diff options
Diffstat (limited to 'generic/tclFCmd.c')
| -rw-r--r-- | generic/tclFCmd.c | 617 |
1 files changed, 495 insertions, 122 deletions
diff --git a/generic/tclFCmd.c b/generic/tclFCmd.c index da15262..fda2940 100644 --- a/generic/tclFCmd.c +++ b/generic/tclFCmd.c @@ -11,6 +11,7 @@ */ #include "tclInt.h" +#include "tclFileSystem.h" /* * Declarations for local functions defined in this file: @@ -21,9 +22,9 @@ static int CopyRenameOneFile(Tcl_Interp *interp, int copyFlag, int force); static Tcl_Obj * FileBasename(Tcl_Interp *interp, Tcl_Obj *pathPtr); static int FileCopyRename(Tcl_Interp *interp, - int objc, Tcl_Obj *CONST objv[], int copyFlag); + int objc, Tcl_Obj *const objv[], int copyFlag); static int FileForceOption(Tcl_Interp *interp, - int objc, Tcl_Obj *CONST objv[], int *forcePtr); + int objc, Tcl_Obj *const objv[], int *forcePtr); /* *--------------------------------------------------------------------------- @@ -46,10 +47,11 @@ static int FileForceOption(Tcl_Interp *interp, int TclFileRenameCmd( + ClientData clientData, /* Unused */ Tcl_Interp *interp, /* Interp for error reporting or recursive * calls in the case of a tricky rename. */ int objc, /* Number of arguments. */ - Tcl_Obj *CONST objv[]) /* Argument strings passed to Tcl_FileCmd. */ + Tcl_Obj *const objv[]) /* Argument strings passed to Tcl_FileCmd. */ { return FileCopyRename(interp, objc, objv, 0); } @@ -74,10 +76,11 @@ TclFileRenameCmd( int TclFileCopyCmd( + ClientData clientData, /* Unused */ Tcl_Interp *interp, /* Used for error reporting or recursive calls * in the case of a tricky copy. */ int objc, /* Number of arguments. */ - Tcl_Obj *CONST objv[]) /* Argument strings passed to Tcl_FileCmd. */ + Tcl_Obj *const objv[]) /* Argument strings passed to Tcl_FileCmd. */ { return FileCopyRename(interp, objc, objv, 1); } @@ -103,7 +106,7 @@ static int FileCopyRename( Tcl_Interp *interp, /* Used for error reporting. */ int objc, /* Number of arguments. */ - Tcl_Obj *CONST objv[], /* Argument strings passed to Tcl_FileCmd. */ + Tcl_Obj *const objv[], /* Argument strings passed to Tcl_FileCmd. */ int copyFlag) /* If non-zero, copy source(s). Otherwise, * rename them. */ { @@ -111,22 +114,20 @@ FileCopyRename( Tcl_StatBuf statBuf; Tcl_Obj *target; - i = FileForceOption(interp, objc - 2, objv + 2, &force); + i = FileForceOption(interp, objc - 1, objv + 1, &force); if (i < 0) { return TCL_ERROR; } - i += 2; + i++; if ((objc - i) < 2) { - Tcl_AppendResult(interp, "wrong # args: should be \"", - TclGetString(objv[0]), " ", TclGetString(objv[1]), - " ?options? source ?source ...? target\"", NULL); + Tcl_WrongNumArgs(interp, 1, objv, + "?-option value ...? source ?source ...? target"); return TCL_ERROR; } /* - * If target doesn't exist or isn't a directory, try the copy/rename. - * More than 2 arguments is only valid if the target is an existing - * directory. + * If target doesn't exist or isn't a directory, try the copy/rename. More + * than 2 arguments is only valid if the target is an existing directory. */ target = objv[objc - 1]; @@ -146,9 +147,9 @@ FileCopyRename( if ((objc - i) > 2) { errno = ENOTDIR; Tcl_PosixError(interp); - Tcl_AppendResult(interp, "error ", - (copyFlag ? "copying" : "renaming"), ": target \"", - TclGetString(target), "\" is not a directory", NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "error %s: target \"%s\" is not a directory", + (copyFlag?"copying":"renaming"), TclGetString(target))); result = TCL_ERROR; } else { /* @@ -171,7 +172,6 @@ FileCopyRename( for ( ; i<objc-1 ; i++) { Tcl_Obj *jargv[2]; Tcl_Obj *source, *newFileName; - Tcl_Obj *temp; source = FileBasename(interp, objv[i]); if (source == NULL) { @@ -180,13 +180,11 @@ FileCopyRename( } jargv[0] = objv[objc - 