evg@evg ~ $ dbus-monitor 
signal sender=org.freedesktop.DBus -> dest=:1.127 serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired
   string ":1.127"
method call sender=:1.127 -> dest=org.freedesktop.DBus serial=3 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=AddMatch
   string "type='method_call'"
method call sender=:1.127 -> dest=org.freedesktop.DBus serial=4 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=AddMatch
   string "type='method_return'"
method call sender=:1.127 -> dest=org.freedesktop.DBus serial=5 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=AddMatch
   string "type='error'"
^C^C^C^C^\[1]    10546 quit (core dumped)  dbus-monitor


evg@evg ~ $ gdb dbus-monitor core       
GNU gdb 6.6-alt3 (ALT Linux)
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i586-alt-linux"...
(no debugging symbols found)
Using host libthread_db library "/lib/libthread_db.so.1".

warning: Can't read pathname for load map: Input/output error.
Reading symbols from /usr/lib/libdbus-1.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libdbus-1.so.3
Reading symbols from /lib/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /lib/ld-linux.so.2...(no debugging symbols found)...done.
Loaded symbols for /lib/ld-linux.so.2
(no debugging symbols found)
Core was generated by `dbus-monitor'.
Program terminated with signal 3, Quit.
#0  0xb7f08686 in poll () from /lib/libc.so.6
(gdb) bt
#0  0xb7f08686 in poll () from /lib/libc.so.6
#1  0xb7fc4f6b in ?? () from /usr/lib/libdbus-1.so.3
#2  0xbfc03a50 in ?? ()
#3  0x00000001 in ?? ()
#4  0xffffffff in ?? ()
#5  0xb7fc3467 in ?? () from /usr/lib/libdbus-1.so.3
#6  0xb7fc3459 in ?? () from /usr/lib/libdbus-1.so.3
#7  0xb7fceff4 in ?? () from /usr/lib/libdbus-1.so.3
#8  0xbfc03a68 in ?? ()
#9  0xb7fbd0b7 in ?? () from /usr/lib/libdbus-1.so.3
#10 0xbfc03a50 in ?? ()
#11 0x00000001 in ?? ()
#12 0xffffffff in ?? ()
#13 0xb7fa5ff4 in ?? () from /usr/lib/libdbus-1.so.3
#14 0x0804d440 in ?? ()
#15 0x00000004 in ?? ()
#16 0xffffffff in ?? ()
#17 0xb7fa5052 in ?? () from /usr/lib/libdbus-1.so.3
#18 0x00000003 in ?? ()
#19 0x00000001 in ?? ()
#20 0x00000000 in ?? ()
(gdb) 
evg@evg ~ $ rpm -q dbus-tools
dbus-tools-1.2.12-alt3

Я что-то не понял - как из него штатно выйти? C-c, C-d не работают.