tclMacEnv.c
上传用户:rrhhcc
上传日期:2015-12-11
资源大小:54129k
文件大小:13k
- /*
- * tclMacEnv.c --
- *
- * Implements the "environment" on a Macintosh.
- *
- * Copyright (c) 1995-1996 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: tclMacEnv.c,v 1.2 1998/09/14 18:40:04 stanton Exp $
- */
- #include <Gestalt.h>
- #include <Folders.h>
- #include <TextUtils.h>
- #include <Resources.h>
- #include <string.h>
- #include "tcl.h"
- #include "tclInt.h"
- #include "tclMacInt.h"
- #include "tclPort.h"
- #define kMaxEnvStringSize 255
- #define kMaxEnvVarSize 100
- #define kLoginnameTag "LOGIN="
- #define kUsernameTag "USER="
- #define kDefaultDirTag "HOME="
- /*
- * The following specifies a text file where additional environment variables
- * can be set. The file must reside in the preferences folder. If the file
- * doesn't exist NO error will occur. Commet out the difinition if you do
- * NOT want to use an environment variables file.
- */
- #define kPrefsFile "Tcl Environment Variables"
- /*
- * The following specifies the Name of a 'STR#' resource in the application
- * where additional environment variables may be set. If the resource doesn't
- * exist no errors will occur. Commet it out if you don't want it.
- */
- #define REZ_ENV "pTcl Environment Variables"
- /* Globals */
- char **environ = NULL;
- /*
- * Declarations for local procedures defined in this file:
- */
- static char ** RezRCVariables _ANSI_ARGS_((void));
- static char ** FileRCVariables _ANSI_ARGS_((void));
- static char ** PathVariables _ANSI_ARGS_((void));
- static char ** SystemVariables _ANSI_ARGS_((void));
- static char * MakeFolderEnvVar _ANSI_ARGS_((char * prefixTag,
- long whichFolder));
- static char * GetUserName _ANSI_ARGS_((void));
- /*
- *----------------------------------------------------------------------
- *
- * RezRCVariables --
- *
- * Creates environment variables from the applications resource fork.
- * The function looks for the 'STR#' resource with the name defined
- * in the #define REZ_ENV. If the define is not defined this code
- * will not be included. If the resource doesn't exist or no strings
- * reside in the resource nothing will happen.
- *
- * Results:
- * ptr to value on success, NULL if error.
- *
- * Side effects:
- * Memory is allocated and returned to the caller.
- *
- *----------------------------------------------------------------------
- */
- #ifdef REZ_ENV
- static char **
- RezRCVariables()
- {
- Handle envStrs = NULL;
- char** rezEnv = NULL;
- short int numStrs;
- envStrs = GetNamedResource('STR#', REZ_ENV);
- if (envStrs == NULL) return NULL;
- numStrs = *((short *) (*envStrs));
-
- rezEnv = (char **) ckalloc((numStrs + 1) * sizeof(char *));
- if (envStrs != NULL) {
- ResType theType;
- Str255 theName;
- short theID, index = 1;
- int i = 0;
- char* string;
-
- GetResInfo(envStrs, &theID, &theType, theName);
- for(;;) {
- GetIndString(theName, theID, index++);
- if (theName[0] == ' ') break;
- string = (char *) ckalloc(theName[0] + 2);
- strncpy(string, (char *) theName + 1, theName[0]);
- string[theName[0]] = ' ';
- rezEnv[i++] = string;
- }
- ReleaseResource(envStrs);
-
- rezEnv[i] = NULL;
- return rezEnv;
- }
-
- return NULL;
- }
- #endif
- /*
- *----------------------------------------------------------------------
- *
- * FileRCVariables --
- *
- * Creates environment variables from a file in the system preferences
- * folder. The function looks for a file in the preferences folder
- * a name defined in the #define kPrefsFile. If the define is not
- * defined this code will not be included. If the resource doesn't exist or
- * no strings reside in the resource nothing will happen.
- *
- * Results:
- * ptr to value on success, NULL if error.
- *
- * Side effects:
- * Memory is allocated and returned to the caller.