1]; jargv[1] = source; - temp = Tcl_NewListObj(2, jargv); - newFileName = Tcl_FSJoinPath(temp, -1); + newFileName = TclJoinPath(2, jargv); Tcl_IncrRefCount(newFileName); result = CopyRenameOneFile(interp, objv[i], newFileName, copyFlag, force); Tcl_DecrRefCount(newFileName); - Tcl_DecrRefCount(temp); Tcl_DecrRefCount(source); if (result == TCL_ERROR) { @@ -216,26 +214,25 @@ FileCopyRename( int TclFileMakeDirsCmd( + ClientData clientData, /* Unused */ Tcl_Interp *interp, /* Used for error reporting. */ int objc, /* Number of arguments */ - Tcl_Obj *CONST objv[]) /* Argument strings passed to Tcl_FileCmd. */ + Tcl_Obj *const objv[]) /* Argument strings passed to Tcl_FileCmd. */ { - Tcl_Obj *errfile; + Tcl_Obj *errfile = NULL; int result, i, j, pobjc; Tcl_Obj *split = NULL; Tcl_Obj *target = NULL; Tcl_StatBuf statBuf; - errfile = NULL; - result = TCL_OK; - for (i = 2; i < objc; i++) { + for (i = 1; i < objc; i++) { if (Tcl_FSConvertToPathType(interp, objv[i]) != TCL_OK) { result = TCL_ERROR; break; } - split = Tcl_FSSplitPath(objv[i],&pobjc); + split = Tcl_FSSplitPath(objv[i], &pobjc); Tcl_IncrRefCount(split); if (pobjc == 0) { errno = ENOENT; @@ -308,8 +305,9 @@ TclFileMakeDirsCmd( done: if (errfile != NULL) { - Tcl_AppendResult(interp, "can't create directory \"", - TclGetString(errfile), "\": ", Tcl_PosixError(interp), NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't create directory \"%s\": %s", + TclGetString(errfile), Tcl_PosixError(interp))); result = TCL_ERROR; } if (split != NULL) { @@ -340,30 +338,24 @@ TclFileMakeDirsCmd( int TclFileDeleteCmd( + ClientData clientData, /* Unused */ Tcl_Interp *interp, /* Used for error reporting */ int objc, /* Number of arguments */ - Tcl_Obj *CONST objv[]) /* Argument strings passed to Tcl_FileCmd. */ + Tcl_Obj *const objv[]) /* Argument strings passed to Tcl_FileCmd. */ { int i, force, result; Tcl_Obj *errfile; Tcl_Obj *errorBuffer = NULL; - i = FileForceOption(interp, objc - 2, objv + 2, &force); + i = FileForceOption(interp, objc - 1, objv + 1, &force); if (i < 0) { return TCL_ERROR; } - i += 2; - if ((objc - i) < 1) { - Tcl_AppendResult(interp, "wrong # args: should be \"", - TclGetString(objv[0]), " ", TclGetString(objv[1]), - " ?options? file ?file ...?\"", NULL); - return TCL_ERROR; - } errfile = NULL; result = TCL_OK; - for ( ; i < objc; i++) { + for (i++ ; i < objc; i++) { Tcl_StatBuf statBuf; errfile = objv[i]; @@ -387,9 +379,9 @@ TclFileDeleteCmd( result = Tcl_FSRemoveDirectory(objv[i], force, &errorBuffer); if (result != TCL_OK) { if ((force == 0) && (errno == EEXIST)) { - Tcl_AppendResult(interp, "error deleting \"", - TclGetString(objv[i]), "\": directory not empty", - NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "error deleting \"%s\": directory not empty", + TclGetString(objv[i]))); Tcl_PosixError(interp); goto done; } @@ -436,12 +428,13 @@ TclFileDeleteCmd( * We try to accomodate poor error results from our Tcl_FS calls. */ - Tcl_AppendResult(interp, "error deleting unknown file: ", - Tcl_PosixError(interp), NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "error deleting unknown file: %s", + Tcl_PosixError(interp))); } else { - Tcl_AppendResult(interp, "error deleting \"", - TclGetString(errfile), "\": ", Tcl_PosixError(interp), - NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "error deleting \"%s\": %s", + TclGetString(errfile), Tcl_PosixError(interp))); } } @@ -530,7 +523,7 @@ CopyRenameOneFile( * 16 bits and we get collisions. See bug #2015723. */ -#if !defined(WIN32) && !defined(__CYGWIN__) +#if !defined(_WIN32) && !defined(__CYGWIN__) if ((sourceStatBuf.st_ino != 0) && (targetStatBuf.st_ino != 0)) { if ((sourceStatBuf.st_ino == targetStatBuf.st_ino) && (sourceStatBuf.st_dev == targetStatBuf.st_dev)) { @@ -550,17 +543,17 @@ CopyRenameOneFile( if (S_ISDIR(sourceStatBuf.st_mode) && !S_ISDIR(targetStatBuf.st_mode)) { errno = EISDIR; - Tcl_AppendResult(interp, "can't overwrite file \"", - TclGetString(target), "\" with directory \"", - TclGetString(source), "\"", NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't overwrite file \"%s\" with directory \"%s\"", + TclGetString(target), TclGetString(source))); goto done; } if (!S_ISDIR(sourceStatBuf.st_mode) && S_ISDIR(targetStatBuf.st_mode)) { errno = EISDIR; - Tcl_AppendResult(interp, "can't overwrite directory \"", - TclGetString(target), "\" with file \"", - TclGetString(source), "\"", NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't overwrite directory \"%s\" with file \"%s\"", + TclGetString(target), TclGetString(source))); goto done; } @@ -591,10 +584,10 @@ CopyRenameOneFile( } if (errno == EINVAL) { - Tcl_AppendResult(interp, "error renaming \"", - TclGetString(source), "\" to \"", TclGetString(target), - "\": trying to rename a volume or " - "move a directory into itself", NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "error renaming \"%s\" to \"%s\": trying to rename a" + " volume or move a directory into itself", + TclGetString(source), TclGetString(target))); goto done; } else if (errno != EXDEV) { errfile = target; @@ -638,8 +631,9 @@ CopyRenameOneFile( * Actual file doesn't exist. */ - Tcl_AppendResult(interp, "error copying \"", TclGetString(source), - "\": the target of this link doesn't exist", NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "error copying \"%s\": the target of this link doesn't" + " exist", TclGetString(source))); goto done; } else { int counter = 0; @@ -759,6 +753,7 @@ CopyRenameOneFile( if (S_ISDIR(sourceStatBuf.st_mode)) { result = Tcl_FSRemoveDirectory(source, 1, &errorBuffer); if (result != TCL_OK) { + errfile = errorBuffer; if (Tcl_FSEqualPaths(errfile, source) == 0) { errfile = source; } @@ -770,23 +765,27 @@ CopyRenameOneFile( } } if (result != TCL_OK) { - Tcl_AppendResult(interp, "can't unlink \"", TclGetString(errfile), - "\": ", Tcl_PosixError(interp), NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf("can't unlink \"%s\": %s", + TclGetString(errfile), Tcl_PosixError(interp))); errfile = NULL; } } done: if (errfile != NULL) { - Tcl_AppendResult(interp, "error ", (copyFlag ? "copying" : "renaming"), - " \"", TclGetString(source), NULL); + Tcl_Obj *errorMsg = Tcl_ObjPrintf("error %s \"%s\"", + (copyFlag ? "copying" : "renaming"), TclGetString(source)); + if (errfile != source) { - Tcl_AppendResult(interp, "\" to \"", TclGetString(target), NULL); + Tcl_AppendPrintfToObj(errorMsg, " to \"%s\"", + TclGetString(target)); if (errfile != target) { - Tcl_AppendResult(interp, "\": \"", TclGetString(errfile),NULL); + Tcl_AppendPrintfToObj(errorMsg, ": \"%s\"", + TclGetString(errfile)); } } - Tcl_AppendResult(interp, "\": ", Tcl_PosixError(interp), NULL); + Tcl_AppendPrintfToObj(errorMsg, ": %s", Tcl_PosixError(interp)); + Tcl_SetObjResult(interp, errorMsg); } if (errorBuffer != NULL) { Tcl_DecrRefCount(errorBuffer); @@ -820,27 +819,30 @@ static int FileForceOption( Tcl_Interp *interp, /* Interp, for error return. */ int objc, /* Number of arguments. */ - Tcl_Obj *CONST objv[], /* Argument strings. First command line + Tcl_Obj *const objv[], /* Argument strings. First command line * option, if it exists, begins at 0. */ int *forcePtr) /* If the "-force" was specified, *forcePtr is * filled with 1, otherwise with 0. */ { - int force, i; + int force, i, idx; + static const char *const options[] = { + "-force", "--", NULL + }; force = 0; for (i = 0; i < objc; i++) { if (TclGetString(objv[i])[0] != '-') { break; } - if (strcmp(TclGetString(objv[i]), "-force") == 