/*
140 kamil@rugged /tmp $ gcc test.c -lrump -lrumpdev -lrumpvfs -g -O0
141 kamil@rugged /tmp $ ./a.out                                                                       
[   1.0000000] pool redzone disabled for 'kmem-4096'
[   1.0000090] pool redzone disabled for 'buf64k'
Memory fault (core dumped) 
142 kamil@rugged /tmp $ gdb ./a.out
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Reading symbols from ./a.out...
(gdb) r
Starting program: /tmp/a.out 
[   1.0000000] pool redzone disabled for 'kmem-4096'
[New LWP 2 of process 29960]
[New LWP 3 of process 29960]
[New LWP 4 of process 29960]
[New LWP 5 of process 29960]
[New LWP 6 of process 29960]
[New LWP 7 of process 29960]
[New LWP 8 of process 29960]
[New LWP 9 of process 29960]
[New LWP 10 of process 29960]
[New LWP 11 of process 29960]
[New LWP 12 of process 29960]
[New LWP 13 of process 29960]
[New LWP 14 of process 29960]
[New LWP 15 of process 29960]
[New LWP 16 of process 29960]
[New LWP 17 of process 29960]
[New LWP 18 of process 29960]
[   1.0000090] pool redzone disabled for 'buf64k'
[New LWP 19 of process 29960]
[New LWP 20 of process 29960]
[New LWP 21 of process 29960]
[New LWP 22 of process 29960]
[New LWP 23 of process 29960]
[New LWP 22 of process 29960]
[New LWP 23 of process 29960]

Thread 1 "" received signal SIGSEGV, Segmentation fault.
pipe_ioctl (fp=<optimized out>, cmd=<optimized out>, data=0x7f7fffccd700)
    at /usr/src/lib/librump/../../sys/rump/../kern/sys_pipe.c:1108
warning: Source file is more recent than executable.
1108                            *(int *)data = pipe->pipe_buffer.cnt;
(gdb) bt
#0  pipe_ioctl (fp=<optimized out>, cmd=<optimized out>, data=0x7f7fffccd700)
    at /usr/src/lib/librump/../../sys/rump/../kern/sys_pipe.c:1108
#1  0x000075b0de65083f in sys_ioctl (l=<optimized out>, uap=0x7f7fffccd820, retval=<optimized out>)
    at /usr/src/lib/librump/../../sys/rump/../kern/sys_generic.c:671
#2  0x000075b0de6b8957 in sy_call (rval=0x7f7fffccd810, uap=0x7f7fffccd820, l=0x75b0de126500, 
    sy=<optimized out>) at /usr/src/lib/librump/../../sys/rump/../sys/syscallvar.h:65
#3  sy_invoke (code=54, rval=0x7f7fffccd810, uap=0x7f7fffccd820, l=0x75b0de126500, sy=<optimized out>)
    at /usr/src/lib/librump/../../sys/rump/../sys/syscallvar.h:94
#4  rump_syscall (num=num@entry=54, data=data@entry=0x7f7fffccd820, dlen=dlen@entry=24, 
    retval=retval@entry=0x7f7fffccd810)
    at /usr/src/lib/librump/../../sys/rump/librump/rumpkern/rump.c:769
#5  0x000075b0de6ad2ca in rump___sysimpl_ioctl (fd=<optimized out>, com=<optimized out>, 
    data=<optimized out>) at /usr/src/lib/librump/../../sys/rump/librump/rumpkern/rump_syscalls.c:979
#6  0x0000000000400bf7 in main (argc=1, argv=0x7f7fffccd8c8) at test.c:15
(gdb) q
A debugging session is active.

        Inferior 1 [process 29960] will be killed.

Quit anyway? (y or n) y
[ 31253.9132631] sorry, pid 29960 was killed: orphaned traced process
Killed 
143 kamil@rugged /tmp $ cat test.c                                                                    
*/
#include <sys/types.h>
#include <sys/ioctl.h>

#include <rump/rump.h>
#include <rump/rump_syscalls.h>

int
main(int argc, char **argv)
{
        int filedes[2];

        rump_init();
        rump_sys_pipe2(filedes, 0);
        rump_sys_dup2(filedes[1], filedes[0]);
        rump_sys_ioctl(filedes[1], FIONWRITE);
}