Comment 0 for bug 1234400

Please backport the following patch to the 1.6 branch:

http://bazaar.launchpad.net/~lightdm-team/lightdm/trunk/revision/1803

Otherwise a user with corrupt .Xauthority file cannot log in. strace lightdm shows:

21:48:35.028167 open("/home/thome/.Xauthority", O_RDONLY) = 8
21:48:35.028211 fstat(8, {st_mode=S_IFREG|0600, st_size=363, ...}) = 0
21:48:35.028242 read(8, "\1\0\0\6cochon\0\00216\0\22MIT-MAGIC-COOKIE-1\0\20\222\233\376\354\240glg\36\20\274\30\305\37:$\1\0\0\6cochon\0\00214\0\22MIT-MAGIC-COOKIE-1\0\20p\301wy>G\327\275_\226\236m\375%\373\302\1\0\0\6cochon\0\00213\0\22MIT-MAGIC-COOKIE-1\0\20\344\243\t\305uKW\215\313J\254i\302\252\341P\1\0\0\6cochon\0\00212\0\22MIT-MAGIC-COOKIE-1\0\20\315\367G\372\211 \354\r\334\205\34\340-A\30\261\1\0\0\6cochon\0\00211\0\22MIT-MAGIC-COOKIE-1\0\20G\2265\331\224\345\225\267\254\5\302"..., 363) = 363
21:48:35.028275 close(8) = 0
21:48:35.028331 open("/home/thome/.Xauthority", O_WRONLY|O_CREAT, 0600) = 8
21:48:35.028357 close(8) = 0
21:48:35.028655 tgkill(1367, 1368, SIGRT_1) = 0
21:48:35.028729 futex(0x7fff7460bde0, FUTEX_WAIT_PRIVATE, 1, NULL) = 0
21:48:35.028819 setresuid(0, 0, 4294967295) = 0
21:48:35.028854 tgkill(1367, 1368, SIGRT_1) = 0
21:48:35.028968 setresgid(0, 0, 4294967295) = 0
21:48:35.028995 write(2, "Error writing X authority: Failed to write X authority /home/thome/.Xauthority: Success\n", 88) = 88
21:48:35.029162 exit_group(1) = ?
21:48:35.029560 +++ exited with 1 +++

Best,

E.