Esempio n. 1
0
void u0051_hidlookup__create_file__numbers(
	SG_context* pCtx,
	SG_pathname* pPath,
	const char* pszName,
	const SG_uint32 countLines
	)
{
	SG_pathname* pPathFile = NULL;
	SG_uint32 i;
	SG_file* pFile = NULL;

	VERIFY_ERR_CHECK(  SG_PATHNAME__ALLOC__PATHNAME_SZ(pCtx, &pPathFile, pPath, pszName)  );
	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx, pPathFile, SG_FILE_CREATE_NEW | SG_FILE_RDWR, 0600, &pFile)  );
	for (i=0; i<countLines; i++)
	{
		char buf[64];

		VERIFY_ERR_CHECK(  SG_sprintf(pCtx, buf, sizeof(buf), "%d\n", i)  );
		VERIFY_ERR_CHECK(  SG_file__write(pCtx, pFile, (SG_uint32) strlen(buf), (SG_byte*) buf, NULL)  );
	}
	VERIFY_ERR_CHECK(  SG_file__close(pCtx, &pFile)  );

	SG_PATHNAME_NULLFREE(pCtx, pPathFile);

	return;
fail:
	SG_FILE_NULLCLOSE(pCtx, pFile);
	SG_PATHNAME_NULLFREE(pCtx, pPathFile);
}
void SG_unzip__fetch_next_file_into_file(SG_context* pCtx, SG_unzip* punzip, SG_pathname* pPath, SG_bool* pb, const char** ppsz_name, SG_uint64* piLength)
{
   SG_byte* pBytes = NULL;
    SG_uint32 sofar = 0;
    SG_uint32 got = 0;
    SG_file* pFile = NULL;
    SG_bool b = SG_FALSE;
    SG_uint64 len = 0;
    const char* psz_name = NULL;

    SG_ERR_CHECK(  SG_unzip__goto_next_file(pCtx, punzip, &b, &psz_name, &len)  );
    if (!b)
    {
        *pb = SG_FALSE;
        goto done;
    }

	SG_ERR_CHECK(  SG_malloc(pCtx, (SG_uint32)SG_STREAMING_BUFFER_SIZE, &pBytes)  );

    SG_ERR_CHECK(  SG_file__open__pathname(pCtx, pPath, SG_FILE_WRONLY | SG_FILE_CREATE_NEW, 0644, &pFile)  );

    SG_ERR_CHECK(  SG_unzip__currentfile__open(pCtx, punzip)  );
    while (sofar < (SG_uint32) len)
    {
        SG_uint32 want = 0;
        if ((len - sofar) > SG_STREAMING_BUFFER_SIZE)
        {
            want = SG_STREAMING_BUFFER_SIZE;
        }
        else
        {
            want = (SG_uint32) (len - sofar);
        }
        SG_ERR_CHECK(  SG_unzip__currentfile__read(pCtx, punzip, pBytes, want, &got)  );
        if (!got)
        {
            SG_ERR_THROW(  SG_ERR_UNSPECIFIED  ); /* TODO better error */
        }
        SG_ERR_CHECK(  SG_file__write(pCtx, pFile, got, pBytes, NULL)  );

        sofar += got;
    }
    SG_NULLFREE(pCtx, pBytes);
    SG_ERR_CHECK(  SG_file__close(pCtx, &pFile)  );
    SG_ERR_CHECK(  SG_unzip__currentfile__close(pCtx, punzip)  );

    *pb = SG_TRUE;
    *ppsz_name = psz_name;
    *piLength = len;

done:
    /* fall through */

fail:
    SG_FILE_NULLCLOSE(pCtx, pFile);
    SG_NULLFREE(pCtx, pBytes);

}
static void _write_file_chunk(SG_context* pCtx, SG_curl* pCurl, char* buffer, SG_uint32 bufLen, void* pVoidState, SG_uint32* pLenHandled)
{
	SG_file* pFile = (SG_file*)pVoidState;

	SG_ERR_CHECK_RETURN(  _check_for_and_handle_json_500(pCtx, pCurl, buffer, bufLen)  );

	if (bufLen) // libcurl docs say we may be called with zero length if file is empty
		SG_ERR_CHECK_RETURN(  SG_file__write(pCtx, pFile, bufLen, (SG_byte*)buffer, pLenHandled)  );
}
Esempio n. 4
0
void SG_vfile__end(
	SG_context* pCtx,
	SG_vfile** ppvf,
	const SG_vhash* pvh
	)
{
	SG_string* pstr = NULL;
	SG_vfile* pvf = NULL;

