nulib2/nulib2/ArcUtils.c

/*
 * Nulib2
 * Copyright (C) 2000 by Andy McFadden, All Rights Reserved.
 * This is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License, see the file COPYING.
 *
 * Common archive-related utility functions.
 */
#include "Nulib2.h"


/*
 * ===========================================================================
 *		Output pathnames
 * ===========================================================================
 */

/*
 * General-purpose output pathname filter, invoked by nufxlib via a
 * callback.  Normalizes the pathname to match the current OS requirements.
 *
 * If we're extracting to stdout, this fills in the "newFp" field instead.
 *
 * The buffer we return to the archive library will be overwritten the
 * next time this function gets called.  This is expected.
 */
static NuResult
OutputPathnameFilter(NuArchive* pArchive, void* vproposal)
{
	NuPathnameProposal* pathProposal = vproposal;
	NulibState* pState;
	const char* newPathname;
	NuRecordIdx renameFromIdx;
	char* renameToStr;
	char* resultBuf;

	assert(pArchive != nil);
	(void) NuGetExtraData(pArchive, (void**) &pState);
	assert(pState != nil);

	/* handle extract-to-pipe */
	if (NState_GetCommand(pState) == kCommandExtractToPipe) {
		pathProposal->newDataSink = NState_GetPipeSink(pState);
		NState_SetSuppressOutput(pState, true);
		return kNuOK;
	}

	/*
	 * If they're trying to rename this file, do so now.  We don't run
	 * the output through the normalizer; if the user typed it, assume
	 * that it's okay (and let the OS tell them if it isn't).
	 */
	renameToStr = NState_GetRenameToStr(pState);
	if (renameToStr != nil) {
		renameFromIdx = NState_GetRenameFromIdx(pState);

		if (renameFromIdx == pathProposal->pRecord->recordIdx) {
			/* right source file, proceed with the rename */
			NState_SetTempPathnameLen(pState, strlen(renameToStr) +1);
			resultBuf = NState_GetTempPathnameBuf(pState);
			assert(resultBuf != nil);
			strcpy(resultBuf, renameToStr);

			pathProposal->newPathname = resultBuf;
		}

		/* free up renameToStr */
		NState_SetRenameToStr(pState, nil);

		goto bail;
	}

	/*
	 * Convert the pathname into something suitable for the current OS.
	 */
	newPathname = NormalizePath(pState, pathProposal);
	if (newPathname == nil) {
		ReportError(kNuErrNone, "unable to convert pathname");
		return kNuAbort;
	}

	pathProposal->newPathname = newPathname;

bail:
	return kNuOK;
}


/*
 * ===========================================================================
 *		User input
 * ===========================================================================
 */

/*
 * Get a single character from the input.
 *
 * For portability, I'm just getting a line of input and keeping the
 * first character.  A fancier version would play with line disciplines
 * so you wouldn't have to hit "return".
 */
static char
GetReplyChar(char defaultReply)
{
	char tmpBuf[32];

	if (fgets(tmpBuf, sizeof(tmpBuf), stdin) == nil)
		return defaultReply;
	if (tmpBuf[0] == '\n' || tmpBuf[0] == '\r')
		return defaultReply;

	return tmpBuf[0];
}


#define kMaxInputLen	128

/*
 * Get a string back from the user.
 *
 * String returned should be freed by the caller.
 */
static char*
GetReplyString(const char* prompt)
{
	char buf[kMaxInputLen];
	char* result;
	int len;

	printf("%s", prompt);
	fflush(stdout);
	result = fgets(buf, sizeof(buf), stdin);
	if (result == nil || feof(stdin) || ferror(stdin) || buf[0] == '\0' ||
		buf[0] == '\n')
	{
		return nil;
	}

