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<hr><p align="left"><small>发信人: plato (纯真年代), 信区: Embedded <br>
标 题: linux for ppc chapter 17 <br>
发信站: BBS 水木清华站 (Wed May 30 23:22:20 2001) <br>
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17. Applications <br>
17.1 Standard GNU tools <br>
Standard GNU tools (such as bash, ls, etc etc) are available in the MontaVis <br>
ta distribution at: ftp://ftp.mvista.com/pub/CDK/1.2/latest/PowerPC. Even if <br>
you are compiling them yourself, you can use the recipe in the %build porti <br>
on of the SPEC files in the SRPMS to help. <br>
17.2 Standalone Shell <br>
Also known as "sash", this is a small standalone shell with minimal versions <br>
of the most useful commands from /bin built in. See: http://www.canb.auug.o <br>
rg.au/~dbell/programs/sash-3.4.tar.gz. <br>
Not to be confused with the CONFIG_SASH configuration option in many kernels <br>
, which starts a shell at bootup with the proper process group settings, so <br>
that signals like interrupt on CTRL-C work. Note that the two are often used <br>
together. <br>
17.3 BusyBox <br>
http://busybox.lineo.com/ <br>
BusyBox combines tiny versions of many common UNIX utilities into a single s <br>
mall executable. It provides minimalist replacements for most of the utiliti <br>
es you usually find in fileutils, shellutils, findutils, textutils, grep, gz <br>
ip, tar, etc. BusyBox provides a fairly complete POSIX environment for any s <br>
mall or embedded system. The utilities in BusyBox generally have fewer optio <br>
ns than their full-featured GNU cousins; however, the options that are inclu <br>
ded provide the expected functionality and behave very much like their GNU c <br>
ounterparts. <br>
Busybox has some problems with 2.4.x Linux kernels. Patches available on req <br>
uest from Denx. <br>
17.4 Web Servers <br>
There are stacks to choose from. Here are just a few, which seem particularl <br>
y well suited to embedded Linux work. Pick the one that has the features you <br>
need. <br>
Go Ahead <br>
http://www.goahead.com/ <br>
The GoAhead embedded web server is part of the Hard Hat Linux distribution. <br>
Boa <br>
http://www.boa.org/ <br>
Boa is a single-tasking HTTP server. That means that unlike traditional web <br>
servers, it does not fork for each incoming connection, nor does it fork man <br>
y copies of itself to handle multiple connections. It internally multiplexes <br>
all of the ongoing HTTP connections, and forks only for CGI programs (which <br>
must be separate processes), automatic directory generation, and automatic <br>
file gunzipping. Preliminary tests show Boa is capable of handling several t <br>
housand hits per second on a 300 MHz Pentium and dozens of hits per second o <br>
n a lowly 20 MHz 386/SX. <br>
thttpd, mini_httpd, micro_httpd <br>
http://www.acme.com/ <br>
A collection of very small web servers, with varying degrees of functionalit <br>
y. <br>
17.5 Graphical User Interface <br>
Microwindows <br>
http://microwindows.censoft.com/ <br>
Microwindows is an Open Source project aimed at bringing the features of mod <br>
ern graphical windowing environments to smaller devices and platforms. It al <br>
lows applications to be built and tested on the Linux desktop, as well as cr <br>
oss-compiled for the target device. <br>
PicoGUI <br>
http://pgui.sourceforge.net/ <br>
A small, portable, client/server GUI designed to work on many types of hardw <br>
are including handheld computers. Includes layout manager and widgets. <br>
17.6 Java Virtual Machine <br>
MontaVista have several JVM solutions for HardHat Linux. <br>
A list of Java virtual machines, some of which are suitable for embedded Pow <br>
erPC systems, is available at: http://www.geocities.com/marcoschmidt.geo/jav <br>
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