/**
* Execute command line
*
* @v command Command line
* @ret rc Return status code
*
* Execute the named command and arguments.
*/
int system ( const char *command ) {
int count = split_command ( ( char * ) command, NULL );
char *all_tokens[ count + 1 ];
int ( * process_next ) ( int rc );
char *command_copy;
char **tokens;
int argc;
int process;
int rc = 0;
/* Create modifiable copy of command */
command_copy = strdup ( command );
if ( ! command_copy )
return -ENOMEM;
/* Split command into tokens */
split_command ( command_copy, all_tokens );
all_tokens[count] = NULL;
/* Process individual commands */
process = 1;
for ( tokens = all_tokens ; ; tokens += ( argc + 1 ) ) {
/* Find command terminator */
argc = command_terminator ( tokens, &process_next );
/* Expand tokens and execute command */
if ( process ) {
char *argv[ argc + 1 ];
/* Expand tokens */
if ( ( rc = expand_tokens ( argc, tokens, argv ) ) != 0)
break;
argv[argc] = NULL;
/* Execute command */
rc = execv ( argv[0], argv );
/* Free tokens */
free_tokens ( argv );
}
/* Stop processing, if applicable */
if ( shell_stopped ( SHELL_STOP_COMMAND ) )
break;
/* Stop processing if we have reached the end of the
* command.
*/
if ( ! process_next )
break;
/* Determine whether or not to process next command */
process = process_next ( rc );
}
/* Free modified copy of command */
free ( command_copy );
return rc;
}
/**
* Terminate script processing on shell exit or command failure
*
* @v rc Line processing status
* @ret terminate Terminate script processing
*/
static int terminate_on_exit_or_failure ( int rc ) {
return ( shell_stopped ( SHELL_STOP_COMMAND_SEQUENCE ) ||
( rc != 0 ) );
}
