void
remove_triggers(struct attrib **ap, const char *eventname,
const trigger_type * tt)
{
trigger **tp = get_triggers(*ap, eventname);
if (tp == NULL)
return;
while (*tp) {
/* first, remove all gate-triggers */
trigger *t = *tp;
if (t->type == tt) {
*tp = t->next;
t_free(t);
}
else
tp = &t->next;
}
}
int get_trigger(size_t led_number, char *buf, size_t buf_len) {
int err;
char *active;
if ((err = get_triggers(led_number, buf, buf_len)) < 0) {
return err;
}
/* Make sure trigger ends with a zero byte */
buf[buf_len - 1] = '\0';
/* Find active trigger */
active = strstr(buf, "[") + 1;
/* strtok to extract ONLY active trigger */
active = strtok(active, "[]");
/* Move to beginning of buf, including ¸'\0' */
memmove(buf, active, strlen(active) + 1);
return 1;
}
int set_trigger(size_t led_number, const char *trigger) {
int err;
char buf[TRIGGER_BUF_SIZE];
char *tmp;
char *err_tmp;
memset(buf, '\0', sizeof(buf));
if ((err = get_triggers(led_number, buf, sizeof(buf)) < 0)) {
return err;
}
if ((tmp = strstr(buf, trigger)) == NULL) {
fprintf(stderr, "%s: trigger must be one of %s\n", program_name,
buf);
return -ARGUMENT_ERROR;
}
if (strncmp(tmp, trigger, strlen(trigger)) != 0) {
fprintf(stderr, "%s: trigger must be one of %s\n", program_name,
buf);
return -ARGUMENT_ERROR;
}
/* Reassign tmp to end of trigger */
tmp = tmp + strlen(trigger);
/* Allowed characters after the string are these, I think */
if (*tmp != '\0' && *tmp != ' ' && *tmp != ']') {
fprintf(stderr, "%s: trigger must be one of %s\n", program_name,
buf);
return -ARGUMENT_ERROR;
}
return write_device_file(led_number, "trigger", trigger, strlen(trigger));
}