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FvwmCpp(1) FvwmCpp(1)
NAME
FvwmCpp - the FVWM Cpp pre-processor
SYNOPSIS
FvwmCpp is spawned by fvwm, so no command line invocation will work.
DESCRIPTION
When called, this module will attempt to have /usr/lib/cpp pre-process
the file specified in its invocation, and then have fvwm read the
resulting file.
INVOCATION
FvwmCpp can be invoked by inserting the line 'FvwmCpp' in the .fvwm2rc
file. It can also be called from a menu or mouse binding. If the user
wants his entire .fvwm2rc file pre-processed with FvwmCpp, then fvwm
should be invoked as:
fvwm2 -cmd "FvwmCpp .fvwm2rc"
Some options can be specified on the command line:
-cppopt option
Lets you pass an option to the cpp program. Not really needed
as any unknown options will be passed on automatically.
-cppprog name
Instead of invoking "/usr/lib/cpp", fvwm will invoke name.
-outfile filename
Instead of creating a random unique name for the temporary file
for the preprocessed rc file, this option will let you specify
the name of the temporary file it will create. Please note that
FvwmCpp will attempt to remove this file before writing to it,
so don't point it at anything important even if it has read-only
protection.
-debug Causes the temporary file create by Cpp to be retained. This
file is usually called "/tmp/fvwmrcXXXXXX"
-lock If you want to use this option you need to start FvwmCpp with
ModuleSynchronous. This option causes fvwm to wait that the pre-
process finish and that FvwmCpp asks fvwm to Read the pre-pro-
cessed file before continuing. This may be useful at startup if
you use a session manager as Gnome. Also, this is useful if you
want to process and run a Form in a fvwm function.
-noread
Causes the pre-processed file to be not read by fvwm. Useful to
pre-process a FvwmScript script with FvwmCpp.
CONFIGURATION OPTIONS
FvwmCpp defines some values for use in the pre-processor file:
TWM_TYPE
Always set to "fvwm".
SERVERHOST
The name of the machine running the X Server.
CLIENTHOST
The name of the machine running fvwm.
HOSTNAME
The host name of the machine running fvwm. Generally the same as
CLIENTHOST.
OSTYPE The operating system for CLIENTHOST.
USER The name of the person running fvwm.
HOME The home directory of the person running fvwm.
VERSION
The X11 version.
REVISION
The X11 revision number.
VENDOR The X server vendor.
RELEASE
The X server release number.
SCREEN The screen number.
WIDTH The screen width in pixels.
HEIGHT The screen height in pixels.
X_RESOLUTION
Some distance/pixel measurement for the horizontal direction, I
think.
Y_RESOLUTION
Some distance/pixel measurement for the vertical direction, I
think.
PLANES Number of color planes for the X server display
BITS_PER_RGB
Number of bits in each rgb triplet.
CLASS The X11 default visual class, e.g. PseudoColor.
COLOR Yes or No, Yes if the default visual class is neither StaticGrey
or GreyScale.
FVWM_CLASS
The visual class that fvwm is using, e.g. TrueColor.
FVWM_COLOR
Yes or No, Yes if the FVWM_CLASS is neither StaticGrey or
GreyScale.
FVWM_VERSION
The fvwm version number, ie 2.0
OPTIONS
Some combination of SHAPE, XPM, NO_SAVEUNDERS, and Cpp, as
defined in configure.h at compile time.
FVWM_MODULEDIR
The directory where fvwm looks for .fvwmrc and modules by
default, as determined at compile time.
FVWM_USERDIR
The value of $FVWM_USERDIR.
SESSION_MANAGER
The value of $SESSION_MANAGER. Undefined if this variable is not
set.
EXAMPLE PROLOG
#define TWM_TYPE fvwm
#define SERVERHOST spx20
#define CLIENTHOST grumpy
#define HOSTNAME grumpy
#define OSTYPE SunOS
#define USER nation
#define HOME /local/homes/dsp/nation
#define VERSION 11
#define REVISION 0
#define VENDOR HDS human designed systems, inc. (2.1.2-D)
#define RELEASE 4
#define SCREEN 0
#define WIDTH 1280
#define HEIGHT 1024
#define X_RESOLUTION 3938
#define Y_RESOLUTION 3938
#define PLANES 8
#define BITS_PER_RGB 8
#define CLASS PseudoColor
#define COLOR Yes
#define FVWM_VERSION 2.0 pl 1
#define OPTIONS SHAPE XPM Cpp
#define FVWM_MODULEDIR /local/homes/dsp/nation/modules
#define FVWM_USERDIR /local/homes/dsp/nation/.fvwm2rc.d
#define SESSION_MANAGER local/grumpy:/tmp/.ICE-unix/440,tcp/spx20:1025
BUGS
Module configurations do not become active until fvwm has restarted if
you use FvwmCpp on startup. FvwmCpp creates a temporary file and passes
this to fvwm, so you would have to edit this file too. There are some
problems with comments in your .fvwm2rc file. The comment sign # is
misinterpreted by the preprocessor. This has usually no impact on
functionality but generates annoying warning messages. The sequence /*
is interpreted as the start of a C comment what is probably not what
you want in a filename. You might want to try /?* (for filenames only)
or /\* or "/*" instead. Depending on your preprocessor you may have the
same problem with "//". Macros are not replaced within single (') or
double quotes ( back quotes (`) to circumvent this. Fvwm accepts back
quotes for quoting and at least FvwmButtons does too. The preprocessor
may place a space after a macro substitution, so with
#define MYCOMMAND ls
"Exec "MYCOMMAND" -l"
you might get
"Exec "ls " -l" (two words)
and not
"Exec "ls" -l" (one word).
If you use gcc you can use this invocation to turn off '//' comments:
FvwmCpp -Cppprog '/your/path/to/gcc -C -E -' <filename>
AUTHOR
FvwmCpp is the result of a random bit mutation on a hard disk, presum-
ably a result of a cosmic-ray or some such thing.
3rd Berkeley Distribution 3 July 2001 FvwmCpp(1)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 19 20:02:17 BST 2007
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