Leitura de lines, words e bytes de stream

wc.c

@@ -1,6 +1,27 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
-int main() {
+int main(int argc, char **argv) {
+    char buffer[BUFSIZ];
+    int lines = 0, words = 0, bytes = 0;
+    FILE *stream = fopen(argv[1], "r");
+    if (stream == NULL) {
+        perror("Erro ao abrir o arquivo");
+        exit(EXIT_FAILURE);
+    }
+    while (fgets(buffer, BUFSIZ, stream) != NULL) {
+        /* bytes     */
+        bytes += strlen(buffer);
+        char *str;
+        /* words     */
+        str = strdup(buffer);
+        while (strtok_r(str, " \t\n", &str) != NULL)
+            words++;
+        /* lines     */
+        lines++;
+    }
+    printf("%d %d %d %s\n", lines, words, bytes, argv[1]);
+    fclose(stream);
     return EXIT_SUCCESS;
 }