Adding upstream version 2.9.0dev.12.upstream/2.9.0dev.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1516 insertions, 0 deletions

diff --git a/src/HTFWriter.c b/src/HTFWriter.c
new file mode 100644
index 0000000..9b7c0c6
--- /dev/null
+++ b/src/HTFWriter.c
@@ -0,0 +1,1516 @@
+/*
+ * $LynxId: HTFWriter.c,v 1.124 2022/07/25 00:16:38 tom Exp $
+ *
+ *		FILE WRITER				HTFWrite.h
+ *		===========
+ *
+ *	This version of the stream object just writes to a C file.
+ *	The file is assumed open and left open.
+ *
+ *	Bugs:
+ *		strings written must be less than buffer size.
+ */
+
+#define HTSTREAM_INTERNAL 1
+
+#include <HTUtils.h>
+#include <LYCurses.h>
+#include <HTFWriter.h>
+#include <HTSaveToFile.h>
+
+#ifdef WIN_EX
+#include <HTParse.h>
+#endif
+
+#include <HTFormat.h>
+#include <UCDefs.h>
+#include <HTAlert.h>
+#include <HTFile.h>
+#include <HTInit.h>
+#include <HTPlain.h>
+
+#include <LYStrings.h>
+#include <LYUtils.h>
+#include <LYGlobalDefs.h>
+#include <LYClean.h>
+#include <GridText.h>
+#include <LYExtern.h>
+#include <LYexit.h>
+#include <LYLeaks.h>
+#include <LYKeymap.h>
+#include <LYGetFile.h>
+#include <LYHistory.h>		/* store statusline messages */
+
+#ifdef USE_PERSISTENT_COOKIES
+#include <LYCookie.h>
+#endif
+
+/* contains the name of the temp file which is being downloaded into */
+char *WWW_Download_File = NULL;
+BOOLEAN LYCancelDownload = FALSE;	/* exported to HTFormat.c in libWWW */
+
+#ifdef VMS
+static char *FIXED_RECORD_COMMAND = NULL;
+
+#ifdef USE_COMMAND_FILE		/* Keep this as an option. - FM    */
+#define FIXED_RECORD_COMMAND_MASK "@Lynx_Dir:FIXED512 %s"
+#else
+#define FIXED_RECORD_COMMAND_MASK "%s"
+static unsigned long LYVMS_FixedLengthRecords(char *filename);
+#endif /* USE_COMMAND_FILE */
+#endif /* VMS */
+
+HTStream *HTSaveToFile(HTPresentation *pres,
+		       HTParentAnchor *anchor,
+		       HTStream *sink);
+
+/*	Stream Object
+ *	-------------
+ */
+struct _HTStream {
+    const HTStreamClass *isa;
+
+    FILE *fp;			/* The file we've opened */
+    char *end_command;		/* What to do on _free.  */
+    char *remove_command;	/* What to do on _abort. */
+    char *viewer_command;	/* Saved external viewer */
+    HTFormat input_format;	/* Original pres->rep     */
+    HTFormat output_format;	/* Original pres->rep_out */
+    HTParentAnchor *anchor;	/* Original stream's anchor. */
+    HTStream *sink;		/* Original stream's sink.   */
+#ifdef FNAMES_8_3
+    BOOLEAN idash;		/* remember position to become '.' */
+#endif
+};
+
+/*_________________________________________________________________________
+ *
+ *			A C T I O N	R O U T I N E S
+ *  Bug:
+ *	Most errors are ignored.
+ */
+
+/*	Error handling
+ *	------------------
+ */
+static void HTFWriter_error(HTStream *me, const char *id)
+{
+    char buf[200];
+
+    sprintf(buf, "%.60s: %.60s: %.60s",
+	    id,
+	    me->isa->name,
+	    LYStrerror(errno));
+    HTAlert(buf);
+/*
+ * Only disaster results from:
+ *	me->isa->_abort(me, NULL);
+ */
+}
+
+/*	Character handling
+ *	------------------
+ */
+static void HTFWriter_put_character(HTStream *me, int c)
+{
+    if (me->fp) {
+	putc(c, me->fp);
+    }
+}
+
+/*	String handling
+ *	---------------
+ */
+static void HTFWriter_put_string(HTStream *me, const char *s)
+{
+    if (me->fp) {
+	fputs(s, me->fp);
+    }
+}
+
+/*	Buffer write.  Buffers can (and should!) be big.
+ *	------------
+ */
+static void HTFWriter_write(HTStream *me, const char *s, int l)
+{
+    size_t result;
+
+    if (me->fp) {
+	result = fwrite(s, (size_t) 1, (size_t) l, me->fp);
+	if (result != (size_t) l) {
+	    HTFWriter_error(me, "HTFWriter_write");
+	}
+    }
+}
+
+static void decompress_gzip(HTStream *me)
+{
+    char *in_name = me->anchor->FileCache;
+    char copied[LY_MAXPATH];
+    FILE *fp = LYOpenTemp(copied, ".tmp.gz", BIN_W);
+
+    if (fp != 0) {
+#ifdef USE_ZLIB
+	char buffer[BUFSIZ];
+	gzFile gzfp;
+	int status;
+
+	CTRACE((tfp, "decompressing '%s'\n", in_name));
+	if ((gzfp = gzopen(in_name, BIN_R)) != 0) {
+	    BOOL success = TRUE;
+	    size_t actual = 0;
+
+	    CTRACE((tfp, "...opened '%s'\n", copied));
+	    while ((status = gzread(gzfp, buffer, sizeof(buffer))) > 0) {
+		size_t want = (size_t) status;
+		size_t have = fwrite(buffer, sizeof(char), want, fp);
+
+		actual += have;
+		if (want != have) {
+		    success = FALSE;
+		    break;
+		}
+	    }
+	    gzclose(gzfp);
+	    LYCloseTempFP(fp);
+	    CTRACE((tfp, "...decompress %" PRI_off_t " to %lu\n",
+		    CAST_off_t (me->anchor->actual_length),
+		    (unsigned long)actual));
+	    if (success) {
+		if (LYRenameFile(copied, in_name) == 0)
+		    me->anchor->actual_length = (off_t) actual;
+		(void) LYRemoveTemp(copied);
+	    }
+	}
+#else
+#define FMT "%s %s"
+	const char *program;
+
+	if (LYCopyFile(in_name, copied) == 0) {
+	    char expanded[LY_MAXPATH];
+	    char *command = NULL;
+
+	    if ((program = HTGetProgramPath(ppUNCOMPRESS)) != NULL) {
+		HTAddParam(&command, FMT, 1, program);
+		HTAddParam(&command, FMT, 2, copied);
+		HTEndParam(&command, FMT, 2);
+	    }
+	    if (LYSystem(command) == 0) {
+		struct stat stat_buf;
+
+		strcpy(expanded, copied);
+		*strrchr(expanded, '.') = '\0';
+		if (LYRenameFile(expanded, in_name) != 0) {
+		    CTRACE((tfp, "rename failed %s to %s\n", expanded, in_name));
+		} else if (stat(in_name, &stat_buf) != 0) {
+		    CTRACE((tfp, "stat failed for %s\n", in_name));
+		} else {
+		    me->anchor->actual_length = stat_buf.st_size;
+		}
+	    } else {
+		CTRACE((tfp, "command failed: %s\n", command));
+	    }
+	    free(command);
+	    (void) LYRemoveTemp(copied);
+	}
+#undef FMT
+#endif
+    }
+}
+
+/*	Free an HTML object
+ *	-------------------
+ *
+ *	Note that the SGML parsing context is freed, but the created
+ *	object is not,
+ *	as it takes on an existence of its own unless explicitly freed.
