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mojopatch.c
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/*
*----------------------------------------------------------------------------
*
* mojopatch
* Copyright (C) 2003 Ryan C. Gordon.
*
*----------------------------------------------------------------------------
*
* (Insert documentation here.)
*
*----------------------------------------------------------------------------
*
* This software was written quickly, is not well-engineered, and may have
* catastrophic bugs. Its method is brute-force, at best. Use at your
* own risk. Don't eat yellow snow.
*
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* Please see the file LICENSE in the root of the source tree.
*
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* Send patches, improvements, suggestions, etc to Ryan:
* icculus@clutteredmind.org.
*
*----------------------------------------------------------------------------
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#include <errno.h>
#include <time.h>
#include <ctype.h>
#include "platform.h"
#include "ui.h"
#include "md5.h"
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#define VER_EXT_ZLIB
#if USE_ZLIB
#include "zlib.h"
#undef VER_EXT_ZLIB
#define VER_EXT_ZLIB " (w/zlib)"
#endif
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/*
* The version string is really file format version, not program version.
* This is to prevent incompatible builds of the program from (mis)processing
* a patchfile.
*/
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#define VERSION "0.0.6" VER_EXT_ZLIB
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#define DEFAULT_PATCHFILENAME "default.mojopatch"
#define MOJOPATCHSIG "mojopatch " VERSION " (icculus@clutteredmind.org)\r\n"
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#define STATIC_STRING_SIZE 1024
static void make_static_string(char *statstr, const char *str)
{
size_t len = strlen(str);
if (len >= STATIC_STRING_SIZE)
_fatal("Unexpected data in make_static_string()");
else
strcpy(statstr, str);
} /* make_static_string */
typedef struct
{
char signature[sizeof (MOJOPATCHSIG)];
char product[STATIC_STRING_SIZE];
char identifier[STATIC_STRING_SIZE];
char version[STATIC_STRING_SIZE];
char newversion[STATIC_STRING_SIZE];
char readmefname[STATIC_STRING_SIZE];
char *readmedata;
char renamedir[STATIC_STRING_SIZE];
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char titlebar[STATIC_STRING_SIZE];
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char startupmsg[STATIC_STRING_SIZE];
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} PatchHeader;
typedef enum
{
OPERATION_DELETE = 0,
OPERATION_DELETEDIRECTORY,
OPERATION_ADD,
OPERATION_ADDDIRECTORY,
OPERATION_PATCH,
OPERATION_REPLACE,
OPERATION_DONE,
OPERATION_TOTAL /* must be last! */
} OperationType;
typedef struct
{
OperationType operation;
char fname[STATIC_STRING_SIZE];
} DeleteOperation;
typedef struct
{
OperationType operation;
char fname[STATIC_STRING_SIZE];
} DeleteDirOperation;
typedef struct
{
OperationType operation;
char fname[STATIC_STRING_SIZE];
size_t fsize;
md5_byte_t md5[16];
mode_t mode;
} AddOperation;
typedef struct
{
OperationType operation;
char fname[STATIC_STRING_SIZE];
mode_t mode;
} AddDirOperation;
typedef struct
{
OperationType operation;
char fname[STATIC_STRING_SIZE];
md5_byte_t md5_1[16];
md5_byte_t md5_2[16];
size_t fsize;
size_t deltasize;
mode_t mode;
} PatchOperation;
typedef struct
{
OperationType operation;
} DoneOperation;
typedef union
{
OperationType operation;
DeleteOperation del;
DeleteDirOperation deldir;
AddOperation add;
AddDirOperation adddir;
PatchOperation patch;
AddOperation replace;
DoneOperation done;
} Operations;
typedef struct
{
FILE *io;
int reading;
} SerialArchive;
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typedef enum
{
COMMAND_NONE = 0,
COMMAND_CREATE,
COMMAND_INFO,
COMMAND_DOPATCHING,
COMMAND_TOTAL
} PatchCommands;
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typedef enum
{
ZLIB_NONE,
ZLIB_COMPRESS,
ZLIB_UNCOMPRESS
} ZlibOptions;
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typedef enum
{
ISPATCHABLE_ERROR,
ISPATCHABLE_YES,
ISPATCHABLE_NO,
ISPATCHABLE_MATCHES,