0) { + if (Tcl_GetIndexFromObj(interp, objv[i], options, "option", TCL_EXACT, + &idx) != TCL_OK) { + return -1; + } + if (idx == 0 /* -force */) { force = 1; - } else if (strcmp(TclGetString(objv[i]), "--") == 0) { + } else { /* -- */ i++; break; - } else { - Tcl_AppendResult(interp, "bad option \"", TclGetString(objv[i]), - "\": should be -force or --", NULL); - return -1; } } *forcePtr = force; @@ -921,13 +923,13 @@ FileBasename( * Tcl_Interp *interp; The interp to report errors with. Since * this is an object-based API, the object * form of the result should be used. - * CONST char *fileName; This is extracted using + * const char *fileName; This is extracted using * Tcl_TranslateFileName. * TclObj **attrObjPtrPtr; A new object to hold the attribute is * allocated and put here. * The first two parameters of the callback used to write out the * attributes are the same. The third parameter is: - * CONST *attrObjPtr; A pointer to the object that has the new + * const *attrObjPtr; A pointer to the object that has the new * attribute. * They both return standard TCL errors; if the routine to get an * attribute fails, no object is allocated and *attrObjPtrPtr is @@ -944,32 +946,37 @@ FileBasename( int TclFileAttrsCmd( + ClientData clientData, /* Unused */ Tcl_Interp *interp, /* The interpreter for error reporting. */ int objc, /* Number of command line arguments. */ - Tcl_Obj *CONST objv[]) /* The command line objects. */ + Tcl_Obj *const objv[]) /* The command line objects. */ { int result; - CONST char ** attributeStrings; - Tcl_Obj* objStrings = NULL; - int numObjStrings = -1, didAlloc = 0; + const char *const *attributeStrings; + const char **attributeStringsAllocated = NULL; + Tcl_Obj *objStrings = NULL; + int numObjStrings = -1; Tcl_Obj *filePtr; - if (objc < 3) { - Tcl_WrongNumArgs(interp, 2, objv, - "name ?option? ?value? ?option value ...?"); + if (objc < 2) { + Tcl_WrongNumArgs(interp, 1, objv, "name ?-option value ...?"); return TCL_ERROR; } - filePtr = objv[2]; + filePtr = objv[1]; if (Tcl_FSConvertToPathType(interp, filePtr) != TCL_OK) { - return TCL_ERROR; + return TCL_ERROR; } - objc -= 3; - objv += 3; + objc -= 2; + objv += 2; result = TCL_ERROR; Tcl_SetErrno(0); + /* + * Get the set of attribute names from the filesystem. + */ + attributeStrings = Tcl_FSFileAttrStrings(filePtr, &objStrings); if (attributeStrings == NULL) { int index; @@ -981,9 +988,10 @@ TclFileAttrsCmd( * There was an error, probably that the filePtr is not * accepted by any filesystem */ - Tcl_AppendResult(interp, "could not read \"", - TclGetString(filePtr), "\": ", Tcl_PosixError(interp), - NULL); + + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "could not read \"%s\": %s", + TclGetString(filePtr), Tcl_PosixError(interp))); } return TCL_ERROR; } @@ -1001,18 +1009,24 @@ TclFileAttrsCmd( if (Tcl_ListObjLength(interp, objStrings, &numObjStrings) != TCL_OK) { goto end; } - attributeStrings = (CONST char **) TclStackAlloc(interp, - (1+numObjStrings) * sizeof(char*)); - didAlloc = 1; + attributeStringsAllocated = (const char **) + TclStackAlloc(interp, (1+numObjStrings) * sizeof(char *)); for (index = 0; index < numObjStrings; index++) { Tcl_ListObjIndex(interp, objStrings, index, &objPtr); - attributeStrings[index] = TclGetString(objPtr); + attributeStringsAllocated[index] = TclGetString(objPtr); } - attributeStrings[index] = NULL; + attributeStringsAllocated[index] = NULL; + attributeStrings = attributeStringsAllocated; } else if (objStrings != NULL) { Tcl_Panic("must not update objPtrRef's variable and return non-NULL"); } + /* + * Process the attributes to produce a list of all of them, the value of a + * particular attribute, or to set one or more attributes (depending