	/* nuke the terminating '\n', which is lots of fun in filenames */
	len = strlen(buf);
	if (buf[len-1] == '\n')
		buf[len-1] = '\0';

	return strdup(buf);
}


/*
 * Get a one-line comment from the user, of at most "maxLen" bytes.
 *
 * If the user enters a blank line, return "nil".
 *
 * A pointer to a newly-allocated buffer is returned.
 */
char*
GetSimpleComment(NulibState* pState, const char* pathname, int maxLen)
{
	char* buf = nil;
	char* result;
	int len;

	buf = Malloc(maxLen);
	if (buf == nil)
		return nil;

	printf("Enter one-line comment for '%s'\n: ", pathname);
	fflush(stdout);

	result = fgets(buf, maxLen, stdin);
	if (result == nil || feof(stdin) || ferror(stdin) || buf[0] == '\0' ||
		buf[0] == '\n')
	{
		Free(buf);
		return nil;
	}

	/* nuke the terminating '\n', which we don't need */
	len = strlen(buf);
	if (buf[len-1] == '\n')
		buf[len-1] = '\0';

	return buf;
}


/*
 * ===========================================================================
 *		Callbacks (progress updates, error handling, record selection)
 * ===========================================================================
 */

#define kMaxDisplayLen	60

/*
 * Returns "true" if the filespec in "spec" matches what's in "pRecord".
 *
 * (Someday "spec" might be a regexp.)
 */
static Boolean
SpecMatchesRecord(NulibState* pState, const char* spec, const NuRecord* pRecord)
{
	if (NState_GetModRecurse(pState))
		return (strncmp(spec, pRecord->filename, strlen(spec)) == 0);
	else
		return (strcmp(spec, pRecord->filename) == 0);
}

/*
 * Determine whether the current record we're examining is described by
 * the file specification given on the command line.
 *
 * If no filespec was provided, then all records are "specified".
 */
Boolean
IsSpecified(NulibState* pState, const NuRecord* pRecord)
{
	char* const* pSpec;
	int i;

	if (!NState_GetFilespecCount(pState))
		return true;

	pSpec = NState_GetFilespecPointer(pState);
	for (i = NState_GetFilespecCount(pState); i > 0; i--, pSpec++) {
		if (SpecMatchesRecord(pState, *pSpec, pRecord))
			return true;
	}

	return false;
}


/*
 * General-purpose selection filter, invoked as a callback.  Compares the
 * selection proposal with the filenames in "filespec".
 */
NuResult
SelectionFilter(NuArchive* pArchive, void* vproposal)
{
	const NuSelectionProposal* selProposal = vproposal;
	NulibState* pState;

	assert(pArchive != nil);
	(void) NuGetExtraData(pArchive, (void**) &pState);
	assert(pState != nil);

	if (IsSpecified(pState, selProposal->pRecord)) {
		NState_IncMatchCount(pState);

		/* we don't get progress notifications for delete, so do it here */
		if (NState_GetCommand(pState) == kCommandDelete)
			printf("Deleting %s\n", selProposal->pRecord->filename);

		return kNuOK;
	} else
		return kNuSkip;
}


/*
 * Print a three-digit progress percentage; range is 0% to 100%.
 */
void
PrintPercentage(ulong total, ulong progress)
{
	ulong perc;

	if (!total) {
		/*printf("   %%");*/
		printf("    ");
		return;
	}

	if (total < 21474836) {
		perc = (progress * 100 + 50) / total;
		if (perc > 100)
			perc = 100;
	} else {
		perc = progress / (total / 100);
		if (perc > 100)
			perc = 100;
	}

	printf("%3ld%%", perc);
}

/*
 * Show our progress, unless we're expanding to a pipe.  Invoked as a
 * callback by nufxlib.
 */
NuResult
ProgressUpdater(NuArchive* pArchive, void* vProgress)
{
	const NuProgressData* pProgress = vProgress;
	NulibState* pState;
	const char* percStr;
	const char* actionStr;
	char nameBuf[kMaxDisplayLen+1];
	Boolean showName, eolConv;

	assert(pArchive != nil);
	(void) NuGetExtraData(pArchive, (void**) &pState);
	assert(pState != nil);

	if (NState_GetSuppressOutput(pState))
		return kNuOK;