} IsPatchable;
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static int debug = 0;
static int interactive = 0;
static int replace = 0;
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static int appending = 0;
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static int alwaysadd = 0;
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static int quietonsuccess = 0;
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static int skip_patch = 0; /* global flag to skip current patch. */
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static int zliblevel = 9;
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static PatchCommands command = COMMAND_NONE;
static const char *patchfile = NULL;
static const char *dir1 = NULL;
static const char *dir2 = NULL;
static char *patchtmpfile = NULL;
static char *patchtmpfile2 = NULL;
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static PatchHeader header;
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static char **ignorelist = NULL;
static int ignorecount = 0;
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char *patchfiledir = NULL;
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static unsigned int maxxdeltamem = 128; /* in megabytes. */
static unsigned char iobuf[512 * 1024];
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#if USE_ZLIB
static unsigned char compbuf[520 * 1024];
#endif
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static int flush_archive(SerialArchive *ar)
{
if ((ar->reading) || (ar->io == NULL))
return(PATCHSUCCESS);
return((fflush(ar->io) == 0) ? PATCHSUCCESS : PATCHERROR);
} /* flush_archive */
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static int serialize(SerialArchive *ar, void *val, size_t size)
{
int rc;
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if (size == 0)
return(1);
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if (ar->reading)
rc = fread(val, size, 1, ar->io);
else
rc = fwrite(val, size, 1, ar->io);
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if ( (rc != 1) && (ferror(ar->io)) )
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_fatal("%s error: %s.", ar->reading ? "Read":"Write", strerror(errno));
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return(rc == 1); /* may fail without calling _fatal() on EOF! */
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} /* serialize */
#define SERIALIZE(ar, x) serialize(ar, &x, sizeof (x))
static int serialize_static_string(SerialArchive *ar, char *val)
{
size_t len;
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if (!ar->reading)
len = strlen(val);
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if (!SERIALIZE(ar, len))
return(0);
if (len >= STATIC_STRING_SIZE)
{
_fatal("Bogus string data in patchfile.");
return(0);
} /* if */
val[len] = 0;
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return(serialize(ar, val, len));
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} /* serialize_static_string */
/*
* This will only overwrite (val)'s contents if (val) is empty ("!val[0]").
* Mostly, this lets us optionally override patchfiles from the command line.
* Writing is done, regardless of string's state.
*/
static int serialize_static_string_if_empty(SerialArchive *ar, char *val)
{
if ((!ar->reading) || (val[0] == '\0'))
return(serialize_static_string(ar, val));
else
{
char buffer[STATIC_STRING_SIZE];
return(serialize_static_string(ar, buffer)); /* throw away data */
} /* else */
} /* serialize_static_string_if_empty */
static int serialize_asciz_string(SerialArchive *ar, char **_buffer)
{
char *buffer = *_buffer;
size_t i = 0;
size_t allocated = 0;
int ch;
if (!ar->reading)
return(serialize(ar, buffer, strlen(buffer) + 1));
buffer = NULL;
/* read an arbitrary amount, allocate storage... */
do
{
if (i <= allocated)
{
allocated += 128;
buffer = realloc(buffer, allocated);
if (buffer == NULL)
{
_fatal("Out of memory.");
return(0);
} /* if */
} /* if */
ch = fgetc(ar->io);
if (ch == EOF)
{
if (feof(ar->io))
_fatal("Unexpected EOF during read.");
else
_fatal("Error during read: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
buffer[i] = (char) ch;
} while (buffer[i++] != '\0');
*_buffer = buffer;