	SG_NULLARGCHECK_RETURN(ppvf);

	pvf = *ppvf;

	if (pvh)
	{
		SG_ARGCHECK_RETURN( !(pvf->mode & SG_FILE_RDONLY) , pvh );

		SG_ERR_CHECK(  SG_STRING__ALLOC(pCtx, &pstr)  );

		SG_ERR_CHECK(  SG_vhash__to_json(pCtx, pvh,pstr)  );

		SG_ERR_CHECK(  SG_file__seek(pCtx, pvf->pFile, 0)  );

		SG_ERR_CHECK(  SG_file__truncate(pCtx, pvf->pFile)  );

#if TRACE_VFILE
		SG_ERR_IGNORE(  SG_console(pCtx, SG_CS_STDERR, "VFileEnd: Writing %d bytes to file.\n",
								   SG_string__length_in_bytes(pstr))  );
#endif

		SG_ERR_CHECK(  SG_file__write(pCtx, pvf->pFile, SG_string__length_in_bytes(pstr), (const SG_byte *)SG_string__sz(pstr), NULL)  );
		SG_STRING_NULLFREE(pCtx, pstr);
	}
	else
	{
		if (!(pvf->mode & SG_FILE_RDONLY))
		{
			SG_ERR_CHECK(  SG_file__seek(pCtx, pvf->pFile, 0)  );

			SG_ERR_CHECK(  SG_file__truncate(pCtx, pvf->pFile)  );

#if TRACE_VFILE
			SG_ERR_IGNORE(  SG_console(pCtx, SG_CS_STDERR, "VFileEnd: Truncating file.\n")  );
#endif
		}
	}

	SG_FILE_NULLCLOSE(pCtx, pvf->pFile);

	SG_NULLFREE(pCtx, pvf);
	*ppvf = NULL;

	return;
fail:
	SG_STRING_NULLFREE(pCtx, pstr);
}
void SG_random__write_random_bytes_to_file(SG_context * pCtx, SG_file * pFile, SG_uint64 numBytes)
{
	SG_byte buffer[1024];
	SG_NULLARGCHECK_RETURN(pFile);

	while(numBytes>=1024)
	{
		SG_random_bytes(buffer, 1024);
		SG_ERR_CHECK(  SG_file__write(pCtx, pFile, 1024, buffer, NULL)  );
		numBytes-=1024;
	}

	if(numBytes>0)
	{
		SG_random_bytes(buffer, (SG_uint32)numBytes);
		SG_ERR_CHECK(  SG_file__write(pCtx, pFile, (SG_uint32)numBytes, buffer, NULL)  );
		numBytes-=numBytes;
	}

fail:
	;
}
void u0038_test_version(SG_context * pCtx)
{
	/* This test pokes around in closet internals in ways normal closet callers shouldn't. */

	SG_string* pstrEnv = NULL;
	SG_uint32 len;
	SG_pathname* pPathCloset = NULL;
	SG_pathname* pPathClosetVersion = NULL;
	SG_pathname* pPathClosetVersionBackup = NULL;
	SG_file* pFile = NULL;
	SG_vhash* pvh = NULL;
	
	/* Deliberately making this break for closet version 3 -- current is version 2. */
	SG_byte buf[3]; 
	
	VERIFY_ERR_CHECK(  SG_environment__get__str(pCtx, "SGCLOSET", &pstrEnv, &len)  );
	if (len)
	{
		VERIFY_ERR_CHECK(  SG_PATHNAME__ALLOC__SZ(pCtx, &pPathCloset, SG_string__sz(pstrEnv))  );
	}
	else
	{
		VERIFY_ERR_CHECK(  SG_PATHNAME__ALLOC__USER_APPDATA_DIRECTORY(pCtx, &pPathCloset)  );
		VERIFY_ERR_CHECK(  SG_pathname__append__from_sz(pCtx, pPathCloset, ".sgcloset")  );
	}

	VERIFY_ERR_CHECK(  SG_pathname__alloc__pathname_sz(pCtx, &pPathClosetVersion, pPathCloset, "version")  );
	VERIFY_ERR_CHECK(  SG_pathname__alloc__pathname_sz(pCtx, &pPathClosetVersionBackup, pPathCloset, "version.bak")  );

	VERIFY_ERR_CHECK(  SG_fsobj__move__pathname_pathname(pCtx, pPathClosetVersion, pPathClosetVersionBackup)  );
	
	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx, pPathClosetVersion, SG_FILE_OPEN_OR_CREATE|SG_FILE_WRONLY|SG_FILE_TRUNC, 0644, &pFile)  );
	VERIFY_ERR_CHECK(  SG_file__write(pCtx, pFile, sizeof(buf), buf, NULL)  ); 
	VERIFY_ERR_CHECK(  SG_file__close(pCtx, &pFile)  );

