69e476dcd5 2019-05-02 1: #include <xvfs-core.h>
d121970301 2019-05-02 2: #include <string.h>
69e476dcd5 2019-05-02 3: #include <tcl.h>
e5b6962adf 2019-05-02 4:
3e44e1def1 2019-05-02 5: #if defined(XVFS_MODE_SERVER) || defined(XVFS_MODE_STANDALONE) || defined(XVFS_MODE_FLEXIBLE)
d121970301 2019-05-02 6: #define XVFS_ROOT_MOUNTPOINT "//xvfs:/"
d121970301 2019-05-02 7:
d121970301 2019-05-02 8: struct xvfs_tclfs_instance_info {
d121970301 2019-05-02 9: struct Xvfs_FSInfo *fsInfo;
d121970301 2019-05-02 10: Tcl_Obj *mountpoint;
d121970301 2019-05-02 11: };
d121970301 2019-05-02 12:
d121970301 2019-05-02 13: /*
d121970301 2019-05-02 14: * Internal Core Utilities
d121970301 2019-05-02 15: */
d121970301 2019-05-02 16: static const char *xvfs_relativePath(Tcl_Obj *path, struct xvfs_tclfs_instance_info *info) {
d121970301 2019-05-02 17: const char *pathStr, *rootStr;
d121970301 2019-05-02 18: int pathLen, rootLen;
d121970301 2019-05-02 19:
d121970301 2019-05-02 20: pathStr = Tcl_GetStringFromObj(path, &pathLen);
d121970301 2019-05-02 21: rootStr = Tcl_GetStringFromObj(info->mountpoint, &rootLen);
d121970301 2019-05-02 22:
d121970301 2019-05-02 23: if (pathLen < rootLen) {
d121970301 2019-05-02 24: return(NULL);
d121970301 2019-05-02 25: }
d121970301 2019-05-02 26:
d121970301 2019-05-02 27: if (memcmp(pathStr, rootStr, rootLen) != 0) {
d121970301 2019-05-02 28: return(NULL);
d121970301 2019-05-02 29: }
d121970301 2019-05-02 30:
d121970301 2019-05-02 31: if (pathLen == rootLen) {
d121970301 2019-05-02 32: return("");
d121970301 2019-05-02 33: }
d121970301 2019-05-02 34:
d121970301 2019-05-02 35: /* XXX:TODO: Should this use the native OS path separator ? */
d121970301 2019-05-02 36: if (pathStr[rootLen] != '/') {
d121970301 2019-05-02 37: return(NULL);
d121970301 2019-05-02 38: }
d121970301 2019-05-02 39:
d121970301 2019-05-02 40: return(pathStr + rootLen + 1);
d121970301 2019-05-02 41: }
d121970301 2019-05-02 42:
d121970301 2019-05-02 43: /*
d121970301 2019-05-02 44: * Internal Tcl_Filesystem functions, with the appropriate instance info
d121970301 2019-05-02 45: */
d121970301 2019-05-02 46: static int xvfs_tclfs_pathInFilesystem(Tcl_Obj *path, ClientData *dataPtr, struct xvfs_tclfs_instance_info *instanceInfo) {
d121970301 2019-05-02 47: const char *relativePath;
d121970301 2019-05-02 48:
d121970301 2019-05-02 49: relativePath = xvfs_relativePath(path, instanceInfo);
d121970301 2019-05-02 50: if (!relativePath) {
d121970301 2019-05-02 51: return(-1);
d121970301 2019-05-02 52: }
d121970301 2019-05-02 53:
d121970301 2019-05-02 54: return(TCL_OK);
d121970301 2019-05-02 55: }
d121970301 2019-05-02 56:
d121970301 2019-05-02 57: static int xvfs_tclfs_stat(Tcl_Obj *path, Tcl_StatBuf *statBuf, struct xvfs_tclfs_instance_info *instanceInfo) {
d121970301 2019-05-02 58: const char *pathStr;
