Add initial version of lar to the archive.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-By: Stefan Reinauer  <stepan@coresystems.de> and others.


git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@39 f3766cd6-281f-0410-b1cd-43a5c92072e9

util/lar/Makefile

@@ -0,0 +1,45 @@
+#
+# lar makefile. This file is GPL. All rights reserved.
+#
+# (c) 2006 coresystems GmbH
+#
+
+SOURCE = lar.c create.c extract.c list.c lib.c
+
+CC=gcc
+CFLAGS=-O2 -Wall -W
+
+lar: $(SOURCE)
+	$(CC) $(CFLAGS) -o $@ $^
+	strip -s $@
+
+example: example.c
+	$(CC) $(CFLAGS) -o $@ $^
+
+clean:
+	rm -rf lar tree.lar tree tree2 example
+
+
+tree:
+	@printf "creating sample tree... "
+	@rm -rf tree
+	@mkdir tree
+	@mkdir -p tree/compression
+	@mkdir -p tree/normal
+	@mkdir -p tree/fallback
+	@dd if=/dev/urandom of=tree/compression/lzma bs=1k count=8 &>/dev/null
+	@dd if=/dev/urandom of=tree/normal/linuxbios.elf.lzma bs=1k count=32 &>/dev/null
+	@dd if=/dev/urandom of=tree/normal/initmem bs=1k count=16 &>/dev/null
+	@dd if=/dev/urandom of=tree/fallback/linuxbios.elf.lzma bs=1k count=32 &>/dev/null
+	@dd if=/dev/urandom of=tree/fallback/initmem bs=1k count=16 &>/dev/null
+	@printf "done.\n"
+
+tree.lar: lar tree
+	cd tree; ../lar c ../tree.lar `find . -type f|cut -c3-`
+
+test: lar example tree.lar
+	mkdir tree2; cd tree2; ../lar x ../tree.lar
+	@echo Comparing tree:
+	diff -urN tree tree2
+	@rm -rf tree tree2
+	./example tree.lar

util/lar/README

@@ -0,0 +1,87 @@
+LinuxBIOS Archiver: lar
+-----------------------
+
+TOC
+- Introduction
+- Usage
+- Archive format
+- TODO
+- ChangeLog
+
+Introduction
+------------
+
+This is a simple archiver, similar to cpio, ar or tar.
+
+Design goals were
+ - minimum overhead
+ - maximum fault tolerance
+ - simplicity
+
+For a usage example see example.c
+
+For questions contact Stefan Reinauer <stepan@coresystems.de>
+
+Usage
+-----
+
+Create archive archive.lar containting files file1 ... fileN
+
+  $ lar c archive.lar file1 ... fileN
+
+
+Extract files from archive.lar
+
+  $ lar x archive.lar [file1 .. fileN]
+
+List files in archive:
+
+  $ lar l archive.lar
+
+
+Archive format
+--------------
+
+The rough format is:
+
+ |--------------|
+ |  header      |
+ |--------------|
+ |  data        |
+ |--------------|
+ |  header      |
+ |--------------|
+ |  data        |
+ |--------------|
+  ...
+
+Headers have to be 16 byte aligned.
+
+ |--------------------|
+ |  magic (8byte)     |
+ |--------------------|
+ |  length (4byte)    |
+ |--------------------|
+ |  checksum (4byte)  |
+ |--------------------|
+ | offset to blob (4b)|
+ |--------------------|
+ | "path name"        | <-- null terminated, aligned to 16b
+ |--------------------|
+ | blob (aligned 16b) |
+ |--------------------|
+
+
+TODO
+----
+
+* reading flash layouts
+* This does not enforce any alignment yet
+* Alignment enforcing will be optional.
+
+
+ChangeLog
+
+2006/10/9
+ - inital version
+