	SG_closet__descriptors__list(pCtx, &pvh);
	VERIFY_COND("", SG_context__err_equals(pCtx, SG_ERR_UNSUPPORTED_CLOSET_VERSION));
	SG_ERR_DISCARD;

	VERIFY_ERR_CHECK(  SG_fsobj__remove__pathname(pCtx, pPathClosetVersion)  );
	VERIFY_ERR_CHECK(  SG_fsobj__move__pathname_pathname(pCtx, pPathClosetVersionBackup, pPathClosetVersion)  );

	/* Common cleanup */
fail:
	SG_STRING_NULLFREE(pCtx, pstrEnv);
	SG_PATHNAME_NULLFREE(pCtx, pPathCloset);
	SG_PATHNAME_NULLFREE(pCtx, pPathClosetVersion);
	SG_PATHNAME_NULLFREE(pCtx, pPathClosetVersionBackup);
	SG_FILE_NULLCLOSE(pCtx, pFile);
	SG_VHASH_NULLFREE(pCtx, pvh);
}
static void read_entire_stream__file(
    SG_context* pCtx,
    CFReadStreamRef myReadStream,
    SG_pathname* pPath,
    CFHTTPMessageRef* pp,
    SG_bool b_progress
)
{
    CFHTTPMessageRef myResponse = NULL;
    CFIndex numBytesRead = 0;
    SG_file* pFile = NULL;
    SG_int64 content_length = 0;
    SG_int64 so_far = 0;

    SG_ERR_CHECK(  SG_file__open__pathname(pCtx, pPath, SG_FILE_CREATE_NEW | SG_FILE_WRONLY, 0644, &pFile)  );
    do
    {
        UInt8 buf[8192]; // TODO
        numBytesRead = CFReadStreamRead(myReadStream, buf, sizeof(buf));
        if( numBytesRead > 0 )
        {
            SG_ERR_CHECK(  SG_file__write(pCtx, pFile, numBytesRead, buf, NULL)  );
            if (!myResponse)
            {
                myResponse = (CFHTTPMessageRef)CFReadStreamCopyProperty(myReadStream, kCFStreamPropertyHTTPResponseHeader);
                CFStringRef contentLengthString = CFHTTPMessageCopyHeaderFieldValue(myResponse, CFSTR("Content-Length"));
                if (contentLengthString)
                {
                    // TODO 32 bit limit problem here
                    content_length = CFStringGetIntValue(contentLengthString);
                    CFRelease(contentLengthString);
                }
                if (b_progress)
                {
                    SG_ERR_CHECK(  SG_log__set_steps(pCtx, content_length / 1024, "KB")  );
                }
            }
            so_far += (SG_uint32) numBytesRead;
            if (b_progress)
            {
                SG_ERR_CHECK(  SG_log__set_finished(pCtx, so_far / 1024)  );
            }
        }
        else if( numBytesRead < 0 )
        {
            CFStreamError myErr = CFReadStreamGetError(myReadStream);
            // TODO clean this up
            if (myErr.domain == kCFStreamErrorDomainPOSIX)
            {
                if (ETIMEDOUT == myErr.error)
                {
                    usleep(5000);
                    numBytesRead = 0;
                }
                else
                {
                    // Interpret myErr.error as a UNIX errno.
                    SG_ERR_THROW(  SG_ERR_ERRNO(myErr.error)  );
                }
            }
            else if (myErr.domain == kCFStreamErrorDomainMacOSStatus)
            {
                // Interpret myErr.error as a MacOS error code.
                // TODO SG_ERR_THROW(  SG_ERR_MAC((OSStatus) myErr.error)  );
                SG_ERR_THROW(  SG_ERR_UNSPECIFIED  );
            }
        }
    } while( numBytesRead > 0 );

    SG_ERR_CHECK(  SG_file__close(pCtx, &pFile)  );

    if (!myResponse)
    {
        myResponse = (CFHTTPMessageRef)CFReadStreamCopyProperty(myReadStream, kCFStreamPropertyHTTPResponseHeader);
    }

    *pp = myResponse;
    myResponse = NULL;

fail:
    if (pFile)
    {
        SG_ERR_CHECK(  SG_file__close(pCtx, &pFile)  );
        // TODO delete it too
    }
    if (myResponse)
    {
        CFRelease(myResponse);
    }
}
Esempio n. 8
0
void MyFn(create_blob_from_file)(SG_context * pCtx,
								 SG_repo * pRepo,
								 const SG_pathname * pPathnameTempDir,
								 SG_uint64 lenFile,
								 const char * szSrc)
{
	// create a file of length "lenFile" in the temp directory.
	// use it to create a blob.
	// try to create it a second time and verify that we get an duplicate-hid error.