+ */
+static void HTFWriter_free(HTStream *me)
+{
+    int len;
+    char *path = NULL;
+    char *addr = NULL;
+    BOOL use_zread = NO;
+    BOOLEAN found = FALSE;
+
+#ifdef WIN_EX
+    HANDLE cur_handle;
+
+    cur_handle = GetForegroundWindow();
+#endif
+
+    if (me->fp)
+	fflush(me->fp);
+    if (me->end_command) {	/* Temp file */
+	LYCloseTempFP(me->fp);
+	/*
+	 * Handle a special case where the server used "Content-Type:  gzip". 
+	 * Normally that feeds into the presentation stages, but if the link
+	 * happens to point to something that will not be presented, but
+	 * instead offered as a download, it comes here.  In that case, ungzip
+	 * the content before prompting the user for the place to store it.
+	 */
+	if (me->anchor->FileCache != NULL
+	    && me->anchor->no_content_encoding == FALSE
+	    && me->input_format == HTAtom_for("application/x-gzip")
+	    && !strcmp(me->anchor->content_encoding, "gzip")) {
+	    decompress_gzip(me);
+	}
+#ifdef VMS
+	if (0 == strcmp(me->end_command, "SaveVMSBinaryFile")) {
+	    /*
+	     * It's a binary file saved to disk on VMS, which
+	     * we want to convert to fixed records format.  - FM
+	     */
+#ifdef USE_COMMAND_FILE
+	    LYSystem(FIXED_RECORD_COMMAND);
+#else
+	    LYVMS_FixedLengthRecords(FIXED_RECORD_COMMAND);
+#endif /* USE_COMMAND_FILE */
+	    FREE(FIXED_RECORD_COMMAND);
+
+	    if (me->remove_command) {
+		/* NEVER REMOVE THE FILE unless during an abort! */
+		FREE(me->remove_command);
+	    }
+	} else
+#endif /* VMS */
+	if (me->input_format == HTAtom_for("www/compressed")) {
+	    /*
+	     * It's a compressed file supposedly cached to
+	     * a temporary file for uncompression.  - FM
+	     */
+	    if (me->anchor->FileCache != NULL) {
+		BOOL skip_loadfile = (BOOL) (me->viewer_command != NULL);
+
+		/*
+		 * Save the path with the "gz" or "Z" suffix trimmed,
+		 * and remove any previous uncompressed copy.  - FM
+		 */
+		StrAllocCopy(path, me->anchor->FileCache);
+		if ((len = (int) strlen(path)) > 3 &&
+		    (!strcasecomp(&path[len - 2], "gz") ||
+		     !strcasecomp(&path[len - 2], "zz"))) {
+#ifdef USE_ZLIB
+		    if (!skip_loadfile) {
+			use_zread = YES;
+		    } else
+#endif /* USE_ZLIB */
+		    {
+			path[len - 3] = '\0';
+			(void) remove(path);
+		    }
+		} else if (len > 4 && !strcasecomp(&path[len - 3], "bz2")) {
+#ifdef USE_BZLIB
+		    if (!skip_loadfile) {
+			use_zread = YES;
+		    } else
+#endif /* USE_BZLIB */
+		    {
+			path[len - 4] = '\0';
+			(void) remove(path);
+		    }
+		} else if (len > 3 && !strcasecomp(&path[len - 2], "br")) {
+#ifdef USE_BROTLI
+		    if (!skip_loadfile) {
+			use_zread = YES;
+		    } else
+#endif /* USE_BROTLI */
+		    {
+			path[len - 3] = '\0';
+			(void) remove(path);
+		    }
+		} else if (len > 2 && !strcasecomp(&path[len - 1], "Z")) {
+		    path[len - 2] = '\0';
+		    (void) remove(path);
+		}
+		if (!use_zread) {
+		    if (!dump_output_immediately) {
+			/*
+			 * Tell user what's happening.  - FM
+			 */
+			_HTProgress(me->end_command);
+		    }
+		    /*
+		     * Uncompress it.  - FM
+		     */
+		    if (!isEmpty(me->end_command))
+			LYSystem(me->end_command);
+		    found = LYCanReadFile(me->anchor->FileCache);
+		}
+		if (found) {
+		    /*
+		     * It's still there with the "gz" or "Z" suffix,
+		     * so the uncompression failed.  - FM
+		     */
+		    if (!dump_output_immediately) {
+			lynx_force_repaint();
+			LYrefresh();
+		    }
+		    HTAlert(ERROR_UNCOMPRESSING_TEMP);
+		    (void) LYRemoveTemp(me->anchor->FileCache);
+		    FREE(me->anchor->FileCache);
+		} else {
+		    /*
+		     * Succeeded!  Create a complete address
+		     * for the uncompressed file and invoke
+		     * HTLoadFile() to handle it.  - FM
+		     */
+#ifdef FNAMES_8_3
+		    /*
+		     * Assuming we have just uncompressed e.g.
+		     * FILE-mpeg.gz -> FILE-mpeg, restore/shorten
+		     * the name to be fit for passing to an external
+		     * viewer, by renaming FILE-mpeg -> FILE.mpe - kw
+		     */
+		    if (skip_loadfile) {
+			char *new_path = NULL;
+			char *the_dash = me->idash ? strrchr(path, '-') : 0;
+
+			if (the_dash != 0) {
+			    unsigned off = (the_dash - path);
+
+			    StrAllocCopy(new_path, path);
+			    new_path[off] = '.';
+			    if (strlen(new_path + off) > 4)
+				new_path[off + 4] = '\0';
+			    if (LYRenameFile(path, new_path) == 0) {
+				FREE(path);
+				path = new_path;
+			    } else {
+				FREE(new_path);
+			    }
+			}
+		    }
+#endif /* FNAMES_8_3 */
+		    LYLocalFileToURL(&addr, path);
+		    if (!use_zread) {
+			LYRenamedTemp(me->anchor->FileCache, path);
+			StrAllocCopy(me->anchor->FileCache, path);
+			StrAllocCopy(me->anchor->content_encoding, "binary");
+		    }
+		    FREE(path);
+		    if (!skip_loadfile) {
+			/*
+			 * Lock the chartrans info we may possibly have,
+			 * so HTCharsetFormat() will not apply the default
+			 * for local files.  - KW
+			 */
+			if (HTAnchor_getUCLYhndl(me->anchor,
+						 UCT_STAGE_PARSER) < 0) {
+			    /*
+			     * If not yet set - KW
+			     */
+			    HTAnchor_copyUCInfoStage(me->anchor,
+						     UCT_STAGE_PARSER,
+						     UCT_STAGE_MIME,
+						     UCT_SETBY_DEFAULT + 1);
+			}
+			HTAnchor_copyUCInfoStage(me->anchor,
+						 UCT_STAGE_PARSER,
+						 UCT_STAGE_MIME, -1);
+		    }
+		    /*
+		     * Create a complete address for
+		     * the uncompressed file.  - FM
+		     */
+		    if (!dump_output_immediately) {
+			/*
+			 * Tell user what's happening.  - FM
+			 * HTInfoMsg2(WWW_USING_MESSAGE, addr);
+			 * but only in the history, not on screen -RS
+			 */
+			LYstore_message2(WWW_USING_MESSAGE, addr);
+		    }
+
+		    if (skip_loadfile) {
+			/*
+			 * It's a temporary file we're passing to a viewer or
+			 * helper application.  Loading the temp file through
+			 * HTLoadFile() would result in yet another HTStream
+			 * (created with HTSaveAndExecute()) which would just
+			 * copy the temp file to another temp file (or even the
+			 * same!).  We can skip this needless duplication by
+			 * using the viewer_command which has already been
+			 * determined when the HTCompressed stream was created. 