util/lar/create.c

@@ -0,0 +1,126 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <netinet/in.h>
+
+#include "lib.h"
+#include "lar.h"
+
+int create_lar(int argc, char *argv[])
+{
+	int i, ret;
+	FILE *archive, *source;
+	char *archivename;
+	char *tempmem;
+	char *filebuf;
+	char *pathname;
+	u32 *walk;
+	u32 csum;
+	int pathlen, entrylen, filelen;
+	struct lar_header  *header;
+	struct stat statbuf;
+
+	archivename=argv[2];
+	if (argc<=3) {
+		printf("No files for archive %s\n", archivename);
+		exit(1);
+	}
+
+	printf("Opening %s\n", archivename);
+	archive=fopen(archivename, "w");
+	if(!archive) {
+	// error
+		exit(1);
+	}
+
+	for (i=3; i<argc; i++) {
+		printf("  Adding %s to archive\n", argv[i]);
+
+		ret=stat(argv[i], &statbuf);
+		if(ret) {
+			printf(" no such file %s\n", argv[i]);
+			exit(1);
+		}
+		filelen=statbuf.st_size;
+
+		tempmem=malloc(sizeof(struct lar_header)+MAX_PATHLEN+filelen+16);
+		if(!tempmem) {
+			printf ("no memory\n");
+			return (1);
+		}
+		memset(tempmem, 0, sizeof(struct lar_header)+MAX_PATHLEN+filelen+16);
+
+		header=(struct lar_header *)tempmem;
+		pathname=tempmem+sizeof(struct lar_header);
+		pathlen=sprintf(pathname, argv[i])+1;
+		pathlen = (pathlen+15)&0xfffffff0; // align it to 16 bytes
+
+		/* read file into memory */
+		filebuf=pathname+pathlen;
+		source=fopen(argv[i], "r");
+		if(!source) {
+		
+			printf(" no such file %s\n", argv[i]);
+			exit(1);
+		}
+		fread(filebuf, statbuf.st_size, 1, source);
+		fclose(source);
+
+		/* create correct header */
+		memcpy(header, MAGIC, 8);
+		header->len=htonl(statbuf.st_size);
+		header->offset=htonl(sizeof(struct lar_header)+pathlen);
+
+		/* calculate checksum */
+		csum=0;
+		for (walk=(u32 *)tempmem; 
+		  walk<(u32 *)(tempmem+ statbuf.st_size+sizeof(struct lar_header)+pathlen);
+		  walk++) {
+			csum+=ntohl(*walk);
+		}
+		header->checksum=htonl(csum);
+
+		/* write out entry to archive */
+		entrylen=(filelen+pathlen+sizeof(struct lar_header)+15) & 0xfffffff0;
+
+		fwrite(tempmem, entrylen, 1, archive);
+
+		free(tempmem);
+
+	}
+
+	fclose(archive);
+	printf("done.\n");
+
+	return 0;
+}
+
+

util/lar/create.h

@@ -0,0 +1,28 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#ifndef __LAR_CREATE_H
+#define __LAR_CREATE_H 1
+
+int create_lar(int argc, char *argv[]);
+
+#endif

util/lar/example.c

@@ -0,0 +1,124 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ *  This file may be dual licensed with the new BSD license.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <netinet/in.h>
+
+#include "lar.h"
+
+struct mem_file {
+	char *start;
+	int len;
+};
+
+int find_file(struct mem_file *archive, char *filename, struct mem_file *result)
+{
+	char * walk, *fullname;
+	struct lar_header * header;
+	
+	for (walk = archive->start; walk < archive->start + 
+			archive->len; walk+=16) {
+
+		if(strcmp(walk, MAGIC)!=0)
+			continue;
+
+		header=(struct lar_header *)walk;
+		fullname=walk+sizeof(struct lar_header);
+
+		// FIXME: check checksum
+		
+		if(strcmp(fullname, filename)!=0) {
+			result->start=walk + ntohl(header->offset);
+			result->len=ntohl(header->len);
+			return 0;
+		}
+
+		// skip file
+		walk += ( ntohl(header->offset) + ntohl(header->len)
+				+ 15 ) & 0xfffffff0;
+	}
+
+	return 1;
+}
+
+
+
+int main(int argc, char *argv[])
+{
+	int fd, ret;
+	struct stat statbuf;
+	struct mem_file archive, result;
+
+	if (argc!=2) {
+		printf("Usage: example archive.lar\n");
+		exit(0);
+	}
+
+	if (stat(argv[1], &statbuf)!=0) {
+		printf("Error opening %s: %s\n", 
+				argv[1], strerror(errno));
+		exit(1);
+	}
+	printf("Opening %s\n", argv[1]);
+
+	fd=open(argv[1], O_RDONLY);
+	if (fd==-1) {
+		printf("Error while opening %s: %s\n", 
+				argv[1], strerror(errno));
+		exit(1);
+	}
+	archive.len=statbuf.st_size;
+
+	archive.start=mmap(NULL, statbuf.st_size, PROT_READ,
+			MAP_SHARED, fd, 0);
+	/* OS stuff ends here */
+	/* ------------------------------------------------- */
+
+	// find first compressor
+	ret=find_file(&archive, "compression/", &result);
+	if(!ret) printf("file found.\n");
+	else printf("file not found.\n");
+
+	ret=find_file(&archive, "normal/initram", &result);
+	if(!ret) printf("file found.\n");
+	else printf("file not found.\n");
+
+
+	/* ------------------------------------------------- */
+	/* OS stuff starts again here */
+	munmap(archive.start, archive.len);
+	close(fd);
+
+	return 0;
+}
+
+

