gdb: Arguments
4.3 Your Program's Arguments
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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.
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