Function fortune

example/fortune.cpp:24–80

This is a fun sample of creating your own extensible keyword. */

/* This is a fun sample of creating your own extensible keyword. */
int fortune(call *call, MessageComponent *comp, char *buf, int len)
{
    int pipes[2];
    char localbuf[SIPP_MAX_MSG_SIZE];
    char *p = localbuf;
    int ret;
    int written = 0;

    if (pipe(pipes) == -1) {
        ERROR("Could not create pipes!");
    }

    switch (fork()) {
    case -1:
        ERROR("Fork failed: %s", strerror(errno));
    case 0:
        /* We are the child. */
        close(pipes[0]);
        dup2(pipes[1], fileno(stdout));
        dup2(pipes[1], fileno(stderr));
        close(fileno(stdin));
        system("/usr/bin/fortune");
        exit (127);
    default:
        /* We are the parent*/
        close(pipes[1]);
        while ((ret = read(pipes[0], p, sizeof(localbuf) - (p - localbuf))) > 0) {
            p += ret;
        }
        *p = '\0';
        close(pipes[0]);

        if (len > p - localbuf) {
            len = p -localbuf;
        }

        p = localbuf;
        while(len-- > 0) {
            if (*p == '\n') {
                if (len < 3) {
                    break;
                }
                *buf++ = '\r';
                *buf++ = '\n';
                *buf++ = ' ';
                written += 3;
                p++;
            } else {
                *buf++ = *p++;
                written++;
            }
        }
        break;
    }

    return written;
}