/* 

 * tclUnixTest.c --

 *

 *	Contains platform specific test commands for the Unix platform.

 *

 * Copyright (c) 1996-1997 Sun Microsystems, Inc.

 * Copyright (c) 1998 by Scriptics Corporation.

 * Portions Copyright (c) 2007 Nokia Corporation and/or its subsidiaries. All rights reserved.   

 *

 * See the file "license.terms" for information on usage and redistribution

 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.

 *

 * RCS: @(#) $Id: tclUnixTest.c,v 1.14.2.2 2006/03/19 22:47:30 vincentdarley Exp $

 */

#include "tclInt.h"

#include "tclPort.h"

#if defined(__SYMBIAN32__) 

#include "tclSymbianGlobals.h"

#endif 

/*

 * The headers are needed for the testalarm command that verifies the

 * use of SA_RESTART in signal handlers.

 */

#ifndef __SYMBIAN32__  

#include <signal.h>

#endif

#include <sys/resource.h>

/*

 * The following macros convert between TclFile's and fd's.  The conversion

 * simple involves shifting fd's up by one to ensure that no valid fd is ever

 * the same as NULL.  Note that this code is duplicated from tclUnixPipe.c

 */

#define MakeFile(fd) ((TclFile)((fd)+1))

#define GetFd(file) (((int)file)-1)

/*

 * The stuff below is used to keep track of file handlers created and

 * exercised by the "testfilehandler" command.

 */

typedef struct Pipe {

    TclFile readFile;		/* File handle for reading from the

				 * pipe.  NULL means pipe doesn't exist yet. */

    TclFile writeFile;		/* File handle for writing from the

				 * pipe. */

    int readCount;		/* Number of times the file handler for

				 * this file has triggered and the file

				 * was readable. */

    int writeCount;		/* Number of times the file handler for

				 * this file has triggered and the file

				 * was writable. */

} Pipe;

#define MAX_PIPES 10

static Pipe testPipes[MAX_PIPES];

/*

 * The stuff below is used by the testalarm and testgotsig ommands.

 */

static char *gotsig = "0";

/*

 * Forward declarations of procedures defined later in this file:

 */

static void		TestFileHandlerProc _ANSI_ARGS_((ClientData clientData,

			    int mask));

static int		TestfilehandlerCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

static int		TestfilewaitCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

static int		TestfindexecutableCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

static int		TestgetopenfileCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

static int		TestgetdefencdirCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

static int		TestsetdefencdirCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

int			TclplatformtestInit _ANSI_ARGS_((Tcl_Interp *interp));

static int		TestalarmCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

static int		TestgotsigCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

static void 		AlarmHandler _ANSI_ARGS_(());

static int		TestchmodCmd _ANSI_ARGS_((ClientData dummy,

			    Tcl_Interp *interp, int argc, CONST char **argv));

/*

 *----------------------------------------------------------------------

 *

 * TclplatformtestInit --

 *

 *	Defines commands that test platform specific functionality for

 *	Unix platforms.

 *

 * Results:

 *	A standard Tcl result.

 *

 * Side effects:

 *	Defines new commands.

 *

 *----------------------------------------------------------------------

 */

int

TclplatformtestInit(interp)

    Tcl_Interp *interp;		/* Interpreter to add commands to. */

{

    Tcl_CreateCommand(interp, "testchmod", TestchmodCmd,

	    (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateCommand(interp, "testfilehandler", TestfilehandlerCmd,

            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateCommand(interp, "testfilewait", TestfilewaitCmd,

            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateCommand(interp, "testfindexecutable", TestfindexecutableCmd,

            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateCommand(interp, "testgetopenfile", TestgetopenfileCmd,

            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateCommand(interp, "testgetdefenc", TestgetdefencdirCmd,

            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    Tcl_CreateCommand(interp, "testsetdefenc", TestsetdefencdirCmd,

            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

#ifndef __SYMBIAN32__            

 // Symbian and PIPS don't support signals.           