+			 * - kw
+			 */
+			FREE(me->end_command);
+
+			HTAddParam(&(me->end_command), me->viewer_command, 1, me->anchor->FileCache);
+			HTEndParam(&(me->end_command), me->viewer_command, 1);
+
+			if (!dump_output_immediately) {
+			    /*
+			     * Tell user what's happening.  - FM
+			     */
+			    HTProgress(me->end_command);
+#ifndef WIN_EX
+			    stop_curses();
+#endif
+			}
+#ifdef _WIN_CC
+			exec_command(me->end_command, FALSE);
+#else
+			LYSystem(me->end_command);
+#endif
+			if (me->remove_command) {
+			    /* NEVER REMOVE THE FILE unless during an abort!!! */
+			    FREE(me->remove_command);
+			}
+			if (!dump_output_immediately) {
+#ifdef WIN_EX
+			    if (focus_window) {
+				HTInfoMsg(gettext("Set focus1"));
+				(void) SetForegroundWindow(cur_handle);
+			    }
+#else
+			    start_curses();
+#endif
+			}
+		    } else {
+			(void) HTLoadFile(addr,
+					  me->anchor,
+					  me->output_format,
+					  me->sink);
+		    }
+		    if (dump_output_immediately &&
+			me->output_format == WWW_PRESENT) {
+			FREE(addr);
+			(void) remove(me->anchor->FileCache);
+			FREE(me->anchor->FileCache);
+			FREE(me->remove_command);
+			FREE(me->end_command);
+			FREE(me->viewer_command);
+			FREE(me);
+			return;
+		    }
+		}
+		FREE(addr);
+	    }
+	    if (me->remove_command) {
+		/* NEVER REMOVE THE FILE unless during an abort!!! */
+		FREE(me->remove_command);
+	    }
+	} else if (strcmp(me->end_command, "SaveToFile")) {
+	    /*
+	     * It's a temporary file we're passing to a viewer or helper
+	     * application.  - FM
+	     */
+	    if (!dump_output_immediately) {
+		/*
+		 * Tell user what's happening.  - FM
+		 */
+		_HTProgress(me->end_command);
+#ifndef WIN_EX
+		stop_curses();
+#endif
+	    }
+#ifdef _WIN_CC
+	    exec_command(me->end_command, wait_viewer_termination);
+#else
+	    LYSystem(me->end_command);
+#endif
+
+	    if (me->remove_command) {
+		/* NEVER REMOVE THE FILE unless during an abort!!! */
+		FREE(me->remove_command);
+	    }
+	    if (!dump_output_immediately) {
+#ifdef WIN_EX
+		if (focus_window) {
+		    HTInfoMsg(gettext("Set focus2"));
+		    (void) SetForegroundWindow(cur_handle);
+		}
+#else
+		start_curses();
+#endif
+	    }
+	} else {
+	    /*
+	     * It's a file we saved to disk for handling via a menu.  - FM
+	     */
+	    if (me->remove_command) {
+		/* NEVER REMOVE THE FILE unless during an abort!!! */
+		FREE(me->remove_command);
+	    }
+	    if (!dump_output_immediately) {
+#ifdef WIN_EX
+		if (focus_window) {
+		    HTInfoMsg(gettext("Set focus3"));
+		    (void) SetForegroundWindow(cur_handle);
+		}
+#else
+		start_curses();
+#endif
+	    }
+	}
+	FREE(me->end_command);
+    }
+    FREE(me->viewer_command);
+
+    if (dump_output_immediately) {
+	if (me->anchor->FileCache)
+	    (void) remove(me->anchor->FileCache);
+	FREE(me);
+#ifdef USE_PERSISTENT_COOKIES
+	/*
+	 * We want to save cookies picked up when in source mode.  ...
+	 */
+	if (persistent_cookies)
+	    LYStoreCookies(LYCookieSaveFile);
+#endif /* USE_PERSISTENT_COOKIES */
+	exit_immediately(EXIT_SUCCESS);
+    }
+
+    FREE(me);
+    return;
+}
+
+#ifdef VMS
+#  define REMOVE_COMMAND "delete/noconfirm/nolog %s;"
+#else
+#  define REMOVE_COMMAND "%s"
+#endif /* VMS */
+
+/*	Abort writing
+ *	-------------
+ */
+static void HTFWriter_abort(HTStream *me, HTError e GCC_UNUSED)
+{
+    CTRACE((tfp, "HTFWriter_abort called\n"));
+    LYCloseTempFP(me->fp);
+    FREE(me->viewer_command);
+    if (me->end_command) {	/* Temp file */
+	CTRACE((tfp, "HTFWriter: Aborting: file not executed or saved.\n"));
+	FREE(me->end_command);
+	if (me->remove_command) {
+#ifdef VMS
+	    LYSystem(me->remove_command);
+#else
+	    (void) chmod(me->remove_command, 0600);	/* Ignore errors */
+	    if (0 != unlink(me->remove_command)) {
+		char buf[560];
+
+		sprintf(buf, "%.60s '%.400s': %.60s",
+			gettext("Error deleting file"),
+			me->remove_command, LYStrerror(errno));
+		HTAlert(buf);
+	    }
+#endif
+	    FREE(me->remove_command);
+	}
+    }
+
+    FREE(WWW_Download_File);
+
+    FREE(me);
+}
+
+/*	Structured Object Class
+ *	-----------------------
+ */
+static const HTStreamClass HTFWriter =	/* As opposed to print etc */
+{
+    "FileWriter",
+    HTFWriter_free,
+    HTFWriter_abort,
+    HTFWriter_put_character,
+    HTFWriter_put_string,
+    HTFWriter_write
+};
+
+/*	Subclass-specific Methods
+ *	-------------------------
+ */
+HTStream *HTFWriter_new(FILE *fp)
+{
+    HTStream *me;
+
+    if (!fp)
+	return NULL;
+
+    me = typecalloc(HTStream);
+    if (me == NULL)
+	outofmem(__FILE__, "HTFWriter_new");
+
+    me->isa = &HTFWriter;
+
+    me->fp = fp;
+    me->end_command = NULL;
+    me->remove_command = NULL;
+    me->anchor = NULL;
+    me->sink = NULL;
+
+    return me;
+}
+
+/*	Make system command from template
+ *	---------------------------------
+ *
+ *	See mailcap spec for description of template.