	char* pszidGidRandom1 = NULL;
	char* pszidGidRandom2 = NULL;
	SG_pathname * pPathnameTempFile1 = NULL;
	SG_pathname * pPathnameTempFile2 = NULL;
	SG_file * pFileTempFile1 = NULL;
	SG_file * pFileTempFile2 = NULL;
	SG_uint32 lenSrc;
	SG_uint64 lenWritten;
	char* pszidHidBlob1 = NULL;
	char* pszidHidBlob1Dup = NULL;
	char* pszidHidBlob2 = NULL;
	char* pszidHidVerify1 = NULL;
	char* pszidHidVerify2 = NULL;
	SG_bool bEqual;
	SG_repo_tx_handle* pTx = NULL;
	SG_uint64 iBlobFullLength = 0;

	//////////////////////////////////////////////////////////////////
	// create temp-file-1 of length "lenFile" in the temp directory.

	VERIFY_ERR_CHECK_DISCARD(  SG_gid__alloc(pCtx, &pszidGidRandom1)  );
	VERIFY_ERR_CHECK_DISCARD(  SG_gid__alloc(pCtx, &pszidGidRandom2)  );

	VERIFY_ERR_CHECK_DISCARD(  SG_PATHNAME__ALLOC__PATHNAME_SZ(pCtx, &pPathnameTempFile1,pPathnameTempDir,(pszidGidRandom1))  );

	VERIFY_ERR_CHECK_DISCARD(  SG_file__open__pathname(pCtx, pPathnameTempFile1,SG_FILE_RDWR|SG_FILE_CREATE_NEW,0644,&pFileTempFile1)  );

	// write random gid at the beginning of the file
	// so that we won't get collisions if we are called
	// multiple times.

	VERIFY_ERR_CHECK_DISCARD(  SG_file__write(pCtx, pFileTempFile1,(SG_uint32)strlen(pszidGidRandom1),(SG_byte *)pszidGidRandom1,NULL)  );
	VERIFY_ERR_CHECK_DISCARD(  SG_file__write(pCtx, pFileTempFile1,1,(SG_byte *)"\n",NULL)  );

	// generate lots of data in the file so that we'll cause the
	// blob routines to exercise the chunking stuff.

	lenSrc = (SG_uint32)strlen(szSrc);
	lenWritten = 0;
	while (lenWritten < lenFile)
	{
		VERIFY_ERR_CHECK_DISCARD(  SG_file__write(pCtx, pFileTempFile1,lenSrc,(SG_byte *)szSrc,NULL)  );

		lenWritten += lenSrc;
	}
	// the test file does NOT have a final LF.  i'm not sure it matters one way or the
	// other, but i'm just saying that we're not putting on a final LF.

	SG_ERR_IGNORE(  SG_file__seek(pCtx, pFileTempFile1,0)  );

	//////////////////////////////////////////////////////////////////
	// use currently open temp file to create a blob.
	// we get the HID back.  (we need to free it later.)

	VERIFY_ERR_CHECK_DISCARD(  SG_repo__begin_tx(pCtx, pRepo, &pTx)  );
	VERIFY_ERR_CHECK_DISCARD(  SG_repo__store_blob_from_file(pCtx, pRepo,pTx,NULL,SG_FALSE,pFileTempFile1,&pszidHidBlob1,&iBlobFullLength)  );
	VERIFY_ERR_CHECK_DISCARD(  SG_repo__commit_tx(pCtx, pRepo, &pTx)  );

	INFOP("create_blob_from_file",("Created blob [%s]",(pszidHidBlob1)));

	//////////////////////////////////////////////////////////////////
	// try to create blob again and verify we get an duplicate-hid error.

	// Ian TODO: Put this back when SG_ERR_BLOBFILEALREADYEXISTS has been replaced.
// 	VERIFY_ERR_CHECK_DISCARD(  SG_repo__begin_tx(pCtx, pRepo, &pTx)  );
// 	err = SG_repo__store_blob_from_file(pRepo,pTx,SG_FALSE,pFileTempFile1,&pszidHidBlob1Dup);
// 	VERIFYP_CTX_ERR_IS("create_blob_from_file(duplicate)", pCtx, SG_ERR_BLOBFILEALREADYEXISTS, ("Duplicate create failed [%s][%s]",pszidHidBlob1,pszidHidBlob1Dup));
// 	VERIFY_ERR_CHECK_DISCARD(  SG_repo__commit_tx(pCtx, pRepo, SG_DAGNUM__NONE, NULL, &pTx)  );

	//////////////////////////////////////////////////////////////////
	// create empty temp-file-2 and try to read the blob from the repo.

