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[/] [or1k/] [trunk/] [insight/] [tcl/] [win/] [tclWinFCmd.c] - Blame information for rev 1774

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/*
 * tclWinFCmd.c
 *
 *      This file implements the Windows specific portion of file manipulation
 *      subcommands of the "file" command.
 *
 * Copyright (c) 1996-1997 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclWinFCmd.c,v 1.1.1.1 2002-01-16 10:25:38 markom Exp $
 */
 
#include "tclWinInt.h"
 
/*
 * The following constants specify the type of callback when
 * TraverseWinTree() calls the traverseProc()
 */
 
#define DOTREE_PRED   1     /* pre-order directory  */
#define DOTREE_POSTD  2     /* post-order directory */
#define DOTREE_F      3     /* regular file */
 
/*
 * Callbacks for file attributes code.
 */
 
static int              GetWinFileAttributes _ANSI_ARGS_((Tcl_Interp *interp,
                            int objIndex, char *fileName,
                            Tcl_Obj **attributePtrPtr));
static int              GetWinFileLongName _ANSI_ARGS_((Tcl_Interp *interp,
                            int objIndex, char *fileName,
                            Tcl_Obj **attributePtrPtr));
static int              GetWinFileShortName _ANSI_ARGS_((Tcl_Interp *interp,
                            int objIndex, char *fileName,
                            Tcl_Obj **attributePtrPtr));
static int              SetWinFileAttributes _ANSI_ARGS_((Tcl_Interp *interp,
                            int objIndex, char *fileName,
                            Tcl_Obj *attributePtr));
static int              CannotSetAttribute _ANSI_ARGS_((Tcl_Interp *interp,
                            int objIndex, char *fileName,
                            Tcl_Obj *attributePtr));
 
/*
 * Constants and variables necessary for file attributes subcommand.
 */
 
enum {
    WIN_ARCHIVE_ATTRIBUTE,
    WIN_HIDDEN_ATTRIBUTE,
    WIN_LONGNAME_ATTRIBUTE,
    WIN_READONLY_ATTRIBUTE,
    WIN_SHORTNAME_ATTRIBUTE,
    WIN_SYSTEM_ATTRIBUTE
};
 
static int attributeArray[] = {FILE_ATTRIBUTE_ARCHIVE, FILE_ATTRIBUTE_HIDDEN,
        0, FILE_ATTRIBUTE_READONLY, 0, FILE_ATTRIBUTE_SYSTEM};
 
 
char *tclpFileAttrStrings[] = {"-archive", "-hidden", "-longname", "-readonly",
        "-shortname", "-system", (char *) NULL};
CONST TclFileAttrProcs tclpFileAttrProcs[] = {
        {GetWinFileAttributes, SetWinFileAttributes},
        {GetWinFileAttributes, SetWinFileAttributes},
        {GetWinFileLongName, CannotSetAttribute},
        {GetWinFileAttributes, SetWinFileAttributes},
        {GetWinFileShortName, CannotSetAttribute},
        {GetWinFileAttributes, SetWinFileAttributes}};
 
/*
 * Prototype for the TraverseWinTree callback function.
 */
 
typedef int (TraversalProc)(char *src, char *dst, DWORD attr, int type,
        Tcl_DString *errorPtr);
 
/*
 * Declarations for local procedures defined in this file:
 */
 
static void             AttributesPosixError _ANSI_ARGS_((Tcl_Interp *interp,
                            int objIndex, char *fileName, int getOrSet));
static int              ConvertFileNameFormat _ANSI_ARGS_((Tcl_Interp *interp,
                            int objIndex, char *fileName, int longShort,
                            Tcl_Obj **attributePtrPtr));
static int              TraversalCopy(char *src, char *dst, DWORD attr,
                                int type, Tcl_DString *errorPtr);
static int              TraversalDelete(char *src, char *dst, DWORD attr,
                                int type, Tcl_DString *errorPtr);
static int              TraverseWinTree(TraversalProc *traverseProc,
                            Tcl_DString *sourcePtr, Tcl_DString *destPtr,
                            Tcl_DString *errorPtr);
 
 
/*
 *---------------------------------------------------------------------------
 *
 * TclpRenameFile --
 *
 *      Changes the name of an existing file or directory, from src to dst.
 *      If src and dst refer to the same file or directory, does nothing
 *      and returns success.  Otherwise if dst already exists, it will be
 *      deleted and replaced by src subject to the following conditions:
 *          If src is a directory, dst may be an empty directory.
 *          If src is a file, dst may be a file.
 *      In any other situation where dst already exists, the rename will
 *      fail.
 *
 * Results:
 *      If the directory was successfully created, returns TCL_OK.
 *      Otherwise the return value is TCL_ERROR and errno is set to
 *      indicate the error.  Some possible values for errno are:
 *
 *      EACCES:     src or dst parent directory can't be read and/or written.
 *      EEXIST:     dst is a non-empty directory.
 *      EINVAL:     src is a root directory or dst is a subdirectory of src.
 *      EISDIR:     dst is a directory, but src is not.
 *      ENOENT:     src doesn't exist.  src or dst is "".
 *      ENOTDIR:    src is a directory, but dst is not.
 *      EXDEV:      src and dst are on different filesystems.
 *
 *      EACCES:     exists an open file already referring to src or dst.
 *      EACCES:     src or dst specify the current working directory (NT).
 *      EACCES:     src specifies a char device (nul:, com1:, etc.)
 *      EEXIST:     dst specifies a char device (nul:, com1:, etc.) (NT)
 *      EACCES:     dst specifies a char device (nul:, com1:, etc.) (95)
 *
 * Side effects:
 *      The implementation supports cross-filesystem renames of files,
 *      but the caller should be prepared to emulate cross-filesystem
 *      renames of directories if errno is EXDEV.
 *
 *---------------------------------------------------------------------------
 */
 
int
TclpRenameFile(
    char *src,                  /* Pathname of file or dir to be renamed. */
    char *dst)                  /* New pathname for file or directory. */
{
    DWORD srcAttr, dstAttr;
 
