Support wildcards in viewable file type extensions (e.g. * and ?)

Now archive.js can be installed as a sort of "fall-through" file viewer (rather than listing all the supported/possible archive extensions as separately viewable file-types):
File Extension        *                
Command Line          ?archive list %f 

src/sbbs3/sbbs.h

@@ -1076,8 +1076,8 @@ public:
 
 	/* viewfile.cpp */
 	int		viewfile(file_t* f, bool extdesc);
-	void	viewfiles(uint dirnum, char *fspec);
-	void	viewfilecontents(file_t* f);
+	bool	viewfile(const char* path);
+	bool	viewfilecontents(file_t* f);
 
 	/* xtrn.cpp */
 	int		external(const char* cmdline, long mode, const char* startup_dir=NULL);

src/sbbs3/scfg/scfgxfr1.c

@@ -209,9 +209,14 @@ void xfer_opts()
 					uifc.helpbuf=
 						"`Viewable File Types:`\n"
 						"\n"
-						"This is a list of file types that have content information that can be\n"
-						"viewed on the Terminal Server through the execution of an external\n"
-						"program."
+						"This is a list of file types (extensions) that have content information\n"
+						"that can be viewed on the Terminal Server through the execution of an\n"
+						"external program or script.\n"
+						"\n"
+						"The file types/extensions are case insensitive and may contain wildcard\n"
+						"characters (i.e. `?` or `*`).\n"
+						"\n"
+						"Specify the filename argument on the command-line with `%s` or `%f`."
 					;
 					i=uifc.list(i,0,0,50,&fview_dflt,&fview_bar,"Viewable File Types",opt);
 					if(i==-1)
@@ -245,8 +250,8 @@ void xfer_opts()
 								continue; 
 							}
 							memset(cfg.fview[0],0,sizeof(fview_t));
-							strcpy(cfg.fview[0]->ext,"ZIP");
-							strcpy(cfg.fview[0]->cmd,"%@unzip -vq %s"); 
+							strcpy(cfg.fview[0]->ext,"*");
+							strcpy(cfg.fview[0]->cmd,"?archive list %f"); 
 						}
 						else {
 							for(j=cfg.total_fviews;j>i;j--)
@@ -464,6 +469,7 @@ void xfer_opts()
 						"\n"
 						"This is a list of file types that will have a command line executed to\n"
 						"perform an event upon their download (e.g. trigger a download event).\n"
+						"\n"
 						"The file types are specified by `extension` and if one file extension\n"
 						"is listed more than once, each command line will be executed. The\n"
 						"command lines must return a error level of 0 (no error) in order\n"
@@ -597,10 +603,11 @@ void xfer_opts()
 					uifc.helpbuf=
 						"`Extractable File Types:`\n"
 						"\n"
-						"This is a list of archive file types that can be extracted to the temp\n"
-						"directory by an external program. The file types are specified by their\n"
-						"extension. For each file type you must specify the command line used to\n"
-						"extract the file(s).\n"
+						"List of external extraction methods available by file type/extension.\n"
+						"\n"
+						"Support for extracting archives of common formats (i.e. `zip`, etc.)\n"
+						"is built-into Synchronet (requires no external program), however may be\n"
+						"extended via external archive/extraction programs configured here."
 					;
 					i=uifc.list(i,0,0,50,&fextr_dflt,&fextr_bar,"Extractable File Types",opt);
 					if(i==-1)
@@ -717,9 +724,11 @@ void xfer_opts()
 					uifc.helpbuf=
 						"`Compressible File Types:`\n"
 						"\n"
-						"This is a list of compression methods available for different file types.\n"
-						"These will be used for items such as creating QWK packets, temporary\n"
-						"files from the transfer section, and more.\n"
+						"List of external compression methods available by file type/extension.\n"
+						"\n"
+						"Support for creating archives of common formats (i.e. `zip`, `7z`, `tgz`, `tbz`)\n"
+						"is built-into Synchronet (requires no external program), however may be\n"
+						"extended via external compression/archive programs configured here."
 					;
 					i=uifc.list(i,0,0,50,&fcomp_dflt,&fcomp_bar,"Compressible File Types",opt);
 					if(i==-1)

