Arguments (Debugging with GDB)
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4.3 Your Program’s Arguments
The arguments to your program can be specified by the arguments of the run
command. They are passed to a shell, which expands wildcard characters and performs redirection of I/O, and thence to your program. Your SHELL
environment variable (if it exists) specifies what shell GDB uses. If you do not define SHELL
, GDB uses the default shell (/bin/sh
on Unix).
On non-Unix systems, the program is usually invoked directly by GDB, which emulates I/O redirection via the appropriate system calls, and the wildcard characters are expanded by the startup code of the program, not by the shell.
run
with no arguments uses the same arguments used by the previous run
, or those set by the set args
command.
set args
Specify the arguments to be used the next time your program is run. If set args
has no arguments, run
executes your program with no arguments. Once you have run your program with arguments, using set args
before the next run
is the only way to run it again without arguments.
show args
Show the arguments to give your program when it is started.