X-Git-Url: https://git.treefish.org/fex.git/blobdiff_plain/cdeb354c4dbb11b683f9f8c5db2861f3dc572c61..refs/heads/master:/doc/concept

diff --git a/doc/concept b/doc/concept
index fde9902..6203c43 100644
--- a/doc/concept
+++ b/doc/concept
@@ -51,7 +51,7 @@ program "fac" (F*EX admin control) or http://YOURFEXSERVER/fac
 
 Alternativly the users can register theirselves with http://YOURFEXSERVER/fur
 (F*EX user registration), if the admin allows them to do so. This is done by
-setting the variables @local_domains and @local_hosts in FEXHOME/lib/fex.ph
+setting the variables @local_domains and @local_hosts in $FEXHOME/lib/fex.ph
 Example:
 
 	@local_hosts = qw(127.0.0.1 10.10.100.0-10.10.255.255);
@@ -146,7 +146,7 @@ and more than once (until expiration date).
 If you want "delay autodelete" to be the default behaviour for all users
 and each transfer then set
 	$autodelete = 'DELAY'; # or 'NO' for no autodelete
-in FEXHOME/lib/fex.ph
+in $FEXHOME/lib/fex.ph
 
 In addition, you can add to the "Recipient(s)" field of the fup CGI:
 ":autodelete=delay" or ":autodelete=no" or ":keep=x" (where x is the number
@@ -193,18 +193,18 @@ The administrator can also forbid a user to fex to any recipient address,
 but the allowed ones with: fac -r USER
 
 
-By standard installation the base directory FEXHOME is the same as the
-login HOME of user fex, but you can move it if you want. FEXHOME is
+By standard installation the base directory $FEXHOME is the same as the
+login HOME of user fex, but you can move it if you want. $FEXHOME is
 determined by the full path of fexsrv as configured in
-/etc/xinetd.d/fex . Change this when you move FEXHOME!
+/etc/xinetd.d/fex . Change this when you move $FEXHOME!
 
 You can also add (name based) virtual hosts with fac.
 
-Do not give write permission to any other user to any file in FEXHOME or
+Do not give write permission to any other user to any file in $FEXHOME or
 below!
 
 
-FEXHOME contains:
+$FEXHOME contains:
 
 	spool/				spool directory and user data
         htdocs/				directory for generic download files
@@ -273,7 +273,7 @@ A registered full F*EX user is identified by the file $spooldir/$from/@
 Only if this file contains his auth-ID this user is able to send files to
 others. Otherwise he is just an unpriviledged recipient.
 
-You can customize the upload CGI fup by editing FEXHOME/lib/fup.pl
+You can customize the upload CGI fup by editing $FEXHOME/lib/fup.pl
 
 Additional directories in spool:
 
@@ -362,13 +362,13 @@ For streaming receiving you can use "fexget -s-" or "wget -O-".
 
 
 fexsrv also can do generic document output (via dop) like a normal web
-server. For this, your files must be under FEXHOME/htdocs and they must
-not have the same name as the CGIs under FEXHOME/cgi-bin, because the CGIs
+server. For this, your files must be under $FEXHOME/htdocs and they must
+not have the same name as the CGIs under $FEXHOME/cgi-bin, because the CGIs
 have priority.
 
 For security reasons, documents to be delivered by dop:
 - the file must be readable by group or world
-- the file must be in FEXHOME/htdocs or a directory specified by @doc_dirs
+- the file must be in $FEXHOME/htdocs or a directory specified by @doc_dirs
 - the filename must not start with a "."
 - the filename must not contain a "@"
 - the filename must not end with "~"
@@ -387,15 +387,23 @@ fexsrv.
 
 *.html files may contain $VARIABLES$ which will be substituted with the
 value of the corresponding environment variable. See example
-$SERVER_ADMIN$ in FEXHOME/htdocs/index.html
+$SERVER_ADMIN$ in $FEXHOME/htdocs/index.html
 
 *.html files may contain <<perl-code>> (even multiline) which will be
-evaluated and its output will be placed in. Same goes for <<<perl-code>>>
-but without output catching.
-See example FEXHOME/htdocs/dynamic.html
-This perl-code must not contain '>>' strings itself!
+evaluated. The output from print and printf statements will be placed
+in. If the perl-code does not end with a ";" then its return value is also
+added to the output.
+
+Same goes for <<<perl-code>>> but without output catching.
+
+This perl-code must not contain ">>" strings itself!
+
+See example $FEXHOME/htdocs/dynamic.html
+
+To chainload external perl-code do not use "require" but "do" statement.
 Pay attention: do not place security relevant data inside << >> because it
-will be delivered to the client if the URL ends with '!'! See example:
+will be delivered to the client if the URL ends with a "!" character, see
+example:
 http://fex.rus.uni-stuttgart.de/index.html
 http://fex.rus.uni-stuttgart.de/index.html!