scripts/mod/sumversion.c - linux - Git at Google

 #include <netinet/in.h>
 #ifdef __sun__
 #include <inttypes.h>
 #else
 #include <stdint.h>
 #endif
 #include <ctype.h>
 #include <errno.h>
 #include <string.h>
 #include <limits.h>
 #include "modpost.h"

 /*
  * Stolen form Cryptographic API.
  *
  * MD4 Message Digest Algorithm (RFC1320).
  *
  * Implementation derived from Andrew Tridgell and Steve French's
  * CIFS MD4 implementation, and the cryptoapi implementation
  * originally based on the public domain implementation written
  * by Colin Plumb in 1993.
  *
  * Copyright (c) Andrew Tridgell 1997-1998.
  * Modified by Steve French (sfrench@us.ibm.com) 2002
  * Copyright (c) Cryptoapi developers.
  * Copyright (c) 2002 David S. Miller (davem@redhat.com)
  * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
  *
  * 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; either version 2 of the License, or
  * (at your option) any later version.
  *
  */
 #define MD4_DIGEST_SIZE		16
 #define MD4_HMAC_BLOCK_SIZE	64
 #define MD4_BLOCK_WORDS		16
 #define MD4_HASH_WORDS		4

 struct md4_ctx {
 	uint32_t hash[MD4_HASH_WORDS];
 	uint32_t block[MD4_BLOCK_WORDS];
 	uint64_t byte_count;
 };

 static inline uint32_t lshift(uint32_t x, unsigned int s)
 {
 	x &= 0xFFFFFFFF;
 	return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s));
 }

 static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z)
 {
 	return (x & y) | ((~x) & z);
 }

 static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z)
 {
 	return (x & y) | (x & z) | (y & z);
 }

 static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z)
 {
 	return x ^ y ^ z;
 }

 #define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s))
 #define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (uint32_t)0x5A827999,s))
 #define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (uint32_t)0x6ED9EBA1,s))

 /* XXX: this stuff can be optimized */
 static inline void le32_to_cpu_array(uint32_t *buf, unsigned int words)
 {
 	while (words--) {
 		*buf = ntohl(*buf);
 		buf++;
 	}
 }

 static inline void cpu_to_le32_array(uint32_t *buf, unsigned int words)
 {
 	while (words--) {
 		*buf = htonl(*buf);
 		buf++;
 	}
 }

 static void md4_transform(uint32_t *hash, uint32_t const *in)
 {
 	uint32_t a, b, c, d;

 	a = hash[0];
 	b = hash[1];
 	c = hash[2];
 	d = hash[3];

 	ROUND1(a, b, c, d, in[0], 3);
 	ROUND1(d, a, b, c, in[1], 7);
 	ROUND1(c, d, a, b, in[2], 11);
 	ROUND1(b, c, d, a, in[3], 19);
 	ROUND1(a, b, c, d, in[4], 3);
 	ROUND1(d, a, b, c, in[5], 7);
 	ROUND1(c, d, a, b, in[6], 11);
 	ROUND1(b, c, d, a, in[7], 19);
 	ROUND1(a, b, c, d, in[8], 3);
 	ROUND1(d, a, b, c, in[9], 7);
 	ROUND1(c, d, a, b, in[10], 11);
 	ROUND1(b, c, d, a, in[11], 19);
 	ROUND1(a, b, c, d, in[12], 3);
 	ROUND1(d, a, b, c, in[13], 7);
 	ROUND1(c, d, a, b, in[14], 11);
 	ROUND1(b, c, d, a, in[15], 19);

 	ROUND2(a, b, c, d,in[ 0], 3);
 	ROUND2(d, a, b, c, in[4], 5);
 	ROUND2(c, d, a, b, in[8], 9);
 	ROUND2(b, c, d, a, in[12], 13);
 	ROUND2(a, b, c, d, in[1], 3);
 	ROUND2(d, a, b, c, in[5], 5);
 	ROUND2(c, d, a, b, in[9], 9);
 	ROUND2(b, c, d, a, in[13], 13);
 	ROUND2(a, b, c, d, in[2], 3);
 	ROUND2(d, a, b, c, in[6], 5);
 	ROUND2(c, d, a, b, in[10], 9);
 	ROUND2(b, c, d, a, in[14], 13);
 	ROUND2(a, b, c, d, in[3], 3);
 	ROUND2(d, a, b, c, in[7], 5);
 	ROUND2(c, d, a, b, in[11], 9);
 	ROUND2(b, c, d, a, in[15], 13);

