我正在尝试在 Windows 中通过 C 构建一个简单的 shell,我的平台不是很好,所以我搜索并从下面的一些代码开始:
shell_terminal = STDIN_FILENO;
shell_is_interactive = isatty (shell_terminal);
if (shell_is_interactive)
{
/* Loop until we are in the foreground. */
while (tcgetpgrp (shell_terminal) != (shell_pgid = getpgrp ()))
kill (- shell_pgid, SIGTTIN);
/* Ignore interactive and job-control signals. */
signal (SIGINT, SIG_IGN);
signal (SIGQUIT, SIG_IGN);
signal (SIGTSTP, SIG_IGN);
signal (SIGTTIN, SIG_IGN);
signal (SIGTTOU, SIG_IGN);
signal (SIGCHLD, SIG_IGN);
/* Put ourselves in our own process group. */
shell_pgid = getpid ();
if (setpgid (shell_pgid, shell_pgid) < 0)
{
perror ("Couldn't put the shell in its own process group");
exit (1);
}
/* Grab control of the terminal. */
tcsetpgrp (shell_terminal, shell_pgid);
/* Save default terminal attributes for shell. */
tcgetattr (shell_terminal, &shell_tmodes);
}
但我有一些错误:
[Error] 'tcgetpgrp' was not declared in this scope
[Error] 'getpgrp' was not declared in this scope
[Error] 'SIGTTIN' was not declared in this scope
[Error] 'kill' was not declared in this scope
...
我认为我的环境有问题或缺少某些库。我的问题是什么?谢谢!
因为,tcgetpgrp
函数,未由 ISO C standard
定义, 它必须被所有操作系统支持,而是由 IEEE POSIX
定义的Unix
最常支持的标准系统环境。
例如:
<unistd.h>
,这是编译这个程序所必需的,是由 POSIX
定义的头文件。标准,不是 ISO C
标准。
要么升级到POSIX
兼容系统,或使用 Windows API , 为 windows 平台提供类似的服务集。
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