    /*
     * Would throw an exception under NT if one of the arguments is a
     * char block device.
     */
 
    /* CYGNUS LOCAL */
#ifndef __GNUC__
    try {
#endif
    /* END CYGNUS LOCAL */
        if (MoveFile(src, dst) != FALSE) {
            return TCL_OK;
        }
    /* CYGNUS LOCAL */
#ifndef __GNUC__
    } except (-1) {}
#endif
    /* END CYGNUS LOCAL */
 
    TclWinConvertError(GetLastError());
 
    srcAttr = GetFileAttributes(src);
    dstAttr = GetFileAttributes(dst);
    if (srcAttr == (DWORD) -1) {
        srcAttr = 0;
    }
    if (dstAttr == (DWORD) -1) {
        dstAttr = 0;
    }
 
    if (errno == EBADF) {
        errno = EACCES;
        return TCL_ERROR;
    }
    if ((errno == EACCES) && (TclWinGetPlatformId() == VER_PLATFORM_WIN32s)) {
        if ((srcAttr != 0) && (dstAttr != 0)) {
            /*
             * Win32s reports trying to overwrite an existing file or directory
             * as EACCES.
             */
 
            errno = EEXIST;
        }
    }
    if (errno == EACCES) {
        decode:
        if (srcAttr & FILE_ATTRIBUTE_DIRECTORY) {
            char srcPath[MAX_PATH], dstPath[MAX_PATH];
            int srcArgc, dstArgc;
            char **srcArgv, **dstArgv;
            char *srcRest, *dstRest;
            int size;
 
            size = GetFullPathName(src, sizeof(srcPath), srcPath, &srcRest);
            if ((size == 0) || (size > sizeof(srcPath))) {
                return TCL_ERROR;
            }
            size = GetFullPathName(dst, sizeof(dstPath), dstPath, &dstRest);
            if ((size == 0) || (size > sizeof(dstPath))) {
                return TCL_ERROR;
            }
            if (srcRest == NULL) {
                srcRest = srcPath + strlen(srcPath);
            }
            if (strnicmp(srcPath, dstPath, srcRest - srcPath) == 0) {
                /*
                 * Trying to move a directory into itself.
                 */
 
                errno = EINVAL;
                return TCL_ERROR;
            }
            Tcl_SplitPath(srcPath, &srcArgc, &srcArgv);
            Tcl_SplitPath(dstPath, &dstArgc, &dstArgv);
            if (srcArgc == 1) {
                /*
                 * They are trying to move a root directory.  Whether
                 * or not it is across filesystems, this cannot be
                 * done.
                 */
 
                errno = EINVAL;
            } else if ((srcArgc > 0) && (dstArgc > 0) &&
                    (stricmp(srcArgv[0], dstArgv[0]) != 0)) {
                /*
                 * If src is a directory and dst filesystem != src
                 * filesystem, errno should be EXDEV.  It is very
                 * important to get this behavior, so that the caller
                 * can respond to a cross filesystem rename by
                 * simulating it with copy and delete.  The MoveFile
                 * system call already handles the case of moving a
                 * file between filesystems.
                 */
 
                errno = EXDEV;
            }
 
            ckfree((char *) srcArgv);
            ckfree((char *) dstArgv);
        }
 
        /*
         * Other types of access failure is that dst is a read-only
         * filesystem, that an open file referred to src or dest, or that
         * src or dest specified the current working directory on the
         * current filesystem.  EACCES is returned for those cases.
         */
 
    } else if (errno == EEXIST) {
        /*
         * Reports EEXIST any time the target already exists.  If it makes
         * sense, remove the old file and try renaming again.
         */
 
        if (srcAttr & FILE_ATTRIBUTE_DIRECTORY) {
            if (dstAttr & FILE_ATTRIBUTE_DIRECTORY) {
                /*
                 * Overwrite empty dst directory with src directory.  The
                 * following call will remove an empty directory.  If it
                 * fails, it's because it wasn't empty.
                 */
 
                if (TclpRemoveDirectory(dst, 0, NULL) == TCL_OK) {
                    /*
                     * Now that that empty directory is gone, we can try
                     * renaming again.  If that fails, we'll put this empty
                     * directory back, for completeness.
                     */
 
                    if (MoveFile(src, dst) != FALSE) {
                        return TCL_OK;
                    }
 
                    /*
                     * Some new error has occurred.  Don't know what it
                     * could be, but report this one.
                     */
 
                    TclWinConvertError(GetLastError());
                    CreateDirectory(dst, NULL);
                    SetFileAttributes(dst, dstAttr);
                    if (errno == EACCES) {
                        /*
                         * Decode the EACCES to a more meaningful error.
                         */
 
                        goto decode;
                    }
                }
            } else {    /* (dstAttr & FILE_ATTRIBUTE_DIRECTORY) == 0 */
                errno = ENOTDIR;
            }
        } else {    /* (srcAttr & FILE_ATTRIBUTE_DIRECTORY) == 0 */
            if (dstAttr & FILE_ATTRIBUTE_DIRECTORY) {
                errno = EISDIR;
            } else {
                /*
                 * Overwrite existing file by:
                 *
                 * 1. Rename existing file to temp name.
                 * 2. Rename old file to new name.
                 * 3. If success, delete temp file.  If failure,
                 *    put temp file back to old name.
                 */
 
                char tempName[MAX_PATH];
                int result, size;
                char *rest;
 
                size = GetFullPathName(dst, sizeof(tempName), tempName, &rest);
                if ((size == 0) || (size > sizeof(tempName)) || (rest == NULL)) {
                    return TCL_ERROR;
                }
                *rest = '\0';
                result = TCL_ERROR;
                if (GetTempFileName(tempName, "tclr", 0, tempName) != 0) {
                    /*
                     * Strictly speaking, need the following DeleteFile and
                     * MoveFile to be joined as an atomic operation so no
                     * other app comes along in the meantime and creates the
                     * same temp file.
                     */
 