+ */
+static char *mailcap_substitute(HTParentAnchor *anchor,
+				HTPresentation *pres,
+				char *fnam)
+{
+    char *result = LYMakeMailcapCommand(pres->command,
+					anchor->content_type_params,
+					fnam);
+
+#if defined(UNIX)
+    /* if we don't have a "%s" token, expect to provide the file via stdin */
+    if (!LYMailcapUsesPctS(pres->command)) {
+	char *prepend = 0;
+	const char *format = "( %s ) < %s";
+
+	HTSprintf(&prepend, "( %s", result);	/* ...avoid quoting */
+	HTAddParam(&prepend, format, 2, fnam);	/* ...to quote if needed */
+	FREE(result);
+	result = prepend;
+    }
+#endif
+    return result;
+}
+
+/*	Take action using a system command
+ *	----------------------------------
+ *
+ *	originally from Ghostview handling by Marc Andreseen.
+ *	Creates temporary file, writes to it, executes system command
+ *	on end-document.  The suffix of the temp file can be given
+ *	in case the application is fussy, or so that a generic opener can
+ *	be used.
+ */
+HTStream *HTSaveAndExecute(HTPresentation *pres,
+			   HTParentAnchor *anchor,
+			   HTStream *sink)
+{
+    char fnam[LY_MAXPATH];
+    const char *suffix;
+    HTStream *me;
+
+    if (traversal) {
+	LYCancelledFetch = TRUE;
+	return (NULL);
+    }
+#if defined(EXEC_LINKS) || defined(EXEC_SCRIPTS)
+    if (pres->quality >= 999.0) {	/* exec link */
+	if (dump_output_immediately) {
+	    LYCancelledFetch = TRUE;
+	    return (NULL);
+	}
+	if (no_exec) {
+	    HTAlert(EXECUTION_DISABLED);
+	    return HTPlainPresent(pres, anchor, sink);
+	}
+	if (!local_exec) {
+	    if (local_exec_on_local_files &&
+		(LYJumpFileURL ||
+		 !StrNCmp(anchor->address, "file://localhost", 16))) {
+		/* allow it to continue */
+		;
+	    } else {
+		char *buf = 0;
+
+		HTSprintf0(&buf, EXECUTION_DISABLED_FOR_FILE,
+			   key_for_func(LYK_OPTIONS));
+		HTAlert(buf);
+		FREE(buf);
+		return HTPlainPresent(pres, anchor, sink);
+	    }
+	}
+    }
+#endif /* EXEC_LINKS || EXEC_SCRIPTS */
+
+    if (dump_output_immediately) {
+	return (HTSaveToFile(pres, anchor, sink));
+    }
+
+    me = typecalloc(HTStream);
+    if (me == NULL)
+	outofmem(__FILE__, "HTSaveAndExecute");
+
+    me->isa = &HTFWriter;
+    me->input_format = pres->rep;
+    me->output_format = pres->rep_out;
+    me->anchor = anchor;
+    me->sink = sink;
+
+    if (LYCachedTemp(fnam, &(anchor->FileCache))) {
+	/* This used to be LYNewBinFile(fnam); changed to a different call so
+	 * that the open fp gets registered in the list keeping track of temp
+	 * files, equivalent to when LYOpenTemp() gets called below.  This
+	 * avoids a file descriptor leak caused by LYCloseTempFP() not being
+	 * able to find the fp.  The binary suffix is expected to not be used,
+	 * it's only for fallback in unusual error cases.  - kw
+	 */
+	me->fp = LYOpenTempRewrite(fnam, BIN_SUFFIX, BIN_W);
+    } else {
+#if defined(WIN_EX) && !defined(__CYGWIN__)	/* 1998/01/04 (Sun) */
+	if (!StrNCmp(anchor->address, "file://localhost", 16)) {
+
+	    /* 1998/01/23 (Fri) 17:38:26 */
+	    char *cp, *view_fname;
+
+	    me->fp = NULL;
+
+	    view_fname = fnam + 3;
+	    LYStrNCpy(view_fname, anchor->address + 17, sizeof(fnam) - 5);
+	    HTUnEscape(view_fname);
+
+	    if (StrChr(view_fname, ':') == NULL) {
+		fnam[0] = windows_drive[0];
+		fnam[1] = windows_drive[1];
+		fnam[2] = '/';
+		view_fname = fnam;
+	    }
+
+	    /* 1998/04/21 (Tue) 11:04:16 */
+	    cp = view_fname;
+	    while (*cp) {
+		if (IS_SJIS_HI1(UCH(*cp)) || IS_SJIS_HI2(UCH(*cp))) {
+		    cp += 2;
+		    continue;
+		} else if (*cp == '/') {
+		    *cp = '\\';
+		}
+		cp++;
+	    }
+	    if (StrChr(view_fname, ' '))
+		view_fname = quote_pathname(view_fname);
+
+	    StrAllocCopy(me->viewer_command, pres->command);
+
+	    me->end_command = mailcap_substitute(anchor, pres, view_fname);
+	    me->remove_command = NULL;
+
+	    return me;
+	}
+#endif
+	/*
+	 * Check for a suffix.
+	 * Save the file under a suitably suffixed name.
+	 */
+	if (!strcasecomp(pres->rep->name, STR_HTML)) {
+	    suffix = HTML_SUFFIX;
+	} else if (!strncasecomp(pres->rep->name, "text/", 5)) {
+	    suffix = TEXT_SUFFIX;
+	} else if ((suffix = HTFileSuffix(pres->rep,
+					  anchor->content_encoding)) == 0
+		   || *suffix != '.') {
+	    if (!strncasecomp(pres->rep->name, "application/", 12)) {
+		suffix = BIN_SUFFIX;
+	    } else {
+		suffix = HTML_SUFFIX;
+	    }
+	}
+	me->fp = LYOpenTemp(fnam, suffix, BIN_W);
+    }
+
+    if (!me->fp) {
+	HTAlert(CANNOT_OPEN_TEMP);
+	FREE(me);
+	return NULL;
+    }
+
+    StrAllocCopy(me->viewer_command, pres->command);
+    /*
+     * Make command to process file.
+     */
+    me->end_command = mailcap_substitute(anchor, pres, fnam);
+
+    /*
+     * Make command to delete file.
