Get Process

Reference:
Technical Q&A QA1123: Getting List of All Processes on Mac OS X

redirect stdout to a file

FILE * fp = fopen(“myfile.txt","w+a") ;
int fd= -1;
if ( fp != NULL ) dup2(fd,1) ; // 1 for stdout
if ( fd < 0 ) return false ; // fail
else return true ; // success
close(fd);
fclose(fp);

to add a launch icon in EeePC

reference:

http://www.weekl.net/blog/?p=12

remember to run /opt/xandros/bin/AsusLauncher
but after you reboot, the new setting doesn’t work.
strange!!

GTK+ z-order problem

GTK+ has no the concept of Z-order with widgets, and is not able to track whether a Window is being obscured. But GTK+ can send expose events to widgets that may not currently be visible.

x11 helper functions — blit frames to the screen

include opengl video

http://www.cs.fsu.edu/~baker/devices/lxr/http/source/xawtv-3.95/x11/blit.c

blit banchmark on each platform

ref:

http://www.rocklyte.com/news_20030917.html

GTK+ important links references

http://www.gtk.org/documentation.html

2d graphic library for Linux GraphicsMagick

it’s a branch of imageMagick 5.xxxx
reference:

http://www.graphicsmagick.org/www/api.html

make file link with dynamic and static libraries

• to build static library

% gcc -c libtest.c -o libtest.o
% ar rcs libtest.a libtest.o

• to build dynamic library

-fPIC option tells gcc to create position independant code which is necessary for shared libraries

% gcc -c -fPIC libtest.c -o libtest.o
% gcc -shared -o libtest.so libtest.o

• to use static library

% gcc -static main.c -L. -ltest -o testStatic

• to use dynamic library

% gcc main.c -L. -ltest -o testDynamic

the source file of application who uses the library ltest, sould be located before -l options
-L<path to search libraries> (no spacing after -L)
-o <output file>
-l<lib_name> (no spacing after -l)

in static link, library name is lib.a ex: libtest.a libcheckitout.a or libxxxx.a

in dynamic link, library start with lib ex: libtest or libtest.so or lib….

gcc [options] -o

to build-up EEE PC’s development environment

1. install debian 4.r3 (2.6.18-6-686) and gtk+2.0 for developing GUI on EEE PC.
2. write down a helloptg as the sample in GTK

#include <gtk/gtk.h>

int main(int argc, char**argv)
{
GtkWidget *window;
gtk_init(&argc, &argv);
window=gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_widget_show(window);
gtk_main();
return 0;
}

3. compiled by :

% gcc -o hellogtk hellogtk.c `pkg-config –cflags –libs gtk+-2.0`

4. copy it to EEE PC.
   change mode to 755
   and run it in console.
   It works.