	percStr = nil;
	showName = false;
	eolConv = false;

	switch (pProgress->operation) {
	case kNuOpAdd:
		switch (pProgress->state) {
		case kNuProgressPreparing:
		case kNuProgressOpening:
			actionStr = "adding     ";
			showName = true;
			break;
		case kNuProgressCompressing:
			actionStr = "compressing";
			break;
		case kNuProgressStoring:
			actionStr = "storing    ";
			break;
		default:
			actionStr = "??????     ";
			break;
		}
		break;
	case kNuOpExtract:
		switch (pProgress->state) {
		case kNuProgressPreparing:
		case kNuProgressOpening:
			actionStr = "extracting";
			showName = true;
			break;
		case kNuProgressExpanding:
			actionStr = "expanding ";
			break;
		case kNuProgressCopying:
			actionStr = "extracting";
			break;
		default:
			actionStr = "??????    ";
			break;
		}
		if (pProgress->expand.convertEOL == kNuConvertOn)
			eolConv = true;
		break;
	case kNuOpTest:
		switch (pProgress->state) {
		case kNuProgressPreparing:
		case kNuProgressOpening:
			showName = true;
			/* no break */
		case kNuProgressExpanding:
		case kNuProgressCopying:
			actionStr = "verifying";
			break;
		default:
			actionStr = "??????   ";
			break;
		}
		break;
	default:
		assert(0);
		actionStr = "????";
	}

	switch (pProgress->state) {
	case kNuProgressDone:
		actionStr = nil;
		percStr = "DONE\n";
		break;
	case kNuProgressSkipped:
		actionStr = nil;
		percStr = "SKIP\n";
		break;
	case kNuProgressFailed:
		actionStr = nil;
		percStr = "FAIL\n";
		break;
	default:
		break;
	}

	if (showName) {
		/*
		 * Use "pathname" (whole thing) rather than "filename" (file part).
		 * Could also use "origPathname", but I like to show what they're
		 * getting instead of what they're giving.
		 */
		int len = strlen(pProgress->pathname);
		if (len < sizeof(nameBuf)) {
			strcpy(nameBuf, pProgress->pathname);
		} else {
			nameBuf[0] = nameBuf[1] = '.';
			strncpy(nameBuf+2, pProgress->pathname + len - (sizeof(nameBuf)-3),
				sizeof(nameBuf)-3);
			nameBuf[sizeof(nameBuf)-1] = '\0';
		}
	}

	if (actionStr == nil && percStr != nil) {
		printf("\r%s", percStr);
	} else if (actionStr != nil && percStr == nil) {
		if (percStr == nil) {
			putc('\r', stdout);
			PrintPercentage(pProgress->uncompressedLength,
				pProgress->uncompressedProgress);
			if (showName)
				printf(" %s%s %s", actionStr, eolConv ? "+" : " ", nameBuf);
			else
				printf(" %s%s", actionStr, eolConv ? "+" : " ");
		}
	} else {
		assert(0);
		printf("????\n");
	}

	fflush(stdout);
	/*printf(" %ld \n", pProgress->uncompressedProgress);*/
	/*usleep(250000);*/

	return kNuOK;
}


/*
 * Decide whether or not to replace an existing file (during extract)
 * or record (during add).
 */
static NuResult
HandleReplaceExisting(NulibState* pState, NuArchive* pArchive,
	const NuErrorStatus* pErrorStatus)
{
	NuResult result = kNuOK;
	char* renameName;
	char reply;

	assert(pState != nil);
	assert(pErrorStatus != nil);
	assert(pErrorStatus->pathname != nil);

	assert(pErrorStatus->canOverwrite);
	assert(pErrorStatus->canSkip);
	assert(pErrorStatus->canAbort);

	if (NState_GetInputUnavailable(pState)) {
		putc('\n', stdout);
		ReportError(pErrorStatus->err, "Giving up");
		result = kNuAbort;
		goto bail;
	}

