09e53d3c38 2019-09-20 1: <?
ae8437b96b 2019-12-01 2: # Care must be taken when editing this file as
ae8437b96b 2019-12-01 3: # it may be processed by either "xvfs-create"
ae8437b96b 2019-12-01 4: # which uses a full Tcl and Rivet parser
ae8437b96b 2019-12-01 5: # or by "xvfs-create-c" which uses a much
ae8437b96b 2019-12-01 6: # simpler one that only knows about printable
ae8437b96b 2019-12-01 7: # sections and ignores all Tcl sections
ae8437b96b 2019-12-01 8:
09e53d3c38 2019-09-20 9: if {[info exists ::xvfs::xvfsCoreH]} {
ae8437b96b 2019-12-01 10: ::minirivet::_emitOutput $::xvfs::xvfsCoreH
09e53d3c38 2019-09-20 11: } else {
09e53d3c38 2019-09-20 12: ?>#include <xvfs-core.h><? } ?>
2b7fa3a8fa 2019-09-20 13: #include <sys/stat.h>
2b7fa3a8fa 2019-09-20 14: #include <unistd.h>
2b7fa3a8fa 2019-09-20 15: #include <string.h>
2b7fa3a8fa 2019-09-20 16: #include <tcl.h>
2b7fa3a8fa 2019-09-20 17:
2b7fa3a8fa 2019-09-20 18: #define XVFS_NAME_LOOKUP_ERROR (-1)
2b7fa3a8fa 2019-09-20 19: #define XVFS_FILE_BLOCKSIZE 1024
2b7fa3a8fa 2019-09-20 20:
2b7fa3a8fa 2019-09-20 21: /*
2b7fa3a8fa 2019-09-20 22: * XXX:TODO: Determine this automatically rather than
2b7fa3a8fa 2019-09-20 23: * by heuristics
2b7fa3a8fa 2019-09-20 24: */
2b7fa3a8fa 2019-09-20 25: #define HAVE_STRUCT_STAT_ST_BLKSIZE 1
2b7fa3a8fa 2019-09-20 26: #define HAVE_STRUCT_STAT_ST_BLOCKS 1
2b7fa3a8fa 2019-09-20 27: #ifdef WIN32
2b7fa3a8fa 2019-09-20 28: # undef HAVE_STRUCT_STAT_ST_BLKSIZE
2b7fa3a8fa 2019-09-20 29: # undef HAVE_STRUCT_STAT_ST_BLOCKS
2b7fa3a8fa 2019-09-20 30: #endif
2b7fa3a8fa 2019-09-20 31:
c57d8bead8 2019-09-20 32: #ifndef MIN
2b7fa3a8fa 2019-09-20 33: #define MIN(a, b) (((a) < (b)) ? (a) : (b))
c57d8bead8 2019-09-20 34: #endif
2b7fa3a8fa 2019-09-20 35:
c57d8bead8 2019-09-20 36: #ifndef HAVE_DEFINED_XVFS_FILE_TYPE_T
c57d8bead8 2019-09-20 37: #define HAVE_DEFINED_XVFS_FILE_TYPE_T 1
2b7fa3a8fa 2019-09-20 38: typedef enum {
2b7fa3a8fa 2019-09-20 39: XVFS_FILE_TYPE_REG,
2b7fa3a8fa 2019-09-20 40: XVFS_FILE_TYPE_DIR
2b7fa3a8fa 2019-09-20 41: } xvfs_file_type_t;
c57d8bead8 2019-09-20 42: #endif
2b7fa3a8fa 2019-09-20 43:
c57d8bead8 2019-09-20 44: #ifndef HAVE_DEFINED_XVFS_SIZE_T
c57d8bead8 2019-09-20 45: #define HAVE_DEFINED_XVFS_SIZE_T 1
2b7fa3a8fa 2019-09-20 46: typedef Tcl_WideInt xvfs_size_t;
c57d8bead8 2019-09-20 47: #endif
2b7fa3a8fa 2019-09-20 48:
c57d8bead8 2019-09-20 49: #ifndef HAVE_DEFINED_XVFS_FILE_DATA
c57d8bead8 2019-09-20 50: #define HAVE_DEFINED_XVFS_FILE_DATA 1
2b7fa3a8fa 2019-09-20 51: struct xvfs_file_data {
a719156faf 2019-10-09 52: const char * const name;
a719156faf 2019-10-09 53: const xvfs_file_type_t type;
a719156faf 2019-10-09 54: const xvfs_size_t size;
2b7fa3a8fa 2019-09-20 55: union {
a719156faf 2019-10-09 56: const unsigned char * const fileContents;
2b7fa3a8fa 2019-09-20 57: const char **dirChildren;
2b7fa3a8fa 2019-09-20 58: } data;
2b7fa3a8fa 2019-09-20 59: };
c57d8bead8 2019-09-20 60: #endif
2b7fa3a8fa 2019-09-20 61:
2b7fa3a8fa 2019-09-20 62: <?