    Tcl_CreateCommand(interp, "testalarm", TestalarmCmd,

            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

#endif

    Tcl_CreateCommand(interp, "testgotsig", TestgotsigCmd,

            (ClientData) 0, (Tcl_CmdDeleteProc *) NULL);

    return TCL_OK;

}

/*

 *----------------------------------------------------------------------

 *

 * TestfilehandlerCmd --

 *

 *	This procedure implements the "testfilehandler" command. It is

 *	used to test Tcl_CreateFileHandler, Tcl_DeleteFileHandler, and

 *	TclWaitForFile.

 *

 * Results:

 *	A standard Tcl result.

 *

 * Side effects:

 *	None.

 *

 *----------------------------------------------------------------------

 */

static int

TestfilehandlerCmd(clientData, interp, argc, argv)

    ClientData clientData;		/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

    Pipe *pipePtr;

    int i, mask, timeout;

    static int initialized = 0;

    char buffer[4000];

    TclFile file;

    /*

     * NOTE: When we make this code work on Windows also, the following

     * variable needs to be made Unix-only.

     */

    if (!initialized) {

	for (i = 0; i < MAX_PIPES; i++) {

	    testPipes[i].readFile = NULL;

	}

	initialized = 1;

    }

    if (argc < 2) {

	Tcl_AppendResult(interp, "wrong # arguments: should be \"", argv[0],

                " option ... \"", (char *) NULL);

        return TCL_ERROR;

    }

    pipePtr = NULL;

    if (argc >= 3) {

	if (Tcl_GetInt(interp, argv[2], &i) != TCL_OK) {

	    return TCL_ERROR;

	}

	if (i >= MAX_PIPES) {

	    Tcl_AppendResult(interp, "bad index ", argv[2], (char *) NULL);

	    return TCL_ERROR;

	}

	pipePtr = &testPipes[i];

    }

    if (strcmp(argv[1], "close") == 0) {

	for (i = 0; i < MAX_PIPES; i++) {

	    if (testPipes[i].readFile != NULL) {

		TclpCloseFile(testPipes[i].readFile);

		testPipes[i].readFile = NULL;

		TclpCloseFile(testPipes[i].writeFile);

		testPipes[i].writeFile = NULL;

	    }

	}

    } else if (strcmp(argv[1], "clear") == 0) {

	if (argc != 3) {

	    Tcl_AppendResult(interp, "wrong # arguments: should be \"",

                    argv[0], " clear index\"", (char *) NULL);

	    return TCL_ERROR;

	}

	pipePtr->readCount = pipePtr->writeCount = 0;

    } else if (strcmp(argv[1], "counts") == 0) {

	char buf[TCL_INTEGER_SPACE * 2];

	if (argc != 3) {

	    Tcl_AppendResult(interp, "wrong # arguments: should be \"",

                    argv[0], " counts index\"", (char *) NULL);

	    return TCL_ERROR;

	}

	sprintf(buf, "%d %d", pipePtr->readCount, pipePtr->writeCount);

	Tcl_SetResult(interp, buf, TCL_VOLATILE);

    } else if (strcmp(argv[1], "create") == 0) {

	if (argc != 5) {

	    Tcl_AppendResult(interp, "wrong # arguments: should be \"",

                    argv[0], " create index readMode writeMode\"",

                    (char *) NULL);

	    return TCL_ERROR;

	}

	if (pipePtr->readFile == NULL) {

	    if (!TclpCreatePipe(&pipePtr->readFile, &pipePtr->writeFile)) {

		Tcl_AppendResult(interp, "couldn't open pipe: ",

			Tcl_PosixError(interp), (char *) NULL);

		return TCL_ERROR;

	    }

#ifdef O_NONBLOCK

	    fcntl(GetFd(pipePtr->readFile), F_SETFL, O_NONBLOCK);

	    fcntl(GetFd(pipePtr->writeFile), F_SETFL, O_NONBLOCK);

