backlog of changes from the uconsole

Wip/head/head.c

@@ -1,12 +1,26 @@
-#include <stdio.h>
+#include <stdio.h> /* fprintf(3), stderr */
 #include <stdlib.h>
+#include <unistd.h> /* getopt(3) */
 
-/* The philosophical bits - /should this be a shell script?/ -
- * are more complicated than the actual program. sed(1) is not currently a part
- * of this project so there shouldn't be reliance on it. */
+static int lines = 10; /* POSIX.1 */
+static char *program_name = "head";
 
 int main(int argc, char *argv[]){
-	char *argv0 = argv[0];
-	size_t i;
+	int c;
+	extern char *optarg;
+	extern int opterr, optind, optopt;
 
-	
+	if(argc > 0)
+		program_name = argv[0];
+
+	while((c = getopt(argc, argv, "n:")) != -1)
+		switch(c){
+		case 'n':
+			break;
+		default:
+#ifdef IGIT /* parse -[digit] options */
+#endif /* ifdef IGIT */
+usage:			fprintf(stderr, "Usage: %s (-n [lines]) (file...)\n",
+				program_name);
+			return EX_USAGE;
+		}