/* 

  * 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;

 }