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         [UDEV_BUILTIN_BLKID] = &udev_builtin_blkid,
  34         [UDEV_BUILTIN_BTRFS] = &udev_builtin_btrfs,
  35         [UDEV_BUILTIN_FIRMWARE] = &udev_builtin_firmware,
  36         [UDEV_BUILTIN_HWDB] = &udev_builtin_hwdb,
  37         [UDEV_BUILTIN_INPUT_ID] = &udev_builtin_input_id,
  38         [UDEV_BUILTIN_KMOD] = &udev_builtin_kmod,
  39         [UDEV_BUILTIN_NET_ID] = &udev_builtin_net_id,
  40         [UDEV_BUILTIN_PATH_ID] = &udev_builtin_path_id,
  41         [UDEV_BUILTIN_USB_ID] = &udev_builtin_usb_id,
  42 #ifdef HAVE_ACL
  43         [UDEV_BUILTIN_UACCESS] = &udev_builtin_uaccess,
  44 #endif
  45 };
  46
  47 void udev_builtin_init(struct udev *udev)
  48 {
  49         unsigned int i;
  50
  51         if (initialized)
  52                 return;
  53
  54         for (i = 0; i < ELEMENTSOF(builtins); i++)
  55                 if (builtins[i]->init)
  56                         builtins[i]->init(udev);
  57
  58         initialized = true;
  59 }
  60
  61 void udev_builtin_exit(struct udev *udev)
  62 {
  63         unsigned int i;
  64
  65         if (!initialized)
  66                 return;
  67
  68         for (i = 0; i < ELEMENTSOF(builtins); i++)
  69                 if (builtins[i]->exit)
  70                         builtins[i]->exit(udev);
  71
  72         initialized = false;
  73 }
  74
  75 bool udev_builtin_validate(struct udev *udev)
  76 {
  77         unsigned int i;
  78
  79         for (i = 0; i < ELEMENTSOF(builtins); i++)
  80                 if (builtins[i]->validate && builtins[i]->validate(udev))
  81                         return true;
  82         return false;
  83 }
  84
  85 void udev_builtin_list(struct udev *udev)
  86 {
  87         unsigned int i;
  88
  89         for (i = 0; i < ELEMENTSOF(builtins); i++)
  90                 fprintf(stderr, "  %-12s %s\n", builtins[i]->name, builtins[i]->help);
  91 }
  92
  93 const char *udev_builtin_name(enum udev_builtin_cmd cmd)
  94 {
  95         return builtins[cmd]->name;
  96 }
  97
  98 bool udev_builtin_run_once(enum udev_builtin_cmd cmd)
  99 {
 100         return builtins[cmd]->run_once;
 101 }
 102
 103 enum udev_builtin_cmd udev_builtin_lookup(const char *command)
 104 {
 105         char name[UTIL_PATH_SIZE];
 106         enum udev_builtin_cmd i;
 107         char *pos;
 108
 109         util_strscpy(name, sizeof(name), command);
 110         pos = strchr(name, ' ');
 111         if (pos)
 112                 pos[0] = '\0';
 113         for (i = 0; i < ELEMENTSOF(builtins); i++)
 114                 if (strcmp(builtins[i]->name, name) == 0)
 115                         return i;
 116         return UDEV_BUILTIN_MAX;
 117 }
 118
 119 int udev_builtin_run(struct udev_device *dev, enum udev_builtin_cmd cmd, const char *command, bool test)
 120 {
 121         char arg[UTIL_PATH_SIZE];
 122         int argc;
 123         char *argv[128];
 124
 125         /* we need '0' here to reset the internal state */
 126         optind = 0;
 127         util_strscpy(arg, sizeof(arg), command);
 128         udev_build_argv(udev_device_get_udev(dev), arg, &argc, argv);
 129         return builtins[cmd]->cmd(dev, argc, argv, test);
 130 }
 131
 132 int udev_builtin_add_property(struct udev_device *dev, bool test, const char *key, const char *val)
 133 {
 134         struct udev_list_entry *entry;
 135
 136         entry = udev_device_add_property(dev, key, val);
 137         /* store in db, skip private keys */
 138         if (key[0] != '.')
 139                 udev_list_entry_set_num(entry, true);
 140
 141         if (test)
 142                 printf("%s=%s\n", key, val);
 143         return 0;
 144 }