Initial Upload

wc.c

@@ -0,0 +1,52 @@
+#include "types.h"
+#include "stat.h"
+#include "user.h"
+
+char buf[512];
+
+void wc(int fd, char *name)  {
+    int i, n;
+    int l, w, c, inword;
+
+    l = w = c = 0;
+    inword = 0;
+    while ((n = read(fd, buf, sizeof(buf))) > 0) {
+        for (i = 0; i < n; i++) {
+            c++;
+            if (buf[i] == '\n') {
+                l++;
+            }
+            if (strchr(" \r\t\n\v", buf[i])) {
+                inword = 0;
+            }
+            else if (!inword) {
+                w++;
+                inword = 1;
+            }
+        }
+    }
+    if (n < 0) {
+        printf(1, "wc: read error\n");
+        exit();
+    }
+    printf(1, "%d %d %d %s\n", l, w, c, name);
+}
+
+int main(int argc, char *argv[])     {
+    int fd, i;
+
+    if (argc <= 1) {
+        wc(0, "");
+        exit();
+    }
+
+    for (i = 1; i < argc; i++) {
+        if ((fd = open(argv[i], 0)) < 0) {
+            printf(1, "wc: cannot open %s\n", argv[i]);
+            exit();
+        }
+        wc(fd, argv[i]);
+        close(fd);
+    }
+    exit();
+}