	VERIFY_ERR_CHECK_DISCARD(  SG_PATHNAME__ALLOC__PATHNAME_SZ(pCtx, &pPathnameTempFile2,pPathnameTempDir,(pszidGidRandom2))  );

	VERIFY_ERR_CHECK_DISCARD(  SG_file__open__pathname(pCtx, pPathnameTempFile2,SG_FILE_RDWR|SG_FILE_CREATE_NEW,0644,&pFileTempFile2)  );

	VERIFY_ERR_CHECK_DISCARD(  SG_repo__fetch_blob_into_file(pCtx, pRepo,pszidHidBlob1,pFileTempFile2,NULL)  );

	//////////////////////////////////////////////////////////////////
	// verify that the contents of temp-file-2 is identical to the
	// contents of temp-file-1.  (we already know that the HIDs match
	// and was verified during the fetch, but there are times when the
	// HID is just being used as a key -- it doesn't mean that what we
	// actually restored is correct.

	VERIFY_ERR_CHECK_DISCARD(  SG_repo__alloc_compute_hash__from_file(pCtx, pRepo, pFileTempFile1, &pszidHidVerify1)  );

	VERIFY_ERR_CHECK_DISCARD(  SG_repo__alloc_compute_hash__from_file(pCtx, pRepo, pFileTempFile2, &pszidHidVerify2)  );

	bEqual = (0 == (strcmp(pszidHidVerify1,pszidHidVerify2)));
	VERIFY_COND("create_blob_from_file(verify v1==v2)",bEqual);

	bEqual = (0 == (strcmp(pszidHidVerify1,pszidHidBlob1)));
	VERIFY_COND("create_blob_from_file(verify v1==id)",bEqual);

	//////////////////////////////////////////////////////////////////
	// TODO delete temp source file

	SG_ERR_IGNORE(  SG_file__close(pCtx, &pFileTempFile1)  );
	SG_ERR_IGNORE(  SG_file__close(pCtx, &pFileTempFile2)  );

	//////////////////////////////////////////////////////////////////
	// cleanup

	SG_NULLFREE(pCtx, pszidGidRandom1);
	SG_NULLFREE(pCtx, pszidGidRandom2);
	SG_NULLFREE(pCtx, pszidHidBlob1);
	SG_NULLFREE(pCtx, pszidHidBlob1Dup);
	SG_NULLFREE(pCtx, pszidHidBlob2);
	SG_NULLFREE(pCtx, pszidHidVerify1);
	SG_NULLFREE(pCtx, pszidHidVerify2);
	SG_PATHNAME_NULLFREE(pCtx, pPathnameTempFile1);
	SG_PATHNAME_NULLFREE(pCtx, pPathnameTempFile2);
}
/**
 * create 1 test file.
 * cat it to a second file using files bound to child's STDIN and STDOUT.
 * cat both files to third file using cl args for input and third bound to child's STDOUT.
 * cat all 3 files using cl args to OUR STDOUT.
 */
void MyFn(test1)(SG_context * pCtx)
{
	SG_exit_status exitStatusChild;
	SG_file * pFileF1 = NULL;
	SG_file * pFileF2 = NULL;
	SG_file * pFileF3 = NULL;
	SG_pathname * pPathTempDir = NULL;
	SG_pathname * pPathF1 = NULL;
	SG_pathname * pPathF2 = NULL;
	SG_pathname * pPathF3 = NULL;
	SG_exec_argvec * pArgVec = NULL;

	// create a GID temp directory in the current directory.

	VERIFY_ERR_CHECK(  unittest__alloc_unique_pathname_in_cwd(pCtx,&pPathTempDir)  );
	VERIFY_ERR_CHECK(  SG_fsobj__mkdir_recursive__pathname(pCtx,pPathTempDir)  );

	// create a couple of pathnames to test files in the temp directory.

	VERIFY_ERR_CHECK(  unittest__alloc_unique_pathname_in_dir(pCtx,SG_pathname__sz(pPathTempDir),&pPathF1)  );
	INFOP("exec",("PathF1 is %s",SG_pathname__sz(pPathF1)));
	VERIFY_ERR_CHECK(  unittest__alloc_unique_pathname_in_dir(pCtx,SG_pathname__sz(pPathTempDir),&pPathF2)  );
	INFOP("exec",("PathF2 is %s",SG_pathname__sz(pPathF2)));
	VERIFY_ERR_CHECK(  unittest__alloc_unique_pathname_in_dir(pCtx,SG_pathname__sz(pPathTempDir),&pPathF3)  );
	INFOP("exec",("PathF3 is %s",SG_pathname__sz(pPathF3)));

	//////////////////////////////////////////////////////////////////
	// create F1 and write some data to it.

