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echo_un.c
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echo_un.c
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#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
int main() {
int sock;
struct sockaddr_un addr;
if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
perror("socket");
return 1;
}
{
int v, l = 4;
printf("%d\n", getsockopt(sock, SOL_SOCKET, SO_SNDLOWAT, &v, &l));
printf("%d\n", v);
}
memset(&addr, 0, sizeof(addr));
addr.sun_family = PF_UNIX;
strcpy(addr.sun_path, "/tmp/hoge");
if (bind(sock, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
perror("bind");
return 1;
}
if (listen(sock, 1) < 0) {
perror("listen");
return 1;
}
while (1) {
struct sockaddr_un dummy;
int fd;
int len = sizeof(dummy);
if ((fd = accept(sock, (struct sockaddr*)&dummy, &len)) < 0) {
perror("accept");
return 1;
}
while (1) {
int ret;
char c;
ret = read(fd, &c, 1);
if (ret < 0) {
perror("read");
return 1;
}
else if (ret == 0) {
break;
}
write(fd, &c, 1);
}
close(fd);
}
}