/* 
 * tclUnixFile.c --
 *
 *      This file contains wrappers around UNIX file handling functions.
 *      These wrappers mask differences between Windows and UNIX.
 *
 * Copyright (c) 1995-1998 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: tclUnixFile.c,v 1.12.8.3 2002/08/20 20:25:30 das Exp $
 */

#include "tclInt.h"
#include "tclPort.h"

static int NativeMatchType(CONST char* nativeName, Tcl_GlobTypeData *types);

	/*
	 * INTL: The following calls to access() and stat() should not be
	 * converted to Tclp routines because they need to operate on native
	 * strings directly.
	 */

	if ((access(name, X_OK) == 0)			/* INTL: Native. */
		&& (TclOSstat(name, &statBuf) == 0)	/* INTL: Native. */
		&& S_ISREG(statBuf.st_mode)) {
	    goto gotName;
	}
	if (*p == '\0') {
	    break;
	} else if (*(p+1) == 0) {
	    p = "./";

	/*
	 * Now open the directory for reading and iterate over the contents.
	 */

	native = Tcl_UtfToExternalDString(NULL, dirName, -1, &ds);

	if ((TclOSstat(native, &statBuf) != 0)		/* INTL: Native. */
		|| !S_ISDIR(statBuf.st_mode)) {
	    Tcl_DStringFree(&dsOrig);
	    Tcl_DStringFree(&ds);
	    return TCL_OK;
	}

	d = opendir(native);				/* INTL: Native. */

	nativeDirLen = Tcl_DStringLength(&ds);

	while (1) {
	    Tcl_DString utfDs;
	    CONST char *utf;
	    Tcl_DirEntry *entryPtr;
	    
	    entryPtr = TclOSreaddir(d);			/* INTL: Native. */
	    if (entryPtr == NULL) {
		break;
	    }
	    if (types != NULL && (types->perm & TCL_GLOB_PERM_HIDDEN)) {
		/* 
		 * We explicitly asked for hidden files, so turn around
		 * and ignore any file which isn't hidden.

    if (types == NULL) {
	/* 
	 * Simply check for the file's existence, but do it
	 * with lstat, in case it is a link to a file which
	 * doesn't exist (since that case would not show up
	 * if we used 'access' or 'stat')
	 */
	if (TclOSlstat(nativeEntry, &buf) != 0) {
	    return 0;
	}
    } else {
	if (types->perm != 0) {
	    if (TclOSstat(nativeEntry, &buf) != 0) {
		/* 
		 * Either the file has disappeared between the
		 * 'readdir' call and the 'stat' call, or
		 * the file is a link to a file which doesn't
		 * exist (which we could ascertain with
		 * lstat), or there is some other strange
		 * problem.  In all these cases, we define this

		) {
		return 0;
	    }
	}
	if (types->type != 0) {
	    if (types->perm == 0) {
		/* We haven't yet done a stat on the file */
		if (TclOSstat(nativeEntry, &buf) != 0) {
		    /* Posix error occurred */
		    return 0;
		}
	    }
	    /*
	     * In order bcdpfls as in 'find -t'
	     */
	    if (
		((types->type & TCL_GLOB_TYPE_BLOCK) &&
			S_ISBLK(buf.st_mode)) ||
		((types->type & TCL_GLOB_TYPE_CHAR) &&
			S_ISCHR(buf.st_mode)) ||
		((types->type & TCL_GLOB_TYPE_DIR) &&
			S_ISDIR(buf.st_mode)) ||
		((types->type & TCL_GLOB_TYPE_PIPE) &&
			S_ISFIFO(buf.st_mode)) ||
		((types->type & TCL_GLOB_TYPE_FILE) &&
			S_ISREG(buf.st_mode))
#ifdef S_ISSOCK
		|| ((types->type & TCL_GLOB_TYPE_SOCK) &&
			S_ISSOCK(buf.st_mode))
#endif /* S_ISSOCK */
		) {
		/* Do nothing -- this file is ok */
	    } else {
#ifdef S_ISLNK
		if (types->type & TCL_GLOB_TYPE_LINK) {
		    if (TclOSlstat(nativeEntry, &buf) == 0) {
			if (S_ISLNK(buf.st_mode)) {
			    return 1;
			}
		    }
		}
#endif /* S_ISLNK */
		return 0;
	    }
	}
    }
    return 1;
}