	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx,pPathF1,SG_FILE_WRONLY|SG_FILE_CREATE_NEW,0644,&pFileF1)  );
	VERIFY_ERR_CHECK(  SG_file__write(pCtx,pFileF1,
									  SG_pathname__length_in_bytes(pPathF1),
									  (SG_byte *)SG_pathname__sz(pPathF1),
									  NULL)  );
	VERIFY_ERR_CHECK(  SG_file__write(pCtx,pFileF1,
									  1,
									  (SG_byte *)"\n",
									  NULL)  );
	VERIFY_ERR_CHECK(  SG_file__write(pCtx,pFileF1,
									  SG_pathname__length_in_bytes(pPathF1),
									  (SG_byte *)SG_pathname__sz(pPathF1),
									  NULL)  );
	VERIFY_ERR_CHECK(  SG_file__write(pCtx,pFileF1,
									  1,
									  (SG_byte *)"\n",
									  NULL)  );
	SG_FILE_NULLCLOSE(pCtx, pFileF1);

	//////////////////////////////////////////////////////////////////
	// re-open F1 for reading.
	// create F2 as a place for STDOUT of command.

	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx,pPathF1,SG_FILE_RDONLY|SG_FILE_OPEN_EXISTING,0644,&pFileF1)  );
	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx,pPathF2,SG_FILE_WRONLY|SG_FILE_CREATE_NEW,   0644,&pFileF2)  );

	// exec: /bin/cat <f1 >f2

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,NULL,pFileF1,pFileF2,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));

	INFOP("/bin/cat <f1 >f2",("Child exit status is [%d]",exitStatusChild));
	SG_FILE_NULLCLOSE(pCtx, pFileF1);
	SG_FILE_NULLCLOSE(pCtx, pFileF2);

	//////////////////////////////////////////////////////////////////
	// let F1 and F2 be given on the command line.
	// create F3 as a place for STDOUT of command.

	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx,pPathF3,SG_FILE_WRONLY|SG_FILE_CREATE_NEW,   0644,&pFileF3)  );

	// exec: /bin/cat -n f1 f2 >f3

	VERIFY_ERR_CHECK(  SG_exec_argvec__alloc(pCtx,&pArgVec)  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,"-n")  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF1))  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF2))  );

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,pArgVec,NULL,pFileF3,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));

	INFOP("/bin/cat -n f1 f2 >f3",("Child exit status is [%d]",exitStatusChild));
	SG_FILE_NULLCLOSE(pCtx, pFileF3);
	SG_EXEC_ARGVEC_NULLFREE(pCtx, pArgVec);

	//////////////////////////////////////////////////////////////////
	// exec: /bin/cat f1 f2 f3 (to our stdout)

	VERIFY_ERR_CHECK(  SG_exec_argvec__alloc(pCtx,&pArgVec)  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF1))  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF2))  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF3))  );

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,pArgVec,NULL,NULL,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));

	INFOP("/bin/cat -n f1 f2 f3",("Child exit status is [%d]",exitStatusChild));
	SG_EXEC_ARGVEC_NULLFREE(pCtx, pArgVec);

	//////////////////////////////////////////////////////////////////
	// exec: /bin/cat f3 f2 f1 (to our stdout)

	VERIFY_ERR_CHECK(  SG_exec_argvec__alloc(pCtx,&pArgVec)  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF3))  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF2))  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF1))  );

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,pArgVec,NULL,NULL,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));

	INFOP("/bin/cat -n f3 f2 f1",("Child exit status is [%d]",exitStatusChild));
	SG_EXEC_ARGVEC_NULLFREE(pCtx, pArgVec);

	// fall through to common cleanup.

fail:
	SG_EXEC_ARGVEC_NULLFREE(pCtx, pArgVec);
	SG_PATHNAME_NULLFREE(pCtx, pPathTempDir);
	SG_PATHNAME_NULLFREE(pCtx, pPathF1);
	SG_PATHNAME_NULLFREE(pCtx, pPathF2);
	SG_PATHNAME_NULLFREE(pCtx, pPathF3);
	SG_FILE_NULLCLOSE(pCtx, pFileF1);
	SG_FILE_NULLCLOSE(pCtx, pFileF2);
	SG_FILE_NULLCLOSE(pCtx, pFileF3);
}
/**
 * create 1 test file.
 * cat it to a second file using files bound to child's STDIN and STDOUT.
 * repeat using still open files.
 * verify that we get an append effect.
 *
 * do this again using input file on the command line into a third file.
 */
void MyFn(test2)(SG_context * pCtx)
{
	SG_exit_status exitStatusChild;
	SG_file * pFileF1 = NULL;
	SG_file * pFileF2 = NULL;
	SG_file * pFileF3 = NULL;
	SG_pathname * pPathTempDir = NULL;
	SG_pathname * pPathF1 = NULL;
	SG_pathname * pPathF2 = NULL;
	SG_pathname * pPathF3 = NULL;
	SG_exec_argvec * pArgVec = NULL;
	SG_uint64 lenFileF1, lenFileF2, lenFileF3;
	SG_uint64 posFileF1, posFileF2, posFileF3;

