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fork compare to exec in linux c program

pid_t  pid=fork()
it has 3 situation for the return result pid
0  child
>0 parent process
<0 fork fail
fork create a new process  and it parent live alse when the child process had been created


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Linux Webcam and TV¡¾Linux ÉãÏñÍ· ºÍ µçÊÓ¡¿

 HowTo WebCam On Linux
Five fun ways to use a Linux webcam
http://www.linux.com/archive/articles/126186
The Webcam HOWTO
http://tldp.org/HOWTO/html_single/Webcam-HOWTO/
WebCam under Linux
http://www.seismo.ethz.ch/linux/webcam.html
‘Webcams in Linux, Part 1
http://www.linuxplanet. ......

Linux¹Ø»úÃüÁî

1 shutdown:
[NAME
]  shutdown - bring the system down
SYNOPSIS
       /sbin/shutdown [-t sec] [-arkhncfF] time [warning-message]
DESCRIPTION
       shutdown  brings  the  system  down  in a secure way.&nb ......

LinuxÃüÁî find grep vim²å¼þ

linux find ÃüÁîʹÓÃ
-name Ñ¡Ïî
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$ find . -name "[A-Z]*" -print
ÏëÒªÔÚ/etcĿ¼Öв ......

linux mmapÇý¶¯ÊµÏÖ

ÔÚʵÏÖÇý¶¯³ÌÐòµÄmmapº¯Êýʱ£¬Òª×¢ÒâÓ³É䵨ַµÄת»»ÎÊÌ⣬¼û´úÂë¡£
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struct leedriver
{
struct cdev cdev;
unsigned char mem[MEMSIZE];
};
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ÔÚʵÏÖsimple_remap_mmapº¯Êýʱ£¬´úÂëÈçÏÂ
static int simple_remap_mmap(stru ......
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