(gdb.info) Arguments

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 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.
 

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