	// create a GID temp directory in the current directory.

	VERIFY_ERR_CHECK(  unittest__alloc_unique_pathname_in_cwd(pCtx,&pPathTempDir)  );
	VERIFY_ERR_CHECK(  SG_fsobj__mkdir_recursive__pathname(pCtx,pPathTempDir)  );

	// create a couple of pathnames to test files in the temp directory.

	VERIFY_ERR_CHECK(  unittest__alloc_unique_pathname_in_dir(pCtx,SG_pathname__sz(pPathTempDir),&pPathF1)  );
	INFOP("exec",("PathF1 is %s",SG_pathname__sz(pPathF1)));
	VERIFY_ERR_CHECK(  unittest__alloc_unique_pathname_in_dir(pCtx,SG_pathname__sz(pPathTempDir),&pPathF2)  );
	INFOP("exec",("PathF2 is %s",SG_pathname__sz(pPathF2)));
	VERIFY_ERR_CHECK(  unittest__alloc_unique_pathname_in_dir(pCtx,SG_pathname__sz(pPathTempDir),&pPathF3)  );
	INFOP("exec",("PathF3 is %s",SG_pathname__sz(pPathF3)));

	//////////////////////////////////////////////////////////////////
	// create F1 and write some data to it.

	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx,pPathF1,SG_FILE_WRONLY|SG_FILE_CREATE_NEW,0644,&pFileF1)  );
	VERIFY_ERR_CHECK(  SG_file__write(pCtx,pFileF1,
									  SG_pathname__length_in_bytes(pPathF1),
									  (SG_byte *)SG_pathname__sz(pPathF1),
									  NULL)  );
	VERIFY_ERR_CHECK(  SG_file__write(pCtx,pFileF1,
									  1,
									  (SG_byte *)"\n",
									  NULL)  );
	SG_FILE_NULLCLOSE(pCtx, pFileF1);

	// get length of F1 as created on disk.

	VERIFY_ERR_CHECK(  SG_fsobj__length__pathname(pCtx,pPathF1,&lenFileF1,NULL)  );
	INFOP("lenCheck",("Length F1[%d]",(SG_uint32)lenFileF1));
	VERIFY_COND("lenCheck",(lenFileF1 > 0));

	//////////////////////////////////////////////////////////////////
	// re-open F1 for reading.
	// create F2 as a place for STDOUT of command.

	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx,pPathF1,SG_FILE_RDONLY|SG_FILE_OPEN_EXISTING,0644,&pFileF1)  );
	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx,pPathF2,SG_FILE_WRONLY|SG_FILE_CREATE_NEW,   0644,&pFileF2)  );

	// exec: "/bin/cat <f1 >f2" three times holding the file handles open between runs.

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,NULL,pFileF1,pFileF2,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));
	INFOP("/bin/cat <f1 >f2",("Child exit status is [%d]",exitStatusChild));
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF1,&posFileF1)  );
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF2,&posFileF2)  );
	INFOP("tell",("Position F1[%d] Position F2[%d]",(SG_uint32)posFileF1,(SG_uint32)posFileF2));
	VERIFY_COND("tell",(posFileF1 == lenFileF1));		// child has dup'd version of handles and so we share seek positions.
	VERIFY_COND("tell",(posFileF2 == posFileF1));		// so, the child should have caused our position to change.

	VERIFY_ERR_CHECK(  SG_file__seek(pCtx,pFileF1,0)  );

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,NULL,pFileF1,pFileF2,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));
	INFOP("/bin/cat <f1 >f2",("Child exit status is [%d]",exitStatusChild));
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF1,&posFileF1)  );
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF2,&posFileF2)  );
	INFOP("tell",("Position F1[%d] Position F2[%d]",(SG_uint32)posFileF1,(SG_uint32)posFileF2));
	VERIFY_COND("tell",(posFileF1 == lenFileF1));		// child has dup'd version of handles and so we share seek positions.
	VERIFY_COND("tell",(posFileF2 == 2*posFileF1));		// so, the child should have caused our position to change.