                    DeleteFile(tempName);
                    if (MoveFile(dst, tempName) != FALSE) {
                        if (MoveFile(src, dst) != FALSE) {
                            SetFileAttributes(tempName, FILE_ATTRIBUTE_NORMAL);
                            DeleteFile(tempName);
                            return TCL_OK;
                        } else {
                            DeleteFile(dst);
                            MoveFile(tempName, dst);
                        }
                    }
 
                    /*
                     * Can't backup dst file or move src file.  Return that
                     * error.  Could happen if an open file refers to dst.
                     */
 
                    TclWinConvertError(GetLastError());
                    if (errno == EACCES) {
                        /*
                         * Decode the EACCES to a more meaningful error.
                         */
 
                        goto decode;
                    }
                }
                return result;
            }
        }
    }
    return TCL_ERROR;
}
 
/*
 *---------------------------------------------------------------------------
 *
 * TclpCopyFile --
 *
 *      Copy a single file (not a directory).  If dst already exists and
 *      is not a directory, it is removed.
 *
 * Results:
 *      If the file was successfully copied, returns TCL_OK.  Otherwise
 *      the return value is TCL_ERROR and errno is set to indicate the
 *      error.  Some possible values for errno are:
 *
 *      EACCES:     src or dst parent directory can't be read and/or written.
 *      EISDIR:     src or dst is a directory.
 *      ENOENT:     src doesn't exist.  src or dst is "".
 *
 *      EACCES:     exists an open file already referring to dst (95).
 *      EACCES:     src specifies a char device (nul:, com1:, etc.) (NT)
 *      ENOENT:     src specifies a char device (nul:, com1:, etc.) (95)
 *
 * Side effects:
 *      It is not an error to copy to a char device.
 *
 *---------------------------------------------------------------------------
 */
 
int
TclpCopyFile(
    char *src,                  /* Pathname of file to be copied. */
    char *dst)                  /* Pathname of file to copy to. */
{
    /*
     * Would throw an exception under NT if one of the arguments is a char
     * block device.
     */
 
    /* CYGNUS LOCAL */
#ifndef __GNUC__
    try {
#endif /* __GNUC__ */
      if (CopyFile(src, dst, 0) != FALSE) {
            return TCL_OK;
        }
    /* CYGNUS LOCAL */
#ifndef __GNUC__
    } except (-1) {}
#endif /* __GNUC__ */
 
    TclWinConvertError(GetLastError());
    if (errno == EBADF) {
        errno = EACCES;
        return TCL_ERROR;
    }
    if (errno == EACCES) {
        DWORD srcAttr, dstAttr;
 
        srcAttr = GetFileAttributes(src);
        dstAttr = GetFileAttributes(dst);
        if (srcAttr != (DWORD) -1) {
            if (dstAttr == (DWORD) -1) {
                dstAttr = 0;
            }
            if ((srcAttr & FILE_ATTRIBUTE_DIRECTORY) ||
                    (dstAttr & FILE_ATTRIBUTE_DIRECTORY)) {
                errno = EISDIR;
            }
            if (dstAttr & FILE_ATTRIBUTE_READONLY) {
                SetFileAttributes(dst, dstAttr & ~FILE_ATTRIBUTE_READONLY);
                if (CopyFile(src, dst, 0) != FALSE) {
                    return TCL_OK;
                }
                /*
                 * Still can't copy onto dst.  Return that error, and
                 * restore attributes of dst.
                 */
 
                TclWinConvertError(GetLastError());
                SetFileAttributes(dst, dstAttr);
            }
        }
    }
    return TCL_ERROR;
}
 
/*
 *---------------------------------------------------------------------------
 *
 * TclpDeleteFile --
 *
 *      Removes a single file (not a directory).
 *
 * Results:
 *      If the file was successfully deleted, returns TCL_OK.  Otherwise
 *      the return value is TCL_ERROR and errno is set to indicate the
 *      error.  Some possible values for errno are:
 *
 *      EACCES:     a parent directory can't be read and/or written.
 *      EISDIR:     path is a directory.
 *      ENOENT:     path doesn't exist or is "".
 *
 *      EACCES:     exists an open file already referring to path.
 *      EACCES:     path is a char device (nul:, com1:, etc.)
 *
 * Side effects:
 *      The file is deleted, even if it is read-only.
 *
 *---------------------------------------------------------------------------
 */
 
int
TclpDeleteFile(
    char *path)                 /* Pathname of file to be removed. */
{
    DWORD attr;
 
    if (DeleteFile(path) != FALSE) {
        return TCL_OK;
    }
    TclWinConvertError(GetLastError());
    if (path[0] == '\0') {
        /*
         * Win32s thinks that "" is the same as "." and then reports EISDIR
         * instead of ENOENT.
         */
 
        errno = ENOENT;
    } else if (errno == EACCES) {
        attr = GetFileAttributes(path);
        if (attr != (DWORD) -1) {
            if (attr & FILE_ATTRIBUTE_DIRECTORY) {
                /*
                 * Windows NT reports removing a directory as EACCES instead
                 * of EISDIR.
                 */
 
                errno = EISDIR;
            } else if (attr & FILE_ATTRIBUTE_READONLY) {
                SetFileAttributes(path, attr & ~FILE_ATTRIBUTE_READONLY);
                if (DeleteFile(path) != FALSE) {
                    return TCL_OK;
                }
                TclWinConvertError(GetLastError());
                SetFileAttributes(path, attr);
            }
        }
    } else if (errno == ENOENT) {
        attr = GetFileAttributes(path);
        if (attr != (DWORD) -1) {
            if (attr & FILE_ATTRIBUTE_DIRECTORY) {
                /*
                 * Windows 95 reports removing a directory as ENOENT instead
                 * of EISDIR.
                 */
 