2b7fa3a8fa 2019-09-20 63: package require xvfs
2b7fa3a8fa 2019-09-20 64:
ae8437b96b 2019-12-01 65: set ::xvfs::fileInfoStruct [xvfs::main $::xvfs::argv]
ae8437b96b 2019-12-01 66: ?><?= $::xvfs::fileInfoStruct ?>
2b7fa3a8fa 2019-09-20 67: static long xvfs_<?= $::xvfs::fsName ?>_nameToIndex(const char *path) {
37d00c3cfb 2019-11-04 68: <?
0ffa676110 2019-12-02 69: set hashTable [::xvfs::generateHashTable pathIndex path pathLen XVFS_NAME_LOOKUP_ERROR $::xvfs::outputFiles prefix "\t" hashTableSize 30 validate "strcmp(path, xvfs_${::xvfs::fsName}_data\[pathIndex\].name) == 0" onValidated "return(pathIndex);"]
0ffa676110 2019-12-02 70: set hashTableHeader [dict get $hashTable header]
0ffa676110 2019-12-02 71: ?><?= $hashTableHeader ?>
0ffa676110 2019-12-02 72: long pathIndex;
a719156faf 2019-10-09 73: ssize_t pathLen;
a719156faf 2019-10-09 74:
2b7fa3a8fa 2019-09-20 75: if (path == NULL) {
2b7fa3a8fa 2019-09-20 76: return(XVFS_NAME_LOOKUP_ERROR);
2b7fa3a8fa 2019-09-20 77: }
2b7fa3a8fa 2019-09-20 78:
2b7fa3a8fa 2019-09-20 79: pathLen = strlen(path);
a719156faf 2019-10-09 80:
0ffa676110 2019-12-02 81: <?= [dict get $hashTable body] ?>
0ffa676110 2019-12-02 82:
2b7fa3a8fa 2019-09-20 83: return(XVFS_NAME_LOOKUP_ERROR);
2b7fa3a8fa 2019-09-20 84: }
2b7fa3a8fa 2019-09-20 85:
2b7fa3a8fa 2019-09-20 86: static const char **xvfs_<?= $::xvfs::fsName ?>_getChildren(const char *path, Tcl_WideInt *count) {
2b7fa3a8fa 2019-09-20 87: const struct xvfs_file_data *fileInfo;
2b7fa3a8fa 2019-09-20 88: long inode;
2b7fa3a8fa 2019-09-20 89:
2b7fa3a8fa 2019-09-20 90: /*
2b7fa3a8fa 2019-09-20 91: * Validate input parameters
2b7fa3a8fa 2019-09-20 92: */
2b7fa3a8fa 2019-09-20 93: if (count == NULL) {
2b7fa3a8fa 2019-09-20 94: return(NULL);
2b7fa3a8fa 2019-09-20 95: }
2b7fa3a8fa 2019-09-20 96:
2b7fa3a8fa 2019-09-20 97: /*
2b7fa3a8fa 2019-09-20 98: * Get the inode from the lookup function
2b7fa3a8fa 2019-09-20 99: */
2b7fa3a8fa 2019-09-20 100: inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
2b7fa3a8fa 2019-09-20 101: if (inode == XVFS_NAME_LOOKUP_ERROR) {
2b7fa3a8fa 2019-09-20 102: *count = XVFS_RV_ERR_ENOENT;
2b7fa3a8fa 2019-09-20 103: return(NULL);
2b7fa3a8fa 2019-09-20 104: }
2b7fa3a8fa 2019-09-20 105:
2b7fa3a8fa 2019-09-20 106: fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];
2b7fa3a8fa 2019-09-20 107:
2b7fa3a8fa 2019-09-20 108: /*
2b7fa3a8fa 2019-09-20 109: * Ensure this is a directory
2b7fa3a8fa 2019-09-20 110: */