+     */
+    me->remove_command = NULL;
+    HTAddParam(&(me->remove_command), REMOVE_COMMAND, 1, fnam);
+    HTEndParam(&(me->remove_command), REMOVE_COMMAND, 1);
+
+    StrAllocCopy(anchor->FileCache, fnam);
+    return me;
+}
+
+/*	Format Converter using system command
+ *	-------------------------------------
+ */
+
+/* @@@@@@@@@@@@@@@@@@@@@@ */
+
+/*	Save to a local file   LJM!!!
+ *	--------------------
+ *
+ *	usually a binary file that can't be displayed
+ *
+ *	originally from Ghostview handling by Marc Andreseen.
+ *	Asks the user if he wants to continue, creates a temporary
+ *	file, and writes to it.  In HTSaveToFile_Free
+ *	the user will see a list of choices for download
+ */
+HTStream *HTSaveToFile(HTPresentation *pres,
+		       HTParentAnchor *anchor,
+		       HTStream *sink)
+{
+    HTStream *ret_obj;
+    char fnam[LY_MAXPATH];
+    const char *suffix;
+    char *cp;
+    int c = 0;
+
+#ifdef VMS
+    BOOL IsBinary = TRUE;
+#endif
+
+    ret_obj = typecalloc(HTStream);
+
+    if (ret_obj == NULL)
+	outofmem(__FILE__, "HTSaveToFile");
+
+    ret_obj->isa = &HTFWriter;
+    ret_obj->remove_command = NULL;
+    ret_obj->end_command = NULL;
+    ret_obj->input_format = pres->rep;
+    ret_obj->output_format = pres->rep_out;
+    ret_obj->anchor = anchor;
+    ret_obj->sink = sink;
+
+    if (dump_output_immediately) {
+	ret_obj->fp = stdout;	/* stdout */
+	if (HTOutputFormat == WWW_DOWNLOAD)
+	    goto Prepend_BASE;
+	return ret_obj;
+    }
+
+    LYCancelDownload = FALSE;
+    if (HTOutputFormat != WWW_DOWNLOAD) {
+	if (traversal ||
+	    (no_download && !override_no_download && no_disk_save)) {
+	    if (!traversal) {
+		HTAlert(CANNOT_DISPLAY_FILE);
+	    }
+	    LYCancelDownload = TRUE;
+	    if (traversal)
+		LYCancelledFetch = TRUE;
+	    FREE(ret_obj);
+	    return (NULL);
+	}
+
+	if (((cp = StrChr(pres->rep->name, ';')) != NULL) &&
+	    strstr((cp + 1), "charset") != NULL) {
+	    _user_message(MSG_DOWNLOAD_OR_CANCEL, pres->rep->name);
+	} else if (*(pres->rep->name) != '\0') {
+	    _user_message(MSG_DOWNLOAD_OR_CANCEL, pres->rep->name);
+	} else {
+	    _statusline(CANNOT_DISPLAY_FILE_D_OR_C);
+	}
+
+	while (c != 'D' && c != 'C' && !LYCharIsINTERRUPT(c)) {
+	    c = LYgetch_single();
+#ifdef VMS
+	    /*
+	     * 'C'ancel on Control-C or Control-Y and
+	     * a 'N'o to the "really exit" query.  - FM
+	     */
+	    if (HadVMSInterrupt) {
+		HadVMSInterrupt = FALSE;
+		c = 'C';
+	    }
+#endif /* VMS */
+	}
+
+	/*
+	 * Cancel on 'C', 'c' or Control-G or Control-C.
+	 */
+	if (c == 'C' || LYCharIsINTERRUPT(c)) {
+	    _statusline(CANCELLING_FILE);
+	    LYCancelDownload = TRUE;
+	    FREE(ret_obj);
+	    return (NULL);
+	}
+    }
+
+    /*
+     * Set up a 'D'ownload.
+     */
+    if (LYCachedTemp(fnam, &(anchor->FileCache))) {
+	/* This used to be LYNewBinFile(fnam); changed to a different call so
+	 * that the open fp gets registered in the list keeping track of temp
+	 * files, equivalent to when LYOpenTemp() gets called below.  This
+	 * avoids a file descriptor leak caused by LYCloseTempFP() not being
+	 * able to find the fp.  The binary suffix is expected to not be used,
+	 * it's only for fallback in unusual error cases.  - kw
+	 */
+	ret_obj->fp = LYOpenTempRewrite(fnam, BIN_SUFFIX, BIN_W);
+    } else {
+	/*
+	 * Check for a suffix.
+	 * Save the file under a suitably suffixed name.
+	 */
+	if (!strcasecomp(pres->rep->name, STR_HTML)) {
+	    suffix = HTML_SUFFIX;
+	} else if (!strncasecomp(pres->rep->name, "text/", 5)) {
+	    suffix = TEXT_SUFFIX;
+	} else if (!strncasecomp(pres->rep->name, "application/", 12)) {
+	    suffix = BIN_SUFFIX;
+	} else if ((suffix = HTFileSuffix(pres->rep,
+					  anchor->content_encoding)) == 0
+		   || *suffix != '.') {
+	    suffix = HTML_SUFFIX;
+	}
+	ret_obj->fp = LYOpenTemp(fnam, suffix, BIN_W);
+    }
+
+    if (!ret_obj->fp) {
+	HTAlert(CANNOT_OPEN_OUTPUT);
+	FREE(ret_obj);
+	return NULL;
+    }
+
+    if (0 == strncasecomp(pres->rep->name, "text/", 5) ||
+	0 == strcasecomp(pres->rep->name, "application/postscript") ||
+	0 == strcasecomp(pres->rep->name, "application/x-RUNOFF-MANUAL"))
+	/*
+	 * It's a text file requested via 'd'ownload.  Keep adding others to
+	 * the above list, 'til we add a configurable procedure.  - FM
+	 */
+#ifdef VMS
+	IsBinary = FALSE;
+#endif
+
+    /*
+     * Any "application/foo" or other non-"text/foo" types that are actually
+     * text but not checked, above, will be treated as binary, so show the type
+     * to help sort that out later.  Unix folks don't need to know this, but
+     * we'll show it to them, too.  - FM
+     */
+    HTInfoMsg2(CONTENT_TYPE_MSG, pres->rep->name);
+
+    StrAllocCopy(WWW_Download_File, fnam);
+
+    /*
+     * Make command to delete file.