d121970301 2019-05-02 59: int retval;
d121970301 2019-05-02 60:
d121970301 2019-05-02 61: pathStr = xvfs_relativePath(path, instanceInfo);
d121970301 2019-05-02 62:
d121970301 2019-05-02 63: retval = instanceInfo->fsInfo->getInfoProc(pathStr, statBuf);
d121970301 2019-05-02 64:
d121970301 2019-05-02 65: return(retval);
d121970301 2019-05-02 66: }
d121970301 2019-05-02 67:
d121970301 2019-05-02 68: static Tcl_Obj *xvfs_tclfs_listVolumes(struct xvfs_tclfs_instance_info *instanceInfo) {
d121970301 2019-05-02 69: return(NULL);
d121970301 2019-05-02 70: }
d121970301 2019-05-02 71:
d121970301 2019-05-02 72: static Tcl_Channel xvfs_tclfs_openFileChannel(Tcl_Interp *interp, Tcl_Obj *path, int mode, int permissions, struct xvfs_tclfs_instance_info *instanceInfo) {
d121970301 2019-05-02 73: const char *pathStr;
d121970301 2019-05-02 74:
d121970301 2019-05-02 75: pathStr = xvfs_relativePath(path, instanceInfo);
d121970301 2019-05-02 76: fprintf(stderr, "Called open(%s)!\n", pathStr);
d121970301 2019-05-02 77:
d121970301 2019-05-02 78: return(NULL);
d121970301 2019-05-02 79: }
3e44e1def1 2019-05-02 80: #endif /* XVFS_MODE_SERVER || XVFS_MODE_STANDALONE || XVFS_MODE_FLEIXBLE */
d121970301 2019-05-02 81:
3e44e1def1 2019-05-02 82: #if defined(XVFS_MODE_STANDALONE)
d121970301 2019-05-02 83: /*
d121970301 2019-05-02 84: * Tcl_Filesystem handlers for the standalone implementation
d121970301 2019-05-02 85: */
acfc5037c6 2019-05-02 86: static struct xvfs_tclfs_instance_info xvfs_tclfs_standalone_info;
d121970301 2019-05-02 87: static int xvfs_tclfs_standalone_pathInFilesystem(Tcl_Obj *path, ClientData *dataPtr) {
d121970301 2019-05-02 88: return(xvfs_tclfs_pathInFilesystem(path, dataPtr, &xvfs_tclfs_standalone_info));
d121970301 2019-05-02 89: }
d121970301 2019-05-02 90:
d121970301 2019-05-02 91: static int xvfs_tclfs_standalone_stat(Tcl_Obj *path, Tcl_StatBuf *statBuf) {
d121970301 2019-05-02 92: return(xvfs_tclfs_stat(path, statBuf, &xvfs_tclfs_standalone_info));
e5b6962adf 2019-05-02 93: }
e5b6962adf 2019-05-02 94:
d121970301 2019-05-02 95: static Tcl_Obj *xvfs_tclfs_standalone_listVolumes(void) {
d121970301 2019-05-02 96: return(xvfs_tclfs_listVolumes(&xvfs_tclfs_standalone_info));
e5b6962adf 2019-05-02 97: }
e5b6962adf 2019-05-02 98:
d121970301 2019-05-02 99: static Tcl_Channel xvfs_tclfs_standalone_openFileChannel(Tcl_Interp *interp, Tcl_Obj *path, int mode, int permissions) {
d121970301 2019-05-02 100: return(xvfs_tclfs_openFileChannel(interp, path, mode, permissions, &xvfs_tclfs_standalone_info));
e5b6962adf 2019-05-02 101: }
32b55a907b 2019-05-02 102:
32b55a907b 2019-05-02 103: /*
32b55a907b 2019-05-02 104: * There are three (3) modes of operation for Xvfs_Register:
32b55a907b 2019-05-02 105: * 1. standalone -- We register our own Tcl_Filesystem