return(1);
} /* serialize_asciz_string */
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static int serialize_header(SerialArchive *ar, PatchHeader *h, int *legitEOF)
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{
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int rc;
int dummy = 0;
if (legitEOF == NULL)
legitEOF = &dummy;
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assert(sizeof (h->signature) == sizeof (MOJOPATCHSIG));
memcpy(h->signature, MOJOPATCHSIG, sizeof (h->signature));
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rc = SERIALIZE(ar, h->signature);
*legitEOF = ( (feof(ar->io)) && (!ferror(ar->io)) );
if (!rc)
return(*legitEOF);
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if (memcmp(h->signature, MOJOPATCHSIG, sizeof (h->signature)) != 0)
{
h->signature[sizeof (h->signature) - 1] = '\0'; /* just in case. */
_fatal("[%s] is not a compatible mojopatch file.", patchfile);
_log("signature is: %s.", h->signature);
_log(" expected: %s.", MOJOPATCHSIG);
return(PATCHERROR);
} /* if */
if (serialize_static_string_if_empty(ar, h->product))
if (serialize_static_string_if_empty(ar, h->identifier))
if (serialize_static_string_if_empty(ar, h->version))
if (serialize_static_string_if_empty(ar, h->newversion))
if (serialize_static_string_if_empty(ar, h->readmefname))
if (serialize_asciz_string(ar, &h->readmedata))
if (serialize_static_string_if_empty(ar, h->renamedir))
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if (serialize_static_string_if_empty(ar, h->titlebar))
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if (serialize_static_string_if_empty(ar, h->startupmsg))
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return(flush_archive(ar));
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return(0);
} /* serialize_header */
static int serialize_delete_op(SerialArchive *ar, void *d)
{
DeleteOperation *del = (DeleteOperation *) d;
assert(del->operation == OPERATION_DELETE);
if (serialize_static_string(ar, del->fname))
return(1);
return(0);
} /* serialize_delete_op */
static int serialize_deldir_op(SerialArchive *ar, void *d)
{
DeleteDirOperation *deldir = (DeleteDirOperation *) d;
assert(deldir->operation == OPERATION_DELETEDIRECTORY);
if (serialize_static_string(ar, deldir->fname))
return(1);
return(0);
} /* serialize_deldir_op */
static int serialize_add_op(SerialArchive *ar, void *d)
{
AddOperation *add = (AddOperation *) d;
assert((add->operation == OPERATION_ADD) ||
(add->operation == OPERATION_REPLACE));
if (serialize_static_string(ar, add->fname))
if (SERIALIZE(ar, add->fsize))
if (SERIALIZE(ar, add->md5))
if (SERIALIZE(ar, add->mode))
return(1);
return(0);
} /* serialize_add_op */
static int serialize_adddir_op(SerialArchive *ar, void *d)
{
AddDirOperation *adddir = (AddDirOperation *) d;
assert(adddir->operation == OPERATION_ADDDIRECTORY);
if (serialize_static_string(ar, adddir->fname))
if (SERIALIZE(ar, adddir->mode))
return(1);
return(0);
} /* serialize_adddir_op */
static int serialize_patch_op(SerialArchive *ar, void *d)
{
PatchOperation *patch = (PatchOperation *) d;
assert(patch->operation == OPERATION_PATCH);
if (serialize_static_string(ar, patch->fname))
if (SERIALIZE(ar, patch->md5_1))
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if (SERIALIZE(ar, patch->md5_2))
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if (SERIALIZE(ar, patch->fsize))
if (SERIALIZE(ar, patch->deltasize))
if (SERIALIZE(ar, patch->mode))
return(1);
return(0);
} /* serialize_patch_op */
static int serialize_replace_op(SerialArchive *ar, void *d)
{
AddOperation *add = (AddOperation *) d;
assert(add->operation == OPERATION_REPLACE);
return(serialize_add_op(ar, d));
} /* serialize_replace_op */
static int serialize_done_op(SerialArchive *ar, void *d)
{
DoneOperation *done = (DoneOperation *) d;
assert(done->operation == OPERATION_DONE);
return(1);
} /* serialize_done_op */
typedef int (*OpSerializers)(SerialArchive *ar, void *data);
static OpSerializers serializers[OPERATION_TOTAL] =
{
/* Must match OperationType order! */
serialize_delete_op,
serialize_deldir_op,
serialize_add_op,
serialize_adddir_op,
serialize_patch_op,
serialize_replace_op,
serialize_done_op,
};
