lab25 abramenko

23213/v.abramenko/lab25/lab25.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <sys/wait.h>
+
+#define BUF_SIZE 1024
+
+int main() {
+    int fd[2];
+    if(pipe(fd) == -1) {
+        perror("pipe failed");
+        exit(-1);
+    }
+
+    pid_t pid = fork();
+    char buf[BUF_SIZE];
+    ssize_t rc;
+    switch (pid) {
+    case -1:
+        perror("fork failed");
+        exit(-1);
+    case 0:
+        close(fd[0]);
+        while((rc = read(STDIN_FILENO, buf, BUF_SIZE)) > 0) {
+            if (write(fd[1], buf, rc) == -1) {
+                perror("write failed");
+                exit(-1);
+            }
+        }
+
+        if(rc == -1) {
+            perror("read failed");
+            exit(-1);
+        }
+        exit(0);
+    default:
+        close(fd[1]);
+        while((rc = read(fd[0], buf, BUF_SIZE)) > 0) {
+            for (int i = 0; i < rc; i++) {
+                putchar(toupper((unsigned char)buf[i]));
+            }
+        }
+
+        if(rc == -1) {
+            perror("read failed");
+            exit(-1);
+        }
+        if (wait(NULL) == -1) {
+            perror("wait failed");
+            exit(-1);
+        }
+        exit(0);
+    }    
+}