Created
March 28, 2024 05:44
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socketpair usage
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#include <stdio.h> | |
#include <stdlib.h> | |
#include <unistd.h> | |
#include <sys/socket.h> | |
void child(int sock) { | |
char buf[1024]; | |
while (1) { | |
ssize_t n = read(sock, buf, sizeof(buf)); | |
if (n <= 0) { | |
perror("read"); | |
exit(1); | |
} | |
write(STDOUT_FILENO, buf, n); | |
} | |
} | |
void parent(int sock) { | |
char buf[1024]; | |
while (1) { | |
ssize_t n = read(STDIN_FILENO, buf, sizeof(buf)); | |
if (n <= 0) { | |
perror("read"); | |
exit(1); | |
} | |
write(sock, buf, n); | |
} | |
} | |
int main(void) { | |
int sv[2]; | |
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) { | |
perror("socketpair"); | |
exit(1); | |
} | |
pid_t pid = fork(); | |
if (pid == -1) { | |
perror("fork"); | |
exit(1); | |
} else if (pid == 0) { | |
close(sv[0]); | |
child(sv[1]); | |
} else { | |
close(sv[1]); | |
parent(sv[0]); | |
} | |
return 0; | |
} |
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