                errno = EISDIR;
            }
        }
    } else if (errno == EINVAL) {
        /*
         * Windows NT reports removing a char device as EINVAL instead of
         * EACCES.
         */
 
        errno = EACCES;
    }
 
    return TCL_ERROR;
}
 
/*
 *---------------------------------------------------------------------------
 *
 * TclpCreateDirectory --
 *
 *      Creates the specified directory.  All parent directories of the
 *      specified directory must already exist.  The directory is
 *      automatically created with permissions so that user can access
 *      the new directory and create new files or subdirectories in it.
 *
 * Results:
 *      If the directory was successfully created, returns TCL_OK.
 *      Otherwise the return value is TCL_ERROR and errno is set to
 *      indicate the error.  Some possible values for errno are:
 *
 *      EACCES:     a parent directory can't be read and/or written.
 *      EEXIST:     path already exists.
 *      ENOENT:     a parent directory doesn't exist.
 *
 * Side effects:
 *      A directory is created.
 *
 *---------------------------------------------------------------------------
 */
 
int
TclpCreateDirectory(
    char *path)                 /* Pathname of directory to create */
{
    int error;
 
    if (CreateDirectory(path, NULL) == 0) {
        error = GetLastError();
        if (TclWinGetPlatformId() == VER_PLATFORM_WIN32s) {
            if ((error == ERROR_ACCESS_DENIED)
                    && (GetFileAttributes(path) != (DWORD) -1)) {
                error = ERROR_FILE_EXISTS;
            }
        }
        TclWinConvertError(error);
        return TCL_ERROR;
    }
    return TCL_OK;
}
 
/*
 *---------------------------------------------------------------------------
 *
 * TclpCopyDirectory --
 *
 *      Recursively copies a directory.  The target directory dst must
 *      not already exist.  Note that this function does not merge two
 *      directory hierarchies, even if the target directory is an an
 *      empty directory.
 *
 * Results:
 *      If the directory was successfully copied, returns TCL_OK.
 *      Otherwise the return value is TCL_ERROR, errno is set to indicate
 *      the error, and the pathname of the file that caused the error
 *      is stored in errorPtr.  See TclpCreateDirectory and TclpCopyFile
 *      for a description of possible values for errno.
 *
 * Side effects:
 *      An exact copy of the directory hierarchy src will be created
 *      with the name dst.  If an error occurs, the error will
 *      be returned immediately, and remaining files will not be
 *      processed.
 *
 *---------------------------------------------------------------------------
 */
 
int
TclpCopyDirectory(
    char *src,                  /* Pathname of directory to be copied. */
    char *dst,                  /* Pathname of target directory. */
    Tcl_DString *errorPtr)      /* If non-NULL, initialized DString for
                                 * error reporting. */
{
    int result;
    Tcl_DString srcBuffer;
    Tcl_DString dstBuffer;
 
    Tcl_DStringInit(&srcBuffer);
    Tcl_DStringInit(&dstBuffer);
    Tcl_DStringAppend(&srcBuffer, src, -1);
    Tcl_DStringAppend(&dstBuffer, dst, -1);
    result = TraverseWinTree(TraversalCopy, &srcBuffer, &dstBuffer,
            errorPtr);
    Tcl_DStringFree(&srcBuffer);
    Tcl_DStringFree(&dstBuffer);
    return result;
}
 
/*
 *----------------------------------------------------------------------
 *
 * TclpRemoveDirectory --
 *
 *      Removes directory (and its contents, if the recursive flag is set).
 *
 * Results:
 *      If the directory was successfully removed, returns TCL_OK.
 *      Otherwise the return value is TCL_ERROR, errno is set to indicate
 *      the error, and the pathname of the file that caused the error
 *      is stored in errorPtr.  Some possible values for errno are:
 *
 *      EACCES:     path directory can't be read and/or written.
 *      EEXIST:     path is a non-empty directory.
 *      EINVAL:     path is root directory or current directory.
 *      ENOENT:     path doesn't exist or is "".
 *      ENOTDIR:    path is not a directory.
 *
 *      EACCES:     path is a char device (nul:, com1:, etc.) (95)
 *      EINVAL:     path is a char device (nul:, com1:, etc.) (NT)
 *
 * Side effects:
 *      Directory removed.  If an error occurs, the error will be returned
 *      immediately, and remaining files will not be deleted.
 *
 *----------------------------------------------------------------------
 */
 
int
TclpRemoveDirectory(
    char *path,                 /* Pathname of directory to be removed. */
    int recursive,              /* If non-zero, removes directories that
                                 * are nonempty.  Otherwise, will only remove
                                 * empty directories. */
    Tcl_DString *errorPtr)      /* If non-NULL, initialized DString for
                                 * error reporting. */
{
    int result;
    Tcl_DString buffer;
    DWORD attr;
 
    if (RemoveDirectory(path) != FALSE) {
        return TCL_OK;
    }
    TclWinConvertError(GetLastError());
    if (path[0] == '\0') {
        /*
         * Win32s thinks that "" is the same as "." and then reports EACCES
         * instead of ENOENT.
         */
 
        errno = ENOENT;
    }
    if (errno == EACCES) {
        attr = GetFileAttributes(path);
        if (attr != (DWORD) -1) {
            if ((attr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
                /*
                 * Windows 95 reports calling RemoveDirectory on a file as an
                 * EACCES, not an ENOTDIR.
                 */
 
                errno = ENOTDIR;
                goto end;
            }
 
            if (attr & FILE_ATTRIBUTE_READONLY) {
                attr &= ~FILE_ATTRIBUTE_READONLY;
                if (SetFileAttributes(path, attr) == FALSE) {
                    goto end;
                }
                if (RemoveDirectory(path) != FALSE) {
                    return TCL_OK;
                }
                TclWinConvertError(GetLastError());
                SetFileAttributes(path, attr | FILE_ATTRIBUTE_READONLY);
            }
 
