Initial groundwork

.gitignore

@@ -52,3 +52,6 @@ Module.symvers
 Mkfile.old
 dkms.conf
 
+obj/
+libmtar.a
+.vscode/

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) <year> <owner> 
+Copyright (c) 2022, apio
 
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 

Makefile

@@ -0,0 +1,35 @@
+OUTPUT ?= .
+LIBNAME ?= libmtar
+OBJDIR ?= obj
+SRC := src
+
+CC ?= gcc
+AR ?= ar
+CFLAGS ?= -O2 -Wall -Wextra
+CFLAGS := ${CFLAGS} -I.
+DESTDIR ?= /usr/local/lib
+
+OBJS := $(OBJDIR)/tar.o
+
+build: $(OBJS)
+	@echo -- Creating $(LIBNAME).a
+	@mkdir -p $(OUTPUT)
+	$(AR) rcs $(OUTPUT)/$(LIBNAME).a $(OBJS)
+
+$(OBJDIR)/%.o: $(SRC)/%.c
+	@echo -- Compiling $^
+	@mkdir -p $(@D)
+	$(CC) $(CFLAGS) -o $@ -c $^
+
+install:
+	@echo -- Installing $(LIBNAME).a
+	@mkdir -p $(DESTDIR)
+	cp $(OUTPUT)/$(LIBNAME).a $(DESTDIR)
+
+clean:
+	rm -f $(OBJDIR)/*.o
+	rm -f $(OUTPUT)/$(LIBNAME).a
+
+uninstall:
+	@echo -- Removing $(LIBNAME).a
+	rm -f $(DESTDIR)/$(LIBNAME).a

minitar.h

@@ -0,0 +1,13 @@
+#ifndef MINITAR_H
+#define MINITAR_H
+#include <stdio.h>
+
+struct minitar
+{
+    FILE* stream;
+};
+
+struct minitar* minitar_open(const char* pathname);
+int minitar_close(struct minitar* mp);
+
+#endif

src/tar.c

@@ -0,0 +1,20 @@
+#include <stdlib.h>
+#include "minitar.h"
+
+struct minitar* minitar_open(const char* path)
+{
+    FILE* fp = fopen(path, "r");
+    if(!fp) return NULL;
+    struct minitar* mp = malloc(sizeof(struct minitar));
+    if(!mp) { fclose(fp); return NULL; }
+    mp->stream = fp;
+    return mp;
+}
+
+int minitar_close(struct minitar* mp)
+{
+    int rc = fclose(mp->stream);
+    free(mp);
+    if(rc) return rc;
+    return 0;
+}