From bc4ca8f73ece3cb3d6d3538ea182b078142c65c9 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Wed, 20 Nov 2019 16:35:46 -0500
Subject: add rough outlines of cpio and tar interfaces

---
 tar.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)

(limited to 'tar.c')

diff --git a/tar.c b/tar.c
index 201b455..44ee678 100644
--- a/tar.c
+++ b/tar.c
@@ -23,11 +23,13 @@
  */
 
 #define _XOPEN_SOURCE 700
+#include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
 #include <tar.h>
+#include <unistd.h>
 
 #include "pax.h"
 
@@ -125,3 +127,86 @@ int tar_list(FILE *input, size_t firstlen, void *firstblock)
 	}
 	return 0;
 }
+
+int tar_main(int argc, char *argv[])
+{
+	setlocale(LC_ALL, "");
+	int c;
+
+	while ((c = getopt(argc, argv, "")) != -1) {
+		return 1;
+	}
+
+	if (optind >= argc) {
+		fprintf(stderr, "tar: missing operands\n");
+		return 1;
+	}
+
+	char buf[512];
+
+	switch (argv[optind][0]) {
+	case 'r':
+		// append
+		break;
+
+	case 'x':
+		// extract
+		break;
+
+	case 't':
+		fread(buf, 1, sizeof(buf), stdin);
+		return tar_list(stdin, 512, buf);
+		break;
+
+	case 'u':
+		// update
+		break;
+
+	case 'c':
+		// create
+		break;
+
+	default:
+		fprintf(stderr, "tar: unknown function '%c'\n",
+			argv[optind][0]);
+		return 1;
+	}
+
+	for (size_t i = 1; argv[optind][i] != '\0'; i++) {
+		switch(argv[optind][i]) {
+		case 'v':
+			// verbose
+			break;
+
+		case 'w':
+			// wait for confirmation
+			break;
+
+		case 'f':
+			// file = next operand
+			break;
+
+		case 'b':
+			// blocking factor = next operand
+			break;
+
+		case 'l':
+			// report if links are unresolved
+			break;
+
+		case 'm':
+			// ignore mtimes
+			break;
+
+		case 'o':
+			// assign user and group to getuid() and getgid()
+			break;
+
+		default:
+			fprintf(stderr, "unknown key '%c'\n", argv[optind][i]);
+			return 1;
+		}
+	}
+
+	return 0;
+}
-- 
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