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Top Forums UNIX for Dummies Questions & Answers Default Environment Variables Post 302175678 by Dave Miller on Friday 14th of March 2008 11:25:08 PM
Old 03-15-2008
Default Environment Variables

I'm using ksh on an AIX system.

I know that env will list the values of environment variables that have been set. How do I find out about other environment variables?

Here's what happened:

I recently took a new job at a competitor. One thing that attracted me to the job, and vice versa, is that the primary business software is from the same vendor, and running on the same type of system.

My problem was, a little shortcut I got used to was missing. At a shell command prompt, hitting esc then k would return the prior command to the command line, editable with vi commands. (FYI: Hit k multiple times to scroll thru recent commands. Hit j to scroll the other way.)

This was missing for days, until I added the following line to my .profile:

EDITOR=vi ; export EDITOR

Simple enough, but I got the idea to add that line out of the blue. I really don't know why I thought to try it, but it REALLY got me wondering if there were any other useful commands and environment variables that I'm unaware of.

Thanks.
 

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load_dat_font(3alleg4)						  Allegro manual					    load_dat_font(3alleg4)

NAME
load_dat_font - Loads a FONT from an Allegro datafile. SYNOPSIS
#include <allegro.h> FONT *load_dat_font(const char *filename, RGB *pal, void *param) DESCRIPTION
Loads a FONT from an Allegro datafile. You can set param parameter to point to an array that holds two strings that identify the font and the palette in the datafile by name. The first string in this list is the name of the font. You can pass NULL here to just load the first font found in the datafile. The second string can be used to specify the name of the palette associated with the font. This is only returned if the pal parameter is not NULL. If you pass NULL for the name of the palette, the last palette found before the font was found is returned. You can also pass NULL for param, which is treated as if you had passed NULL for both strings separately. In this case, the function will simply load the first font it finds from the datafile and the palette that precedes it. For example, suppose you have a datafile named `fonts.dat' with the following contents: FONT FONT_1_DATA FONT FONT_2_DATA FONT FONT_3_DATA PAL FONT_1_PALETTE PAL FONT_2_PALETTE Then the following code will load FONT_1_DATA as a FONT and return FONT_1_PALETTE as the palette: FONT *f; PALETTE pal; char *names[] = { "FONT_1_DATA", "FONT_1_PALETTE" } f = load_dat_font("fonts.dat", pal, names); If instead you want to load the second font, FONT_2, from the datafile, you would use: FONT *f; PALETTE pal; char *names[] = { "FONT_2_DATA", "FONT_2_PALETTE" } f = load_dat_font("fonts.dat", pal, names); If you want to load the third font, but not bother with a palette, use: FONT *f; char *names[] = { "FONT_3_DATA", NULL } f = load_dat_font("fonts.dat", NULL, names); RETURN VALUE
Returns a pointer to the font or NULL on error. Remember that you are responsible for destroying the font when you are finished with it to avoid memory leaks. SEE ALSO
register_font_file_type(3alleg4), load_font(3alleg4) Allegro version 4.4.2 load_dat_font(3alleg4)
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