如何在程序中打开一个控制台终端并在其中运行指定程序？

[han012]

请问如何在程序中打开一个新的控制台终端(terminal), 然后在启动
一个新程序（fork/exec），并让新进程在新的控制台终端中运行？

[猫已经找不回了]

直接在代码里system("shell指令");

该指令会在一个后台子进程终端执行.

[morris88]

建议看看LZ， agetty -> login -> bash，它貌似就像楼主需要的：

    /*
     * We must fork before setuid() because we need to call
     * pam_close_session() as root.
     */

    child_pid = fork();
    if (child_pid < 0) {
       int errsv = errno;
       /* error in fork() */
       fprintf(stderr, _("login: failure forking: %s"), strerror(errsv));
       PAM_END;
       exit(0);
    }

    if (child_pid) {
       /* parent - wait for child to finish, then cleanup session */
       close(0);
       close(1);
       close(2);
       sa.sa_handler = SIG_IGN;
       sigaction(SIGQUIT, &sa, NULL);
       sigaction(SIGINT, &sa, NULL);

       /* wait as long as any child is there */
       while(wait(NULL) == -1 && errno == EINTR)
	       ;
       openlog("login", LOG_ODELAY, LOG_AUTHPRIV);
       PAM_END;
       exit(0);
    }

    /* child */

    /* restore to old state */
    sigaction(SIGHUP, &oldsa_hup, NULL);
    sigaction(SIGTERM, &oldsa_term, NULL);
    if(got_sig)
	    exit(1);

    /*
     * Problem: if the user's shell is a shell like ash that doesnt do
     * setsid() or setpgrp(), then a ctrl-\, sending SIGQUIT to every
     * process in the pgrp, will kill us.
     */

    /* start new session */
    setsid();

    /* make sure we have a controlling tty */
    opentty(ttyn);
    openlog("login", LOG_ODELAY, LOG_AUTHPRIV);	/* reopen */

    /*
     * TIOCSCTTY: steal tty from other process group.
     */
    if (ioctl(0, TIOCSCTTY, 1))
	    syslog(LOG_ERR, _("TIOCSCTTY failed: %m"));
#endif
    signal(SIGINT, SIG_DFL);

    /* discard permissions last so can't get killed and drop core */
    if(setuid(pwd->pw_uid) < 0 && pwd->pw_uid) {
	syslog(LOG_ALERT, _("setuid() failed"));
	exit(1);
    }

    /* wait until here to change directory! */
    if (chdir(pwd->pw_dir) < 0) {
	printf(_("No directory %s!\n"), pwd->pw_dir);
	if (chdir("/"))
	  exit(0);
	pwd->pw_dir = "/";
	printf(_("Logging in with home = \"/\".\n"));
    }

    /* if the shell field has a space: treat it like a shell script */
    if (strchr(pwd->pw_shell, ' ')) {
	buff = malloc(strlen(pwd->pw_shell) + 6);

	if (!buff) {
	    fprintf(stderr, _("login: no memory for shell script.\n"));
	    exit(0);
	}

	strcpy(buff, "exec ");
	strcat(buff, pwd->pw_shell);
	childArgv[childArgc++] = "/bin/sh";
	childArgv[childArgc++] = "-sh";
	childArgv[childArgc++] = "-c";
	childArgv[childArgc++] = buff;
    } else {
	tbuf[0] = '-';
	xstrncpy(tbuf + 1, ((p = rindex(pwd->pw_shell, '/')) ?
			   p + 1 : pwd->pw_shell),
		sizeof(tbuf)-1);

	childArgv[childArgc++] = pwd->pw_shell;
	childArgv[childArgc++] = tbuf;
    }

    childArgv[childArgc++] = NULL;

    execvp(childArgv[0], childArgv + 1);

    errsv = errno;

    if (!strcmp(childArgv[0], "/bin/sh"))
	fprintf(stderr, _("login: couldn't exec shell script: %s.\n"),
		strerror(errsv));
    else
	fprintf(stderr, _("login: no shell: %s.\n"), strerror(errsv));

    exit(0);
}

[liliangbao]

帮顶~~~

[nyhenry1]

morris88的代码挺有用记下来了：）

[xhy_851221]

system和fork+exec都可以

[hupo1982]

我一直用system

[T-Quake]

[Quote=引用 1 楼 hairetz 的回复:]
直接在代码里system("shell指令");

该指令会在一个后台子进程终端执行.
[/Quote]

system() 不好的习惯呕，估计代码看的少了，一般老外写的程序很少使用system()尽管这个方法比较简单。
你可以尝试使用 FILE *popen(const char *command, const char *type);

或者gboolean g_spawn_command_line_sync (const gchar *command_line, //这里放你的shell命令
gchar **standard_output,
gchar **standard_error,
gint *exit_status,
GError **error);
推荐 最好使用后者 popen没办法的话也可以使用（如果你想获取命令在终端上执行后的输出结果，可以用fread读取命令后的结果，可以使用popen）,如果没这个要求，推荐使用g_spawn_command_line_sync()（同步的） 异步的也有。自己看吧

[once_and_again]

systm("gnome-terminal");

[BlairZhong]

[Quote=引用 7 楼 HellDevil 的回复:]
引用 1 楼 hairetz 的回复:
直接在代码里system("shell指令");

该指令会在一个后台子进程终端执行.


system() 不好的习惯呕，估计代码看的少了，一般老外写的程序很少使用system()尽管这个方法比较简单。
你可以尝试使用 FILE *popen(const char *command, const char *type);

或者gboolean g_spawn_command_line_sync (const gchar *command_line, //这里放你的shell命令
…
[/Quote]

这个g_spawn_command_line_sync是glib的?

[超龄编码人]

system调用