main.c

unix环境高级编程的源代码

#include    "call.h"

            /* define global variables */
char     escapec = '~';
char    *src;
char    *dst;

static void    usage(char *);

int
main(int argc, char *argv[])
{
    int            c, remfd, debug;
    char        args[MAXLINE];

    args[0] = 0;    /* build arg list for conn server here */
    opterr = 0;        /* don't want getopt() writing to stderr */
    while ( (c = getopt(argc, argv, "des:o")) != EOF) {
        switch (c) {
        case 'd':        /* debug */
            debug = 1;
            strcat(args, "-d ");
            break;

        case 'e':        /* even parity */
            strcat(args, "-e ");
            break;

        case 'o':        /* odd parity */
            strcat(args, "-o ");
            break;

        case 's':        /* speed */
            strcat(args, "-s ");
            strcat(args, optarg);
            strcat(args, " ");
            break;

        case '?':
            usage("unrecognized option");
        }
    }
    if (optind < argc)
        strcat(args, argv[optind]);    /* name of host to call */
    else
        usage("missing <hostname> to call");

    if ( (remfd = call(args)) < 0)    /* place the call */
        exit(1);    /* call() prints reason for failure */
    printf("Connected\n");

    if (tty_raw(STDIN_FILENO) < 0)    /* user's tty to raw mode */
        err_sys("tty_raw error");
    if (atexit(tty_atexit) < 0)        /* reset user's tty on exit */
        err_sys("atexit error");

    loop(remfd);                    /* and do it */

    printf("Disconnected\n\r");
    exit(0);
}

static void
usage(char *msg)
{
    err_quit("%s\nusage: call -d -e -o -s<speed> <hostname>", msg);
}