util/lar/extract.c

@@ -0,0 +1,127 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <netinet/in.h>
+
+#include "lib.h"
+#include "lar.h"
+
+int extract_lar(int argc, char *argv[])
+{
+	int archivefile;
+	char * archivename;
+	char * inmap;
+	char * walk;
+	char *fullname, *pathname, *pos;
+	struct lar_header * header;
+	struct stat statbuf;
+	int archivelen;
+	int do_extract;
+	int i;
+
+	archivename=argv[2];
+
+	if (stat(archivename, &statbuf)!=0) {
+		printf("Error opening %s: %s\n", 
+				archivename, strerror(errno));
+		exit(1);
+	}
+	printf("Opening %s\n", archivename);
+
+	archivefile=open(archivename, O_RDONLY);
+	if (archivefile==-1) {
+		printf("Error while opening %s: %s\n", 
+				archivename, strerror(errno));
+		exit(1);
+	}
+	archivelen=statbuf.st_size;
+
+		
+	inmap=mmap(NULL, statbuf.st_size, PROT_READ,
+			MAP_SHARED, archivefile, 0);
+
+	for (walk=inmap; walk<inmap+statbuf.st_size; walk+=16) {
+		FILE * file_to_extract;
+
+		if(strcmp(walk, MAGIC)!=0)
+			continue;
+
+		header=(struct lar_header *)walk;
+		fullname=walk+sizeof(struct lar_header);
+		
+		// FIXME: check checksum
+
+		do_extract=1;
+		if(argc>3) {
+			do_extract=0;
+			for (i=3; i<argc; i++) {
+				if(strcmp(fullname, argv[i])==0) {
+					do_extract=1;
+					break;
+				}
+			}
+		}
+
+		// dont extract this one, skip it.
+		if(!do_extract) 
+			continue;
+
+		printf("  Extracting file %s\n", walk+sizeof(struct lar_header));
+
+		// Create the directory if it does not exist.
+		pathname=strdup(fullname);
+		pos=strrchr(pathname, '/');
+		if(pos) {
+			pos[1]=0;
+			//printf("pathname %s\n",pathname);
+			mkdirp(pathname);
+		}
+		free(pathname);
+
+		file_to_extract=fopen(fullname, "w");
+		if(!file_to_extract) {
+			printf("error creating file.\n");
+			exit(1);
+		}
+		//printf("starting offs=%d, len=%d\n", ntohl(header->offset),
+		//		ntohl(header->len));
+		fwrite(walk+ntohl(header->offset), ntohl(header->len),
+				1, file_to_extract);
+		fclose(file_to_extract);
+	}
+	munmap(inmap, statbuf.st_size);
+	close(archivefile);
+	printf("done.\n");
+
+	return 0;
+}
+
+

util/lar/extract.h

@@ -0,0 +1,28 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#ifndef __LAR_EXTRACT_H
+#define __LAR_EXTRACT_H 1
+
+int extract_lar(int argc, char *argv[]);
+
+#endif

util/lar/lar.c

@@ -0,0 +1,58 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+
+#include "lib.h"
+#include "lar.h"
+#include "create.h"
+#include "extract.h"
+#include "list.h"
+
+int main(int argc, char *argv[])
+{
+	if (argc<2) {
+		printf("Usage: lar [cxl] archive.lar <files>\n");
+		exit(0);
+	}
+
+	if (strcmp(argv[1], "x")==0)
+		extract_lar(argc, argv);
+	else if (strcmp(argv[1], "c")==0)
+		create_lar(argc,argv);
+	else if (strcmp(argv[1], "l")==0)
+		list_lar(argc,argv);
+	else {
+		printf("mode must be c or x\n");
+		exit(1);
+	}
+
+	return 0;
+}