- *
- *----------------------------------------------------------------------
- */
- #ifdef kPrefsFile
- static char **
- FileRCVariables()
- {
- char *prefsFolder = NULL;
- char *tempPtr = NULL;
- char **fileEnv = NULL;
- FILE *thePrefsFile = NULL;
- int i;
- FSSpec prefDir;
- OSErr err;
- Handle theString = NULL;
- Tcl_Channel chan;
- int size;
- Tcl_DString lineRead;
-
- err = FSpFindFolder(kOnSystemDisk, kPreferencesFolderType,
- kDontCreateFolder, &prefDir);
- if (err != noErr) {
- return NULL;
- }
- err = FSpPathFromLocation(&prefDir, &size, &theString);
- if (err != noErr) {
- return NULL;
- }
- (void) Munger(theString, size, NULL, 0, kPrefsFile, strlen(kPrefsFile));
- HLock(theString);
- chan = Tcl_OpenFileChannel(NULL, *theString, "r", 0);
- HUnlock(theString);
- DisposeHandle(theString);
- if (chan == NULL) {
- return NULL;
- }
- /*
- * We found a env file. Let start parsing it.
- */
- fileEnv = (char **) ckalloc((kMaxEnvVarSize + 1) * sizeof(char *));
- i = 0;
- Tcl_DStringInit(&lineRead);
- while (Tcl_Gets(chan, &lineRead) != -1) {
- /*
- * First strip off new line char
- */
- if (lineRead.string[lineRead.length-1] == 'n') {
- lineRead.string[lineRead.length-1] = ' ';
- }
- if (lineRead.string[0] == ' ' || lineRead.string[0] == '#') {
- /*
- * skip empty lines or commented lines
- */
- Tcl_DStringSetLength(&lineRead, 0);
- continue;
- }
-
- tempPtr = (char *) ckalloc(lineRead.length + 1);
- strcpy(tempPtr, lineRead.string);
- fileEnv[i++] = tempPtr;
- Tcl_DStringSetLength(&lineRead, 0);
- }
-
- fileEnv[i] = NULL;
- Tcl_Close(NULL, chan);
- Tcl_DStringFree(&lineRead);
-
- return fileEnv;
- }
- #endif
- /*
- *----------------------------------------------------------------------
- *
- * MakeFolderEnvVar --
- *
- * This function creates "environment" variable by taking a prefix and
- * appending a folder path to a directory. The directory is specified
- * by a integer value acceptable by the FindFolder function.
- *
- * Results:
- * The function returns an *allocated* string. If the folder doesn't
- * exist the return string is still allocated and just contains the
- * given prefix.
- *
- * Side effects:
- * Memory is allocated and returned to the caller.
- *
- *----------------------------------------------------------------------
- */
- static char *
- MakeFolderEnvVar(
- char * prefixTag, /* Prefix added before result. */
- long whichFolder) /* Constant for FSpFindFolder. */
- {
- char * thePath = NULL;
- char * result = NULL;
- OSErr theErr = noErr;
- Handle theString = NULL;
- FSSpec theFolder;
- int size;
- Tcl_DString pathStr;
- Tcl_DString tagPathStr;
-
- Tcl_DStringInit(&pathStr);
- theErr = FSpFindFolder(kOnSystemDisk, whichFolder,
- kDontCreateFolder, &theFolder);
- if (theErr == noErr) {
- theErr = FSpPathFromLocation(&theFolder, &size, &theString);
-
- HLock(theString);
- tclPlatform = TCL_PLATFORM_MAC;
- Tcl_DStringAppend(&pathStr, *theString, -1);
- HUnlock(theString);
- DisposeHandle(theString);
-
- Tcl_DStringInit(&tagPathStr);
- Tcl_DStringAppend(&tagPathStr, prefixTag, strlen(prefixTag));
- Tcl_DStringAppend(&tagPathStr, pathStr.string, pathStr.length);
- Tcl_DStringFree(&pathStr);
-
- /*
- * Make sure the path ends with a ':'
- */
- if (tagPathStr.string[tagPathStr.length - 1] != ':') {
- Tcl_DStringAppend(&tagPathStr, ":", 1);
- }
- /*
- * Don't free tagPathStr - rather make sure it's allocated
- * and return it as the result.
