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 <getopt.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 #include "string-util.h"
  25 #include "udev.h"
  26
  27 static bool initialized;
  28
  29 static const struct udev_builtin *builtins[] = {
  30 #ifdef HAVE_BLKID
  31         [UDEV_BUILTIN_BLKID] = &udev_builtin_blkid,
  32 #endif
  33         [UDEV_BUILTIN_BTRFS] = &udev_builtin_btrfs,
  34         [UDEV_BUILTIN_HWDB] = &udev_builtin_hwdb,
  35         [UDEV_BUILTIN_INPUT_ID] = &udev_builtin_input_id,
  36         [UDEV_BUILTIN_KEYBOARD] = &udev_builtin_keyboard,
  37 #ifdef HAVE_KMOD
  38         [UDEV_BUILTIN_KMOD] = &udev_builtin_kmod,
  39 #endif
  40         [UDEV_BUILTIN_NET_ID] = &udev_builtin_net_id,
  41         [UDEV_BUILTIN_NET_LINK] = &udev_builtin_net_setup_link,
  42         [UDEV_BUILTIN_PATH_ID] = &udev_builtin_path_id,
  43         [UDEV_BUILTIN_USB_ID] = &udev_builtin_usb_id,
  44 #ifdef HAVE_ACL
  45         [UDEV_BUILTIN_UACCESS] = &udev_builtin_uaccess,
  46 #endif
  47 };
  48
  49 void udev_builtin_init(struct udev *udev) {
  50         unsigned int i;
  51
  52         if (initialized)
  53                 return;
  54
  55         for (i = 0; i < ELEMENTSOF(builtins); i++)
  56                 if (builtins[i] && builtins[i]->init)
  57                         builtins[i]->init(udev);
  58
  59         initialized = true;
  60 }
  61
  62 void udev_builtin_exit(struct udev *udev) {
  63         unsigned int i;
  64
  65         if (!initialized)
  66                 return;
  67
  68         for (i = 0; i < ELEMENTSOF(builtins); i++)
  69                 if (builtins[i] && builtins[i]->exit)
  70                         builtins[i]->exit(udev);
  71
  72         initialized = false;
  73 }
  74
  75 bool udev_builtin_validate(struct udev *udev) {
  76         unsigned int i;
  77
  78         for (i = 0; i < ELEMENTSOF(builtins); i++)
  79                 if (builtins[i] && builtins[i]->validate && builtins[i]->validate(udev))
  80                         return true;
  81         return false;
  82 }
  83
  84 void udev_builtin_list(struct udev *udev) {
  85         unsigned int i;
  86
  87         for (i = 0; i < ELEMENTSOF(builtins); i++)
  88                 if (builtins[i])
  89                         fprintf(stderr, "  %-14s  %s\n", builtins[i]->name, builtins[i]->help);
  90 }
  91
  92 const char *udev_builtin_name(enum udev_builtin_cmd cmd) {
  93         if (!builtins[cmd])
  94                 return NULL;
  95
  96         return builtins[cmd]->name;
  97 }
  98
  99 bool udev_builtin_run_once(enum udev_builtin_cmd cmd) {
 100         if (!builtins[cmd])
 101                 return false;
 102
 103         return builtins[cmd]->run_once;
 104 }
 105
 106 enum udev_builtin_cmd udev_builtin_lookup(const char *command) {
 107         char name[UTIL_PATH_SIZE];
 108         enum udev_builtin_cmd i;
 109         char *pos;
 110
 111         strscpy(name, sizeof(name), command);
 112         pos = strchr(name, ' ');
 113         if (pos)
 114                 pos[0] = '\0';
 115         for (i = 0; i < ELEMENTSOF(builtins); i++)
 116                 if (builtins[i] && streq(builtins[i]->name, name))
 117                         return i;
 118         return UDEV_BUILTIN_MAX;
 119 }
 120
 121 int udev_builtin_run(struct udev_device *dev, enum udev_builtin_cmd cmd, const char *command, bool test) {
 122         char arg[UTIL_PATH_SIZE];
 123         int argc;
 124         char *argv[128];
 125
 126         if (!builtins[cmd])
 127                 return -EOPNOTSUPP;
 128
 129         /* we need '0' here to reset the internal state */
 130         optind = 0;
 131         strscpy(arg, sizeof(arg), command);
 132         udev_build_argv(udev_device_get_udev(dev), arg, &argc, argv);
 133         return builtins[cmd]->cmd(dev, argc, argv, test);
 134 }
 135
 136 int udev_builtin_add_property(struct udev_device *dev, bool test, const char *key, const char *val) {
 137         udev_device_add_property(dev, key, val);
 138
 139         if (test)
 140                 printf("%s=%s\n", key, val);
 141         return 0;
 142 }