#else

	    Tcl_SetResult(interp, "can't make pipes non-blocking",

		    TCL_STATIC);

	    return TCL_ERROR;

#endif

	}

	pipePtr->readCount = 0;

	pipePtr->writeCount = 0;

	if (strcmp(argv[3], "readable") == 0) {

	    Tcl_CreateFileHandler(GetFd(pipePtr->readFile), TCL_READABLE,

		    TestFileHandlerProc, (ClientData) pipePtr);

	} else if (strcmp(argv[3], "off") == 0) {

	    Tcl_DeleteFileHandler(GetFd(pipePtr->readFile));

	} else if (strcmp(argv[3], "disabled") == 0) {

	    Tcl_CreateFileHandler(GetFd(pipePtr->readFile), 0,

		    TestFileHandlerProc, (ClientData) pipePtr);

	} else {

	    Tcl_AppendResult(interp, "bad read mode \"", argv[3], "\"",

		    (char *) NULL);

	    return TCL_ERROR;

	}

	if (strcmp(argv[4], "writable") == 0) {

	    Tcl_CreateFileHandler(GetFd(pipePtr->writeFile), TCL_WRITABLE,

		    TestFileHandlerProc, (ClientData) pipePtr);

	} else if (strcmp(argv[4], "off") == 0) {

	    Tcl_DeleteFileHandler(GetFd(pipePtr->writeFile));

	} else if (strcmp(argv[4], "disabled") == 0) {

	    Tcl_CreateFileHandler(GetFd(pipePtr->writeFile), 0,

		    TestFileHandlerProc, (ClientData) pipePtr);

	} else {

	    Tcl_AppendResult(interp, "bad read mode \"", argv[4], "\"",

		    (char *) NULL);

	    return TCL_ERROR;

	}

    } else if (strcmp(argv[1], "empty") == 0) {

	if (argc != 3) {

	    Tcl_AppendResult(interp, "wrong # arguments: should be \"",

                    argv[0], " empty index\"", (char *) NULL);

	    return TCL_ERROR;

	}

        while (read(GetFd(pipePtr->readFile), buffer, 4000) > 0) {

            /* Empty loop body. */

        }

    } else if (strcmp(argv[1], "fill") == 0) {

	if (argc != 3) {

	    Tcl_AppendResult(interp, "wrong # arguments: should be \"",

                    argv[0], " fill index\"", (char *) NULL);

	    return TCL_ERROR;

	}

	memset((VOID *) buffer, 'a', 4000);

        while (write(GetFd(pipePtr->writeFile), buffer, 4000) > 0) {

            /* Empty loop body. */

        }

    } else if (strcmp(argv[1], "fillpartial") == 0) {

	char buf[TCL_INTEGER_SPACE];

	if (argc != 3) {

	    Tcl_AppendResult(interp, "wrong # arguments: should be \"",

                    argv[0], " fillpartial index\"", (char *) NULL);

	    return TCL_ERROR;

	}

	memset((VOID *) buffer, 'b', 10);

	TclFormatInt(buf, write(GetFd(pipePtr->writeFile), buffer, 10));

	Tcl_SetResult(interp, buf, TCL_VOLATILE);

    } else if (strcmp(argv[1], "oneevent") == 0) {

	Tcl_DoOneEvent(TCL_FILE_EVENTS|TCL_DONT_WAIT);

    } else if (strcmp(argv[1], "wait") == 0) {

	if (argc != 5) {

	    Tcl_AppendResult(interp, "wrong # arguments: should be \"",

                    argv[0], " wait index readable|writable timeout\"",

                    (char *) NULL);

	    return TCL_ERROR;

	}

	if (pipePtr->readFile == NULL) {

	    Tcl_AppendResult(interp, "pipe ", argv[2], " doesn't exist",

		    (char *) NULL);

	    return TCL_ERROR;

	}

	if (strcmp(argv[3], "readable") == 0) {

	    mask = TCL_READABLE;

	    file = pipePtr->readFile;

	} else {

	    mask = TCL_WRITABLE;

	    file = pipePtr->writeFile;