static int handle_delete_op(SerialArchive *ar, OperationType op, void *data);
static int handle_deldir_op(SerialArchive *ar, OperationType op, void *data);
static int handle_add_op(SerialArchive *ar, OperationType op, void *data);
static int handle_adddir_op(SerialArchive *ar, OperationType op, void *data);
static int handle_patch_op(SerialArchive *ar, OperationType op, void *data);
static int handle_replace_op(SerialArchive *ar, OperationType op, void *data);
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static int handle_done_op(SerialArchive *ar, OperationType op, void *data);
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typedef int (*OpHandlers)(SerialArchive *ar, OperationType op, void *data);
static OpHandlers operation_handlers[OPERATION_TOTAL] =
{
/* Must match OperationType order! */
handle_delete_op,
handle_deldir_op,
handle_add_op,
handle_adddir_op,
handle_patch_op,
handle_replace_op,
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handle_done_op,
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};
static int serialize_operation(SerialArchive *ar, Operations *ops)
{
if (!SERIALIZE(ar, ops->operation))
return(0);
if ((ops->operation < 0) || (ops->operation >= OPERATION_TOTAL))
{
_fatal("Invalid operation in patch file.");
return(0);
} /* if */
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if (!serializers[ops->operation](ar, ops))
return(0);
return(flush_archive(ar));
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} /* serialize_operation */
static int open_serialized_archive(SerialArchive *ar,
const char *fname,
int is_reading,
int *sizeok,
size_t *file_size)
{
memset(ar, '\0', sizeof (*ar));
if (strcmp(fname, "-") == 0) /* read from stdin? */
ar->io = (is_reading) ? stdin : stdout;
else
{
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const char *fopenstr = "rb";
if (!is_reading)
fopenstr = ((appending) ? "ab" : "wb");
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if (file_size != NULL)
{
int tmp = get_file_size(patchfile, file_size);
if (sizeok != NULL)
*sizeok = tmp;
} /* if */
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ar->io = fopen(patchfile, fopenstr);
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if (ar->io == NULL)
{
_fatal("Couldn't open [%s]: %s.", patchfile, strerror(errno));
return(PATCHERROR);
} /* if */
} /* else */
ar->reading = is_reading;
return(PATCHSUCCESS);
} /* open_serialized_archive */
static inline int close_serialized_archive(SerialArchive *ar)
{
if (ar->io != NULL)
{
if (fclose(ar->io) == EOF)
return(PATCHERROR);
ar->io = NULL;
} /* if */
return(PATCHSUCCESS);
} /* close_serialized_archive */
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/* printf-style: makes string for UI to put in the log. */
void _fatal(const char *fmt, ...)
{
char buf[512];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof (buf), fmt, ap);
va_end(ap);
buf[sizeof(buf)-1] = '\0';
ui_fatal(buf);
ui_pump();
} /* _fatal */
/* printf-style: makes string for UI to put in the log. */
void _log(const char *fmt, ...)
{
char buf[512];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof (buf), fmt, ap);
va_end(ap);
buf[sizeof(buf)-1] = '\0';
ui_add_to_log(buf, 0);
ui_pump();
} /* _log */
/* printf-style: makes string for UI to put in the log if debugging enabled. */
void _dlog(const char *fmt, ...)
{
if (debug)
{
char buf[512];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof (buf), fmt, ap);
va_end(ap);
buf[sizeof(buf)-1] = '\0';
ui_add_to_log(buf, 1);
ui_pump();
} /* if */
} /* _dlog */
static void _current_operation(const char *fmt, ...)
{
char buf[512];
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if (skip_patch)
strcpy(buf, "Skipping ahead...");
else
{
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof (buf), fmt, ap);
va_end(ap);
buf[sizeof(buf)-1] = '\0';
} /* else */
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ui_status(buf);
ui_pump();
} /* _current_operation */
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/* !!! FIXME: don't taunt this function. */
/*
* ver == installed app's current version.
* allowed_ver == allowed versions ("123", "123 or 456", "less than 789").
* newver == version that patched app will become.