+     */
+    ret_obj->remove_command = NULL;
+    HTAddParam(&(ret_obj->remove_command), REMOVE_COMMAND, 1, fnam);
+    HTEndParam(&(ret_obj->remove_command), REMOVE_COMMAND, 1);
+
+#ifdef VMS
+    if (IsBinary && UseFixedRecords) {
+	StrAllocCopy(ret_obj->end_command, "SaveVMSBinaryFile");
+	FIXED_RECORD_COMMAND = 0;
+	HTAddParam(&FIXED_RECORD_COMMAND, FIXED_RECORD_COMMAND_MASK, 1, fnam);
+	HTEndParam(&FIXED_RECORD_COMMAND, FIXED_RECORD_COMMAND_MASK, 1);
+
+    } else {
+#endif /* VMS */
+	StrAllocCopy(ret_obj->end_command, "SaveToFile");
+#ifdef VMS
+    }
+#endif /* VMS */
+
+    _statusline(RETRIEVING_FILE);
+
+    StrAllocCopy(anchor->FileCache, fnam);
+  Prepend_BASE:
+    if (LYPrependBaseToSource &&
+	!strncasecomp(pres->rep->name, STR_HTML, 9) &&
+	!anchor->content_encoding) {
+	/*
+	 * Add the document's base as a BASE tag at the top of the file, so
+	 * that any partial or relative URLs within it will be resolved
+	 * relative to that if no BASE tag is present and replaces it.  Note
+	 * that the markup will be technically invalid if a DOCTYPE
+	 * declaration, or HTML or HEAD tags, are present, and thus the file
+	 * may need editing for perfection.  - FM
+	 *
+	 * Add timestamp (last reload).
+	 */
+	char *temp = NULL;
+
+	if (non_empty(anchor->content_base)) {
+	    StrAllocCopy(temp, anchor->content_base);
+	} else if (non_empty(anchor->content_location)) {
+	    StrAllocCopy(temp, anchor->content_location);
+	}
+	if (temp) {
+	    LYRemoveBlanks(temp);
+	    if (!is_url(temp)) {
+		FREE(temp);
+	    }
+	}
+
+	fprintf(ret_obj->fp,
+		"<!-- X-URL: %s -->\n", anchor->address);
+	if (non_empty(anchor->date)) {
+	    fprintf(ret_obj->fp,
+		    "<!-- Date: %s -->\n", anchor->date);
+	    if (non_empty(anchor->last_modified)
+		&& strcmp(anchor->last_modified, anchor->date)
+		&& strcmp(anchor->last_modified,
+			  "Thu, 01 Jan 1970 00:00:01 GMT")) {
+		fprintf(ret_obj->fp,
+			"<!-- Last-Modified: %s -->\n", anchor->last_modified);
+	    }
+	}
+	fprintf(ret_obj->fp,
+		"<BASE HREF=\"%s\">\n\n", (temp ? temp : anchor->address));
+	FREE(temp);
+    }
+    if (LYPrependCharsetToSource &&
+	!strncasecomp(pres->rep->name, STR_HTML, 9) &&
+	!anchor->content_encoding) {
+	/*
+	 * Add the document's charset as a META CHARSET tag at the top of the
+	 * file, so HTTP charset header will not be forgotten when a document
+	 * saved as local file.  We add this line only(!) if HTTP charset
+	 * present.  - LP Note that the markup will be technically invalid if a
+	 * DOCTYPE declaration, or HTML or HEAD tags, are present, and thus the
+	 * file may need editing for perfection.  - FM
+	 */
+	char *temp = NULL;
+
+	if (non_empty(anchor->charset)) {
+	    StrAllocCopy(temp, anchor->charset);
+	    LYRemoveBlanks(temp);
+	    fprintf(ret_obj->fp,
+		    "<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"" STR_HTML
+		    "; charset=%s\">\n\n",
+		    temp);
+	}
+	FREE(temp);
+    }
+    return ret_obj;
+}
+
+/*	Set up stream for uncompressing - FM
+ *	-------------------------------
+ */
+HTStream *HTCompressed(HTPresentation *pres,
+		       HTParentAnchor *anchor,
+		       HTStream *sink)
+{
+    HTStream *me;
+    HTFormat format;
+    char *type = NULL;
+    HTPresentation *Pres = NULL;
+    HTPresentation *Pnow = NULL;
+    int n, i;
+    BOOL can_present = FALSE;
+    char fnam[LY_MAXPATH];
+    char temp[LY_MAXPATH];	/* actually stores just a suffix */
+    const char *suffix;
+    char *uncompress_mask = NULL;
+    const char *compress_suffix = "";
+    const char *middle;
+
+    /*
+     * Deal with any inappropriate invocations of this function, or a download
+     * request, in which case we won't bother to uncompress the file.  - FM
+     */
+    if (!(anchor->content_encoding && anchor->content_type)) {
+	/*
+	 * We have no idea what we're dealing with, so treat it as a binary
+	 * stream.  - FM
+	 */
+	format = HTAtom_for(STR_BINARY);
+	me = HTStreamStack(format, pres->rep_out, sink, anchor);
+	return me;
+    }
+    n = HTList_count(HTPresentations);
+    for (i = 0; i < n; i++) {
+	Pnow = (HTPresentation *) HTList_objectAt(HTPresentations, i);
+	if (!strcasecomp(Pnow->rep->name, anchor->content_type) &&
+	    Pnow->rep_out == WWW_PRESENT) {
+	    const char *program = "";
+
+	    /*
+	     * Pick the best presentation.  User-defined mappings are at the
+	     * end of the list, and unless the quality is lower, we prefer
+	     * those.
+	     */
+	    if (Pres == 0)
+		Pres = Pnow;
+	    else if (Pres->quality > Pnow->quality)
+		continue;
+	    else
+		Pres = Pnow;
+	    /*
+	     * We have a presentation mapping for it.  - FM
+	     */
+	    can_present = TRUE;
+	    switch (HTEncodingToCompressType(anchor->content_encoding)) {
+	    case cftGzip:
+		if ((program = HTGetProgramPath(ppGZIP)) != NULL) {
+		    /*
+		     * It's compressed with the modern gzip.  - FM
+		     */
+		    StrAllocCopy(uncompress_mask, program);
+		    StrAllocCat(uncompress_mask, " -d --no-name %s");
+		    compress_suffix = "gz";
+		}
+		break;
+	    case cftDeflate:
+		if ((program = HTGetProgramPath(ppINFLATE)) != NULL) {
+		    /*
+		     * It's compressed with a zlib wrapper.
