/*----------------------------------------------------------- */
int clish_shell_exec_action(clish_context_t *context, char **out)
{
int result = -1;
clish_sym_t *sym;
char *script;
clish_hook_action_fn_t *func = NULL;
const clish_action_t *action = clish_context__get_action(context);
clish_shell_t *shell = clish_context__get_shell(context);
if (!(sym = clish_action__get_builtin(action)))
return 0;
if (shell->dryrun && !clish_sym__get_permanent(sym))
return 0;
if (!(func = clish_sym__get_func(sym))) {
fprintf(stderr, "Error: Default ACTION symbol is not specified.\n");
return -1;
}
script = clish_shell_expand(clish_action__get_script(action), SHELL_VAR_ACTION, context);
result = func(context, script, out);
lub_string_free(script);
return result;
}
/*----------------------------------------------------------- */
int clish_shell_exec_action(clish_context_t *context, char **out)
{
int result = -1;
const clish_sym_t *sym;
char *script;
const void *func = NULL; /* We don't know the func API at this time */
const clish_action_t *action = clish_context__get_action(context);
clish_shell_t *shell = clish_context__get_shell(context);
bool_t intr = clish_action__get_interrupt(action);
/* Signal vars */
struct sigaction old_sigint, old_sigquit, old_sighup;
struct sigaction sa;
sigset_t old_sigs;
if (!(sym = clish_action__get_builtin(action)))
return 0;
if (shell->dryrun && !clish_sym__get_permanent(sym))
return 0;
if (!(func = clish_sym__get_func(sym))) {
fprintf(stderr, "Error: Default ACTION symbol is not specified.\n");
return -1;
}
script = clish_shell_expand(clish_action__get_script(action), SHELL_VAR_ACTION, context);
/* Ignore and block SIGINT, SIGQUIT, SIGHUP.
* The SIG_IGN is not a case because it will be inherited
* while a fork(). It's necessary to ignore signals because
* the klish itself and ACTION script share the same terminal.
*/
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sa.sa_handler = sigignore; /* Empty signal handler */
sigaction(SIGINT, &sa, &old_sigint);
sigaction(SIGQUIT, &sa, &old_sigquit);
sigaction(SIGHUP, &sa, &old_sighup);
/* Block signals for children processes. The block state is inherited. */
if (!intr) {
sigset_t sigs;
sigemptyset(&sigs);
sigaddset(&sigs, SIGINT);
sigaddset(&sigs, SIGQUIT);
sigaddset(&sigs, SIGHUP);
sigprocmask(SIG_BLOCK, &sigs, &old_sigs);
}
/* Find out the function API */
/* CLISH_SYM_API_SIMPLE */
if (clish_sym__get_api(sym) == CLISH_SYM_API_SIMPLE) {
result = ((clish_hook_action_fn_t *)func)(context, script, out);
/* CLISH_SYM_API_STDOUT and output is not needed */
} else if ((clish_sym__get_api(sym) == CLISH_SYM_API_STDOUT) && (!out)) {
result = ((clish_hook_oaction_fn_t *)func)(context, script);
/* CLISH_SYM_API_STDOUT and outpus is needed */
} else if (clish_sym__get_api(sym) == CLISH_SYM_API_STDOUT) {
result = clish_shell_exec_oaction((clish_hook_oaction_fn_t *)func,
context, script, out);
}
/* Restore SIGINT, SIGQUIT, SIGHUP */
if (!intr) {
sigprocmask(SIG_SETMASK, &old_sigs, NULL);
/* Is the signals delivery guaranteed here (before
sigaction restore) for previously blocked and
pending signals? The simple test is working well.
I don't want to use sigtimedwait() function because
it needs a realtime extensions. The sigpending() with
the sleep() is not nice too. Report bug if clish will
get the SIGINT after non-interruptable action.
*/
}
sigaction(SIGINT, &old_sigint, NULL);
sigaction(SIGQUIT, &old_sigquit, NULL);
sigaction(SIGHUP, &old_sighup, NULL);
lub_string_free(script);
return result;
}