2b7fa3a8fa 2019-09-20 111: if (fileInfo->type != XVFS_FILE_TYPE_DIR) {
2b7fa3a8fa 2019-09-20 112: *count = XVFS_RV_ERR_ENOTDIR;
2b7fa3a8fa 2019-09-20 113: return(NULL);
2b7fa3a8fa 2019-09-20 114: }
2b7fa3a8fa 2019-09-20 115:
2b7fa3a8fa 2019-09-20 116: *count = fileInfo->size;
2b7fa3a8fa 2019-09-20 117: return(fileInfo->data.dirChildren);
2b7fa3a8fa 2019-09-20 118: }
2b7fa3a8fa 2019-09-20 119:
2b7fa3a8fa 2019-09-20 120: static const unsigned char *xvfs_<?= $::xvfs::fsName ?>_getData(const char *path, Tcl_WideInt start, Tcl_WideInt *length) {
2b7fa3a8fa 2019-09-20 121: const struct xvfs_file_data *fileInfo;
2b7fa3a8fa 2019-09-20 122: Tcl_WideInt resultLength;
2b7fa3a8fa 2019-09-20 123: long inode;
2b7fa3a8fa 2019-09-20 124:
2b7fa3a8fa 2019-09-20 125: /*
2b7fa3a8fa 2019-09-20 126: * Validate input parameters
2b7fa3a8fa 2019-09-20 127: */
2b7fa3a8fa 2019-09-20 128: if (length == NULL) {
2b7fa3a8fa 2019-09-20 129: return(NULL);
2b7fa3a8fa 2019-09-20 130: }
2b7fa3a8fa 2019-09-20 131:
2b7fa3a8fa 2019-09-20 132: if (start < 0) {
2b7fa3a8fa 2019-09-20 133: *length = XVFS_RV_ERR_EINVAL;
2b7fa3a8fa 2019-09-20 134: return(NULL);
2b7fa3a8fa 2019-09-20 135: }
2b7fa3a8fa 2019-09-20 136:
2b7fa3a8fa 2019-09-20 137: if (*length < 0) {
2b7fa3a8fa 2019-09-20 138: *length = XVFS_RV_ERR_EINVAL;
2b7fa3a8fa 2019-09-20 139: return(NULL);
2b7fa3a8fa 2019-09-20 140: }
2b7fa3a8fa 2019-09-20 141:
2b7fa3a8fa 2019-09-20 142: /*
2b7fa3a8fa 2019-09-20 143: * Get the inode from the lookup function
2b7fa3a8fa 2019-09-20 144: */
2b7fa3a8fa 2019-09-20 145: inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
2b7fa3a8fa 2019-09-20 146: if (inode == XVFS_NAME_LOOKUP_ERROR) {
2b7fa3a8fa 2019-09-20 147: *length = XVFS_RV_ERR_ENOENT;
2b7fa3a8fa 2019-09-20 148: return(NULL);
2b7fa3a8fa 2019-09-20 149: }
2b7fa3a8fa 2019-09-20 150:
2b7fa3a8fa 2019-09-20 151: fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];
2b7fa3a8fa 2019-09-20 152:
2b7fa3a8fa 2019-09-20 153: /*
2b7fa3a8fa 2019-09-20 154: * Ensure this is a file that can be read
2b7fa3a8fa 2019-09-20 155: */
2b7fa3a8fa 2019-09-20 156: if (fileInfo->type != XVFS_FILE_TYPE_REG) {
2b7fa3a8fa 2019-09-20 157: *length = XVFS_RV_ERR_EISDIR;
2b7fa3a8fa 2019-09-20 158: return(NULL);
2b7fa3a8fa 2019-09-20 159: }
2b7fa3a8fa 2019-09-20 160:
2b7fa3a8fa 2019-09-20 161: /*
2b7fa3a8fa 2019-09-20 162: * Validate the length
2b7fa3a8fa 2019-09-20 163: */
2b7fa3a8fa 2019-09-20 164: if (start > fileInfo->size) {
2b7fa3a8fa 2019-09-20 165: *length = XVFS_RV_ERR_EFAULT;
