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include/linux/time.h

static
inline
unsigned
long
mktime
(
unsigned
int
year,
unsigned
int
mon,
    unsigned
int
day,
unsigned
int
hour,
    unsigned
int
min
,
unsigned
int
sec)
       {
    if
(
0 >
=
(
int
)
(
mon -
=
2)
)
{
/**/
/* 1..12 -> 11,12,1..10 */
         mon +
=
12;
/**/
/* Puts Feb last since it has leap day */
         year -
=
1;
    }
    return
(
(
(
             (
unsigned
long
)
(
year/
4 -
year/
100 +
year/
400 +
367*
mon/
12 +
day)
+
             year*
365 -
719499
          )
*
24 +
hour /**/
/* now have hours */
       )
*
60 +
min
/**/
/* now have minutes */
    )
*
60 +
sec;
/**/
/* finally seconds */
}
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        T = ((X * 24 + hour) * 60 + min) * 60 + sec
    Õâ˵Ã÷¸ÃËã·¨ÊÇÏÈËã³ö´Ó1970Äê1ÔÂ1ÈÕ¿ªÊ¼µÄÌìÊýX£¬ÔÙ½ø¶øÇó³ö¾ßÌåµÄʱ¼äÖµTµÄ¡£
 


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#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <stdio.h>
#include <string>
#include <iostream>
#include <cstring>
using namespace std;
void peek_interfaces(int ......

linux getoptsÃüÁ´¦Àíshell½Å±¾²ÎÊý

#!/bin/bash
while getopts "ab:cd:" Option
# b and d take arguments
#
do
case $Option in
a) echo -e "a = $OPTIND";;
b) echo -e "b = $OPTIND $OPTARG";;
c) echo -e "c = $OPTIND";;
d) echo -e "d = $OPTIND $OPTARG";;
esac
done
shift $(($OPTIND - 1)) ......

linux sock_rawԭʼÌ×½Ó×Ö±à³Ì

from:http://blog.chinaunix.net/u2/62281/showart_1096746.html
sock_rawԭʼÌ×½Ó×Ö±à³Ì¿ÉÒÔ½ÓÊÕµ½±¾»úÍø¿¨ÉϵÄÊý¾ÝÖ¡»òÕßÊý¾Ý°ü,¶ÔÓë¼àÌýÍøÂçµÄÁ÷Á¿ºÍ·ÖÎöÊǺÜÓÐ×÷ÓõÄ.Ò»¹²¿ÉÒÔÓÐ3ÖÖ·½Ê½´´½¨ÕâÖÖsocket
 
1.socket(AF_INET, SOCK_RAW, IPPROTO_TCP|IPPROTO_UDP|IPPROTO_ICMP)·¢ËͽÓÊÕipÊý¾Ý°ü
2.socket(PF_PACK ......

linuxÄں˽ṹÌå

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//By:yuyongbao
//QQ:673360056
LINUX Äں˽ṹÌå
struct attribute
{
    const char    * name;
    struct module     &nb ......

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Linux psÃüÁîÏê½â£º
    1)ps a ÏÔʾÏÖÐÐÖÕ¶Ë»úϵÄËùÓгÌÐò,°üÀ¨ÆäËûÓû§µÄ³ÌÐò.
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