	}

	if (Tcl_GetInt(interp, argv[4], &timeout) != TCL_OK) {

	    return TCL_ERROR;

	}

	i = TclUnixWaitForFile(GetFd(file), mask, timeout);

	if (i & TCL_READABLE) {

	    Tcl_AppendElement(interp, "readable");

	}

	if (i & TCL_WRITABLE) {

	    Tcl_AppendElement(interp, "writable");

	}

    } else if (strcmp(argv[1], "windowevent") == 0) {

	Tcl_DoOneEvent(TCL_WINDOW_EVENTS|TCL_DONT_WAIT);

    } else {

	Tcl_AppendResult(interp, "bad option \"", argv[1],

		"\": must be close, clear, counts, create, empty, fill, ",

		"fillpartial, oneevent, wait, or windowevent",

		(char *) NULL);

	return TCL_ERROR;

    }

    return TCL_OK;

}

static void TestFileHandlerProc(clientData, mask)

    ClientData clientData;	/* Points to a Pipe structure. */

    int mask;			/* Indicates which events happened:

				 * TCL_READABLE or TCL_WRITABLE. */

{

    Pipe *pipePtr = (Pipe *) clientData;

    if (mask & TCL_READABLE) {

	pipePtr->readCount++;

    }

    if (mask & TCL_WRITABLE) {

	pipePtr->writeCount++;

    }

}

/*

 *----------------------------------------------------------------------

 *

 * TestfilewaitCmd --

 *

 *	This procedure implements the "testfilewait" command. It is

 *	used to test TclUnixWaitForFile.

 *

 * Results:

 *	A standard Tcl result.

 *

 * Side effects:

 *	None.

 *

 *----------------------------------------------------------------------

 */

static int

TestfilewaitCmd(clientData, interp, argc, argv)

    ClientData clientData;		/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

    int mask, result, timeout;

    Tcl_Channel channel;

    int fd;

    ClientData data;

    if (argc != 4) {

	Tcl_AppendResult(interp, "wrong # arguments: should be \"", argv[0],

		" file readable|writable|both timeout\"", (char *) NULL);

	return TCL_ERROR;

    }

    channel = Tcl_GetChannel(interp, argv[1], NULL);

    if (channel == NULL) {

	return TCL_ERROR;

    }

    if (strcmp(argv[2], "readable") == 0) {

	mask = TCL_READABLE;

    } else if (strcmp(argv[2], "writable") == 0){

	mask = TCL_WRITABLE;

    } else if (strcmp(argv[2], "both") == 0){

	mask = TCL_WRITABLE|TCL_READABLE;

    } else {

	Tcl_AppendResult(interp, "bad argument \"", argv[2],

		"\": must be readable, writable, or both", (char *) NULL);

	return TCL_ERROR;

    }

    if (Tcl_GetChannelHandle(channel, 

	    (mask & TCL_READABLE) ? TCL_READABLE : TCL_WRITABLE,

	    (ClientData*) &data) != TCL_OK) {

	Tcl_SetResult(interp, "couldn't get channel file", TCL_STATIC);

	return TCL_ERROR;

    }

    fd = (int) data;

    if (Tcl_GetInt(interp, argv[3], &timeout) != TCL_OK) {

	return TCL_ERROR;

    }

    result = TclUnixWaitForFile(fd, mask, timeout);

    if (result & TCL_READABLE) {

	Tcl_AppendElement(interp, "readable");

    }

    if (result & TCL_WRITABLE) {

	Tcl_AppendElement(interp, "writable");

    }

    return TCL_OK;

}

/*

 *----------------------------------------------------------------------

 *

 * TestfindexecutableCmd --

 *

 *	This procedure implements the "testfindexecutable" command. It is

 *	used to test Tcl_FindExecutable.

 *

 * Results:

 *	A standard Tcl result.

 *

 * Side effects:

 *	None.

