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[script] Add "prompt" command 

The "prompt" command exposes the prompt() function, allowing a script
to prompt the user for a keypress and take action depending on the
result.  For example

  #!ipxe

  prompt -k 0x197e -t 2000 Press F12 to boot from network... || exit
  autoboot

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/1/head
Michael Brown 2011-03-07 18:32:30 +00:00
parent c4b6c244b0
commit e87fc5e743
1 changed files with 67 additions and 0 deletions
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67
src/image/script.c
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@ -35,6 +35,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
#include <ipxe/parseopt.h>
#include <ipxe/image.h>
#include <ipxe/shell.h>
#include <usr/prompt.h>
/** Currently running script
*
@ -288,3 +289,69 @@ struct command goto_command __command = {
.name = "goto",
.exec = goto_exec,
};
/** "prompt" options */
struct prompt_options {
/** Key to wait for */
unsigned int key;
/** Timeout */
unsigned int timeout;
};
/** "prompt" option list */
static struct option_descriptor prompt_opts[] = {
OPTION_DESC ( "key", 'k', required_argument,
struct prompt_options, key, parse_integer ),
OPTION_DESC ( "timeout", 't', required_argument,
struct prompt_options, timeout, parse_integer ),
};
/** "prompt" command descriptor */
static struct command_descriptor prompt_cmd =
COMMAND_DESC ( struct prompt_options, prompt_opts, 0, MAX_ARGUMENTS,
"[--key <key>] [--timeout <timeout>] [<text>]" );
/**
* "prompt" command
*
* @v argc Argument count
* @v argv Argument list
* @ret rc Return status code
*/
static int prompt_exec ( int argc, char **argv ) {
struct prompt_options opts;
char *text;
int rc;
/* Parse options */
if ( ( rc = parse_options ( argc, argv, &prompt_cmd, &opts ) ) != 0 )
goto err_parse;
/* Parse prompt text */
text = concat_args ( &argv[optind] );
if ( ! text ) {
rc = -ENOMEM;
goto err_concat;
}
/* Display prompt and wait for key */
if ( ( rc = prompt ( text, opts.timeout, opts.key ) ) != 0 )
goto err_prompt;
/* Free prompt text */
free ( text );
return 0;
err_prompt:
free ( text );
err_concat:
err_parse:
return rc;
}
/** "prompt" command */
struct command prompt_command __command = {
.name = "prompt",
.exec = prompt_exec,
};