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_FIRMWARE] = &udev_builtin_firmware,
  38         [UDEV_BUILTIN_HWDB] = &udev_builtin_hwdb,
  39         [UDEV_BUILTIN_INPUT_ID] = &udev_builtin_input_id,
  40         [UDEV_BUILTIN_KMOD] = &udev_builtin_kmod,
  41         [UDEV_BUILTIN_NET_ID] = &udev_builtin_net_id,
  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 {
  51         unsigned int i;
  52
  53         if (initialized)
  54                 return;
  55
  56         for (i = 0; i < ELEMENTSOF(builtins); i++)
  57                 if (builtins[i]->init)
  58                         builtins[i]->init(udev);
  59
  60         initialized = true;
  61 }
  62
  63 void udev_builtin_exit(struct udev *udev)
  64 {
  65         unsigned int i;
  66
  67         if (!initialized)
  68                 return;
  69
  70         for (i = 0; i < ELEMENTSOF(builtins); i++)
  71                 if (builtins[i]->exit)
  72                         builtins[i]->exit(udev);
  73
  74         initialized = false;
  75 }
  76
  77 bool udev_builtin_validate(struct udev *udev)
  78 {
  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 {
  89         unsigned int i;
  90
  91         for (i = 0; i < ELEMENTSOF(builtins); i++)
  92                 fprintf(stderr, "  %-12s %s\n", builtins[i]->name, builtins[i]->help);
  93 }
  94
  95 const char *udev_builtin_name(enum udev_builtin_cmd cmd)
  96 {
  97         return builtins[cmd]->name;
  98 }
  99
 100 bool udev_builtin_run_once(enum udev_builtin_cmd cmd)
 101 {
 102         return builtins[cmd]->run_once;
 103 }
 104
 105 enum udev_builtin_cmd udev_builtin_lookup(const char *command)
 106 {
 107         char name[UTIL_PATH_SIZE];
 108         enum udev_builtin_cmd i;
 109         char *pos;
 110
 111         util_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 (strcmp(builtins[i]->name, name) == 0)
 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 {
 123         char arg[UTIL_PATH_SIZE];
 124         int argc;
 125         char *argv[128];
 126
 127         /* we need '0' here to reset the internal state */
 128         optind = 0;
 129         util_strscpy(arg, sizeof(arg), command);
 130         udev_build_argv(udev_device_get_udev(dev), arg, &argc, argv);
 131         return builtins[cmd]->cmd(dev, argc, argv, test);
 132 }
 133
 134 int udev_builtin_add_property(struct udev_device *dev, bool test, const char *key, const char *val)
 135 {
 136         struct udev_list_entry *entry;
 137
 138         entry = udev_device_add_property(dev, key, val);
 139         /* store in db, skip private keys */
 140         if (key[0] != '.')
 141                 udev_list_entry_set_num(entry, true);
 142
 143         if (test)
 144                 printf("%s=%s\n", key, val);
 145         return 0;
 146 }