 */

int 
TclpObjLstat(pathPtr, bufPtr)
    Tcl_Obj *pathPtr;		/* Path of file to stat */
    Tcl_StatBuf *bufPtr;	/* Filled with results of stat call. */
{
    return TclOSlstat(Tcl_FSGetNativePath(pathPtr), bufPtr);
}

/*
 *---------------------------------------------------------------------------
 *
 * TclpObjGetCwd --
 *

    if (length < 0) {
	return NULL;
    }

    Tcl_ExternalToUtfDString(NULL, link, length, linkPtr);
    return Tcl_DStringValue(linkPtr);
#else
    return NULL;
#endif
}

/*
 *----------------------------------------------------------------------
 *
 * TclpObjStat --

    Tcl_Obj *pathPtr;		/* Path of file to stat */
    Tcl_StatBuf *bufPtr;	/* Filled with results of stat call. */
{
    CONST char *path = Tcl_FSGetNativePath(pathPtr);
    if (path == NULL) {
	return -1;
    } else {
	return TclOSstat(path, bufPtr);
    }
}


#ifdef S_IFLNK

Tcl_Obj* 
TclpObjLink(pathPtr, toPtr, linkAction)
    Tcl_Obj *pathPtr;
    Tcl_Obj *toPtr;
    int linkAction;
{
    if (toPtr != NULL) {
	CONST char *src = Tcl_FSGetNativePath(pathPtr);
	CONST char *target = Tcl_FSGetNativePath(toPtr);
	
	if (src == NULL || target == NULL) {
	    return NULL;
	}
	if (access(src, F_OK) != -1) {
	    /* src exists */
	    errno = EEXIST;
	    return NULL;
	}
	if (access(target, F_OK) == -1) {
	    /* target doesn't exist */
	    errno = ENOENT;
	    return NULL;
	}
	/* 
	 * Check symbolic link flag first, since we prefer to
	 * create these.
	 */
	if (linkAction & TCL_CREATE_SYMBOLIC_LINK) {
	    if (symlink(target, src) != 0) return NULL;
	} else if (linkAction & TCL_CREATE_HARD_LINK) {
	    if (link(target, src) != 0) return NULL;
	} else {
	    errno = ENODEV;
	    return NULL;
	}
	return toPtr;
    } else {
	Tcl_Obj* linkPtr = NULL;

	char link[MAXPATHLEN];
	int length;
	char *native;
	Tcl_DString ds;
	
	if (Tcl_FSGetTranslatedPath(NULL, pathPtr) == NULL) {
	    return NULL;
	}
	length = readlink(Tcl_FSGetNativePath(pathPtr), link, sizeof(link));
	if (length < 0) {
	    return NULL;
	}
	
	/* 
	 * Allocate and copy the name, taking care since the
	 * name need not be null terminated. 
	 */
	native = (char*)ckalloc((unsigned)(1+length));
	strncpy(native, link, (unsigned)length);
	native[length] = '\0';
	
	Tcl_ExternalToUtfDString(NULL, native, length, &ds);
	linkPtr = Tcl_NewStringObj(Tcl_DStringValue(&ds), 
				   Tcl_DStringLength(&ds));
	Tcl_DStringFree(&ds);
	if (linkPtr != NULL) {
	    Tcl_IncrRefCount(linkPtr);
	}
	return linkPtr;
    }
}

#endif


/*
 *---------------------------------------------------------------------------