Description of problem:
gcore can fail to dump a core file in a terminal window that's too short (too few lines).  This is because gcore runs gdb with STDIN redirected from /dev/null, but if there's a lot of output, gdb will prompt
   ---Type <return> to continue, or q <return> to quit---
and fail.

To fix this, just add a 'set height 0' line in the gdb batch commands.

Version-Release number of selected component (if applicable):
gdb-6.8-37.el5

How reproducible:
every time

Steps to Reproduce:
1. save this program as test-gcore.c
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include <stdio.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
        sleep(120);
        return(0);
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

2. compile test.c with a lot of shared libraries
gcc -I. -c -o test-gcore.o test-gcore.c
gcc -I. -o test-gcore test-gcore.o -L/usr/lib -ldl -lrpm -lrpmio -lpopt \
    -lz -lcrypto -lm -lssl -lxml2 -lxmlsec1 -lxslt -L/usr/lib/lib \
    -lwrap -Wl,-E \
    -Wl,-rpath,/usr/lib/perl5/5.8.8/i386-linux-thread-multi/CORE \
    -L/usr/local/lib \
    /usr/lib/perl5/5.8.8/i386-linux-thread-multi/auto/DynaLoader/DynaLoader.a \
    -L/usr/lib/perl5/5.8.8/i386-linux-thread-multi/CORE -lperl \
    -lresolv -lnsl -ldl -lm -lcrypt -lutil -lpthread -lc

3. ./test-gcore &

4. xterm -geometry 80x10 &

5. in the small xterm:
     gcore `pidof test-gcore`

Actual results:
(no debugging symbols found)
(no debugging symbols found)
...
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0xb7f22940 (LWP 15018)]
---Type <return> to continue, or q <return> to quit---0x00dda402 in __kernel_vsyscall ()
gcore: failed to create core.15018

Expected results:
successfully create a core of test-gcore

Additional info:
This will fix the problem:
--- /usr/bin/gcore      2010-01-13 03:06:37.000000000 -0500
+++ /usr/bin/gcore.new  2010-01-13 10:50:57.000000000 -0500
@@ -64,6 +64,7 @@
        # Write gdb script for pid $pid.
        cat >>$tmpfile <<EOF
 attach $pid
+set height 0
 gcore $name.$pid
 detach
 quit