util/lar/lar.h

@@ -0,0 +1,39 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ *  This file may be dual licensed with the new BSD license.
+ *
+ */
+
+#include <stdint.h>
+
+#define MAGIC "LARCHIVE"
+#define MAX_PATHLEN 1024
+
+typedef uint32_t u32;
+
+struct lar_header {
+	char magic[8];
+	u32 len;
+	u32 checksum;
+	u32 offset;
+};
+
+

util/lar/lib.c

@@ -0,0 +1,75 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+int mkdirp(char *dirpath)
+{
+#define MAX_PATH 1024
+	char *pos, *currpath, *path;
+	char cwd[MAX_PATH];
+	int ret=0;
+
+	path = strdup(dirpath);
+	currpath = path;
+
+	if(!getcwd(cwd, MAX_PATH)) {
+		free(path);
+		printf("error getting cwd\n");
+		return -1;
+	}
+
+	do {
+		pos=index(currpath,'/');
+		if (pos)*pos=0;
+
+		//printf("cp=%s\n",currpath);
+		mkdir(currpath,0755);
+		ret=chdir(currpath);
+		
+		if(pos) currpath=pos+1;
+	} while (pos && !ret && strlen(currpath)) ;
+
+	chdir(cwd);
+	free(path);
+
+	return ret;
+}
+
+#if 0
+int main(void) {
+	int ret;
+	ret=mkdirp("a/b/c/d/");
+	if (ret) printf("error! mkdir\n\n");
+	else printf("jippie! mkdir\n\n");
+	ret=mkdirp("a/b/c/d");
+	if (ret) printf("error! mkdir\n");
+	else printf("jippie! mkdir\n");
+
+	return 0;
+}
+#endif

util/lar/lib.h

@@ -0,0 +1,28 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#ifndef __LAR_LIB_H
+#define __LAR_LIB_H 1
+
+int mkdirp(char *dirpath);
+
+#endif

util/lar/list.c

@@ -0,0 +1,105 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <netinet/in.h>
+
+#include "lib.h"
+#include "lar.h"
+
+int list_lar(int argc, char *argv[])
+{
+	int archivefile;
+	char * archivename;
+	char * inmap;
+	char * walk;
+	char *fullname;
+	struct lar_header * header;
+	struct stat statbuf;
+	int archivelen;
+	int do_extract;
+	int i;
+
+	archivename=argv[2];
+
+	if (stat(archivename, &statbuf)!=0) {
+		printf("Error opening %s: %s\n", 
+				archivename, strerror(errno));
+		exit(1);
+	}
+	printf("Opening %s\n", archivename);
+
+	archivefile=open(archivename, O_RDONLY);
+	if (archivefile==-1) {
+		printf("Error while opening %s: %s\n", 
+				archivename, strerror(errno));
+		exit(1);
+	}
+	archivelen=statbuf.st_size;
+
+		
+	inmap=mmap(NULL, statbuf.st_size, PROT_READ,
+			MAP_SHARED, archivefile, 0);
+
+	for (walk=inmap; walk<inmap+statbuf.st_size; walk+=16) {
+		if(strcmp(walk, MAGIC)!=0)
+			continue;
+
+		header=(struct lar_header *)walk;
+		fullname=walk+sizeof(struct lar_header);
+		
+		do_extract=1;
+		if(argc>3) {
+			do_extract=0;
+			for (i=3; i<argc; i++) {
+				if(strcmp(fullname, argv[i])==0) {
+					do_extract=1;
+					break;
+				}
+			}
+		}
+
+		// dont extract this one, skip it.
+		if(!do_extract) 
+			continue;
+
+		printf("  %s ", walk+sizeof(struct lar_header));
+
+		printf("(%d bytes @0x%lx)\n", ntohl(header->len),
+				(walk-inmap)+ntohl(header->offset));
+	}
+	munmap(inmap, statbuf.st_size);
+	close(archivefile);
+	printf("done.\n");
+
+	return 0;
+}
+
+

util/lar/list.h

@@ -0,0 +1,28 @@
+/*
+ *  lar - linuxbios archiver
+ *
+ *  written by Stefan Reinauer <stepan@coresystems.de>
+ *
+ *  (C) 2006 coresystems GmbH. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; version 2 of the License.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ *
+ */
+
+#ifndef __LAR_LIST_H
+#define __LAR_LIST_H 1
+
+int list_lar(int argc, char *argv[]);
+
+#endif