on + * the number of arguments). + */ + if (objc == 0) { /* * Get all attributes. @@ -1053,7 +1067,7 @@ TclFileAttrsCmd( goto end; } - Tcl_SetObjResult(interp, listPtr); + Tcl_SetObjResult(interp, listPtr); } else if (objc == 1) { /* * Get one attribute. @@ -1063,9 +1077,10 @@ TclFileAttrsCmd( Tcl_Obj *objPtr = NULL; if (numObjStrings == 0) { - Tcl_AppendResult(interp, "bad option \"", TclGetString(objv[0]), - "\", there are no file attributes in this filesystem.", - NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "bad option \"%s\", there are no file attributes in this" + " filesystem", TclGetString(objv[0]))); + Tcl_SetErrorCode(interp, "TCL","OPERATION","FATTR","NONE", NULL); goto end; } @@ -1073,9 +1088,8 @@ TclFileAttrsCmd( "option", 0, &index) != TCL_OK) { goto end; } - if (didAlloc) { + if (attributeStringsAllocated != NULL) { TclFreeIntRep(objv[0]); - objv[0]->typePtr = NULL; } if (Tcl_FSFileAttrsGet(interp, index, filePtr, &objPtr) != TCL_OK) { @@ -1090,51 +1104,410 @@ TclFileAttrsCmd( int i, index; if (numObjStrings == 0) { - Tcl_AppendResult(interp, "bad option \"", TclGetString(objv[0]), - "\", there are no file attributes in this filesystem.", - NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "bad option \"%s\", there are no file attributes in this" + " filesystem", TclGetString(objv[0]))); + Tcl_SetErrorCode(interp, "TCL","OPERATION","FATTR","NONE", NULL); goto end; } - for (i = 0; i < objc ; i += 2) { - if (Tcl_GetIndexFromObj(interp, objv[i], attributeStrings, + for (i = 0; i < objc ; i += 2) { + if (Tcl_GetIndexFromObj(interp, objv[i], attributeStrings, "option", 0, &index) != TCL_OK) { goto end; - } - if (didAlloc) { + } + if (attributeStringsAllocated != NULL) { TclFreeIntRep(objv[i]); - objv[i]->typePtr = NULL; } if (i + 1 == objc) { - Tcl_AppendResult(interp, "value for \"", - TclGetString(objv[i]), "\" missing", NULL); + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "value for \"%s\" missing", TclGetString(objv[i]))); + Tcl_SetErrorCode(interp, "TCL", "OPERATION", "FATTR", + "NOVALUE", NULL); goto end; } - if (Tcl_FSFileAttrsSet(interp, index, filePtr, - objv[i + 1]) != TCL_OK) { + if (Tcl_FSFileAttrsSet(interp, index, filePtr, + objv[i + 1]) != TCL_OK) { goto end; - } - } + } + } } result = TCL_OK; + /* + * Free up the array we allocated and drop our reference to any list of + * attribute names issued by the filesystem. + */ + end: - if (didAlloc) { + if (attributeStringsAllocated != NULL) { + TclStackFree(interp, (void *) attributeStringsAllocated); + } + if (objStrings != NULL) { + Tcl_DecrRefCount(objStrings); + } + return result; +} + +/* + *---------------------------------------------------------------------- + * + * TclFileLinkCmd -- + * + * This function is invoked to process the "file link" Tcl command. See + * the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * May create a new link. + * + *---------------------------------------------------------------------- + */ + +int +TclFileLinkCmd( + ClientData clientData, + Tcl_Interp *interp, + int objc, + Tcl_Obj *const objv[]) +{ + Tcl_Obj *contents; + int index; + + if (objc < 2 || objc > 4) { + Tcl_WrongNumArgs(interp, 1, objv, "?