src/sbbs3/viewfile.cpp

@@ -85,67 +85,47 @@ int sbbs_t::viewfile(file_t* f, bool ext)
 }
 
 /*****************************************************************************/
-/* View viewable file types from dir 'dirnum'                                */
-/* 'fspec' must be padded                                                    */
 /*****************************************************************************/
-void sbbs_t::viewfiles(uint dirnum, char *fspec)
+bool sbbs_t::viewfile(const char* path)
 {
-	char	tmp[512];
     char	viewcmd[256];
     int		i;
 
-	curdirnum=dirnum;	/* for ARS */
-	SAFEPRINTF2(viewcmd,"%s%s",cfg.dir[dirnum]->path,fspec);
-	if(!fexist(viewcmd)) {
+	if(!fexist(path)) {
 		bputs(text[FileNotFound]);
-		return; 
+		return false; 
 	}
-	char* file_ext = getfext(fspec);
+	char* file_ext = getfext(path);
 	if(file_ext == NULL) {
-		bprintf(text[NonviewableFile], fspec);
-		return; 
+		bprintf(text[NonviewableFile], getfname(path));
+		return false;
 	}
 	for(i=0;i<cfg.total_fviews;i++)
-		if(!stricmp(file_ext + 1, cfg.fview[i]->ext) && chk_ar(cfg.fview[i]->ar,&useron,&client)) {
+		if(wildmatchi(file_ext + 1, cfg.fview[i]->ext, /* path: */false) && chk_ar(cfg.fview[i]->ar,&useron,&client)) {
 			SAFECOPY(viewcmd,cfg.fview[i]->cmd);
 			break;
 		}
-	if(i==cfg.total_fviews) {
+	if(i >= cfg.total_fviews) {
 		bprintf(text[NonviewableFile], file_ext);
-		return; 
+		return false;
 	}
-	SAFEPRINTF2(tmp, "%s%s", cfg.dir[dirnum]->path, fspec);
-	if((i=external(cmdstr(viewcmd,tmp,tmp,NULL),EX_STDIO|EX_SH))!=0)
+	if((i=external(cmdstr(viewcmd, path, path, NULL), EX_STDIO|EX_SH))!=0) {
 		errormsg(WHERE,ERR_EXEC,viewcmd,i);    /* must have EX_SH to ^C */
+		return false;
+	}
+	return true;
 }
 
 /****************************************************************************/
 /****************************************************************************/
-void sbbs_t::viewfilecontents(file_t* f)
+bool sbbs_t::viewfilecontents(file_t* f)
 {
-	char	cmd[128];
 	char	path[MAX_PATH + 1];
-	char* 	ext;
-	int		i;
 
 	getfilepath(&cfg, f, path);
-	if(getfilesize(&cfg, f) < 1) {
-		bprintf(text[FileDoesNotExist], path);
-		return; 
-	}
-	if((ext=getfext(path))!=NULL) {
-		ext++;
-		for(i=0;i<cfg.total_fviews;i++) {
-			if(!stricmp(ext,cfg.fview[i]->ext)
-				&& chk_ar(cfg.fview[i]->ar,&useron,&client)) {
-				SAFECOPY(cmd,cfg.fview[i]->cmd);
-				break; 
-			} 
-		}
-	}
-	if(ext==NULL || i==cfg.total_fviews)
-		bprintf(text[NonviewableFile],ext);
-	else
-		if((i=external(cmdstr(cmd,path,path,NULL),EX_STDIO))!=0)
-			errormsg(WHERE,ERR_EXEC,cmdstr(cmd,path,path,NULL),i);
+	uint savedir = curdirnum;
+	curdirnum = f->dir;	/* for ARS */
+	bool result = viewfile(path);
+	curdirnum = savedir;
+	return result;
 }