+		     */
+		    StrAllocCopy(uncompress_mask, program);
+		    StrAllocCat(uncompress_mask, " %s");
+		    compress_suffix = "zz";
+		}
+		break;
+	    case cftBzip2:
+		if ((program = HTGetProgramPath(ppBZIP2)) != NULL) {
+		    StrAllocCopy(uncompress_mask, program);
+		    StrAllocCat(uncompress_mask, " -d %s");
+		    compress_suffix = "bz2";
+		}
+		break;
+	    case cftBrotli:
+		if ((program = HTGetProgramPath(ppBROTLI)) != NULL) {
+		    StrAllocCopy(uncompress_mask, program);
+		    StrAllocCat(uncompress_mask, " -j -d %s");
+		    compress_suffix = "br";
+		}
+		break;
+	    case cftCompress:
+		if ((program = HTGetProgramPath(ppUNCOMPRESS)) != NULL) {
+		    /*
+		     * It's compressed the old fashioned Unix way.  - FM
+		     */
+		    StrAllocCopy(uncompress_mask, program);
+		    StrAllocCat(uncompress_mask, " %s");
+		    compress_suffix = "Z";
+		}
+		break;
+	    case cftNone:
+		break;
+	    }
+	}
+    }
+    if (can_present == FALSE ||	/* no presentation mapping */
+	uncompress_mask == NULL ||	/* not gzip or compress */
+	StrChr(anchor->content_type, ';') ||	/* wrong charset */
+	HTOutputFormat == WWW_DOWNLOAD ||	/* download */
+	!strcasecomp(pres->rep_out->name, STR_DOWNLOAD) ||	/* download */
+	(traversal &&		/* only handle html or plain text for traversals */
+	 strcasecomp(anchor->content_type, STR_HTML) &&
+	 strcasecomp(anchor->content_type, STR_PLAINTEXT))) {
+	/*
+	 * Cast the Content-Encoding to a Content-Type and pass it back to be
+	 * handled as that type.  - FM
+	 */
+	if (StrChr(anchor->content_encoding, '/') == NULL) {
+	    /*
+	     * Use "x-" prefix, none of the types we are likely to construct
+	     * here are official.  That is we generate "application/x-gzip" and
+	     * so on.  - kw
+	     */
+	    if (!strncasecomp(anchor->content_encoding, "x-", 2))
+		StrAllocCopy(type, "application/");
+	    else
+		StrAllocCopy(type, "application/x-");
+	    StrAllocCat(type, anchor->content_encoding);
+	} else {
+	    StrAllocCopy(type, anchor->content_encoding);
+	}
+	format = HTAtom_for(type);
+	FREE(type);
+	FREE(uncompress_mask);
+	me = HTStreamStack(format, pres->rep_out, sink, anchor);
+	return me;
+    }
+
+    /*
+     * Set up the stream structure for uncompressing and then handling based on
+     * the uncompressed Content-Type.- FM
+     */
+    me = typecalloc(HTStream);
+    if (me == NULL)
+	outofmem(__FILE__, "HTCompressed");
+
+    me->isa = &HTFWriter;
+    me->input_format = pres->rep;
+    me->output_format = pres->rep_out;
+    me->anchor = anchor;
+    me->sink = sink;
+#ifdef FNAMES_8_3
+    me->idash = FALSE;
+#endif
+
+    /*
+     * Remove any old versions of the file.  - FM
+     */
+    if (anchor->FileCache) {
+	(void) LYRemoveTemp(anchor->FileCache);
+	FREE(anchor->FileCache);
+    }
+
+    /*
+     * Get a new temporary filename and substitute a suitable suffix.  - FM
+     */
+    middle = NULL;
+    if (!strcasecomp(anchor->content_type, STR_HTML)) {
+	middle = HTML_SUFFIX;
+	middle++;		/* point to 'h' of .htm(l) - kw */
+    } else if (!strncasecomp(anchor->content_type, "text/", 5)) {
+	middle = &TEXT_SUFFIX[1];
+    } else if (!strncasecomp(anchor->content_type, "application/", 12)) {
+	/* FIXME: why is this BEFORE HTFileSuffix? */
+	middle = &BIN_SUFFIX[1];
+    } else if ((suffix =
+		HTFileSuffix(HTAtom_for(anchor->content_type), NULL)) &&
+	       *suffix == '.') {
+#if defined(VMS) || defined(FNAMES_8_3)
+	if (StrChr(suffix + 1, '.') == NULL)
+#endif
+	    middle = suffix + 1;
+    }
+
+    temp[0] = 0;		/* construct the suffix */
+    if (middle) {
+#ifdef FNAMES_8_3
+	me->idash = TRUE;	/* remember position of '-'  - kw */
+	strcat(temp, "-");	/* NAME-htm,  NAME-txt, etc. - hack for DOS */
+#else
+	strcat(temp, ".");	/* NAME.html, NAME-txt etc. */
+#endif /* FNAMES_8_3 */
+	strcat(temp, middle);
+#ifdef VMS
+	strcat(temp, "-");	/* NAME.html-gz, NAME.txt-gz, NAME.txt-Z etc. */
+#else
+	strcat(temp, ".");	/* NAME-htm.gz (DOS), NAME.html.gz (UNIX)etc. */
+#endif /* VMS */
+    }
+    strcat(temp, compress_suffix);
+
+    /*
+     * Open the file for receiving the compressed input stream.  - FM
+     */
+    me->fp = LYOpenTemp(fnam, temp, BIN_W);
+    if (!me->fp) {
+	HTAlert(CANNOT_OPEN_TEMP);
+	FREE(uncompress_mask);
+	FREE(me);
+	return NULL;
+    }
+
+    /*
+     * me->viewer_command will be NULL if the converter Pres found above is not
+     * for an external viewer but an internal HTStream converter.  We also
+     * don't set it under conditions where HTSaveAndExecute would disallow
+     * execution of the command.  - KW
+     */
+    if (!dump_output_immediately && !traversal
+#if defined(EXEC_LINKS) || defined(EXEC_SCRIPTS)
+	&& (Pres->quality < 999.0 ||
+	    (!no_exec &&	/* allowed exec link or script ? */
+	     (local_exec ||
+	      (local_exec_on_local_files &&
+	       (LYJumpFileURL ||
+		!StrNCmp(anchor->address, "file://localhost", 16))))))
+#endif /* EXEC_LINKS || EXEC_SCRIPTS */
+	) {
+	StrAllocCopy(me->viewer_command, Pres->command);
+    }
+
+    /*
+     * Make command to process file.  - FM
+     */
+#ifdef USE_BROTLI
+    if (compress_suffix[0] == 'b'	/* e.g., ".br" */
+	&& compress_suffix[1] == 'r'
+	&& !me->viewer_command) {
+	/*
+	 * We won't call brotli externally, so we don't need to supply a
+	 * command for it.
+	 */
+	StrAllocCopy(me->end_command, "");
+    } else
+#endif
+#ifdef USE_BZLIB
+	if (compress_suffix[0] == 'b'	/* must be bzip2 */
+	    && compress_suffix[1] == 'z'
+	    && !me->viewer_command) {
+	/*
+	 * We won't call bzip2 externally, so we don't need to supply a command
+	 * for it.
+	 */
+	StrAllocCopy(me->end_command, "");
+    } else
+#endif
+#ifdef USE_ZLIB
+	/* FIXME: allow deflate here, e.g., 'z' */
+	if (compress_suffix[0] == 'g'	/* must be gzip */
+	    && !me->viewer_command) {
+	/*
+	 * We won't call gzip or compress externally, so we don't need to
+	 * supply a command for it.