- */
- if (tagPathStr.string == tagPathStr.staticSpace) {
- result = (char *) ckalloc(tagPathStr.length + 1);
- strcpy(result, tagPathStr.string);
- } else {
- result = tagPathStr.string;
- }
- } else {
- result = (char *) ckalloc(strlen(prefixTag) + 1);
- strcpy(result, prefixTag);
- }
-
- return result;
- }
- /*
- *----------------------------------------------------------------------
- *
- * PathVariables --
- *
- * Creates environment variables from the system call FSpFindFolder.
- * The function generates environment variables for many of the
- * commonly used paths on the Macintosh.
- *
- * Results:
- * ptr to value on success, NULL if error.
- *
- * Side effects:
- * Memory is allocated and returned to the caller.
- *
- *----------------------------------------------------------------------
- */
- static char **
- PathVariables()
- {
- int i = 0;
- char **sysEnv;
- char *thePath = NULL;
-
- sysEnv = (char **) ckalloc((12) * sizeof(char *));
- sysEnv[i++] = MakeFolderEnvVar("PREF_FOLDER=", kPreferencesFolderType);
- sysEnv[i++] = MakeFolderEnvVar("SYS_FOLDER=", kSystemFolderType);
- sysEnv[i++] = MakeFolderEnvVar("TEMP=", kTemporaryFolderType);
- sysEnv[i++] = MakeFolderEnvVar("APPLE_M_FOLDER=", kAppleMenuFolderType);
- sysEnv[i++] = MakeFolderEnvVar("CP_FOLDER=", kControlPanelFolderType);
- sysEnv[i++] = MakeFolderEnvVar("DESK_FOLDER=", kDesktopFolderType);
- sysEnv[i++] = MakeFolderEnvVar("EXT_FOLDER=", kExtensionFolderType);
- sysEnv[i++] = MakeFolderEnvVar("PRINT_MON_FOLDER=",
- kPrintMonitorDocsFolderType);
- sysEnv[i++] = MakeFolderEnvVar("SHARED_TRASH_FOLDER=",
- kWhereToEmptyTrashFolderType);
- sysEnv[i++] = MakeFolderEnvVar("TRASH_FOLDER=", kTrashFolderType);
- sysEnv[i++] = MakeFolderEnvVar("START_UP_FOLDER=", kStartupFolderType);
- sysEnv[i++] = NULL;
-
- return sysEnv;
- }
- /*
- *----------------------------------------------------------------------
- *
- * SystemVariables --
- *
- * Creates environment variables from various Mac system calls.
- *
- * Results:
- * ptr to value on success, NULL if error.
- *
- * Side effects:
- * Memory is allocated and returned to the caller.
- *
- *----------------------------------------------------------------------
- */
- static char **
- SystemVariables()
- {
- int i = 0;
- char ** sysEnv;
- char * thePath = NULL;
- Handle theString = NULL;
- FSSpec currentDir;
- int size;
-
- sysEnv = (char **) ckalloc((4) * sizeof(char *));
- /*
- * Get user name from chooser. It will be assigned to both
- * the USER and LOGIN environment variables.
