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};
/*
* Internal Core Utilities
*/
static const char *xvfs_relativePath(Tcl_Obj *path, struct xvfs_tclfs_instance_info *info) {
const char *pathStr, *rootStr;
const char *pathFinal;
int pathLen, rootLen;
pathStr = Tcl_GetStringFromObj(path, &pathLen);
rootStr = Tcl_GetStringFromObj(info->mountpoint, &rootLen);
if (pathLen < rootLen) {
return(NULL);
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}
/* XXX:TODO: Should this use the native OS path separator ? */
if (pathStr[rootLen] != '/') {
return(NULL);
}
return(pathStr + rootLen + 1);
}
#if 0
/*
* Currently unused
*/
pathFinal = pathStr + rootLen + 1;
pathLen -= rootLen + 1;
if (pathLen == 1 && memcmp(pathFinal, ".", 1) == 0) {
return("");
}
while (pathLen >= 2 && memcmp(pathFinal, "./", 2) == 0) {
pathFinal += 2;
pathLen -= 2;
}
return(pathFinal);
}
static const char *xvfs_perror(int xvfs_error) {
if (xvfs_error >= 0) {
return("Not an error");
}
switch (xvfs_error) {
case XVFS_RV_ERR_ENOENT:
return("No such file or directory");
case XVFS_RV_ERR_EINVAL:
return("Invalid argument");
case XVFS_RV_ERR_EISDIR:
return("Is a directory");
case XVFS_RV_ERR_ENOTDIR:
return("Not a directory");
case XVFS_RV_ERR_EFAULT:
return("Bad address");
case XVFS_RV_ERR_INTERNAL:
return("Internal error");
default:
return("Unknown error");
}
}
#endif
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if (mode & O_WRONLY) {
return(NULL);
}
return(xvfs_tclfs_openChannel(Tcl_NewStringObj(pathStr, -1), instanceInfo));
}
static int xvfs_tclfs_verifyType(Tcl_Obj *path, Tcl_GlobTypeData *types, struct xvfs_tclfs_instance_info *instanceInfo) {
const char *pathStr;
Tcl_StatBuf fileInfo;
int statRetVal;
statRetVal = xvfs_tclfs_stat(path, &fileInfo, instanceInfo);
if (statRetVal != 0) {
return(0);
}
if (!types) {
return(1);
}
if (types->perm != TCL_GLOB_PERM_RONLY) {
if (types->perm & (TCL_GLOB_PERM_W | TCL_GLOB_PERM_X | TCL_GLOB_PERM_HIDDEN)) {
return(0);
}
}
if (types->type & (TCL_GLOB_TYPE_BLOCK | TCL_GLOB_TYPE_CHAR | TCL_GLOB_TYPE_PIPE | TCL_GLOB_TYPE_SOCK | TCL_GLOB_TYPE_LINK)) {
return(0);
}
if ((types->type & TCL_GLOB_TYPE_DIR) == TCL_GLOB_TYPE_DIR) {
if (!(fileInfo.st_mode & 040000)) {
return(0);
}
}
if ((types->type & TCL_GLOB_TYPE_FILE) == TCL_GLOB_TYPE_FILE) {
if (!(fileInfo.st_mode & 0100000)) {
return(0);
}
}
if ((types->type & TCL_GLOB_TYPE_MOUNT) == TCL_GLOB_TYPE_MOUNT) {
pathStr = xvfs_relativePath(path, instanceInfo);
if (!pathStr) {
return(0);
}
if (strlen(pathStr) != 0) {
return(0);
}
}
return(1);
}
static int xvfs_tclfs_matchInDir(Tcl_Interp *interp, Tcl_Obj *resultPtr, Tcl_Obj *path, const char *pattern, Tcl_GlobTypeData *types, struct xvfs_tclfs_instance_info *instanceInfo) {
const char *pathStr;
const char **children, *child;
Tcl_WideInt childrenCount, idx;
Tcl_Obj *childObj;
int tclRetVal;
if (pattern == NULL) {
if (xvfs_tclfs_verifyType(path, types, instanceInfo)) {
return(TCL_OK);
}
return(TCL_ERROR);
}
pathStr = xvfs_relativePath(path, instanceInfo);
if (!pathStr) {