 	ROUND3(a, b, c, d,in[ 0], 3);
 	ROUND3(d, a, b, c, in[8], 9);
 	ROUND3(c, d, a, b, in[4], 11);
 	ROUND3(b, c, d, a, in[12], 15);
 	ROUND3(a, b, c, d, in[2], 3);
 	ROUND3(d, a, b, c, in[10], 9);
 	ROUND3(c, d, a, b, in[6], 11);
 	ROUND3(b, c, d, a, in[14], 15);
 	ROUND3(a, b, c, d, in[1], 3);
 	ROUND3(d, a, b, c, in[9], 9);
 	ROUND3(c, d, a, b, in[5], 11);
 	ROUND3(b, c, d, a, in[13], 15);
 	ROUND3(a, b, c, d, in[3], 3);
 	ROUND3(d, a, b, c, in[11], 9);
 	ROUND3(c, d, a, b, in[7], 11);
 	ROUND3(b, c, d, a, in[15], 15);

 	hash[0] += a;
 	hash[1] += b;
 	hash[2] += c;
 	hash[3] += d;
 }

 static inline void md4_transform_helper(struct md4_ctx *ctx)
 {
 	le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(uint32_t));
 	md4_transform(ctx->hash, ctx->block);
 }

 static void md4_init(struct md4_ctx *mctx)
 {
 	mctx->hash[0] = 0x67452301;
 	mctx->hash[1] = 0xefcdab89;
 	mctx->hash[2] = 0x98badcfe;
 	mctx->hash[3] = 0x10325476;
 	mctx->byte_count = 0;
 }

 static void md4_update(struct md4_ctx *mctx,
 		       const unsigned char *data, unsigned int len)
 {
 	const uint32_t avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);

 	mctx->byte_count += len;

 	if (avail > len) {
 		memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
 		       data, len);
 		return;
 	}

 	memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
 	       data, avail);

 	md4_transform_helper(mctx);
 	data += avail;
 	len -= avail;

 	while (len >= sizeof(mctx->block)) {
 		memcpy(mctx->block, data, sizeof(mctx->block));
 		md4_transform_helper(mctx);
 		data += sizeof(mctx->block);
 		len -= sizeof(mctx->block);
 	}

 	memcpy(mctx->block, data, len);
 }

 static void md4_final_ascii(struct md4_ctx *mctx, char *out, unsigned int len)
 {
 	const unsigned int offset = mctx->byte_count & 0x3f;
 	char *p = (char *)mctx->block + offset;
 	int padding = 56 - (offset + 1);

 	*p++ = 0x80;
 	if (padding < 0) {
 		memset(p, 0x00, padding + sizeof (uint64_t));
 		md4_transform_helper(mctx);
 		p = (char *)mctx->block;
 		padding = 56;
 	}

 	memset(p, 0, padding);
 	mctx->block[14] = mctx->byte_count << 3;
 	mctx->block[15] = mctx->byte_count >> 29;
 	le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
 			  sizeof(uint64_t)) / sizeof(uint32_t));
 	md4_transform(mctx->hash, mctx->block);
 	cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(uint32_t));

 	snprintf(out, len, "%08X%08X%08X%08X",
 		 mctx->hash[0], mctx->hash[1], mctx->hash[2], mctx->hash[3]);
 }

 static inline void add_char(unsigned char c, struct md4_ctx *md)
 {
 	md4_update(md, &c, 1);
 }

 static int parse_string(const char *file, unsigned long len,
 			struct md4_ctx *md)
 {
 	unsigned long i;

 	add_char(file[0], md);
 	for (i = 1; i < len; i++) {
 		add_char(file[i], md);
 		if (file[i] == '"' && file[i-1] != '\\')
 			break;
 	}
 	return i;
 }

 static int parse_comment(const char *file, unsigned long len)
 {
 	unsigned long i;

 	for (i = 2; i < len; i++) {
 		if (file[i-1] == '*' && file[i] == '/')
 			break;
 	}
 	return i;
 }