+	 */
+	StrAllocCopy(me->end_command, "");
+    } else
+#endif /* USE_ZLIB */
+    {
+	me->end_command = NULL;
+	HTAddParam(&(me->end_command), uncompress_mask, 1, fnam);
+	HTEndParam(&(me->end_command), uncompress_mask, 1);
+    }
+    FREE(uncompress_mask);
+
+    /*
+     * Make command to delete file.  - FM
+     */
+    me->remove_command = NULL;
+    HTAddParam(&(me->remove_command), REMOVE_COMMAND, 1, fnam);
+    HTEndParam(&(me->remove_command), REMOVE_COMMAND, 1);
+
+    /*
+     * Save the filename and return the structure.  - FM
+     */
+    StrAllocCopy(anchor->FileCache, fnam);
+    return me;
+}
+
+/*	Dump output to stdout - LJM & FM
+ *	---------------------
+ *
+ */
+HTStream *HTDumpToStdout(HTPresentation *pres GCC_UNUSED,
+			 HTParentAnchor *anchor,
+			 HTStream *sink GCC_UNUSED)
+{
+    HTStream *ret_obj;
+
+    ret_obj = typecalloc(HTStream);
+
+    if (ret_obj == NULL)
+	outofmem(__FILE__, "HTDumpToStdout");
+
+    ret_obj->isa = &HTFWriter;
+    ret_obj->remove_command = NULL;
+    ret_obj->end_command = NULL;
+    ret_obj->anchor = anchor;
+
+    ret_obj->fp = stdout;	/* stdout */
+    return ret_obj;
+}
+
+#if defined(VMS) && !defined(USE_COMMAND_FILE)
+#include <fab.h>
+#include <rmsdef.h>		/* RMS status codes */
+#include <iodef.h>		/* I/O function codes */
+#include <fibdef.h>		/* file information block defs */
+#include <atrdef.h>		/* attribute request codes */
+#ifdef NOTDEFINED /*** Not all versions of VMS compilers have these.	 ***/
+#include <fchdef.h>		/* file characteristics */
+#include <fatdef.h>		/* file attribute defs */
+#else		  /*** So we'll define what we need from them ourselves. ***/
+#define FCH$V_CONTIGB	0x005	/* pos of cont best try bit */
+#define FCH$M_CONTIGB	(1 << FCH$V_CONTIGB)	/* contig best try bit mask */
+/* VMS I/O User's Reference Manual: Part I (V5.x doc set) */
+struct fatdef {
+    unsigned char fat$b_rtype, fat$b_rattrib;
+    unsigned short fat$w_rsize;
+    unsigned long fat$l_hiblk, fat$l_efblk;
+    unsigned short fat$w_ffbyte;
+    unsigned char fat$b_bktsize, fat$b_vfcsize;
+    unsigned short fat$w_maxrec, fat$w_defext, fat$w_gbc;
+    unsigned:16,:32,:16;	/* 6 bytes reserved, 2 bytes not used */
+    unsigned short fat$w_versions;
+};
+#endif /* NOTDEFINED */
+
+/* arbitrary descriptor without type and class info */
+typedef struct dsc {
+    unsigned short len, mbz;
+    void *adr;
+} Desc;
+
+extern unsigned long sys$open(), sys$qiow(), sys$dassgn();
+
+#define syswork(sts)	((sts) & 1)
+#define sysfail(sts)	(!syswork(sts))
+
+/*
+ * 25-Jul-1995 - Pat Rankin (rankin@eql.caltech.edu)
+ *
+ * Force a file to be marked as having fixed-length, 512 byte records
+ * without implied carriage control, and with best_try_contiguous set.
+ */
+static unsigned long LYVMS_FixedLengthRecords(char *filename)
+{
+    struct FAB fab;		/* RMS file access block */
+    struct fibdef fib;		/* XQP file information block */
+    struct fatdef recattr;	/* XQP file "record" attributes */
+    struct atrdef attr_rqst_list[3];	/* XQP attribute request itemlist */
+
+    Desc fib_dsc;
+    unsigned short channel, iosb[4];
+    unsigned long fchars, sts, tmp;
+
+    /* initialize file access block */
+    fab = cc$rms_fab;
+    fab.fab$l_fna = filename;
+    fab.fab$b_fns = (unsigned char) strlen(filename);
+    fab.fab$l_fop = FAB$M_UFO;	/* user file open; no further RMS processing */
+    fab.fab$b_fac = FAB$M_PUT;	/* need write access */
+    fab.fab$b_shr = FAB$M_NIL;	/* exclusive access */
+
+    sts = sys$open(&fab);	/* channel in stv; $dassgn to close */
+    if (sts == RMS$_FLK) {
+	/* For MultiNet, at least, if the file was just written by a remote
+	   NFS client, the local NFS server might still have it open, and the
+	   failed access attempt will provoke it to be closed, so try again. */
+	sts = sys$open(&fab);
+    }
+    if (sysfail(sts))
+	return sts;
+
+    /* RMS supplies a user-mode channel (see FAB$L_FOP FAB$V_UFO doc) */
+    channel = (unsigned short) fab.fab$l_stv;
+
+    /* set up ACP interface structures */
+    /* file information block, passed by descriptor; it's okay to start with
+       an empty FIB after RMS has accessed the file for us */
+    fib_dsc.len = sizeof fib;
+    fib_dsc.mbz = 0;
+    fib_dsc.adr = &fib;
+    memset((void *) &fib, 0, sizeof fib);
+    /* attribute request list */
+    attr_rqst_list[0].atr$w_size = sizeof recattr;
+    attr_rqst_list[0].atr$w_type = ATR$C_RECATTR;
+    *(void **) &attr_rqst_list[0].atr$l_addr = (void *) &recattr;
+    attr_rqst_list[1].atr$w_size = sizeof fchars;
+    attr_rqst_list[1].atr$w_type = ATR$C_UCHAR;
+    *(void **) &attr_rqst_list[1].atr$l_addr = (void *) &fchars;
+    attr_rqst_list[2].atr$w_size = attr_rqst_list[2].atr$w_type = 0;
+    attr_rqst_list[2].atr$l_addr = 0;
+    /* file "record" attributes */
+    memset((void *) &recattr, 0, sizeof recattr);
+    fchars = 0;			/* file characteristics */
+
+    /* get current attributes */
+    sts = sys$qiow(0, channel, IO$_ACCESS, iosb, (void (*)()) 0, 0,
+		   &fib_dsc, 0, 0, 0, attr_rqst_list, 0);
+    if (syswork(sts))
+	sts = iosb[0];
+
+    /* set desired attributes */
+    if (syswork(sts)) {
+	recattr.fat$b_rtype = FAB$C_SEQ | FAB$C_FIX;	/* org=seq, rfm=fix */
+	recattr.fat$w_rsize = recattr.fat$w_maxrec = 512;	/* lrl=mrs=512 */
+	recattr.fat$b_rattrib = 0;	/* rat=none */
+	fchars |= FCH$M_CONTIGB;	/* contiguous-best-try */
+	sts = sys$qiow(0, channel, IO$_DEACCESS, iosb, (void (*)()) 0, 0,
+		       &fib_dsc, 0, 0, 0, attr_rqst_list, 0);
+	if (syswork(sts))
+	    sts = iosb[0];
+    }
+
+    /* all done */
+    tmp = sys$dassgn(channel);
+    if (syswork(sts))
+	sts = tmp;
+    return sts;
+}
+#endif /* VMS && !USE_COMMAND_FILE */