Check result of write (thans to Alexander Kapshuk <alexander.kapshuk@gmail)

89826f41 · Frans Kaashoek · 912575ad · 89826f41
--- a/cat.c
+++ b/cat.c
@@ -9,8 +9,12 @@ cat(int fd)
 {
  int n;

-  while((n = read(fd, buf, sizeof(buf))) > 0)
-    write(1, buf, n);
+  while((n = read(fd, buf, sizeof(buf))) > 0) {
+    if (write(1, buf, n) != n) {
+      printf(1, "cat: write error\n");
+      exit();
+    }
+  }
  if(n < 0){
    printf(1, "cat: read error\n");
    exit();