	VERIFY_ERR_CHECK(  SG_file__seek(pCtx,pFileF1,0)  );

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,NULL,pFileF1,pFileF2,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));
	INFOP("/bin/cat <f1 >f2",("Child exit status is [%d]",exitStatusChild));
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF1,&posFileF1)  );
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF2,&posFileF2)  );
	INFOP("tell",("Position F1[%d] Position F2[%d]",(SG_uint32)posFileF1,(SG_uint32)posFileF2));
	VERIFY_COND("tell",(posFileF1 == lenFileF1));		// child has dup'd version of handles and so we share seek positions.
	VERIFY_COND("tell",(posFileF2 == 3*posFileF1));		// so, the child should have caused our position to change.

	SG_FILE_NULLCLOSE(pCtx, pFileF1);
	SG_FILE_NULLCLOSE(pCtx, pFileF2);

	// get length of F2 and see how it compares with F1.

	VERIFY_ERR_CHECK(  SG_fsobj__length__pathname(pCtx,pPathF2,&lenFileF2,NULL)  );
	INFOP("lenCheck",("Length F1[%d] Length F2[%d]",(SG_uint32)lenFileF1,(SG_uint32)lenFileF2));
	VERIFY_COND("lenCheck",(lenFileF2 == 3*lenFileF1));

	//////////////////////////////////////////////////////////////////
	// let F1 be given on the command line.
	// create F3 as a place for STDOUT of command.

	VERIFY_ERR_CHECK(  SG_file__open__pathname(pCtx,pPathF3,SG_FILE_WRONLY|SG_FILE_CREATE_NEW,   0644,&pFileF3)  );

	// exec: "/bin/cat f1 >f3" three times holding F3 open between runs.

	VERIFY_ERR_CHECK(  SG_exec_argvec__alloc(pCtx,&pArgVec)  );
	VERIFY_ERR_CHECK(  SG_exec_argvec__append__sz(pCtx,pArgVec,SG_pathname__sz(pPathF1))  );

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,pArgVec,NULL,pFileF3,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));
	INFOP("/bin/cat f1 >f3",("Child exit status is [%d]",exitStatusChild));
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF3,&posFileF3)  );
	INFOP("tell",("Position F3[%d]",(SG_uint32)posFileF3));
	VERIFY_COND("tell",(posFileF3 == lenFileF1));

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,pArgVec,NULL,pFileF3,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));
	INFOP("/bin/cat f1 >f3",("Child exit status is [%d]",exitStatusChild));
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF3,&posFileF3)  );
	INFOP("tell",("Position F3[%d]",(SG_uint32)posFileF3));
	VERIFY_COND("tell",(posFileF3 == 2*lenFileF1));

	VERIFY_ERR_CHECK(  SG_exec__exec_sync__files(pCtx,MY_CAT_COMMAND,pArgVec,NULL,pFileF3,NULL,&exitStatusChild)  );
	VERIFY_COND("child status",(exitStatusChild == 0));
	INFOP("/bin/cat f1 >f3",("Child exit status is [%d]",exitStatusChild));
	VERIFY_ERR_CHECK(  SG_file__tell(pCtx,pFileF3,&posFileF3)  );
	INFOP("tell",("Position F3[%d]",(SG_uint32)posFileF3));
	VERIFY_COND("tell",(posFileF3 == 3*lenFileF1));

	SG_FILE_NULLCLOSE(pCtx, pFileF3);

	// get length of F3 and see how it compares with F1.

	VERIFY_ERR_CHECK(  SG_fsobj__length__pathname(pCtx,pPathF3,&lenFileF3,NULL)  );
	INFOP("lenCheck",("Length F1[%d] Length F3[%d]",(SG_uint32)lenFileF1,(SG_uint32)lenFileF3));
	VERIFY_COND("tell",(lenFileF3 == 3*lenFileF1));

	//////////////////////////////////////////////////////////////////

	// fall through to common cleanup.

fail:
	SG_EXEC_ARGVEC_NULLFREE(pCtx, pArgVec);
	SG_PATHNAME_NULLFREE(pCtx, pPathTempDir);
	SG_PATHNAME_NULLFREE(pCtx, pPathF1);
	SG_PATHNAME_NULLFREE(pCtx, pPathF2);
	SG_PATHNAME_NULLFREE(pCtx, pPathF3);
	SG_FILE_NULLCLOSE(pCtx, pFileF1);
	SG_FILE_NULLCLOSE(pCtx, pFileF2);
	SG_FILE_NULLCLOSE(pCtx, pFileF3);
}