            /*
             * Windows 95 and Win32s report removing a non-empty directory
             * as EACCES, not EEXIST.  If the directory is not empty,
             * change errno so caller knows what's going on.
             */
 
            if (TclWinGetPlatformId() != VER_PLATFORM_WIN32_NT) {
                HANDLE handle;
                WIN32_FIND_DATA data;
                Tcl_DString buffer;
                char *find;
                int len;
 
                Tcl_DStringInit(&buffer);
                find = Tcl_DStringAppend(&buffer, path, -1);
                len = Tcl_DStringLength(&buffer);
                if ((len > 0) && (find[len - 1] != '\\')) {
                    Tcl_DStringAppend(&buffer, "\\", 1);
                }
                find = Tcl_DStringAppend(&buffer, "*.*", 3);
                handle = FindFirstFile(find, &data);
                if (handle != INVALID_HANDLE_VALUE) {
                    while (1) {
                        if ((strcmp(data.cFileName, ".") != 0)
                                && (strcmp(data.cFileName, "..") != 0)) {
                            /*
                             * Found something in this directory.
                             */
 
                            errno = EEXIST;
                            break;
                        }
                        if (FindNextFile(handle, &data) == FALSE) {
                            break;
                        }
                    }
                    FindClose(handle);
                }
                Tcl_DStringFree(&buffer);
            }
        }
    }
    if (errno == ENOTEMPTY) {
        /*
         * The caller depends on EEXIST to signify that the directory is
         * not empty, not ENOTEMPTY.
         */
 
        errno = EEXIST;
    }
    if ((recursive != 0) && (errno == EEXIST)) {
        /*
         * The directory is nonempty, but the recursive flag has been
         * specified, so we recursively remove all the files in the directory.
         */
 
        Tcl_DStringInit(&buffer);
        Tcl_DStringAppend(&buffer, path, -1);
        result = TraverseWinTree(TraversalDelete, &buffer, NULL, errorPtr);
        Tcl_DStringFree(&buffer);
        return result;
    }
 
    end:
    if (errorPtr != NULL) {
        Tcl_DStringAppend(errorPtr, path, -1);
    }
    return TCL_ERROR;
}
 
/*
 *---------------------------------------------------------------------------
 *
 * TraverseWinTree --
 *
 *      Traverse directory tree specified by sourcePtr, calling the function
 *      traverseProc for each file and directory encountered.  If destPtr
 *      is non-null, each of name in the sourcePtr directory is appended to
 *      the directory specified by destPtr and passed as the second argument
 *      to traverseProc() .
 *
 * Results:
 *      Standard Tcl result.
 *
 * Side effects:
 *      None caused by TraverseWinTree, however the user specified
 *      traverseProc() may change state.  If an error occurs, the error will
 *      be returned immediately, and remaining files will not be processed.
 *
 *---------------------------------------------------------------------------
 */
 
static int
TraverseWinTree(
    TraversalProc *traverseProc,/* Function to call for every file and
                                 * directory in source hierarchy. */
    Tcl_DString *sourcePtr,     /* Pathname of source directory to be
                                 * traversed. */
    Tcl_DString *targetPtr,     /* Pathname of directory to traverse in
                                 * parallel with source directory. */
    Tcl_DString *errorPtr)      /* If non-NULL, an initialized DString for
                                 * error reporting. */
{
    DWORD sourceAttr;
    char *source, *target, *errfile;
    int result, sourceLen, targetLen, sourceLenOriginal, targetLenOriginal;
    HANDLE handle;
    WIN32_FIND_DATA data;
 
    result = TCL_OK;
    source = Tcl_DStringValue(sourcePtr);
    sourceLenOriginal = Tcl_DStringLength(sourcePtr);
    if (targetPtr != NULL) {
        target = Tcl_DStringValue(targetPtr);
        targetLenOriginal = Tcl_DStringLength(targetPtr);
    } else {
        target = NULL;
        targetLenOriginal = 0;
    }
 
    errfile = NULL;
 
    sourceAttr = GetFileAttributes(source);
    if (sourceAttr == (DWORD) -1) {
        errfile = source;
        goto end;
    }
    if ((sourceAttr & FILE_ATTRIBUTE_DIRECTORY) == 0) {
        /*
         * Process the regular file
         */
 
        return (*traverseProc)(source, target, sourceAttr, DOTREE_F, errorPtr);
    }
 
    /*
     * When given the pathname of the form "c:\" (one that already ends
     * with a backslash), must make sure not to add another "\" to the end
     * otherwise it will try to access a network drive.
     */
 
    sourceLen = sourceLenOriginal;
    if ((sourceLen > 0) && (source[sourceLen - 1] != '\\')) {
        Tcl_DStringAppend(sourcePtr, "\\", 1);
        sourceLen++;
    }
    source = Tcl_DStringAppend(sourcePtr, "*.*", 3);
    handle = FindFirstFile(source, &data);
    Tcl_DStringSetLength(sourcePtr, sourceLen);
    if (handle == INVALID_HANDLE_VALUE) {
        /*
         * Can't read directory
         */
 
        TclWinConvertError(GetLastError());
        errfile = source;
        goto end;
    }
 
    result = (*traverseProc)(source, target, sourceAttr, DOTREE_PRED, errorPtr);
    if (result != TCL_OK) {
        FindClose(handle);
        return result;
    }
 
    if (targetPtr != NULL) {
        targetLen = targetLenOriginal;
        if ((targetLen > 0) && (target[targetLen - 1] != '\\')) {
            target = Tcl_DStringAppend(targetPtr, "\\", 1);
            targetLen++;
        }
    }
 
    while (1) {
        if ((strcmp(data.cFileName, ".") != 0)
                && (strcmp(data.cFileName, "..") != 0)) {
            /*
             * Append name after slash, and recurse on the file.
             */
 