*/
IsPatchable version_ok(const char *ver, const char *allowed_ver, const char *newver)
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{
char *ptr;
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char *buf;
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if (*allowed_ver == '\0') /* No specified version? Anything is okay. */
return ISPATCHABLE_YES;
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if (strcmp(ver, newver) == 0) /* all patched up? */
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return ISPATCHABLE_MATCHES;
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buf = (char *) alloca(strlen(allowed_ver) + 1);
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strcpy(buf, allowed_ver);
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const char *lessThan = "less than ";
const size_t lessThanLen = strlen(lessThan);
if (strncmp(buf, lessThan, lessThanLen) == 0)
{
char *endptr = NULL;
double dver;
double dallow;
ptr = buf + lessThanLen;
dver = strtod(ver, &endptr);
if (endptr == ver)
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return ISPATCHABLE_ERROR;
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dallow = strtod(ptr, &endptr);
if (endptr == ptr)
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return ISPATCHABLE_ERROR;
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if (dver < dallow)
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return(ISPATCHABLE_YES);
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return(ISPATCHABLE_NO);
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} /* if */
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while ((ptr = strstr(buf, " or ")) != NULL)
{
*ptr = '\0';
if (strcmp(ver, buf) == 0)
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return(ISPATCHABLE_YES);
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buf = ptr + 4;
} /* while */
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return( (strcmp(ver, buf) == 0) ? ISPATCHABLE_YES : ISPATCHABLE_NO );
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} /* version_ok */
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static IsPatchable check_product_version(const char *ident,
const char *version,
const char *newversion)
{
char buf[128];
IsPatchable retval = ISPATCHABLE_ERROR;
if (!get_product_version(ident, buf, sizeof (buf)))
_fatal("Can't determine product's installed version.");
else
{
retval = version_ok(buf, version, newversion);
if (retval == ISPATCHABLE_MATCHES)
_fatal("You seem to be all patched up already!");
else if (retval == ISPATCHABLE_ERROR)
_fatal("This patch is misbuilt! Contact your vendor!");
else if (retval == ISPATCHABLE_NO)
{
_fatal("This patch applies to version '%s', but you have '%s'.",
version, buf);
} /* else */
else
{
assert(retval == ISPATCHABLE_YES);
} /* else */
} /* else */
return(retval);
} /* check_product_version */
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static int _do_xdelta(const char *fmt, ...)
{
char buf[512];
va_list ap;
va_start(ap, fmt);
vsnprintf(buf, sizeof (buf), fmt, ap);
va_end(ap);
buf[sizeof(buf)-1] = '\0';
_dlog("(xdelta call: [%s].)", buf);
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return(spawn_xdelta(buf) == SPAWN_RETURNGOOD);
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} /* _do_xdelta */
static int in_ignore_list(const char *fname)
{
int i;
for (i = 0; i < ignorecount; i++)
{
if (strcmp(fname, ignorelist[i]) == 0)
{
_log("Ignoring %s on user's instructions.", fname);
return(1);
} /* if */
} /* for */
return(0);
} /* in_ignore_list */
static inline int info_only(void)
{
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return((command == COMMAND_INFO) || (skip_patch));
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} /* info_only */
static void free_filelist(file_list *list)
{
file_list *next;
while (list != NULL)
{
next = list->next;
free(list->fname);
free(list);
list = next;
} /* while */
} /* free_filelist */
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#if USE_ZLIB
static int write_between_files_compress(FILE *in, FILE *out, long fsize)
743
{
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uLongf compsize;
uLongf uncompsize;
while (fsize > 0)
{
uncompsize = sizeof (iobuf);
if (uncompsize > fsize)
uncompsize = fsize;
if (fread(iobuf, uncompsize, 1, in) != 1)
{
_fatal("read error: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
ui_pump();
fsize -= uncompsize;
compsize = sizeof (compbuf);
if (compress2(compbuf, &compsize, iobuf, uncompsize, zliblevel)!=Z_OK)
{
_fatal("zlib compression error.");
return(PATCHERROR);
} /* if */
ui_pump();
if ( (fwrite(&uncompsize, sizeof (uncompsize), 1, out) != 1) ||
(fwrite(&compsize, sizeof (compsize), 1, out) != 1) ||
(fwrite(compbuf, compsize, 1, out) != 1) )
{
_fatal("write error: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
ui_pump();
} /* while */
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return(fflush(out) == 0 ? PATCHSUCCESS : PATCHERROR);
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} /* write_between_files_compress */
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static int write_between_files_uncompress(FILE *in, FILE *out,