 /* FIXME: Handle .s files differently (eg. # starts comments) --RR */
 static int parse_file(const char *fname, struct md4_ctx *md)
 {
 	char *file;
 	unsigned long i, len;

 	file = read_text_file(fname);
 	len = strlen(file);

 	for (i = 0; i < len; i++) {
 		/* Collapse and ignore \ and CR. */
 		if (file[i] == '\\' && (i+1 < len) && file[i+1] == '\n') {
 			i++;
 			continue;
 		}

 		/* Ignore whitespace */
 		if (isspace(file[i]))
 			continue;

 		/* Handle strings as whole units */
 		if (file[i] == '"') {
 			i += parse_string(file+i, len - i, md);
 			continue;
 		}

 		/* Comments: ignore */
 		if (file[i] == '/' && file[i+1] == '*') {
 			i += parse_comment(file+i, len - i);
 			continue;
 		}

 		add_char(file[i], md);
 	}
 	free(file);
 	return 1;
 }
 /* Check whether the file is a static library or not */
 static int is_static_library(const char *objfile)
 {
 	int len = strlen(objfile);
 	if (objfile[len - 2] == '.' && objfile[len - 1] == 'a')
 		return 1;
 	else
 		return 0;
 }

 /* We have dir/file.o.  Open dir/.file.o.cmd, look for source_ and deps_ line
  * to figure out source files. */
 static int parse_source_files(const char *objfile, struct md4_ctx *md)
 {
 	char *cmd, *file, *line, *dir, *pos;
 	const char *base;
 	int dirlen, ret = 0, check_files = 0;

 	cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd")));

 	base = strrchr(objfile, '/');
 	if (base) {
 		base++;
 		dirlen = base - objfile;
 		sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base);
 	} else {
 		dirlen = 0;
 		sprintf(cmd, ".%s.cmd", objfile);
 	}
 	dir = NOFAIL(malloc(dirlen + 1));
 	strncpy(dir, objfile, dirlen);
 	dir[dirlen] = '\0';

 	file = read_text_file(cmd);

 	pos = file;

 	/* Sum all files in the same dir or subdirs. */
 	while ((line = get_line(&pos))) {
 		char* p = line;

 		if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
 			p = strrchr(line, ' ');
 			if (!p) {
 				warn("malformed line: %s\n", line);
 				goto out_file;
 			}
 			p++;
 			if (!parse_file(p, md)) {
 				warn("could not open %s: %s\n",
 				     p, strerror(errno));
 				goto out_file;
 			}
 			continue;
 		}
 		if (strncmp(line, "deps_", sizeof("deps_")-1) == 0) {
 			check_files = 1;
 			continue;
 		}
 		if (!check_files)
 			continue;

 		/* Continue until line does not end with '\' */
 		if ( *(p + strlen(p)-1) != '\\')
 			break;
 		/* Terminate line at first space, to get rid of final ' \' */
 		while (*p) {
 			if (isspace(*p)) {
 				*p = '\0';
 				break;
 			}
 			p++;
 		}

 		/* Check if this file is in same dir as objfile */
 		if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) {
 			if (!parse_file(line, md)) {
 				warn("could not open %s: %s\n",
 				     line, strerror(errno));
 				goto out_file;
 			}

 		}

 	}

 	/* Everyone parsed OK */
 	ret = 1;
 out_file:
 	free(file);
 	free(dir);
 	free(cmd);
 	return ret;
 }

 /* Calc and record src checksum. */
 void get_src_version(const char *modname, char sum[], unsigned sumlen)
 {
 	char *buf, *pos, *firstline;
 	struct md4_ctx md;
 	char *fname;
 	char filelist[PATH_MAX + 1];

