELEMENTSOF(builtins); i++)
 113                 if (streq(builtins[i]->name, name))
 114                         return i;
 115         return UDEV_BUILTIN_MAX;
 116 }
 117
 118 int udev_builtin_run(struct udev_device *dev, enum udev_builtin_cmd cmd, const char *command, bool test) {
 119         char arg[UTIL_PATH_SIZE];
 120         int argc;
 121         char *argv[128];
 122
 123         /* we need '0' here to reset the internal state */
 124         optind = 0;
 125         strscpy(arg, sizeof(arg), command);
 126         udev_build_argv(udev_device_get_udev(dev), arg, &argc, argv);
 127         return builtins[cmd]->cmd(dev, argc, argv, test);
 128 }
 129
 130 int udev_builtin_add_property(struct udev_device *dev, bool test, const char *key, const char *val) {
 131         struct udev_list_entry *entry;
 132
 133         entry = udev_device_add_property(dev, key, val);
 134         /* store in db, skip private keys */
 135         if (key[0] != '.')
 136                 udev_list_entry_set_num(entry, true);
 137
 138         if (test)
 139                 printf("%s=%s\n", key, val);
 140         return 0;
 141 }