 *

 *----------------------------------------------------------------------

 */

static int

TestfindexecutableCmd(clientData, interp, argc, argv)

    ClientData clientData;		/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

    char *oldName;

    char *oldNativeName;

    if (argc != 2) {

	Tcl_AppendResult(interp, "wrong # arguments: should be \"", argv[0],

		" argv0\"", (char *) NULL);

	return TCL_ERROR;

    }

    oldName       = tclExecutableName;

    oldNativeName = tclNativeExecutableName;

    tclExecutableName       = NULL;

    tclNativeExecutableName = NULL;

    Tcl_FindExecutable(argv[1]);

    if (tclExecutableName != NULL) {

	Tcl_SetResult(interp, tclExecutableName, TCL_VOLATILE);

	ckfree(tclExecutableName);

    }

    if (tclNativeExecutableName != NULL) {

	ckfree(tclNativeExecutableName);

    }

    tclExecutableName       = oldName;

    tclNativeExecutableName = oldNativeName;

    return TCL_OK;

}

/*

 *----------------------------------------------------------------------

 *

 * TestgetopenfileCmd --

 *

 *	This procedure implements the "testgetopenfile" command. It is

 *	used to get a FILE * value from a registered channel.

 *

 * Results:

 *	A standard Tcl result.

 *

 * Side effects:

 *	None.

 *

 *----------------------------------------------------------------------

 */

static int

TestgetopenfileCmd(clientData, interp, argc, argv)

    ClientData clientData;		/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

    ClientData filePtr;

    if (argc != 3) {

        Tcl_AppendResult(interp,

                "wrong # args: should be \"", argv[0],

                " channelName forWriting\"",

                (char *) NULL);

        return TCL_ERROR;

    }

    if (Tcl_GetOpenFile(interp, argv[1], atoi(argv[2]), 1, &filePtr)

            == TCL_ERROR) {

        return TCL_ERROR;

    }

    if (filePtr == (ClientData) NULL) {

        Tcl_AppendResult(interp,

                "Tcl_GetOpenFile succeeded but FILE * NULL!", (char *) NULL);

        return TCL_ERROR;

    }

    return TCL_OK;

}

/*

 *----------------------------------------------------------------------

 *

 * TestsetdefencdirCmd --

 *

 *	This procedure implements the "testsetdefenc" command. It is

 *	used to set the value of tclDefaultEncodingDir.

 *

 * Results:

 *	A standard Tcl result.

 *

 * Side effects:

 *	None.

 *

 *----------------------------------------------------------------------

 */

static int

TestsetdefencdirCmd(clientData, interp, argc, argv)

    ClientData clientData;		/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

    if (argc != 2) {

        Tcl_AppendResult(interp,

                "wrong # args: should be \"", argv[0],

                " defaultDir\"",

                (char *) NULL);

        return TCL_ERROR;

    }

    if (tclDefaultEncodingDir != NULL) {

	ckfree(tclDefaultEncodingDir);

	tclDefaultEncodingDir = NULL;

    }

    if (*argv[1] != '\0') {

	tclDefaultEncodingDir = (char *)

	    ckalloc((unsigned) strlen(argv[1]) + 1);

	strcpy(tclDefaultEncodingDir, argv[1]);

    }

    return TCL_OK;

}

/*

 *----------------------------------------------------------------------

 *

 * TestgetdefencdirCmd --

 *

 *	This procedure implements the "testgetdefenc" command. It is

 *	used to get the value of tclDefaultEncodingDir.

 *

 * Results:

 *	A standard Tcl result.

 *

 * Side effects:

 *	None.

 *

 *----------------------------------------------------------------------

 */

static int

TestgetdefencdirCmd(clientData, interp, argc, argv)

    ClientData clientData;		/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

    if (argc != 1) {

        Tcl_AppendResult(interp,

                "wrong # args: should be \"", argv[0],

                (char *) NULL);

        return TCL_ERROR;

    }

    if (tclDefaultEncodingDir != NULL) {

        Tcl_AppendResult(interp, tclDefaultEncodingDir, (char *) NULL);

    }

    return TCL_OK;

}

/*

 *----------------------------------------------------------------------

 * TestalarmCmd --

 *

 *	Test that EINTR is handled correctly by generating and

 *	handling a signal.  This requires using the SA_RESTART

 *	flag when registering the signal handler.