2b7fa3a8fa 2019-09-20 166: return(NULL);
2b7fa3a8fa 2019-09-20 167: }
2b7fa3a8fa 2019-09-20 168:
2b7fa3a8fa 2019-09-20 169: if (*length == 0) {
2b7fa3a8fa 2019-09-20 170: resultLength = fileInfo->size - start;
2b7fa3a8fa 2019-09-20 171: } else {
2b7fa3a8fa 2019-09-20 172: resultLength = MIN(fileInfo->size - start, *length);
2b7fa3a8fa 2019-09-20 173: }
2b7fa3a8fa 2019-09-20 174: *length = resultLength;
2b7fa3a8fa 2019-09-20 175:
2b7fa3a8fa 2019-09-20 176: /*
2b7fa3a8fa 2019-09-20 177: * Return the data
2b7fa3a8fa 2019-09-20 178: */
2b7fa3a8fa 2019-09-20 179: return(fileInfo->data.fileContents + start);
2b7fa3a8fa 2019-09-20 180: }
2b7fa3a8fa 2019-09-20 181:
2b7fa3a8fa 2019-09-20 182: static int xvfs_<?= $::xvfs::fsName ?>_getStat(const char *path, Tcl_StatBuf *statBuf) {
2b7fa3a8fa 2019-09-20 183: const struct xvfs_file_data *fileInfo;
2b7fa3a8fa 2019-09-20 184: long inode;
2b7fa3a8fa 2019-09-20 185:
2b7fa3a8fa 2019-09-20 186: /*
2b7fa3a8fa 2019-09-20 187: * Validate input parameters
2b7fa3a8fa 2019-09-20 188: */
2b7fa3a8fa 2019-09-20 189: if (!statBuf) {
2b7fa3a8fa 2019-09-20 190: return(XVFS_RV_ERR_EINVAL);
2b7fa3a8fa 2019-09-20 191: }
2b7fa3a8fa 2019-09-20 192:
2b7fa3a8fa 2019-09-20 193: /*
2b7fa3a8fa 2019-09-20 194: * Get the inode from the lookup function
2b7fa3a8fa 2019-09-20 195: */
2b7fa3a8fa 2019-09-20 196: inode = xvfs_<?= $::xvfs::fsName ?>_nameToIndex(path);
2b7fa3a8fa 2019-09-20 197: if (inode == XVFS_NAME_LOOKUP_ERROR) {
2b7fa3a8fa 2019-09-20 198: return(XVFS_RV_ERR_ENOENT);
2b7fa3a8fa 2019-09-20 199: }
2b7fa3a8fa 2019-09-20 200:
2b7fa3a8fa 2019-09-20 201: fileInfo = &xvfs_<?= $::xvfs::fsName ?>_data[inode];
2b7fa3a8fa 2019-09-20 202:
0ffa676110 2019-12-02 203: statBuf->st_dev = <?= [zlib adler32 $::xvfs::fsName 0] ?>;
0ffa676110 2019-12-02 204: statBuf->st_rdev = <?= [zlib adler32 $::xvfs::fsName 0] ?>;
2b7fa3a8fa 2019-09-20 205: statBuf->st_ino = inode;
2b7fa3a8fa 2019-09-20 206: statBuf->st_uid = 0;
2b7fa3a8fa 2019-09-20 207: statBuf->st_gid = 0;
2b7fa3a8fa 2019-09-20 208: statBuf->st_atime = 0;
2b7fa3a8fa 2019-09-20 209: statBuf->st_ctime = 0;
2b7fa3a8fa 2019-09-20 210: statBuf->st_mtime = 0;
2b7fa3a8fa 2019-09-20 211: #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
2b7fa3a8fa 2019-09-20 212: statBuf->st_blksize = XVFS_FILE_BLOCKSIZE;
2b7fa3a8fa 2019-09-20 213: #endif
2b7fa3a8fa 2019-09-20 214:
2b7fa3a8fa 2019-09-20 215: if (fileInfo->type == XVFS_FILE_TYPE_REG) {