            Tcl_DStringAppend(sourcePtr, data.cFileName, -1);
            if (targetPtr != NULL) {
                Tcl_DStringAppend(targetPtr, data.cFileName, -1);
            }
            result = TraverseWinTree(traverseProc, sourcePtr, targetPtr,
                    errorPtr);
            if (result != TCL_OK) {
                break;
            }
 
            /*
             * Remove name after slash.
             */
 
            Tcl_DStringSetLength(sourcePtr, sourceLen);
            if (targetPtr != NULL) {
                Tcl_DStringSetLength(targetPtr, targetLen);
            }
        }
        if (FindNextFile(handle, &data) == FALSE) {
            break;
        }
    }
    FindClose(handle);
 
    /*
     * Strip off the trailing slash we added
     */
 
    Tcl_DStringSetLength(sourcePtr, sourceLenOriginal);
    source = Tcl_DStringValue(sourcePtr);
    if (targetPtr != NULL) {
        Tcl_DStringSetLength(targetPtr, targetLenOriginal);
        target = Tcl_DStringValue(targetPtr);
    }
 
    if (result == TCL_OK) {
        /*
         * Call traverseProc() on a directory after visiting all the
         * files in that directory.
         */
 
        result = (*traverseProc)(source, target, sourceAttr,
                DOTREE_POSTD, errorPtr);
    }
    end:
    if (errfile != NULL) {
        TclWinConvertError(GetLastError());
        if (errorPtr != NULL) {
            Tcl_DStringAppend(errorPtr, errfile, -1);
        }
        result = TCL_ERROR;
    }
 
    return result;
}
 
/*
 *----------------------------------------------------------------------
 *
 * TraversalCopy
 *
 *      Called from TraverseUnixTree in order to execute a recursive
 *      copy of a directory.
 *
 * Results:
 *      Standard Tcl result.
 *
 * Side effects:
 *      Depending on the value of type, src may be copied to dst.
 *
 *----------------------------------------------------------------------
 */
 
static int
TraversalCopy(
    char *src,                  /* Source pathname to copy. */
    char *dst,                  /* Destination pathname of copy. */
    DWORD srcAttr,              /* File attributes for src. */
    int type,                   /* Reason for call - see TraverseWinTree() */
    Tcl_DString *errorPtr)      /* If non-NULL, initialized DString for
                                 * error return. */
{
    switch (type) {
        case DOTREE_F:
            if (TclpCopyFile(src, dst) == TCL_OK) {
                return TCL_OK;
            }
            break;
 
        case DOTREE_PRED:
            if (TclpCreateDirectory(dst) == TCL_OK) {
                if (SetFileAttributes(dst, srcAttr) != FALSE) {
                    return TCL_OK;
                }
                TclWinConvertError(GetLastError());
            }
            break;
 
        case DOTREE_POSTD:
            return TCL_OK;
 
    }
 
    /*
     * There shouldn't be a problem with src, because we already
     * checked it to get here.
     */
 
    if (errorPtr != NULL) {
        Tcl_DStringAppend(errorPtr, dst, -1);
    }
    return TCL_ERROR;
}
 
/*
 *----------------------------------------------------------------------
 *
 * TraversalDelete --
 *
 *      Called by procedure TraverseWinTree for every file and
 *      directory that it encounters in a directory hierarchy. This
 *      procedure unlinks files, and removes directories after all the
 *      containing files have been processed.
 *
 * Results:
 *      Standard Tcl result.
 *
 * Side effects:
 *      Files or directory specified by src will be deleted. If an
 *      error occurs, the windows error is converted to a Posix error
 *      and errno is set accordingly.
 *
 *----------------------------------------------------------------------
 */
 
static int
TraversalDelete(
    char *src,                  /* Source pathname. */
    char *ignore,               /* Destination pathname (not used). */
    DWORD srcAttr,              /* File attributes for src (not used). */
    int type,                   /* Reason for call - see TraverseWinTree(). */
    Tcl_DString *errorPtr)      /* If non-NULL, initialized DString for
                                 * error return. */
{
    switch (type) {
        case DOTREE_F:
            if (TclpDeleteFile(src) == TCL_OK) {
                return TCL_OK;
            }
            break;
 
        case DOTREE_PRED:
            return TCL_OK;
 
        case DOTREE_POSTD:
            if (TclpRemoveDirectory(src, 0, NULL) == TCL_OK) {
                return TCL_OK;
            }
            break;
 
    }
 
    if (errorPtr != NULL) {
        Tcl_DStringAppend(errorPtr, src, -1);
    }
    return TCL_ERROR;
}
 
/*
 *----------------------------------------------------------------------
 *
 * AttributesPosixError --
 *
 *      Sets the object result with the appropriate error.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      The interp's object result is set with an error message
 *      based on the objIndex, fileName and errno.
 *
 *----------------------------------------------------------------------
 */
 
static void
AttributesPosixError(
    Tcl_Interp *interp,         /* The interp that has the error */
    int objIndex,               /* The attribute which caused the problem. */
    char *fileName,             /* The name of the file which caused the
                                 * error. */
    int getOrSet)               /* 0 for get; 1 for set */
{
    TclWinConvertError(GetLastError());
    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
            "cannot ", getOrSet ? "set" : "get", " attribute \"",
            tclpFileAttrStrings[objIndex], "\" for file \"", fileName,
            "\": ", Tcl_PosixError(interp), (char *) NULL);
}
 
