LinuxÏ c ÅжÏÒ»¸öÎļþÊÇ·ñ´æÔÚ
#include <stdio.h>
#include <unistd.h>
#define FOO "foo"
int main(void)
{
if(!access(FOO, F_OK))
{
if(!unlink(FOO))
{
}
else
{
printf("remove %s failed\n", FOO);
}
}
else
{
printf("%s not existed\n", FOO);
}
return 0;
}
Ïà¹ØÎĵµ£º
1¡¢¼òµ¥²âÊÔʵÀý
for i in `find . -type f -name "*.c"`
do
echo $i
basename $i »ñÈ¡*.cÎļþÃû
dirname $i »ñÈ¡*.c¶ÔÓ¦µÄĿ¼Ãû
done
2¡¢Êµ¼ÊÓ¦ÓÃ
diff LinuxÔ´Â룬²¢½«Óв»Ò»ÑùµÄÔ´ÂëÕûÀíÔÚÒ»Æð£¬ÒªÇó£ºÎļþ ......
ÍøÉÏÕÒÁ˺ܶ࣬Õâ¸ö×îÓÐЧ£¬×ªÔØÏÂ
ÏÂÔØ³É¹¦ºóÉÏ´«ÖÁ·þÎñÆ÷ÈÎÒâĿ¼
2. ÔÚµ±Ç°Ä¿Â¼ÊäÈë
sh jdk-6u2-linux-i586-rpm.bin
3.¿´µ½ °²×°³ÌÐòÔÚѯÎÊÄúÊÇ·ñ×ðÊØÐí¿ÉÐÒéÒ³Ãæ ,»Ø³µ ......
¡¡¡¡ÄãÏë³ÉÖªµÀÈçºÎ³ÉΪһ¸öLinuxÄں˿ª·¢Õßô£¿»òÕßÄãµÄÀÏ°å¸æËßÄ㣬“ȥΪÕâ¸öÉ豸дһ¸öLinuxÇý¶¯¡£“ÕâÆªÎĵµµÄÄ¿µÄ£¬¾ÍÊÇͨ¹ýÃèÊöÄãÐèÒª¾ÀúµÄ¹ý³ÌºÍÌáʾÄãÈçºÎºÍÉçÇøÒ»Æð¹¤×÷£¬À´½Ì¸øÄãΪ´ïµ½ÕâЩĿµÄËùÐèÒªÖªµÀµÄËùÓÐ֪ʶ¡£±¾ÎÄÒ²³¢ÊÔ½âÊÍÉçÇøÎªÊ²Ã´ÕâÑù¹¤×÷µÄһЩÔÒò¡£
¡¡¡¡Äں˼¸ºõÈ«ÊÇÓÃCд³ÉµÄ£¬ÓÐ ......
inux±ØÑ§µÄ60¸öÃüÁî
LinuxÌṩÁË´óÁ¿µÄÃüÁÀûÓÃËü¿ÉÒÔÓÐЧµØÍê³É´óÁ¿µÄ¹¤×÷£¬Èç´ÅÅ̲Ù×÷¡¢Îļþ´æÈ¡¡¢Ä¿Â¼²Ù×÷¡¢½ø³Ì¹ÜÀí¡¢ÎļþȨÏÞÉ趨µÈ¡£ËùÒÔ£¬ÔÚLinuxϵͳÉϹ¤×÷Àë²»¿ªÊ¹ÓÃϵͳÌṩµÄÃüÁî¡£ÒªÏëÕæÕýÀí½âLinuxϵͳ£¬¾Í±ØÐë´ÓLinuxÃüÁîѧÆð£¬Í¨¹ý»ù´¡µÄÃüÁîѧϰ¿ÉÒÔ½øÒ»²½Àí½âLinuxϵͳ¡£
²»Í¬Linux·¢ÐаæµÄÃüÁîÊýÁ¿² ......
Áù£ºkmem_cache_allocµÄʵÏÖ·ÖÎö:
ÎÒÃÇÔÚÉÏÃæ¿ÉÒÔ¿´µ½£¬´´½¨Ò»¸öcacheÃèÊö·ûµÄʱºò£¬²¢Ã»ÓÐÕâÖ®·ÖÅäslabÊý¾Ý¡£ÏÖÔÚÎÒÃÇÀ´¿´Ò»ÏÂÔõô´ÓcacheÖÐÉêÇë¶ÔÏó
void * kmem_cache_alloc (kmem_cache_t *cachep, int flags)
{
return __cache_alloc(cachep, flags);
}
ʵ¼ÊÉÏ»áµ÷ÓÃ__cache_allo ......