Adding mknod(1)

mknod.c

@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include "util.h"
+
+static void
+usage(void)
+{
+	eprintf("usage: mknod [-m mode] name type major minor\n");
+}
+
+int
+main(int argc, char **argv)
+{
+	mode_t type, mode = 0644;
+	mode_t types['u'+1];
+	dev_t dev;
+
+	types['u'] = types['c'] = S_IFCHR;
+	types['b'] = S_IFBLK;
+
+	ARGBEGIN {
+	case 'm':
+		mode = estrtol(EARGF(usage()), 8);
+		break;
+	default:
+		usage();
+	} ARGEND;
+
+	if(argc != 4)
+		usage();
+
+	if(strlen(argv[1]) != 1 || !strchr("ucb", argv[1][0]))
+		eprintf("mknod: '%s': invalid type\n", argv[1]);
+	type = types[(unsigned)argv[1][0]];
+
+	dev = makedev(estrtol(argv[2], 0), estrtol(argv[3], 0));
+
+	if(mknod(argv[0], type|mode, dev) == -1)
+		eprintf("mknod: '%s':", argv[0]);
+	return 0;
+}