Forkpty failed
From Linuxintro
Revision as of 17:58, 5 April 2015 by imported>ThorstenStaerk
I have a working environment and a non-working environment of shellinabox.
In the non-working environment shellinaboxd gives me
forkpty failed
as error message. Ok, let's strace it:
# ps -A| grep shellin
132 ? 00:00:00 shellinaboxd
154 ? 00:00:00 shellinaboxd
# strace -p 132 -p 154
[...]
[pid 154] chown("/dev/pts/1", 65534, 5) = -1 EPERM (Operation not permitted)
[pid 154] clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7fd0c22959d0) = 10036
[pid 154] wait4(10036, <unfinished ...>
[pid 132] <... write resumed> ) = 173
[pid 132] recvmsg(3, <unfinished ...>
[pid 154] <... wait4 resumed> [{WIFEXITED(s) && WEXITSTATUS(s) == 4}], 0, NULL) = 10036
[pid 154] --- SIGCHLD (Child exited) @ 0 (0) ---
[pid 154] rt_sigreturn(0x11) = 10036
[pid 154] close(3) = 0
[pid 154] pipe([3, 5]) = 0
[pid 154] write(5, "forkpty() failed\r\n", 18) = 18
In the working environment the call to chown is missing.
Solution:
shellinaboxd --user=0