32b55a907b 2019-05-02 106: * and handle requests under `//xvfs:/<fsName>`
32b55a907b 2019-05-02 107: * 2. client -- A single Tcl_Filesystem is registered for the
32b55a907b 2019-05-02 108: * interp to handle requests under `//xvfs:/` which
32b55a907b 2019-05-02 109: * then dispatches to the appropriate registered
32b55a907b 2019-05-02 110: * handler
32b55a907b 2019-05-02 111: * 3. flexible -- Attempts to find a core Xvfs instance for the
32b55a907b 2019-05-02 112: * process at runtime, if found do #2, otherwise
32b55a907b 2019-05-02 113: * fallback to #1
32b55a907b 2019-05-02 114: *
32b55a907b 2019-05-02 115: */
acfc5037c6 2019-05-02 116: int xvfs_standalone_register(Tcl_Interp *interp, struct Xvfs_FSInfo *fsInfo) {
d121970301 2019-05-02 117: Tcl_Filesystem *xvfs_tclfs_Info;
e5b6962adf 2019-05-02 118: int tcl_ret;
d121970301 2019-05-02 119: static int registered = 0;
e5b6962adf 2019-05-02 120:
d121970301 2019-05-02 121: /*
d121970301 2019-05-02 122: * Ensure this instance is not already registered
d121970301 2019-05-02 123: */
d121970301 2019-05-02 124: if (registered) {
d121970301 2019-05-02 125: return(TCL_OK);
d121970301 2019-05-02 126: }
d121970301 2019-05-02 127: registered = 1;
d121970301 2019-05-02 128:
e5b6962adf 2019-05-02 129: /*
e5b6962adf 2019-05-02 130: * In standalone mode, we only support the same protocol we are
e5b6962adf 2019-05-02 131: * compiling for.
e5b6962adf 2019-05-02 132: */
e5b6962adf 2019-05-02 133: if (fsInfo->protocolVersion != XVFS_PROTOCOL_VERSION) {
e5b6962adf 2019-05-02 134: if (interp) {
e5b6962adf 2019-05-02 135: Tcl_SetResult(interp, "Protocol mismatch", NULL);
e5b6962adf 2019-05-02 136: }
e5b6962adf 2019-05-02 137: return(TCL_ERROR);
e5b6962adf 2019-05-02 138: }
e5b6962adf 2019-05-02 139:
d121970301 2019-05-02 140: xvfs_tclfs_Info = (Tcl_Filesystem *) Tcl_AttemptAlloc(sizeof(*xvfs_tclfs_Info));
d121970301 2019-05-02 141: if (!xvfs_tclfs_Info) {
e5b6962adf 2019-05-02 142: if (interp) {
e5b6962adf 2019-05-02 143: Tcl_SetResult(interp, "Unable to allocate Tcl_Filesystem object", NULL);
e5b6962adf 2019-05-02 144: }
e5b6962adf 2019-05-02 145: return(TCL_ERROR);
e5b6962adf 2019-05-02 146: }
e5b6962adf 2019-05-02 147:
3e44e1def1 2019-05-02 148: xvfs_tclfs_Info->typeName = "xvfs";
d121970301 2019-05-02 149: xvfs_tclfs_Info->structureLength = sizeof(*xvfs_tclfs_Info);
d121970301 2019-05-02 150: xvfs_tclfs_Info->version = TCL_FILESYSTEM_VERSION_1;
d121970301 2019-05-02 151: xvfs_tclfs_Info->pathInFilesystemProc = xvfs_tclfs_standalone_pathInFilesystem;
d121970301 2019-05-02 152: xvfs_tclfs_Info->dupInternalRepProc = NULL;
d121970301 2019-05-02 153: xvfs_tclfs_Info->freeInternalRepProc = NULL;
d121970301 2019-05-02 154: xvfs_tclfs_Info->internalToNormalizedProc = NULL;
d121970301 2019-05-02 155: xvfs_tclfs_Info->createInternalRepProc = NULL;
