bthid/xkbdbthidwrapper/xkbdbthidwrapper.c

   1 /*
   2  *  xkbd-bthid-wrapper (for Nokia770)
   3  *
   4  *  (c) Collin R. Mulliner <collin@betaversion.net>
   5  *  http://www.mulliner.org/nokia770/
   6  *
   7  *  License: GPL
   8  *
   9  */
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <unistd.h>
  14
  15 #define USAGE "\nxkbd-bthid-wrapper is wrapper for xkbd-bthid\n"\
  16               " it reconfigures the hci0 device to be usable as a keyboard\n"\
  17               " and also starts the sdpd service, to do this it needs to run with\n"\
  18               " root privileges. these will be dropped before executing xkbd-bthid\n"\
  19               " also the hci0 settings will be reverted to default values on exit\n"
  20
  21 int main(int argc, char **argv)
  22 {
  23         int pid, status;
  24
  25         if (geteuid() != 0) {
  26                 fprintf(stderr, "%s: needs root privileges\n", argv[0]);
  27                 fprintf(stderr, USAGE);
  28                 exit(-1);
  29         }
  30         else {
  31                 if ((pid = fork())) {
  32                         waitpid(pid, &status, 0);
  33                 }
  34                 else {
  35                         execl("/usr/sbin/hciconfig", "hciconfig", "hci0", "piscan");
  36                 }
  37                 if ((pid = fork())) {
  38                         waitpid(pid, &status, 0);
  39                 }
  40                 else {
  41                         execl("/usr/sbin/hciconfig", "hciconfig", "hci0", "class", "0x002540");
  42                 }
  43                 if ((pid = fork())) {
  44                         waitpid(pid, &status, 0);
  45                 }
  46                 else {
  47                         execl("/usr/sbin/sdpd", "sdpd");
  48                 }
  49
  50                 if ((pid = fork())) {
  51                         waitpid(pid, &status, 0);
  52
  53                         if ((pid = fork())) {
  54                                 waitpid(pid, &status, 0);
  55                         }
  56                         else {
  57                                 execl("/usr/sbin/hciconfig", "hciconfig", "hci0", "pscan");
  58                         }
  59                         if ((pid = fork())) {
  60                                 waitpid(pid, &status, 0);
  61                         }
  62                         else {
  63                                 execl("/usr/sbin/hciconfig", "hciconfig", "hci0", "class", "0x00100");
  64                         }
  65                 }
  66                 else {
  67                         setegid(getgid());
  68                         seteuid(getuid());
  69                         execl("/var/lib/install/usr/bin/xkbdbthid", "xkbdbthid", argv[1], argv[2]);
  70                         exit(0);
  71                 }
  72         }
  73 }