2b7fa3a8fa 2019-09-20 216: statBuf->st_mode = 0100444;
2b7fa3a8fa 2019-09-20 217: statBuf->st_nlink = 1;
2b7fa3a8fa 2019-09-20 218: statBuf->st_size = fileInfo->size;
2b7fa3a8fa 2019-09-20 219: #ifdef HAVE_STRUCT_STAT_ST_BLOCKS
2b7fa3a8fa 2019-09-20 220: statBuf->st_blocks = (fileInfo->size + statBuf->st_blksize - 1) / statBuf->st_blksize;
2b7fa3a8fa 2019-09-20 221: #endif
2b7fa3a8fa 2019-09-20 222: } else if (fileInfo->type == XVFS_FILE_TYPE_DIR) {
2b7fa3a8fa 2019-09-20 223: statBuf->st_mode = 040555;
2b7fa3a8fa 2019-09-20 224: statBuf->st_nlink = fileInfo->size;
2b7fa3a8fa 2019-09-20 225: statBuf->st_size = fileInfo->size;
2b7fa3a8fa 2019-09-20 226: #ifdef HAVE_STRUCT_STAT_ST_BLOCKS
2b7fa3a8fa 2019-09-20 227: statBuf->st_blocks = 1;
2b7fa3a8fa 2019-09-20 228: #endif
2b7fa3a8fa 2019-09-20 229: }
2b7fa3a8fa 2019-09-20 230:
2b7fa3a8fa 2019-09-20 231: return(0);
2b7fa3a8fa 2019-09-20 232: }
2b7fa3a8fa 2019-09-20 233:
2b7fa3a8fa 2019-09-20 234: static struct Xvfs_FSInfo xvfs_<?= $::xvfs::fsName ?>_fsInfo = {
2b7fa3a8fa 2019-09-20 235: .protocolVersion = XVFS_PROTOCOL_VERSION,
2b7fa3a8fa 2019-09-20 236: .name = "<?= $::xvfs::fsName ?>",
2b7fa3a8fa 2019-09-20 237: .getChildrenProc = xvfs_<?= $::xvfs::fsName ?>_getChildren,
2b7fa3a8fa 2019-09-20 238: .getDataProc = xvfs_<?= $::xvfs::fsName ?>_getData,
2b7fa3a8fa 2019-09-20 239: .getStatProc = xvfs_<?= $::xvfs::fsName ?>_getStat
2b7fa3a8fa 2019-09-20 240: };
2b7fa3a8fa 2019-09-20 241:
2b7fa3a8fa 2019-09-20 242: int Xvfs_<?= $::xvfs::fsName ?>_Init(Tcl_Interp *interp) {
2b7fa3a8fa 2019-09-20 243: int register_ret;
2b7fa3a8fa 2019-09-20 244:
2b7fa3a8fa 2019-09-20 245: #ifdef USE_TCL_STUBS
2b7fa3a8fa 2019-09-20 246: const char *tclInitStubs_ret;
2b7fa3a8fa 2019-09-20 247: /* Initialize Stubs */
2b7fa3a8fa 2019-09-20 248: tclInitStubs_ret = Tcl_InitStubs(interp, TCL_PATCH_LEVEL, 0);
2b7fa3a8fa 2019-09-20 249: if (!tclInitStubs_ret) {
2b7fa3a8fa 2019-09-20 250: return(TCL_ERROR);
2b7fa3a8fa 2019-09-20 251: }
2b7fa3a8fa 2019-09-20 252: #endif
2b7fa3a8fa 2019-09-20 253:
2b7fa3a8fa 2019-09-20 254: register_ret = Xvfs_Register(interp, &xvfs_<?= $::xvfs::fsName ?>_fsInfo);
2b7fa3a8fa 2019-09-20 255: if (register_ret != TCL_OK) {
2b7fa3a8fa 2019-09-20 256: return(register_ret);
2b7fa3a8fa 2019-09-20 257: }
2b7fa3a8fa 2019-09-20 258:
2b7fa3a8fa 2019-09-20 259: return(TCL_OK);
2b7fa3a8fa 2019-09-20 260: }
2b7fa3a8fa 2019-09-20 261: #undef XVFS_NAME_LOOKUP_ERROR
2b7fa3a8fa 2019-09-20 262: #undef XVFS_FILE_BLOCKSIZE