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LINUXÄÚºËÖÐminºÍmaxºêµÄѧϰ

add linux kernel min, max define:
include/linux/kernel.h
/*
 * min()/max() macros that also do
 * strict type-checking.. See the
 * "unnecessary" pointer comparison.
 */
#define min(x,y) \
(__extension__\
({ \
        typeof(x) _x = (x);     \
        typeof(y) _y = (y);     \
        (void) (&_x == &_y);            \
        _x < _y ? _x : _y; })     \
)
#define max(x,y) \
(__extension__\
({ \
        typeof(x) _x = (x);     \
        typeof(y) _y = (y);     \
        (void) (&_x == &_y);            \
        _x > _y ? _x : _y; })     \
)
 
 
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3. ÄǸö__extension__ÊÇʲô¶«¶«£¿ £¨Óеİ汾ûÓÐÕâ¸ö__extension__)
4. (void)(&_x == &_y)ÓÐʲôÓ㬲»ÊÇÍÑÁË¿ã×Ó·ÅÆ¨Ã´
 
 
 
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LinuxÏµĶ¨Ê±Æ÷£ºalarm()Óësetitimer()


LinuxÏµĶ¨Ê±Æ÷ÓÐÁ½ÖÖ£¬ÒÔÏ·ֱð½éÉÜ£º
1¡¢alarm
Èç¹û²»ÒªÇóºÜ¾«È·µÄ»°£¬ÓÃalarm()ºÍsignal()¾Í¹»ÁË
unsigned int alarm(unsigned int seconds)
º¯Êý˵Ã÷: alarm()ÓÃÀ´ÉèÖÃÐźÅSIGALRMÔÚ¾­¹ý²ÎÊýsecondsÖ¸¶¨µÄÃëÊýºó´«Ë͸øÄ¿Ç°µÄ½ø³Ì¡£Èç¹û²ÎÊýsecondsΪ0£¬Ôò֮ǰÉèÖõÄÄÖÖӻᱻȡÏû£¬²¢½«Ê£ÏµÄʱ¼ä·µ»Ø¡£
·µ»ØÖµ: ......

LinuxϱàÒëºÍ°²×°Èí¼þµÄ·½·¨

For all those who are beginners in any linux(ubuntu) find hard to find the package files of their distro and end up in finding an source package(which is either in tar.gz or .gz).. so now people think how to install these source files…..
lets now see how would you be installing source files ......

LinuxÐéÄâ»úÎÞ·¨ÁªÍøµÄÖÕ¼«½â¾ö°ì·¨

ÓÐʱÓöµ½ÈçÏÂÎÊÌâ£¬Íø¿¨ÉÏÓиö²æ£¬ÈκÎÃüÁî¶¼ÎÞ·¨ÐÞ¸´¡£
·¢ÏÖÍø¿¨ºì²æÖ®Ç°ÊÔ¹ýÏÂÃæÃüÁ¿Ï¶¨¶¼²»Ðеġ£
sudo ifconfig eth0 down
sudo ifconfig eth0 up
sudo /etc/init.d/dhcp3-server restart
sudo /etc/init.d/networking restart
ÎÊÌâ½â¾öºÜ¼òµ¥£¬°ÑÈçϵĸ´Ñ¡¿ò¹´Éϼ´¿É£¬ÐéÄâ»ú¿ª» ......

ÔÚLinuxϰ²×°DNW


1. ÏÂÔØLinuxÏÂDNWµÄPC¶ËUSBÇý¶¯ºÍдÈ빤¾ß
ÏÂÔØµØÖ·£ºÒÑÉÏ´«ÖÁCSDN
2. ±àÒëPC¶ËUSBÇý¶¯ºÍдÈ빤¾ß
2.1 ½âѹËõ
$ tar xzvf /path/to/dnw_linux.tgz
dnw_linux/
dnw_linux/secbulk/
dnw_linux/secbulk/Makefile
dnw_linux/secbulk/secbulk.c
dnw_linux/dnw/
dnw_linux/dnw/dnw.c
 
......

ÔÚLinuxÏÂÐ޸Ļ·¾³±äÁ¿PATH

source file :
http://hi.baidu.com/neugraduzyq/blog/item/5602432f6a1a755a4ec22666.html
ÎÒÏëÔÚPATHϼÓÒ»¸ö/tools/binµÄ·¾¶ÓÃexport PATH=$PATH:/tools/binºóÓ¦¸ÃÊǼÓÉÏÈ¥ÁË£¬µ«ÊÇÓà echo $PATH »¹ÊÇÏÔʾµÄÔ­À´µÄ$PATH±äÁ¿µÄÖµ£¬¸Ð¾õÓÃexport PATH=$PATH:/tools/binÖ»ÊÇÔÚÔ­À´µÄ$PATH±äÁ¿ºó¼ÓÁËÒ»¸ö·¾¶µ½µ±Ç°µ ......
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