-linktype? linkname ?target?"); + return TCL_ERROR; + } + + /* + * Index of the 'source' argument. + */ + + if (objc == 4) { + index = 2; + } else { + index = 1; + } + + if (objc > 2) { + int linkAction; + + if (objc == 4) { + /* + * We have a '-linktype' argument. + */ + + static const char *const linkTypes[] = { + "-symbolic", "-hard", NULL + }; + if (Tcl_GetIndexFromObj(interp, objv[1], linkTypes, "option", 0, + &linkAction) != TCL_OK) { + return TCL_ERROR; + } + if (linkAction == 0) { + linkAction = TCL_CREATE_SYMBOLIC_LINK; + } else { + linkAction = TCL_CREATE_HARD_LINK; + } + } else { + linkAction = TCL_CREATE_SYMBOLIC_LINK | TCL_CREATE_HARD_LINK; + } + if (Tcl_FSConvertToPathType(interp, objv[index]) != TCL_OK) { + return TCL_ERROR; + } + /* - * Free up the array we allocated. + * Create link from source to target. */ - TclStackFree(interp, (void *)attributeStrings); + contents = Tcl_FSLink(objv[index], objv[index+1], linkAction); + if (contents == NULL) { + /* + * We handle three common error cases specially, and for all other + * errors, we use the standard posix error message. + */ + + if (errno == EEXIST) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "could not create new link \"%s\": that path already" + " exists", TclGetString(objv[index]))); + Tcl_PosixError(interp); + } else if (errno == ENOENT) { + /* + * There are two cases here: either the target doesn't exist, + * or the directory of the src doesn't exist. + */ + + int access; + Tcl_Obj *dirPtr = TclPathPart(interp, objv[index], + TCL_PATH_DIRNAME); + + if (dirPtr == NULL) { + return TCL_ERROR; + } + access = Tcl_FSAccess(dirPtr, F_OK); + Tcl_DecrRefCount(dirPtr); + if (access != 0) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "could not create new link \"%s\": no such file" + " or directory", TclGetString(objv[index]))); + Tcl_PosixError(interp); + } else { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "could not create new link \"%s\": target \"%s\" " + "doesn't exist", TclGetString(objv[index]), + TclGetString(objv[index+1]))); + errno = ENOENT; + Tcl_PosixError(interp); + } + } else { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "could not create new link \"%s\" pointing to \"%s\": %s", + TclGetString(objv[index]), + TclGetString(objv[index+1]), Tcl_PosixError(interp))); + } + return TCL_ERROR; + } + } else { + if (Tcl_FSConvertToPathType(interp, objv[index]) != TCL_OK) { + return TCL_ERROR; + } + + /* + * Read link + */ + + contents = Tcl_FSLink(objv[index], NULL, 0); + if (contents == NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "could not read link \"%s\": %s", + TclGetString(objv[index]), Tcl_PosixError(interp))); + return TCL_ERROR; + } } + Tcl_SetObjResult(interp, contents); + if (objc == 2) { + /* + * If we are reading a link, we need to free this result refCount. If + * we are creating a link, this will just be objv[index+1], and so we + * don't own it. + */ + + Tcl_DecrRefCount(contents); + } + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * TclFileReadLinkCmd -- + * + * This function is invoked to process the "file readlink" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +int +TclFileReadLinkCmd( + ClientData clientData, + Tcl_Interp *interp, + int objc, + Tcl_Obj *const objv[]) +{ + Tcl_Obj *contents; + + if (objc != 2) { + Tcl_WrongNumArgs(interp, 1, objv, "name"); + return TCL_ERROR; + } + + if (Tcl_FSConvertToPathType(interp, objv[1]) != TCL_OK) { + return TCL_ERROR; + } + + contents = Tcl_FSLink(objv[1], NULL, 0); + + if (contents == NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "could not read link \"%s\": %s", + TclGetString(objv[1]), Tcl_PosixError(interp))); + return TCL_ERROR; + } + Tcl_SetObjResult(interp, contents); + Tcl_DecrRefCount(contents); + return TCL_OK; +} + +/* + *--------------------------------------------------------------------------- + * + * TclFileTemporaryCmd + * + * This function implements the "tempfile" subcommand of the "file" + * command. + * + * Results: + * Returns a standard Tcl result. + * + * Side effects: + * Creates a temporary file. Opens a channel to that file and puts the + * name of that channel in the result. *Might* register suitable exit + * handlers to ensure that the temporary file gets deleted. Might write + * to a variable, so