如何在unix管道句柄怎么样？ （pclose（）的fclose（））？ [英] How close pipe handle in unix? (fclose() of pclose())?
问题描述
如果我在unix中以这种方式创建pipe：
If I create pipe in unix this way:
int fds[] = {0, 0};
pipe(fds);
然后从<$ c>中创建 FILE * $ c> fds [0] 这样：
Then make FILE * from fds[0] this way:
FILE *pipe_read = fdopen(fds[0], "rt");
然后我应该怎么关闭这个文件（ pipe_read ）？
Then how should I close this file (pipe_read)?
-
fclose（pipe_read） -
pclose（pipe_read） -
close（fileno（pipe_read））
fclose(pipe_read)pclose(pipe_read)close(fileno(pipe_read))
推荐答案
fdopen FILE * 所以你应该 fclose 它。这也将关闭底层文件描述符。
fdopen returns a FILE* so you should fclose it. This will also close the underlying file descriptor as well.
pclose 调用意味着关闭一个 popen ，一个用于运行命令并用管道连接的命令。
The pclose call is meant for closing a handle created with popen, a function you use for running a command and connecting to it with pipes.
close 调用将关闭底层文件描述符，但不幸的是，在文件句柄有机会刷新其数据之前 - 换句话说，你可能会丢失数据。
The close call will close the underlying file descriptor but, unfortunately, before the file handle has had a chance to flush its data out - in other words, you're likely to lose data.
这篇关于如何在unix管道句柄怎么样？ （pclose（）的fclose（））？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