d121970301 2019-05-02 156: xvfs_tclfs_Info->normalizePathProc = NULL;
d121970301 2019-05-02 157: xvfs_tclfs_Info->filesystemPathTypeProc = NULL;
d121970301 2019-05-02 158: xvfs_tclfs_Info->filesystemSeparatorProc = NULL;
d121970301 2019-05-02 159: xvfs_tclfs_Info->statProc = xvfs_tclfs_standalone_stat;
d121970301 2019-05-02 160: xvfs_tclfs_Info->accessProc = NULL;
d121970301 2019-05-02 161: xvfs_tclfs_Info->openFileChannelProc = xvfs_tclfs_standalone_openFileChannel;
d121970301 2019-05-02 162: xvfs_tclfs_Info->matchInDirectoryProc = NULL;
d121970301 2019-05-02 163: xvfs_tclfs_Info->utimeProc = NULL;
d121970301 2019-05-02 164: xvfs_tclfs_Info->linkProc = NULL;
d121970301 2019-05-02 165: xvfs_tclfs_Info->listVolumesProc = xvfs_tclfs_standalone_listVolumes;
d121970301 2019-05-02 166: xvfs_tclfs_Info->fileAttrStringsProc = NULL;
d121970301 2019-05-02 167: xvfs_tclfs_Info->fileAttrsGetProc = NULL;
d121970301 2019-05-02 168: xvfs_tclfs_Info->fileAttrsSetProc = NULL;
d121970301 2019-05-02 169: xvfs_tclfs_Info->createDirectoryProc = NULL;
d121970301 2019-05-02 170: xvfs_tclfs_Info->removeDirectoryProc = NULL;
d121970301 2019-05-02 171: xvfs_tclfs_Info->deleteFileProc = NULL;
d121970301 2019-05-02 172: xvfs_tclfs_Info->copyFileProc = NULL;
d121970301 2019-05-02 173: xvfs_tclfs_Info->renameFileProc = NULL;
d121970301 2019-05-02 174: xvfs_tclfs_Info->copyDirectoryProc = NULL;
d121970301 2019-05-02 175: xvfs_tclfs_Info->lstatProc = NULL;
d121970301 2019-05-02 176: xvfs_tclfs_Info->loadFileProc = NULL;
d121970301 2019-05-02 177: xvfs_tclfs_Info->getCwdProc = NULL;
d121970301 2019-05-02 178: xvfs_tclfs_Info->chdirProc = NULL;
d121970301 2019-05-02 179:
d121970301 2019-05-02 180: xvfs_tclfs_standalone_info.fsInfo = fsInfo;
d121970301 2019-05-02 181: xvfs_tclfs_standalone_info.mountpoint = Tcl_NewObj();
d121970301 2019-05-02 182: Tcl_AppendStringsToObj(xvfs_tclfs_standalone_info.mountpoint, XVFS_ROOT_MOUNTPOINT, fsInfo->name, NULL);
d121970301 2019-05-02 183:
d121970301 2019-05-02 184: tcl_ret = Tcl_FSRegister(NULL, xvfs_tclfs_Info);
e5b6962adf 2019-05-02 185: if (tcl_ret != TCL_OK) {
e5b6962adf 2019-05-02 186: if (interp) {
e5b6962adf 2019-05-02 187: Tcl_SetResult(interp, "Tcl_FSRegister() failed", NULL);
e5b6962adf 2019-05-02 188: }
e5b6962adf 2019-05-02 189:
e5b6962adf 2019-05-02 190: return(tcl_ret);
e5b6962adf 2019-05-02 191: }
e5b6962adf 2019-05-02 192:
e5b6962adf 2019-05-02 193: return(TCL_OK);
e5b6962adf 2019-05-02 194: }
3e44e1def1 2019-05-02 195: #endif
3e44e1def1 2019-05-02 196:
3e44e1def1 2019-05-02 197: #if defined(XVFS_MODE_SERVER)
e5b6962adf 2019-05-02 198: int Xvfs_Register(Tcl_Interp *interp, struct Xvfs_FSInfo *fsInfo) {
acfc5037c6 2019-05-02 199: return(TCL_ERROR);
69e476dcd5 2019-05-02 200: }
acfc5037c6 2019-05-02 201: #endif