reentrancy is a potential issue. + * + *--------------------------------------------------------------------------- + */ + +int +TclFileTemporaryCmd( + ClientData clientData, + Tcl_Interp *interp, + int objc, + Tcl_Obj *const objv[]) +{ + Tcl_Obj *nameVarObj = NULL; /* Variable to store the name of the temporary + * file in. */ + Tcl_Obj *nameObj = NULL; /* Object that will contain the filename. */ + Tcl_Channel chan; /* The channel opened (RDWR) on the temporary + * file, or NULL if there's an error. */ + Tcl_Obj *tempDirObj = NULL, *tempBaseObj = NULL, *tempExtObj = NULL; + /* Pieces of template. Each piece is NULL if + * it is omitted. The platform temporary file + * engine might ignore some pieces. */ + + if (objc < 1 || objc > 3) { + Tcl_WrongNumArgs(interp, 1, objv, "?nameVar? ?template?"); + return TCL_ERROR; + } + + if (objc > 1) { + nameVarObj = objv[1]; + TclNewObj(nameObj); + } + if (objc > 2) { + int length; + Tcl_Obj *templateObj = objv[2]; + const char *string = TclGetStringFromObj(templateObj, &length); - if (objStrings != NULL) { /* - * We don't need this object that was passed to us any more. + * Treat an empty string as if it wasn't there. */ - Tcl_DecrRefCount(objStrings); + if (length == 0) { + goto makeTemporary; + } + + /* + * The template only gives a directory if there is a directory + * separator in it. + */ + + if (strchr(string, '/') != NULL + || (tclPlatform == TCL_PLATFORM_WINDOWS + && strchr(string, '\\') != NULL)) { + tempDirObj = TclPathPart(interp, templateObj, TCL_PATH_DIRNAME); + + /* + * Only allow creation of temporary files in the native filesystem + * since they are frequently used for integration with external + * tools or system libraries. [Bug 2388866] + */ + + if (tempDirObj != NULL && Tcl_FSGetFileSystemForPath(tempDirObj) + != &tclNativeFilesystem) { + TclDecrRefCount(tempDirObj); + tempDirObj = NULL; + } + } + + /* + * The template only gives the filename if the last character isn't a + * directory separator. + */ + + if (string[length-1] != '/' && (tclPlatform != TCL_PLATFORM_WINDOWS + || string[length-1] != '\\')) { + Tcl_Obj *tailObj = TclPathPart(interp, templateObj, + TCL_PATH_TAIL); + + if (tailObj != NULL) { + tempBaseObj = TclPathPart(interp, tailObj, TCL_PATH_ROOT); + tempExtObj = TclPathPart(interp, tailObj, TCL_PATH_EXTENSION); + TclDecrRefCount(tailObj); + } + } } - return result; + + /* + * Convert empty parts of the template into unspecified parts. + */ + + if (tempDirObj && !TclGetString(tempDirObj)[0]) { + TclDecrRefCount(tempDirObj); + tempDirObj = NULL; + } + if (tempBaseObj && !TclGetString(tempBaseObj)[0]) { + TclDecrRefCount(tempBaseObj); + tempBaseObj = NULL; + } + if (tempExtObj && !TclGetString(tempExtObj)[0]) { + TclDecrRefCount(tempExtObj); + tempExtObj = NULL; + } + + /* + * Create and open the temporary file. + */ + + makeTemporary: + chan = TclpOpenTemporaryFile(tempDirObj,tempBaseObj,tempExtObj, nameObj); + + /* + * If we created pieces of template, get rid of them now. + */ + + if (tempDirObj) { + TclDecrRefCount(tempDirObj); + } + if (tempBaseObj) { + TclDecrRefCount(tempBaseObj); + } + if (tempExtObj) { + TclDecrRefCount(tempExtObj); + } + + /* + * Deal with results. + */ + + if (chan == NULL) { + if (nameVarObj) { + TclDecrRefCount(nameObj); + } + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "can't create temporary file: %s", Tcl_PosixError(interp))); + return TCL_ERROR; + } + Tcl_RegisterChannel(interp, chan); + if (nameVarObj != NULL) { + if (Tcl_ObjSetVar2(interp, nameVarObj, NULL, nameObj, + TCL_LEAVE_ERR_MSG) == NULL) { + Tcl_UnregisterChannel(interp, chan); + return TCL_ERROR; + } + } + Tcl_SetObjResult(interp, Tcl_NewStringObj(Tcl_GetChannelName(chan), -1)); + return TCL_OK; } /* |