/**
* Execute script
*
* @v image Script
* @ret rc Return status code
*/
static int script_exec ( struct image *image ) {
size_t saved_offset;
int rc;
/* Temporarily de-register image, so that a "boot" command
* doesn't throw us into an execution loop.
*/
unregister_image ( image );
/* Preserve state of any currently-running script */
saved_offset = script_offset;
/* Process script */
rc = process_script ( image, script_exec_line,
terminate_on_exit_or_failure );
/* Restore saved state */
script_offset = saved_offset;
/* Re-register image (unless we have been replaced) */
if ( ! image->replacement )
register_image ( image );
return rc;
}
/**
* Execute script
*
* @v image Script
* @ret rc Return status code
*/
static int script_exec ( struct image *image ) {
size_t offset = 0;
off_t eol;
size_t len;
int rc;
/* Temporarily de-register image, so that a "boot" command
* doesn't throw us into an execution loop.
*/
unregister_image ( image );
while ( offset < image->len ) {
/* Find length of next line, excluding any terminating '\n' */
eol = memchr_user ( image->data, offset, '\n',
( image->len - offset ) );
if ( eol < 0 )
eol = image->len;
len = ( eol - offset );
/* Copy line, terminate with NUL, and execute command */
{
char cmdbuf[ len + 1 ];
copy_from_user ( cmdbuf, image->data, offset, len );
cmdbuf[len] = '\0';
DBG ( "$ %s\n", cmdbuf );
if ( ( rc = system ( cmdbuf ) ) != 0 ) {
DBG ( "Command \"%s\" failed: %s\n",
cmdbuf, strerror ( rc ) );
goto done;
}
}
/* Move to next line */
offset += ( len + 1 );
}
rc = 0;
done:
/* Re-register image and return */
register_image ( image );
return rc;
}
status_t
_user_unregister_image(image_id id)
{
return unregister_image(thread_get_current_thread()->team, id);
}
/**
* Free an image
*
* @v image Executable/loadable image
*/
void imgfree ( struct image *image ) {
unregister_image ( image );
}
