HP gnu source-level debugger 5992-4701 - Manual (Page 40)

variable substitution) in describing the
arguments. On Unix systems, you can control
which shell is used with the SHELL environment
variable. GDB uses the C shell (/usr/bin/csh).
See
“Arguments To Your Program” (page 41) .
environment. Your program inherits its environment from
GDB. However, you can use the GDB commands
set environment
and unset environment
to change parts of the environment that affect
your program. See
“Program Environment”
(page 41) .
working directory. Your program inherits its working directory from
GDB. You can set the GDB working directory
with the cd command in GDB. See
“Working
directory” (page 43) .
standard input and output. Your program as default uses the same device
for standard input and standard output as GDB
is using. You can redirect input and output in
the run command line, or you can use the tty
command to set a different device for your
40 Running Programs Under GDB