/*
 *----------------------------------------------------------------------
 *
 * GetWinFileAttributes --
 *
 *      Returns a Tcl_Obj containing the value of a file attribute.
 *      This routine gets the -hidden, -readonly or -system attribute.
 *
 * Results:
 *      Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
 *      will have ref count 0. If the return value is not TCL_OK,
 *      attributePtrPtr is not touched.
 *
 * Side effects:
 *      A new object is allocated if the file is valid.
 *
 *----------------------------------------------------------------------
 */
 
static int
GetWinFileAttributes(
    Tcl_Interp *interp,             /* The interp we are using for errors. */
    int objIndex,                   /* The index of the attribute. */
    char *fileName,                 /* The name of the file. */
    Tcl_Obj **attributePtrPtr)      /* A pointer to return the object with. */
{
    DWORD result = GetFileAttributes(fileName);
 
    if (result == 0xFFFFFFFF) {
        AttributesPosixError(interp, objIndex, fileName, 0);
        return TCL_ERROR;
    }
 
    *attributePtrPtr = Tcl_NewBooleanObj(result & attributeArray[objIndex]);
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * ConvertFileNameFormat --
 *
 *      Returns a Tcl_Obj containing either the long or short version of the
 *      file name.
 *
 * Results:
 *      Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
 *      will have ref count 0. If the return value is not TCL_OK,
 *      attributePtrPtr is not touched.
 *
 * Side effects:
 *      A new object is allocated if the file is valid.
 *
 *----------------------------------------------------------------------
 */
 
static int
ConvertFileNameFormat(
    Tcl_Interp *interp,             /* The interp we are using for errors. */
    int objIndex,                   /* The index of the attribute. */
    char *fileName,                 /* The name of the file. */
    int longShort,                  /* 0 to short name, 1 to long name. */
    Tcl_Obj **attributePtrPtr)      /* A pointer to return the object with. */
{
    HANDLE findHandle;
    WIN32_FIND_DATA findData;
    int pathArgc, i;
    char **pathArgv, **newPathArgv;
    char *currentElement, *resultStr;
    Tcl_DString resultDString;
    int result = TCL_OK;
 
    Tcl_SplitPath(fileName, &pathArgc, &pathArgv);
    newPathArgv = (char **) ckalloc(pathArgc * sizeof(char *));
 
    i = 0;
    if ((pathArgv[0][0] == '/')
            || ((strlen(pathArgv[0]) == 3) && (pathArgv[0][1] == ':'))) {
        newPathArgv[0] = (char *) ckalloc(strlen(pathArgv[0]) + 1);
        strcpy(newPathArgv[0], pathArgv[0]);
        i = 1;
    }
    for ( ; i < pathArgc; i++) {
        if (strcmp(pathArgv[i], ".") == 0) {
            currentElement = ckalloc(2);
            strcpy(currentElement, ".");
        } else if (strcmp(pathArgv[i], "..") == 0) {
            currentElement = ckalloc(3);
            strcpy(currentElement, "..");
        } else {
            int useLong;
 
            Tcl_DStringInit(&resultDString);
            resultStr = Tcl_JoinPath(i + 1, pathArgv, &resultDString);
            findHandle = FindFirstFile(resultStr, &findData);
            if (findHandle == INVALID_HANDLE_VALUE) {
                pathArgc = i - 1;
                AttributesPosixError(interp, objIndex, fileName, 0);
                result = TCL_ERROR;
                Tcl_DStringFree(&resultDString);
                goto cleanup;
            }
            if (longShort) {
                if (findData.cFileName[0] != '\0') {
                    useLong = 1;
                } else {
                    useLong = 0;
                }
            } else {
                if (findData.cAlternateFileName[0] == '\0') {
                    useLong = 1;
                } else {
                    useLong = 0;
                }
            }
            if (useLong) {
                currentElement = ckalloc(strlen(findData.cFileName) + 1);
                strcpy(currentElement, findData.cFileName);
            } else {
                currentElement = ckalloc(strlen(findData.cAlternateFileName)
                        + 1);
                strcpy(currentElement, findData.cAlternateFileName);
            }
            Tcl_DStringFree(&resultDString);
            FindClose(findHandle);
        }
        newPathArgv[i] = currentElement;
    }
 
    Tcl_DStringInit(&resultDString);
    resultStr = Tcl_JoinPath(pathArgc, newPathArgv, &resultDString);
    *attributePtrPtr = Tcl_NewStringObj(resultStr, Tcl_DStringLength(&resultDString));
    Tcl_DStringFree(&resultDString);
 
cleanup:
    for (i = 0; i < pathArgc; i++) {
        ckfree(newPathArgv[i]);
    }
    ckfree((char *) newPathArgv);
    return result;
}
 
/*
 *----------------------------------------------------------------------
 *
 * GetWinFileLongName --
 *
 *      Returns a Tcl_Obj containing the short version of the file
 *      name.
 *
 * Results:
 *      Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
 *      will have ref count 0. If the return value is not TCL_OK,
 *      attributePtrPtr is not touched.
 *
 * Side effects:
 *      A new object is allocated if the file is valid.
 *
 *----------------------------------------------------------------------
 */
 
static int
GetWinFileLongName(
    Tcl_Interp *interp,             /* The interp we are using for errors. */
    int objIndex,                   /* The index of the attribute. */
    char *fileName,                 /* The name of the file. */
    Tcl_Obj **attributePtrPtr)      /* A pointer to return the object with. */
{
    return ConvertFileNameFormat(interp, objIndex, fileName, 1, attributePtrPtr);
}
 
/*
 *----------------------------------------------------------------------
 *
 * GetWinFileShortName --
 *
 *      Returns a Tcl_Obj containing the short version of the file
 *      name.
 *
 * Results:
 *      Standard Tcl result and a Tcl_Obj in attributePtrPtr. The object
 *      will have ref count 0. If the return value is not TCL_OK,
 *      attributePtrPtr is not touched.
 *
 * Side effects:
 *      A new object is allocated if the file is valid.
 *
 *----------------------------------------------------------------------
 */
 
static int
GetWinFileShortName(
    Tcl_Interp *interp,             /* The interp we are using for errors. */
    int objIndex,                   /* The index of the attribute. */
    char *fileName,                 /* The name of the file. */
    Tcl_Obj **attributePtrPtr)      /* A pointer to return the object with. */
{
    return ConvertFileNameFormat(interp, objIndex, fileName, 0, attributePtrPtr);
}
 