 	/* objects for a module are listed in the first line of *.mod file. */
 	snprintf(filelist, sizeof(filelist), "%s.mod", modname);

 	buf = read_text_file(filelist);

 	pos = buf;
 	firstline = get_line(&pos);
 	if (!firstline) {
 		warn("bad ending versions file for %s\n", modname);
 		goto free;
 	}

 	md4_init(&md);
 	while ((fname = strsep(&firstline, " "))) {
 		if (!*fname)
 			continue;
 		if (!(is_static_library(fname)) &&
 				!parse_source_files(fname, &md))
 			goto free;
 	}

 	md4_final_ascii(&md, sum, sumlen);
 free:
 	free(buf);
 }
	#include <netinet/in.h>
	#ifdef __sun__
	#include <inttypes.h>
	#else
	#include <stdint.h>
	#endif
	#include <ctype.h>
	#include <errno.h>
	#include <string.h>
	#include <limits.h>
	#include "modpost.h"

	/*
	* Stolen form Cryptographic API.
	*
	* MD4 Message Digest Algorithm (RFC1320).
	*
	* Implementation derived from Andrew Tridgell and Steve French's
	* CIFS MD4 implementation, and the cryptoapi implementation
	* originally based on the public domain implementation written
	* by Colin Plumb in 1993.
	*
	* Copyright (c) Andrew Tridgell 1997-1998.
	* Modified by Steve French (sfrench@us.ibm.com) 2002
	* Copyright (c) Cryptoapi developers.
	* Copyright (c) 2002 David S. Miller (davem@redhat.com)
	* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
	*
	* 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; either version 2 of the License, or
	* (at your option) any later version.
	*
	*/
	#define MD4_DIGEST_SIZE 16
	#define MD4_HMAC_BLOCK_SIZE 64
	#define MD4_BLOCK_WORDS 16
	#define MD4_HASH_WORDS 4

	struct md4_ctx {
	uint32_t hash[MD4_HASH_WORDS];
	uint32_t block[MD4_BLOCK_WORDS];
	uint64_t byte_count;
	};

	static inline uint32_t lshift(uint32_t x, unsigned int s)
	{
	x &= 0xFFFFFFFF;
	return ((x << s) & 0xFFFFFFFF) \| (x >> (32 - s));
	}

	static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z)
	{
	return (x & y) \| ((~x) & z);
	}

	static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z)
	{
	return (x & y) \| (x & z) \| (y & z);
	}

	static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z)
	{
	return x ^ y ^ z;
	}

	#define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s))
	#define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (uint32_t)0x5A827999,s))
	#define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (uint32_t)0x6ED9EBA1,s))

	/* XXX: this stuff can be optimized */
	static inline void le32_to_cpu_array(uint32_t *buf, unsigned int words)
	{
	while (words--) {
	buf = ntohl(buf);
	buf++;
	}
	}

	static inline void cpu_to_le32_array(uint32_t *buf, unsigned int words)
	{
	while (words--) {
	buf = htonl(buf);
	buf++;
	}
	}

	static void md4_transform(uint32_t hash, uint32_t const in)
	{
	uint32_t a, b, c, d;

	a = hash[0];
	b = hash[1];
	c = hash[2];
	d = hash[3];

	ROUND1(a, b, c, d, in[0], 3);
	ROUND1(d, a, b, c, in[1], 7);
	ROUND1(c, d, a, b, in[2], 11);
	ROUND1(b, c, d, a, in[3], 19);
	ROUND1(a, b, c, d, in[4], 3);
	ROUND1(d, a, b, c, in[5], 7);
	ROUND1(c, d, a, b, in[6], 11);
	ROUND1(b, c, d, a, in[7], 19);
	ROUND1(a, b, c, d, in[8], 3);
	ROUND1(d, a, b, c, in[9], 7);
	ROUND1(c, d, a, b, in[10], 11);
	ROUND1(b, c, d, a, in[11], 19);
	ROUND1(a, b, c, d, in[12], 3);
	ROUND1(d, a, b, c, in[13], 7);
	ROUND1(c, d, a, b, in[14], 11);
	ROUND1(b, c, d, a, in[15], 19);

