components/desktop/lightdm/patches/13-save-audio-settings.patch

   1 --- lightdm-1.19.3/src/session-child.c.~6~      2016-08-12 20:29:20.896781907 +0300
   2 +++ lightdm-1.19.3/src/session-child.c  2016-08-12 20:34:18.800499967 +0300
   3 @@ -17,6 +17,7 @@
   4  #include <utmp.h>
   5  #include <utmpx.h>
   6  #include <sys/mman.h>
   7 +#include <sys/soundcard.h>
   8
   9  #if HAVE_LIBAUDIT
  10  #include <libaudit.h>
  11 @@ -32,6 +33,8 @@
  12  #include "x-authority.h"
  13  #include "configuration.h"
  14
  15 +#define MAX_HOSTNAME 256
  16 +
  17  /* Child process being run */
  18  static GPid child_pid = 0;
  19
  20 @@ -113,6 +113,82 @@
  21       privileges_reclaim ();
  22  }
  23
  24 +/*
  25 +   /usr/bin/audioctl save-controls -d $AUDIOCTL_SAVE_DEVICE  \
  26 +         -f $AUDIOCTL_SAVE_DIR/audioctl-$AUDIOCTL_SAVE_HOSTNAME-$AUDIOCTL_SAVE_DEVICE
  27 +*/
  28 +#define AUDIO_SETTINGS_SAVE "/usr/bin/audioctl save-controls -d %s -f \"%s/audioctl-%s-%s\""
  29 +
  30 +static void
  31 +save_audio_settings(User *user)
  32 +{
  33 +    char hostname[MAX_HOSTNAME];
  34 +    char *user_name,*save_dir;
  35 +    struct passwd *pwd;
  36 +    struct stat st,st_sd;
  37 +
  38 +    if(gethostname(hostname,MAX_HOSTNAME))
  39 +       return;
  40 +
  41 +    user_name=user_get_name(user);
  42 +    pwd=getpwnam(user_name);
  43 +    if(pwd == NULL || pwd->pw_dir == NULL)
  44 +       return;
  45 +
  46 +    if(stat("/dev/audio", &st))
  47 +      return;
  48 +
  49 +    if(st.st_uid == user_get_uid(user)) {
  50 +       gboolean drop_privileges;
  51 +       int fd=-1, i;
  52 +       oss_sysinfo si;
  53 +
  54 +       drop_privileges = geteuid () == 0;
  55 +       if (drop_privileges)
  56 +          privileges_drop (user_get_uid (user), user_get_gid (user));
  57 +
  58 +       save_dir=g_strdup_printf("%s/.audioctl", pwd->pw_dir);
  59 +       if (!save_dir)
  60 +          return;
  61 +
  62 +       if(stat(save_dir, &st_sd)) {
  63 +          if(mkdir(save_dir, S_IRWXU)){
  64 +            g_free(save_dir);
  65 +            return;
  66 +          }
  67 +       }
  68 +
  69 +       if ((fd = open("/dev/mixer", O_RDWR)) < 0){
  70 +          g_free(save_dir);
  71 +          return;
  72 +       }
  73 +
  74 +       if (ioctl(fd, SNDCTL_SYSINFO, &si) < 0) {
  75 +          g_free(save_dir);
  76 +          return;
  77 +       }
  78 +
  79 +       for (i = 0; i < si.nummixers; i++) {
  80 +          struct stat sbuf;
  81 +          oss_mixerinfo   mixer;
  82 +          char *command;
  83 +
  84 +          mixer.dev = i;
  85 +          if (ioctl(fd, SNDCTL_MIXERINFO, &mixer) != 0)
  86 +             continue;
  87 +
  88 +          command=g_strdup_printf(AUDIO_SETTINGS_SAVE, mixer.name, save_dir, hostname, mixer.name);
  89 +          system(command);
  90 +          g_free(command);
  91 +       }
  92 +
  93 +       if (drop_privileges)
  94 +          privileges_reclaim ();
  95 +
  96 +    }
  97 +    g_free(save_dir);
  98 +}
  99 +
 100  static gchar *
 101  read_string (void)
 102  {
 103 @@ -827,6 +827,9 @@
 104
 105          run_linc_cleanup(user);
 106
 107 +        if (g_strcmp0 (pam_getenv (pam_handle, "XDG_SESSION_CLASS"), "greeter") != 0)
 108 +            save_audio_settings(user);
 109 +
 110          if (!remote_host_name && !g_strcmp0(xdisplay,":0") && (g_str_has_prefix (tty, "/dev/vt/") || !g_strcmp0(tty,"/dev/console"))){
 111              di_devperm_logout (tty);
 112          }