if (interp) {
Tcl_SetResult(interp, (char *) xvfs_perror(XVFS_RV_ERR_ENOENT), NULL);
}
return(TCL_ERROR);
}
childrenCount = 0;
children = instanceInfo->fsInfo->getChildrenProc(pathStr, &childrenCount);
if (childrenCount < 0) {
if (interp) {
Tcl_SetResult(interp, (char *) xvfs_perror(childrenCount), NULL);
}
return(TCL_ERROR);
}
for (idx = 0; idx < childrenCount; idx++) {
child = children[idx];
if (!Tcl_StringMatch(child, pattern)) {
continue;
}
childObj = Tcl_DuplicateObj(path);
Tcl_AppendStringsToObj(childObj, "/", child, NULL);
Tcl_IncrRefCount(childObj);
if (!xvfs_tclfs_verifyType(childObj, types, instanceInfo)) {
Tcl_DecrRefCount(childObj);
continue;
}
tclRetVal = Tcl_ListObjAppendElement(interp, resultPtr, childObj);
Tcl_DecrRefCount(childObj);
if (tclRetVal != TCL_OK) {
return(tclRetVal);
}
}
return(TCL_OK);
}
#endif /* XVFS_MODE_SERVER || XVFS_MODE_STANDALONE || XVFS_MODE_FLEIXBLE */
#if defined(XVFS_MODE_STANDALONE) || defined(XVFS_MODE_FLEXIBLE)
/*
* Tcl_Filesystem handlers for the standalone implementation
*/
static struct xvfs_tclfs_instance_info xvfs_tclfs_standalone_info;
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static Tcl_Obj *xvfs_tclfs_standalone_listVolumes(void) {
return(xvfs_tclfs_listVolumes(&xvfs_tclfs_standalone_info));
}
static Tcl_Channel xvfs_tclfs_standalone_openFileChannel(Tcl_Interp *interp, Tcl_Obj *path, int mode, int permissions) {
return(xvfs_tclfs_openFileChannel(interp, path, mode, permissions, &xvfs_tclfs_standalone_info));
}
static int xvfs_tclfs_standalone_matchInDir(Tcl_Interp *interp, Tcl_Obj *resultPtr, Tcl_Obj *pathPtr, const char *pattern, Tcl_GlobTypeData *types) {
return(xvfs_tclfs_matchInDir(interp, resultPtr, pathPtr, pattern, types, &xvfs_tclfs_standalone_info));
}
/*
* There are three (3) modes of operation for Xvfs_Register:
* 1. standalone -- We register our own Tcl_Filesystem
* and handle requests under `//xvfs:/<fsName>`
* 2. client -- A single Tcl_Filesystem is registered for the
* interp to handle requests under `//xvfs:/` which
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xvfs_tclfs_standalone_fs.createInternalRepProc = NULL;
xvfs_tclfs_standalone_fs.normalizePathProc = NULL;
xvfs_tclfs_standalone_fs.filesystemPathTypeProc = NULL;
xvfs_tclfs_standalone_fs.filesystemSeparatorProc = NULL;
xvfs_tclfs_standalone_fs.statProc = xvfs_tclfs_standalone_stat;
xvfs_tclfs_standalone_fs.accessProc = NULL;
xvfs_tclfs_standalone_fs.openFileChannelProc = xvfs_tclfs_standalone_openFileChannel;
xvfs_tclfs_standalone_fs.matchInDirectoryProc = NULL; /* XXX:TODO */
xvfs_tclfs_standalone_fs.matchInDirectoryProc = xvfs_tclfs_standalone_matchInDir;
xvfs_tclfs_standalone_fs.utimeProc = NULL;
xvfs_tclfs_standalone_fs.linkProc = NULL;
xvfs_tclfs_standalone_fs.listVolumesProc = xvfs_tclfs_standalone_listVolumes;
xvfs_tclfs_standalone_fs.fileAttrStringsProc = NULL;
xvfs_tclfs_standalone_fs.fileAttrsGetProc = NULL;
xvfs_tclfs_standalone_fs.fileAttrsSetProc = NULL;
xvfs_tclfs_standalone_fs.createDirectoryProc = NULL;
|