	ROUND2(a, b, c, d,in[ 0], 3);
	ROUND2(d, a, b, c, in[4], 5);
	ROUND2(c, d, a, b, in[8], 9);
	ROUND2(b, c, d, a, in[12], 13);
	ROUND2(a, b, c, d, in[1], 3);
	ROUND2(d, a, b, c, in[5], 5);
	ROUND2(c, d, a, b, in[9], 9);
	ROUND2(b, c, d, a, in[13], 13);
	ROUND2(a, b, c, d, in[2], 3);
	ROUND2(d, a, b, c, in[6], 5);
	ROUND2(c, d, a, b, in[10], 9);
	ROUND2(b, c, d, a, in[14], 13);
	ROUND2(a, b, c, d, in[3], 3);
	ROUND2(d, a, b, c, in[7], 5);
	ROUND2(c, d, a, b, in[11], 9);
	ROUND2(b, c, d, a, in[15], 13);

	ROUND3(a, b, c, d,in[ 0], 3);
	ROUND3(d, a, b, c, in[8], 9);
	ROUND3(c, d, a, b, in[4], 11);
	ROUND3(b, c, d, a, in[12], 15);
	ROUND3(a, b, c, d, in[2], 3);
	ROUND3(d, a, b, c, in[10], 9);
	ROUND3(c, d, a, b, in[6], 11);
	ROUND3(b, c, d, a, in[14], 15);
	ROUND3(a, b, c, d, in[1], 3);
	ROUND3(d, a, b, c, in[9], 9);
	ROUND3(c, d, a, b, in[5], 11);
	ROUND3(b, c, d, a, in[13], 15);
	ROUND3(a, b, c, d, in[3], 3);
	ROUND3(d, a, b, c, in[11], 9);
	ROUND3(c, d, a, b, in[7], 11);
	ROUND3(b, c, d, a, in[15], 15);

	hash[0] += a;
	hash[1] += b;
	hash[2] += c;
	hash[3] += d;
	}

	static inline void md4_transform_helper(struct md4_ctx *ctx)
	{
	le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(uint32_t));
	md4_transform(ctx->hash, ctx->block);
	}

	static void md4_init(struct md4_ctx *mctx)
	{
	mctx->hash[0] = 0x67452301;
	mctx->hash[1] = 0xefcdab89;
	mctx->hash[2] = 0x98badcfe;
	mctx->hash[3] = 0x10325476;
	mctx->byte_count = 0;
	}

	static void md4_update(struct md4_ctx *mctx,
	const unsigned char *data, unsigned int len)
	{
	const uint32_t avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);

	mctx->byte_count += len;

	if (avail > len) {
	memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
	data, len);
	return;
	}

	memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
	data, avail);

	md4_transform_helper(mctx);
	data += avail;
	len -= avail;

	while (len >= sizeof(mctx->block)) {
	memcpy(mctx->block, data, sizeof(mctx->block));
	md4_transform_helper(mctx);
	data += sizeof(mctx->block);
	len -= sizeof(mctx->block);
	}

	memcpy(mctx->block, data, len);
	}

	static void md4_final_ascii(struct md4_ctx mctx, char out, unsigned int len)
	{
	const unsigned int offset = mctx->byte_count & 0x3f;
	char p = (char )mctx->block + offset;
	int padding = 56 - (offset + 1);

	*p++ = 0x80;
	if (padding < 0) {
	memset(p, 0x00, padding + sizeof (uint64_t));
	md4_transform_helper(mctx);
	p = (char *)mctx->block;
	padding = 56;
	}

	memset(p, 0, padding);
	mctx->block[14] = mctx->byte_count << 3;
	mctx->block[15] = mctx->byte_count >> 29;
	le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
	sizeof(uint64_t)) / sizeof(uint32_t));
	md4_transform(mctx->hash, mctx->block);
	cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(uint32_t));

	snprintf(out, len, "%08X%08X%08X%08X",
	mctx->hash[0], mctx->hash[1], mctx->hash[2], mctx->hash[3]);
	}

	static inline void add_char(unsigned char c, struct md4_ctx *md)
	{
	md4_update(md, &c, 1);
	}

	static int parse_string(const char *file, unsigned long len,
	struct md4_ctx *md)
	{
	unsigned long i;

	add_char(file[0], md);
	for (i = 1; i < len; i++) {
	add_char(file[i], md);
	if (file[i] == '"' && file[i-1] != '\\')
	break;
	}
	return i;
	}

	static int parse_comment(const char *file, unsigned long len)
	{
	unsigned long i;

	for (i = 2; i < len; i++) {
	if (file[i-1] == '*' && file[i] == '/')
	break;
	}
	return i;
	}

