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The C programming language made simple

Introduction to FIFOs (aka named pipes) in C

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/types.h> #include <sys/wait.h> #include <fcntl.h> #include <errno.h> int main(int argc, char* argv[]) { if (mkfifo("myfifo1", 0777) == -1) { if (errno != EEXIST) { printf("Could not create fifo file\n"); return 1; } } printf("Opening...\n"); int fd = open("myfifo1", O_WRONLY); printf("Opened\n"); int x = 97; if (write(fd, &x, sizeof(x)) == -1) { return 2; } printf("Written\n"); close(fd); printf("Closed\n"); return 0; }