feat: Initial commit

Lab05/pipes.c

@@ -0,0 +1,56 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <sys/wait.h>
+
+void receiver(int fd);
+void sender(int fd);
+
+int main() {
+
+	int fds[2];
+	pipe(fds);
+	if (fork()) {
+		receiver(fds[0]);
+	} else if (fork()) {
+		sender(fds[1]);	
+	}
+	wait(NULL);
+}
+
+void sender(int fd) {
+	char * str;
+	int len;
+	int q = 0;
+
+	while (q != EOF) {
+		q = scanf(" %ms", &str);
+		len = strlen(str);
+		printf("%d\n",len);
+		if (len == 1) break;
+		write(fd, &len, sizeof(int));
+		write(fd, str, len);
+		free(str);
+	}
+	close(fd);
+}
+
+void receiver(int fd) {
+	char * str;
+	int len, q = 0;
+	
+	while (1) {
+		q = read(fd, &len, sizeof(int));
+		if (q == EOF) break;
+		str = malloc(len * sizeof(char));
+		q = read(fd, str, len);
+		if (q == EOF) break;
+		for (char * c = str; *c != '\0'; c++)
+			*c = toupper(*c);
+		puts(str);
+		free(str);
+	
+	}
+}