[英]C forking doesn't work
I'm trying to make a server where it listens to 2 ports and does something with the incoming data, while printing out a dot every second to let people know it's still running. 我正在尝试制作一个服务器,在其中侦听2个端口并处理传入的数据,同时每秒打印一个点以使人们知道它仍在运行。 I want to do this by using
fork()
. 我想通过使用
fork()
做到这一点。 I'm trying: 我正在努力:
p = fork();
if(p == 0){
if( getsockname( sock1, (struct sockaddr *) &name1, &length1) == -1 ) {
perror( "getting socket name" );
exit(3);
}
printf( "Socket port #%d\n", ntohs( name1.sin_port ) );
if( getsockname( sock2, (struct sockaddr *) &name2, &length2) == -1 ) {
perror( "getting socket name" );
exit(3);
}
printf( "Socket port #%d\n", ntohs( name2.sin_port ) );
}
else if(p > 0){
printf("inhere"); //
p1 = fork();
if(p1 > 0) {
while(TRUE) {
write(".");
sleep(1);
}
}
...
This doesn't even print the inhere
string in the child process. 这甚至不打印子进程中的
inhere
字符串。 What am I doing wrong? 我究竟做错了什么?
The child process gets a 0 as the return value. 子进程的返回值为0。 You might call an fflush(0) right after the printf call and see if it helps.
您可以在printf调用之后立即调用fflush(0),看看是否有帮助。
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