	while (1) {
		printf("\n  Replace %s?  [y]es, [n]o, [A]ll, [N]one",
			pErrorStatus->pathname);
		if (pErrorStatus->canRename)	/* renaming records not allowed */
			printf(", [r]ename: ");
		else
			printf(": ");
		fflush(stdout);

		reply = GetReplyChar('n');

		switch (reply) {
		case 'y':
			result = kNuOverwrite;
			goto bail;
		case 'n':
			result = kNuSkip;
			goto bail;
		case 'A':
			(void) NuSetValue(pArchive, kNuValueHandleExisting,
					kNuAlwaysOverwrite);
			result = kNuOverwrite;
			goto bail;
		case 'N':
			(void) NuSetValue(pArchive, kNuValueHandleExisting,
					kNuNeverOverwrite);
			result = kNuSkip;
			goto bail;
		case 'r':
			if (!pErrorStatus->canRename) {
				printf("Response not acceptable\n");
				break;	/* continue in "while" loop */
			}
			renameName = GetReplyString("New name: ");
			if (renameName == nil)
				break;		/* continue in "while" loop */
			if (pErrorStatus->pRecord == nil) {
				ReportError(kNuErrNone, "Unexpected nil record");
				break;		/* continue in "while" loop */
			}
			NState_SetRenameFromIdx(pState,
				pErrorStatus->pRecord->recordIdx);
			NState_SetRenameToStr(pState, renameName);
			result = kNuRename;
			goto bail;
		case 'q':		/* stealth option to quit */
		case 'Q':
			result = kNuAbort;
			goto bail;
		default:
			printf("Response not understood -- please use y/n/A/N/r\n");
			break;		/* continue in "while" loop */
		}
	}

bail:
	return result;
}

/*
 * Found a bad CRC... should we press onward?
 *
 * Note pErrorStatus->pathname may be nil if the error was found in the
 * master header or in the record header.
 */
static NuResult
HandleBadCRC(NulibState* pState, NuArchive* pArchive,
	const NuErrorStatus* pErrorStatus)
{
	NuResult result = kNuOK;
	char reply;

	assert(pState != nil);
	assert(pErrorStatus != nil);

	if (NState_GetInputUnavailable(pState)) {
		putc('\n', stderr);
		ReportError(pErrorStatus->err, "Giving up");
		result = kNuAbort;
		goto bail;
	}

	while (1) {
		if (pErrorStatus->pathname != nil)
			fprintf(stderr, "\n  Found a bad CRC in %s\n",
				pErrorStatus->pathname);
		else
			fprintf(stderr, "\n  Found a bad CRC in the archive\n");

		fprintf(stderr,
			"  Archive may be damaged, continue anyway?  [y]es, [n]o: ");
		fflush(stderr);

		reply = GetReplyChar('n');

		switch (reply) {
		case 'y':
			result = kNuIgnore;
			goto bail;
		case 'n':
		case 'N':
			result = kNuAbort;
			goto bail;
		default:
			fprintf(stderr, "Response not understood -- please use y/n\n");
			break;		/* continue in "while" loop */
		}
	}

bail:
	return result;
}

#if 0
/*
 * Tried to add a nonexistent file; continue?
 */
static NuResult
HandleAddNotFound(NulibState* pState, NuArchive* pArchive,
	const NuErrorStatus* pErrorStatus)
{
	NuResult result = kNuOK;
	char reply;

	assert(pState != nil);
	assert(pErrorStatus != nil);
	assert(pErrorStatus->pathname != nil);

	if (NState_GetInputUnavailable(pState)) {
		putc('\n', stdout);
		ReportError(pErrorStatus->err, "Giving up");
		result = kNuAbort;
		goto bail;
	}

	while (1) {
		fprintf("\n  Couldn't find %s, continue?  [y]es, [n]o: ",
			pErrorStatus->pathname);
		fflush(stderr);

		reply = GetReplyChar('n');