 *

 * Results:

 *	None.

 *

 * Side Effects:

 *	Sets up an signal and async handlers.

 *

 *----------------------------------------------------------------------

 */

static int

TestalarmCmd(clientData, interp, argc, argv)

    ClientData clientData;		/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

#ifdef SA_RESTART

    unsigned int sec;

    struct sigaction action;

    if (argc > 1) {

	Tcl_GetInt(interp, argv[1], (int *)&sec);

    } else {

	sec = 1;

    }

    /*

     * Setup the signal handling that automatically retries

     * any interupted I/O system calls.

     */

    action.sa_handler = AlarmHandler;

    memset((void *)&action.sa_mask, 0, sizeof(sigset_t));

    action.sa_flags = SA_RESTART;

    if (sigaction(SIGALRM, &action, NULL) < 0) {

	Tcl_AppendResult(interp, "sigaction: ", Tcl_PosixError(interp), NULL);

	return TCL_ERROR;

    }

    (void)alarm(sec);

    return TCL_OK;

#else

    Tcl_AppendResult(interp, "warning: sigaction SA_RESTART not support on this platform", NULL);

    return TCL_ERROR;

#endif

}

/*

 *----------------------------------------------------------------------

 *

 * AlarmHandler --

 *

 *	Signal handler for the alarm command.

 *

 * Results:

 *	None.

 *

 * Side effects:

 * 	Calls the Tcl Async handler.

 *

 *----------------------------------------------------------------------

 */

static void

AlarmHandler()

{

    gotsig = "1";

}

/*

 *----------------------------------------------------------------------

 * TestgotsigCmd --

 *

 * 	Verify the signal was handled after the testalarm command.

 *

 * Results:

 *	None.

 *

 * Side Effects:

 *	Resets the value of gotsig back to '0'.

 *

 *----------------------------------------------------------------------

 */

static int

TestgotsigCmd(clientData, interp, argc, argv)

    ClientData clientData;		/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

    Tcl_AppendResult(interp, gotsig, (char *) NULL);

    gotsig = "0";

    return TCL_OK;

}

/*

 *---------------------------------------------------------------------------

 *

 * TestchmodCmd --

 *

 *	Implements the "testchmod" cmd.  Used when testing "file" command.

 *	The only attribute used by the Windows platform is the user write

 *	flag; if this is not set, the file is made read-only.  Otehrwise, the

 *	file is made read-write.

 *

 * Results:

 *	A standard Tcl result.

 *

 * Side effects:

 *	Changes permissions of specified files.

 *

 *---------------------------------------------------------------------------

 */

static int

TestchmodCmd(dummy, interp, argc, argv)

    ClientData dummy;			/* Not used. */

    Tcl_Interp *interp;			/* Current interpreter. */

    int argc;				/* Number of arguments. */

    CONST char **argv;			/* Argument strings. */

{

    int i, mode;

    char *rest;

    if (argc < 2) {

	usage:

	Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],

		" mode file ?file ...?", NULL);

	return TCL_ERROR;

    }

    mode = (int) strtol(argv[1], &rest, 8);

    if ((rest == argv[1]) || (*rest != '\0')) {

	goto usage;

    }

    for (i = 2; i < argc; i++) {

	Tcl_DString buffer;

	CONST char *translated;

	translated = Tcl_TranslateFileName(interp, argv[i], &buffer);

	if (translated == NULL) {

	    return TCL_ERROR;

	}

	if (chmod(translated, (unsigned) mode) != 0) {

	    Tcl_AppendResult(interp, translated, ": ", Tcl_PosixError(interp),

		    NULL);

	    return TCL_ERROR;

	}

	Tcl_DStringFree(&buffer);

    }

    return TCL_OK;

}