	/* FIXME: Handle .s files differently (eg. # starts comments) --RR */
	static int parse_file(const char fname, struct md4_ctx md)
	{
	char *file;
	unsigned long i, len;

	file = read_text_file(fname);
	len = strlen(file);

	for (i = 0; i < len; i++) {
	/* Collapse and ignore \ and CR. */
	if (file[i] == '\\' && (i+1 < len) && file[i+1] == '\n') {
	i++;
	continue;
	}

	/* Ignore whitespace */
	if (isspace(file[i]))
	continue;

	/* Handle strings as whole units */
	if (file[i] == '"') {
	i += parse_string(file+i, len - i, md);
	continue;
	}

	/* Comments: ignore */
	if (file[i] == '/' && file[i+1] == '*') {
	i += parse_comment(file+i, len - i);
	continue;
	}

	add_char(file[i], md);
	}
	free(file);
	return 1;
	}
	/* Check whether the file is a static library or not */
	static int is_static_library(const char *objfile)
	{
	int len = strlen(objfile);
	if (objfile[len - 2] == '.' && objfile[len - 1] == 'a')
	return 1;
	else
	return 0;
	}

	/* We have dir/file.o. Open dir/.file.o.cmd, look for source_ and deps_ line
	* to figure out source files. */
	static int parse_source_files(const char objfile, struct md4_ctx md)
	{
	char cmd, file, line, dir, *pos;
	const char *base;
	int dirlen, ret = 0, check_files = 0;

	cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd")));

	base = strrchr(objfile, '/');
	if (base) {
	base++;
	dirlen = base - objfile;
	sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base);
	} else {
	dirlen = 0;
	sprintf(cmd, ".%s.cmd", objfile);
	}
	dir = NOFAIL(malloc(dirlen + 1));
	strncpy(dir, objfile, dirlen);
	dir[dirlen] = '\0';

	file = read_text_file(cmd);

	pos = file;

	/* Sum all files in the same dir or subdirs. */
	while ((line = get_line(&pos))) {
	char* p = line;

	if (strncmp(line, "source_", sizeof("source_")-1) == 0) {
	p = strrchr(line, ' ');
	if (!p) {
	warn("malformed line: %s\n", line);
	goto out_file;
	}
	p++;
	if (!parse_file(p, md)) {
	warn("could not open %s: %s\n",
	p, strerror(errno));
	goto out_file;
	}
	continue;
	}
	if (strncmp(line, "deps_", sizeof("deps_")-1) == 0) {
	check_files = 1;
	continue;
	}
	if (!check_files)
	continue;

	/* Continue until line does not end with '\' */
	if ( *(p + strlen(p)-1) != '\\')
	break;
	/* Terminate line at first space, to get rid of final ' \' */
	while (*p) {
	if (isspace(*p)) {
	*p = '\0';
	break;
	}
	p++;
	}

	/* Check if this file is in same dir as objfile */
	if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) {
	if (!parse_file(line, md)) {
	warn("could not open %s: %s\n",
	line, strerror(errno));
	goto out_file;
	}

	}

	}

	/* Everyone parsed OK */
	ret = 1;
	out_file:
	free(file);
	free(dir);
	free(cmd);
	return ret;
	}

	/* Calc and record src checksum. */
	void get_src_version(const char *modname, char sum[], unsigned sumlen)
	{
	char buf, pos, *firstline;
	struct md4_ctx md;
	char *fname;
	char filelist[PATH_MAX + 1];

	/* objects for a module are listed in the first line of .mod file. /
	snprintf(filelist, sizeof(filelist), "%s.mod", modname);

	buf = read_text_file(filelist);

	pos = buf;
	firstline = get_line(&pos);
	if (!firstline) {
	warn("bad ending versions file for %s\n", modname);
	goto free;
	}

	md4_init(&md);
	while ((fname = strsep(&firstline, " "))) {
	if (!*fname)
	continue;
	if (!(is_static_library(fname)) &&
	!parse_source_files(fname, &md))
	goto free;
	}

	md4_final_ascii(&md, sum, sumlen);
	free:
	free(buf);
	}