		switch (reply) {
		case 'y':
			result = kNuSkip;
			goto bail;
		case 'n':
		case 'N':
			result = kNuAbort;
			goto bail;
		default:
			fprintf(stderr, "Response not understood -- please use y/n\n");
			break;		/* continue in "while" loop */
		}
	}

bail:
	return result;
}
#endif

/*
 * Something failed, and the user may want to choose how to handle it.
 * Invoked as a callback.
 */
NuResult
ErrorHandler(NuArchive* pArchive, void* vErrorStatus)
{
	const NuErrorStatus* pErrorStatus = vErrorStatus;
	NulibState* pState;
	NuResult result;

	assert(pArchive != nil);
	(void) NuGetExtraData(pArchive, (void**) &pState);
	assert(pState != nil);

	/* default action is to abort the current operation */
	result = kNuAbort;

	/*
	 * When extracting, the error handler callback gets invoked for several
	 * different problems because we might want to rename the file.  Also,
	 * because extractions are done with "bulk" calls, returning an
	 * individual error message would be meaningless.
	 *
	 * When adding files, the NuAddFile and NuAddRecord calls can return
	 * immediate, specific results for a single add.  The only reasons for
	 * calling here are to decide if an existing record should be replaced
	 * or not (without even an option to rename), or to decide what to do
	 * when the NuFlush call runs into a problem while adding a file.
	 */
	if (pErrorStatus->operation == kNuOpExtract) {
		if (pErrorStatus->err == kNuErrFileExists) {
			result = HandleReplaceExisting(pState, pArchive, pErrorStatus);
		} else if (pErrorStatus->err == kNuErrNotNewer) {
			/* if we were expecting this, it's okay */
			if (NState_GetModFreshen(pState) || NState_GetModUpdate(pState)) {
				printf("\rSKIP\n");
				result = kNuSkip;
			} else {
				DBUG(("WEIRD one\n"));
			}
		} else if (pErrorStatus->err == kNuErrDuplicateNotFound) {
			/* if we were expecting this, it's okay */
			if (NState_GetModFreshen(pState)) {
				printf("\rSKIP\n");
				result = kNuSkip;
			} else {
				DBUG(("WEIRD two\n"));
			}
		}
	} else if (pErrorStatus->operation == kNuOpAdd) {
		if (pErrorStatus->err == kNuErrRecordExists) {
			/* if they want to update or freshen, don't hassle them */
			if (NState_GetModFreshen(pState) || NState_GetModUpdate(pState))
				result = kNuOverwrite;
			else
				result = HandleReplaceExisting(pState, pArchive, pErrorStatus);
		} else if (pErrorStatus->err == kNuErrFileNotFound) {
			/*
			 * This should never happen, because NuLib2 verifies the
			 * presence of the files.  (If you want to test this out,
			 * you have to "sabotage" AddFile, or remove a file from disk
			 * while NuFlush is running.)
			 */
			assert(0);
			/*result = HandleAddNotFound(pState, pArchive, pErrorStatus);*/
		}
	} else if (pErrorStatus->operation == kNuOpTest) {
		if (pErrorStatus->err == kNuErrBadMHCRC ||
			pErrorStatus->err == kNuErrBadRHCRC ||
			pErrorStatus->err == kNuErrBadThreadCRC ||
			pErrorStatus->err == kNuErrBadDataCRC)
		{
			result = HandleBadCRC(pState, pArchive, pErrorStatus);
		}
	}

	return result;
}


#if 0
/*
 * Display an error message.
 *
 * (This was just a test to see if it worked... NufxLib's default behavior
 * is fine for NuLib2.)
 */
NuResult
ErrorMessageHandler(NuArchive* pArchive, void* vErrorMessage)
{
	const NuErrorMessage* pErrorMessage = (const NuErrorMessage*) vErrorMessage;

	fprintf(stderr, "%s%d %3d %s:%d %s %s\n",
		pArchive == nil ? "(GLOBAL)" : "",
		pErrorMessage->isDebug, pErrorMessage->err, pErrorMessage->file,
		pErrorMessage->line, pErrorMessage->function, pErrorMessage->message);
	return kNuOK;
}
#endif


