add rough outlines of cpio and tar interfaces

5 files changed, 197 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index c6bbc04..d2a9e54 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,12 @@
 
 CFLAGS=-Wall -Wextra -Wpedantic
 
+all: pax cpio tar
+
 pax: pax.o tar.o cpio.o
 
+tar cpio: pax
+	ln -sf pax $@
+
 clean:
 	rm -f $$(cat .gitignore)
diff --git a/cpio.c b/cpio.c
index d8be243..5aaae0f 100644
--- a/cpio.c
+++ b/cpio.c
@@ -24,10 +24,12 @@
 
 #define _XOPEN_SOURCE 700
 #include <cpio.h>
+#include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 #include "pax.h"
 
@@ -112,3 +114,86 @@ int cpio_list(FILE *input, size_t firstlen, void *firstblock)
 
 	return 0;
 }
+
+int cpio_main(int argc, char *argv[])
+{
+	setlocale(LC_ALL, "");
+	int c;
+
+	while ((c = getopt(argc, argv, "oip")) != -1) {
+		switch (c) {
+		case 'o':
+			// create
+			break;
+
+		case 'i':
+			// extract
+			break;
+
+		case 'p':
+			// copy?
+			break;
+
+		default:
+			return 1;
+		}
+
+		break;
+	}
+
+	for (size_t i = 2; argv[optind][i] != '\0'; i++) {
+		printf("checking %c\n", argv[optind][i]);
+		switch (argv[optind][i]) {
+		case 'a':
+			// reset atimes
+			break;
+
+		case 'B':
+			// blocksize 5120
+			break;
+
+		case 'd':
+			// create directories
+			break;
+
+		case 'c':
+			// read and write in character form for portability
+			break;
+
+		case 'r':
+			// interactively rename files
+			break;
+
+		case 't':
+			// list table of contents
+			break;
+
+		case 'u':
+			// copy unconditionally
+			break;
+
+		case 'v':
+			// verbose
+			break;
+
+		case 'l':
+			// link instead of copy, requires -p
+			break;
+
+		case 'm':
+			// reset mtime
+			break;
+
+		case 'f':
+			// ignore files in pattern
+			break;
+
+		default:
+			fprintf(stderr, "cpio: unknown option '%c'\n",
+				argv[optind][i]);
+			return 1;
+		}
+	}
+
+	return 0;
+}
diff --git a/pax.c b/pax.c
index 5e3be94..4cbd0f2 100644
--- a/pax.c
+++ b/pax.c
@@ -25,6 +25,7 @@
 #define _XOPEN_SOURCE 700
 #include <cpio.h>
 #include <errno.h>
+#include <libgen.h>
 #include <locale.h>
 #include <inttypes.h>
 #include <stdio.h>
@@ -82,7 +83,7 @@ int pax_list(FILE *input)
 	return 1;
 }
 
-int main(int argc, char *argv[])
+int pax_main(int argc, char *argv[])
 {
 	unsigned int flags = 0;
 	//unsigned int blocksize = 0;
@@ -200,6 +201,8 @@ int main(int argc, char *argv[])
 	if (mode == PAX_LIST) {
 		return pax_list(stdin);
 	}
+
+	return 1;
 }
 
 void pax_list_file(struct stat *st, const char *name)
@@ -267,3 +270,17 @@ uintmax_t pax_atoi(size_t n, const char _s[static n], int base)
 	strncpy(s, _s, n);
 	return strtoumax(s, NULL, base);
 }
+
+int main(int argc, char *argv[])
+{
+	char *base = basename(argv[0]);
+	if (!strcmp(base, "tar")) {
+		return tar_main(argc, argv);
+	}
+
+	if (!strcmp(base, "cpio")) {
+		return cpio_main(argc, argv);
+	}
+
+	return pax_main(argc, argv);
+}
diff --git a/pax.h b/pax.h
index 46ed1f9..3856ee4 100644
--- a/pax.h
+++ b/pax.h
@@ -23,6 +23,7 @@
  */
 
 #include <stdint.h>
+#include <sys/stat.h>
 
 #define TAR_HEADER_SIZE 512
 
@@ -70,4 +71,7 @@ int tar_list(FILE *input, size_t firstlen, void *firstblock);
 void pax_list_file(struct stat *st, const char *filename);
 uintmax_t pax_atoi(size_t n, const char s[static n], int base);
 
+int tar_main(int argc, char *argv[]);
+int cpio_main(int argc, char *argv[]);
+
 extern const size_t cpio_header_size;
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;
+}