- */
- thePath = GetUserName();
- if (thePath != NULL) {
- sysEnv[i] = (char *) ckalloc(strlen(kLoginnameTag) + strlen(thePath) + 1);
- strcpy(sysEnv[i], kLoginnameTag);
- strcpy(sysEnv[i]+strlen(kLoginnameTag), thePath);
- i++;
- sysEnv[i] = (char *) ckalloc(strlen(kUsernameTag) + strlen(thePath) + 1);
- strcpy(sysEnv[i], kUsernameTag);
- strcpy(sysEnv[i]+strlen(kUsernameTag), thePath);
- i++;
- }
- /*
- * Get 'home' directory
- */
- #ifdef kDefaultDirTag
- FSpGetDefaultDir(¤tDir);
- FSpPathFromLocation(¤tDir, &size, &theString);
- HLock(theString);
- sysEnv[i] = (char *) ckalloc(strlen(kDefaultDirTag) + size + 4);
- strcpy(sysEnv[i], kDefaultDirTag);
- strncpy(sysEnv[i]+strlen(kDefaultDirTag) , *theString, size);
- if (sysEnv[i][strlen(kDefaultDirTag) + size - 1] != ':') {
- sysEnv[i][strlen(kDefaultDirTag) + size] = ':';
- sysEnv[i][strlen(kDefaultDirTag) + size + 1] = ' ';
- } else {
- sysEnv[i][strlen(kDefaultDirTag) + size] = ' ';
- }
- HUnlock(theString);
- DisposeHandle(theString);
- i++;
- #endif
- sysEnv[i++] = NULL;
- return sysEnv;
- }
- /*
- *----------------------------------------------------------------------
- *
- * TclMacCreateEnv --
- *
- * This function allocates and populates the global "environ"
- * variable. Entries are in traditional Unix format but variables
- * are, hopefully, a bit more relevant for the Macintosh.
- *
- * Results:
- * The number of elements in the newly created environ array.
- *
- * Side effects:
- * Memory is allocated and pointed too by the environ variable.
- *
- *----------------------------------------------------------------------
- */
- int
- TclMacCreateEnv()
- {
- char ** sysEnv = NULL;
- char ** pathEnv = NULL;
- char ** fileEnv = NULL;
- char ** rezEnv = NULL;
- int count = 0;
- int i, j;
- sysEnv = SystemVariables();
- if (sysEnv != NULL) {
- for (i = 0; sysEnv[i] != NULL; count++, i++) {
- /* Empty Loop */
- }
- }
- pathEnv = PathVariables();
- if (pathEnv != NULL) {
- for (i = 0; pathEnv[i] != NULL; count++, i++) {
- /* Empty Loop */
- }
- }
- #ifdef kPrefsFile
- fileEnv = FileRCVariables();
- if (fileEnv != NULL) {
- for (i = 0; fileEnv[i] != NULL; count++, i++) {
- /* Empty Loop */
- }
- }
- #endif
- #ifdef REZ_ENV
- rezEnv = RezRCVariables();
- if (rezEnv != NULL) {
- for (i = 0; rezEnv[i] != NULL; count++, i++) {
- /* Empty Loop */
- }
- }
- #endif
- /*
- * Create environ variable
- */
- environ = (char **) ckalloc((count + 1) * sizeof(char *));
- j = 0;
-
- if (sysEnv != NULL) {
- for (i = 0; sysEnv[i] != NULL;)
- environ[j++] = sysEnv[i++];
- ckfree((char *) sysEnv);
- }
- if (pathEnv != NULL) {
- for (i = 0; pathEnv[i] != NULL;)
- environ[j++] = pathEnv[i++];
- ckfree((char *) pathEnv);
- }
- #ifdef kPrefsFile
- if (fileEnv != NULL) {
- for (i = 0; fileEnv[i] != NULL;)
- environ[j++] = fileEnv[i++];
- ckfree((char *) fileEnv);
- }
- #endif
- #ifdef REZ_ENV
- if (rezEnv != NULL) {
- for (i = 0; rezEnv[i] != NULL;)
- environ[j++] = rezEnv[i++];
- ckfree((char *) rezEnv);
- }
- #endif
- environ[j] = NULL;
- return j;
- }
- /*
- *----------------------------------------------------------------------
- *
- * GetUserName --
- *
- * Get the user login name.
- *
- * Results:
- * ptr to static string, NULL if error.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
- static char *
- GetUserName()
- {
- static char buf[33];
- short refnum;
- Handle h;
-
- refnum = CurResFile();
- UseResFile(0);
- h = GetResource('STR ', -16096);
- UseResFile(refnum);
- if (h == NULL) {
- return NULL;
- }
-
- HLock(h);
- strncpy(buf, (*h)+1, **h);
- buf[**h] = ' ';
- HUnlock(h);
- ReleaseResource(h);
- return(buf[0] ? buf : NULL);
- }