/*
 * ===========================================================================
 *		Open an archive
 * ===========================================================================
 */

/* an archive name of "-" indicates we want to use stdin */
static const char* kStdinArchive = "-";


/*
 * Determine whether the access bits on the record make it a read-only
 * file or not.
 *
 * Uses a simplified view of the access flags.
 */
Boolean
IsRecordReadOnly(const NuRecord* pRecord)
{
	if (pRecord->recAccess == 0x21L || pRecord->recAccess == 0x01L)
		return true;
	else
		return false;
}


/*
 * Returns "true" if "archiveName" is the name we use to represent stdin.
 */
Boolean
IsFilenameStdin(const char* archiveName)
{
	assert(archiveName != nil);
	return (strcmp(archiveName, kStdinArchive) == 0);
}


#define BailError(err) { if (err != kNuErrNone) goto bail; }

/*
 * Open the archive in read-only mode.  We use "file mode" for a file, or
 * "streaming mode" for stdin.
 */
NuError
OpenArchiveReadOnly(NulibState* pState)
{
	NuError err;
	NuArchive* pArchive;

	assert(pState != nil);

	if (IsFilenameStdin(NState_GetArchiveFilename(pState))) {
		err = NuStreamOpenRO(stdin, &pArchive);
		if (err != kNuErrNone) {
			ReportError(err, "unable to open create stdin archive");
			goto bail;
		}
		/*
		 * Since the archive is on stdin, we can't ask the user questions.
		 * On a UNIX system we could open /dev/tty, but that's not portable,
		 * and I don't think archives on stdin are going to be popular
		 * enough to make this worth doing.
		 */
		NState_SetInputUnavailable(pState, true);
	} else {
		err = NuOpenRO(NState_GetArchiveFilename(pState), &pArchive);
		if (err != kNuErrNone) {
			ReportError(err, "unable to open '%s'",
				NState_GetArchiveFilename(pState));
			goto bail;
		}
	}

	/* introduce them */
	NState_SetNuArchive(pState, pArchive);
	err = NuSetExtraData(pArchive, pState);

	err = NuSetSelectionFilter(pArchive, SelectionFilter);
	err = NuSetOutputPathnameFilter(pArchive, OutputPathnameFilter);
	err = NuSetProgressUpdater(pArchive, ProgressUpdater);
	err = NuSetErrorHandler(pArchive, ErrorHandler);
	/*err = NuSetErrorMessageHandler(pArchive, ErrorMessageHandler);*/

	/* set the EOL conversion */
	if (NState_GetModConvertAll(pState))
		err = NuSetValue(pArchive, kNuValueConvertExtractedEOL, kNuConvertOn);
	else if (NState_GetModConvertText(pState))
		err = NuSetValue(pArchive, kNuValueConvertExtractedEOL, kNuConvertAuto);
	else
		err = NuSetValue(pArchive, kNuValueConvertExtractedEOL, kNuConvertOff);
	BailError(err);

	/* handle "-s" flag */
	if (NState_GetModOverwriteExisting(pState)) {
		err = NuSetValue(pArchive, kNuValueHandleExisting, kNuAlwaysOverwrite);
		BailError(err);
	}

	/* handle "-f" and "-u" flags (this overrides "-s" during extraction) */
	if (NState_GetModFreshen(pState) || NState_GetModUpdate(pState)) {
		err = NuSetValue(pArchive, kNuValueOnlyUpdateOlder, true);
		BailError(err);
	}
	if (NState_GetModFreshen(pState)) {
		err = NuSetValue(pArchive, kNuValueHandleExisting, kNuMustOverwrite);
		BailError(err);
	}