/*
 *----------------------------------------------------------------------
 *
 * SetWinFileAttributes --
 *
 *      Set the file attributes to the value given by attributePtr.
 *      This routine sets the -hidden, -readonly, or -system attributes.
 *
 * Results:
 *      Standard TCL error.
 *
 * Side effects:
 *      The file's attribute is set.
 *
 *----------------------------------------------------------------------
 */
 
static int
SetWinFileAttributes(
    Tcl_Interp *interp,             /* The interp we are using for errors. */
    int objIndex,                   /* The index of the attribute. */
    char *fileName,                 /* The name of the file. */
    Tcl_Obj *attributePtr)          /* The new value of the attribute. */
{
    DWORD fileAttributes = GetFileAttributes(fileName);
    int yesNo;
    int result;
 
    if (fileAttributes == 0xFFFFFFFF) {
        AttributesPosixError(interp, objIndex, fileName, 1);
        return TCL_ERROR;
    }
 
    result = Tcl_GetBooleanFromObj(interp, attributePtr, &yesNo);
    if (result != TCL_OK) {
        return result;
    }
 
    if (yesNo) {
        fileAttributes |= (attributeArray[objIndex]);
    } else {
        fileAttributes &= ~(attributeArray[objIndex]);
    }
 
    if (!SetFileAttributes(fileName, fileAttributes)) {
        AttributesPosixError(interp, objIndex, fileName, 1);
        return TCL_ERROR;
    }
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * SetWinFileLongName --
 *
 *      The attribute in question is a readonly attribute and cannot
 *      be set.
 *
 * Results:
 *      TCL_ERROR
 *
 * Side effects:
 *      The object result is set to a pertinant error message.
 *
 *----------------------------------------------------------------------
 */
 
static int
CannotSetAttribute(
    Tcl_Interp *interp,             /* The interp we are using for errors. */
    int objIndex,                   /* The index of the attribute. */
    char *fileName,                 /* The name of the file. */
    Tcl_Obj *attributePtr)          /* The new value of the attribute. */
{
    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
            "cannot set attribute \"", tclpFileAttrStrings[objIndex],
            "\" for file \"", fileName, "\" : attribute is readonly",
            (char *) NULL);
    return TCL_ERROR;
}
 
 
/*
 *---------------------------------------------------------------------------
 *
 * TclpListVolumes --
 *
 *      Lists the currently mounted volumes
 *
 * Results:
 *      A standard Tcl result.  Will always be TCL_OK, since there is no way
 *      that this command can fail.  Also, the interpreter's result is set to
 *      the list of volumes.
 *
 * Side effects:
 *      None
 *
 *---------------------------------------------------------------------------
 */
 
int
TclpListVolumes(
    Tcl_Interp *interp)    /* Interpreter to which to pass the volume list */
{
    Tcl_Obj *resultPtr, *elemPtr;
    char buf[4];
    int i;
 
    resultPtr = Tcl_GetObjResult(interp);
 
    buf[1] = ':';
    buf[2] = '/';
    buf[3] = '\0';
 
    /*
     * On Win32s:
     * GetLogicalDriveStrings() isn't implemented.
     * GetLogicalDrives() returns incorrect information.
     */
 
    for (i = 0; i < 26; i++) {
        buf[0] = (char) ('a' + i);
        if (GetVolumeInformation(buf, NULL, 0, NULL, NULL, NULL, NULL, 0)
                || (GetLastError() == ERROR_NOT_READY)) {
            elemPtr = Tcl_NewStringObj(buf, -1);
            Tcl_ListObjAppendElement(NULL, resultPtr, elemPtr);
        }
    }
    return TCL_OK;
}
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[/] [or1k/] [trunk/] [insight/] [tcl/] [win/] [tclWinFCmd.c] - Blame information for rev 1774

Line No.	Rev	Author	Line
1	578	markom	`/*`
2			`* tclWinFCmd.c`
3			`*`
4			`* This file implements the Windows specific portion of file manipulation`
5			`* subcommands of the "file" command.`
6			`*`
7			`* Copyright (c) 1996-1997 Sun Microsystems, Inc.`
8			`*`
9			`* See the file "license.terms" for information on usage and redistribution`
10			`* of this file, and for a DISCLAIMER OF ALL WARRANTIES.`
11			`*`
12			`* RCS: @(#) $Id: tclWinFCmd.c,v 1.1.1.1 2002-01-16 10:25:38 markom Exp $`
13			`*/`
14
15			`#include "tclWinInt.h"`
16
17			`/*`
18			`* The following constants specify the type of callback when`
19			`* TraverseWinTree() calls the traverseProc()`
20			`*/`
21
22			`#define DOTREE_PRED 1 /* pre-order directory */`
23			`#define DOTREE_POSTD 2 /* post-order directory */`
24			`#define DOTREE_F 3 /* regular file */`
25
26			`/*`
27			`* Callbacks for file attributes code.`
28			`*/`
29
30			`static int GetWinFileAttributes _ANSI_ARGS_((Tcl_Interp *interp,`
31			`int objIndex, char *fileName,`
32			`Tcl_Obj **attributePtrPtr));`
33			`static int GetWinFileLongName _ANSI_ARGS_((Tcl_Interp *interp,`
34			`int objIndex, char *fileName,`
35			`Tcl_Obj **attributePtrPtr));`
36			`static int GetWinFileShortName _ANSI_ARGS_((Tcl_Interp *interp,`
37			`int objIndex, char *fileName,`
38			`Tcl_Obj **attributePtrPtr));`
39			`static int SetWinFileAttributes _ANSI_ARGS_((Tcl_Interp *interp,`
40			`int objIndex, char *fileName,`