The environment consists of a set of environment variables and their values. Environment variables conventionally record such things as your user name, your home directory, your terminal type, and your search path for programs to run. Usually you set up environment variables with the shell and they are inherited by all the other programs you run. When debugging, it can be useful to try running your program with a modified environment without having to start GDB over again.
path directory
PATH
environment variable
(the search path for executables) that will be passed to your program.
The value of PATH
used by GDB does not change.
You may specify several directory names, separated by whitespace or by a
system-dependent separator character (`:' on Unix, `;' on
MS-DOS and MS-Windows). If directory is already in the path, it
is moved to the front, so it is searched sooner.
You can use the string `$cwd' to refer to whatever is the current
working directory at the time GDB searches the path. If you
use `.' instead, it refers to the directory where you executed the
path
command. GDB replaces `.' in the
directory argument (with the current path) before adding
directory to the search path.
show paths
PATH
environment variable).
show environment [varname]
environment
as env
.
set environment varname [=value]
set env USER = footells the debugged program, when subsequently run, that its user is named `foo'. (The spaces around `=' are used for clarity here; they are not actually required.)
unset environment varname
unset environment
removes the variable from the environment,
rather than assigning it an empty value.
Warning: On Unix systems, GDB runs your program using
the shell indicated
by your SHELL
environment variable if it exists (or
/bin/sh
if not). If your SHELL
variable names a shell
that runs an initialization file--such as `.cshrc' for C-shell, or
`.bashrc' for BASH--any variables you set in that file affect
your program. You may wish to move setting of environment variables to
files that are only run when you sign on, such as `.login' or
`.profile'.
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