	DBUG(("--- enabling ShrinkIt compatibility mode\n"));
	err = NuSetValue(pArchive, kNuValueMimicSHK, true);
	BailError(err);

	if (strcmp(SYSTEM_DEFAULT_EOL, "\r") == 0)
		err = NuSetValue(pArchive, kNuValueEOL, kNuEOLCR);
	else if (strcmp(SYSTEM_DEFAULT_EOL, "\n") == 0)
		err = NuSetValue(pArchive, kNuValueEOL, kNuEOLLF);
	else if (strcmp(SYSTEM_DEFAULT_EOL, "\r\n") == 0)
		err = NuSetValue(pArchive, kNuValueEOL, kNuEOLCRLF);
	else {
		assert(0);
		err = kNuErrInternal;
		ReportError(err, "Unknown SYSTEM_DEFAULT_EOL '%s'", SYSTEM_DEFAULT_EOL);
		goto bail;
	}
	BailError(err);

bail:
	return err;
}


/*
 * Open the archive in read-write mode, for purposes of adding, deleting,
 * or updating files.  We don't plan on extracting anything with this.
 *
 * "Streaming mode" isn't allowed.
 */
NuError
OpenArchiveReadWrite(NulibState* pState)
{
	NuError err = kNuErrNone;
	NuArchive* pArchive;
	char* tempName = nil;

	assert(pState != nil);
	assert(IsFilenameStdin(NState_GetArchiveFilename(pState)) == false);

	tempName = MakeTempArchiveName(pState);
	if (tempName == nil)
		goto bail;
	DBUG(("TEMP NAME = '%s'\n", tempName));

	err = NuOpenRW(NState_GetArchiveFilename(pState), tempName,
			kNuOpenCreat, &pArchive);
	if (err != kNuErrNone) {
		ReportError(err, "unable to open '%s'",
			NState_GetArchiveFilename(pState));
		goto bail;
	}

	/* introduce them */
	NState_SetNuArchive(pState, pArchive);
	err = NuSetExtraData(pArchive, pState);
	BailError(err);

	err = NuSetSelectionFilter(pArchive, SelectionFilter);
	BailError(err)
	err = NuSetProgressUpdater(pArchive, ProgressUpdater);
	BailError(err)
	err = NuSetErrorHandler(pArchive, ErrorHandler);
	BailError(err)
	/*err = NuSetErrorMessageHandler(pArchive, ErrorMessageHandler);*/

	/* handle "-0" flag */
	if (NState_GetModNoCompression(pState)) {
		err = NuSetValue(pArchive, kNuValueDataCompression, kNuCompressNone);
		BailError(err);
	}

	/* handle "-f" and "-u" flags */
	/* (BUG: if "-f" is set, creating a new archive is impossible) */
	if (NState_GetModFreshen(pState) || NState_GetModUpdate(pState)) {
		err = NuSetValue(pArchive, kNuValueOnlyUpdateOlder, true);
		BailError(err);
	}
	if (NState_GetModFreshen(pState)) {
		err = NuSetValue(pArchive, kNuValueHandleExisting, kNuMustOverwrite);
		BailError(err);
	}

	DBUG(("--- enabling ShrinkIt compatibility mode\n"));
	err = NuSetValue(pArchive, kNuValueMimicSHK, true);
	BailError(err);

	/* this probably isn't needed here, but set it anyway */
	if (strcmp(SYSTEM_DEFAULT_EOL, "\r") == 0)
		err = NuSetValue(pArchive, kNuValueEOL, kNuEOLCR);
	else if (strcmp(SYSTEM_DEFAULT_EOL, "\n") == 0)
		err = NuSetValue(pArchive, kNuValueEOL, kNuEOLLF);
	else if (strcmp(SYSTEM_DEFAULT_EOL, "\r\n") == 0)
		err = NuSetValue(pArchive, kNuValueEOL, kNuEOLCRLF);
	else {
		assert(0);
		err = kNuErrInternal;
		ReportError(err, "Unknown SYSTEM_DEFAULT_EOL '%s'", SYSTEM_DEFAULT_EOL);
		goto bail;
	}
	BailError(err);

	/*(void) NuSetValue(pArchive, kNuValueAllowDuplicates, true);*/

bail:
	Free(tempName);
	return err;
}