Add original unix v6

source/s2/nice.c

@@ -0,0 +1,40 @@
+/* nice */
+int	nicarg	4;
+char	*args[100];
+char	string[10000];
+
+main(argc, argv)
+int argc;
+char *argv[];
+{
+	int i;
+	register char **argp, *strp, *p;
+
+	if(argc > 1 && argv[1][0] == '-') {
+		nicarg = atoi(&argv[1][1]);
+		argc--;
+		argv++;
+	}
+	if(argc < 2) {
+		printf("usage: nice [ -n ] command\n");
+		exit(1);
+	}
+	argc--;
+	argv++;
+	argp = args;
+	strp = string;
+	for (i=0; i<9; i++)
+		*strp++ = "/usr/bin/"[i];
+	for(i=0; i<argc; i++) {
+		*argp++ = strp;
+		p = *argv++;
+		while(*strp++ = *p++);
+	}
+	*argp = 0;
+	nice(nicarg);
+	execv(string+9, args);
+	execv(string+4, args);
+	execv(string, args);
+	printf("%s not found\n", string+9);
+	exit(1);
+}