long fsize, int skip)
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{
uLongf compsize;
uLongf uncompsize;
while (fsize > 0)
{
if ( (fread(&uncompsize, sizeof (uncompsize), 1, in) != 1) ||
(fread(&compsize, sizeof (compsize), 1, in) != 1) )
{
_fatal("read error: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
if ( (compsize > sizeof (compbuf)) || (uncompsize > sizeof (iobuf)) )
{
_fatal("bogus compression data.");
return(PATCHERROR);
} /* if */
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/* fsize is the uncompressed file size... */
fsize -= uncompsize;
if (skip)
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{
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if (fseek(in, compsize, SEEK_CUR) < 0)
{
_fatal("seek error: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
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} /* if */
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else
818
{
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if (fread(compbuf, compsize, 1, in) != 1)
{
_fatal("read error: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
ui_pump();
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if (uncompress(iobuf, &uncompsize, compbuf, compsize) != Z_OK)
{
_fatal("zlib decompression error.");
return(PATCHERROR);
} /* if */
ui_pump();
if (fwrite(iobuf, uncompsize, 1, out) != 1)
{
_fatal("write error: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
} /* else */
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ui_pump();
} /* while */
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return(fflush(out) == 0 ? PATCHSUCCESS : PATCHERROR);
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} /* write_between_files_uncompress */
#endif
static int write_between_files(FILE *in, FILE *out, long fsize, ZlibOptions z)
{
#if USE_ZLIB
if (z == ZLIB_COMPRESS)
return(write_between_files_compress(in, out, fsize));
else if (z == ZLIB_UNCOMPRESS)
854
return(write_between_files_uncompress(in, out, fsize, 0));
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else
assert(z == ZLIB_NONE);
#endif
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while (fsize > 0)
{
int max = sizeof (iobuf);
if (max > fsize)
max = fsize;
865
if (fread(iobuf, max, 1, in) != 1)
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{
_fatal("read error: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
ui_pump();
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fsize -= max;
if (fwrite(iobuf, max, 1, out) != 1)
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{
_fatal("write error: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
ui_pump();
} /* while */
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return(fflush(out) == 0 ? PATCHSUCCESS : PATCHERROR);
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} /* write_between_files */
static int do_rename(const char *from, const char *to)
{
FILE *in;
FILE *out;
long fsize;
int rc;
unlink(to); /* just in case. */
if (rename(from, to) != -1)
return(PATCHSUCCESS);
/* rename() might fail if from and to are on seperate filesystems. */
rc = get_file_size(from, &fsize);
in = fopen(from, "rb");
out = fopen(to, "wb");
if ((!rc) || (!in) || (!out))
{
if (in)
fclose(in);
if (out)
fclose(out);
unlink(to);
_fatal("File copy failed.");
return(PATCHERROR);
} /* if */
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rc = write_between_files(in, out, fsize, ZLIB_NONE);
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fclose(in);
if ((fclose(out) == -1) && (rc != PATCHERROR))
{
_fatal("File copy failed.");
return(PATCHERROR);
} /* if */
unlink(from);
return(rc);
} /* do_rename */
static int md5sum(FILE *in, md5_byte_t *digest, int output)
{
md5_state_t md5state;
long br;
_dlog("md5summing...");
memset(digest, '\0', 16);
md5_init(&md5state);
if (fseek(in, 0, SEEK_SET) == -1)
{
_fatal("Couldn't seek in file: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
while (1)
{
ui_pump();
br = fread(iobuf, 1, sizeof (iobuf), in);
if (br == 0)
{
int err = errno;
if (feof(in))
break;
else
{
_fatal("Read error: %s.", strerror(err));
return(PATCHERROR);
} /* else */
} /* if */
md5_append(&md5state, (const md5_byte_t *) iobuf, br);
} /* while */
md5_finish(&md5state, digest);
if ((output) || (debug))
{
/* ugly, but want to print it all on one line... */
_log(" (md5sum: %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x)",
digest[0], digest[1], digest[2], digest[3],
digest[4], digest[5], digest[6], digest[7],
digest[8], digest[9], digest[10], digest[11],
digest[12], digest[13], digest[14], digest[15]);
} /* if */
if (fseek(in, 0, SEEK_SET) == -1)
{
_fatal("Couldn't seek in file: %s.", strerror(errno));
return(PATCHERROR);
} /* if */
return(PATCHSUCCESS);
} /* md5sum */
static int verify_md5sum(md5_byte_t *md5, md5_byte_t *result, FILE *in, int isfatal)
{
md5_byte_t thismd5[16];
if (md5sum(in, thismd5, 0) == PATCHERROR)
return(PATCHERROR);
if (result != NULL)
memcpy(result, thismd5, sizeof (thismd5));
if (memcmp(thismd5, md5, sizeof (thismd5)) != 0)
{
if (isfatal)
_fatal("md5sum doesn't match original!");
return(PATCHERROR);
} /* if */