进行日期时间转换和计算的几个Shell小函数

日期转天数

function date2days {
    echo "$*" | awk '{
        z=int((14-$2)/12); y=$1+4800-z; m=$2+12*z-3;
        j=int((153*m+2)/5)+$3+y*365+int(y/4)-int(y/100)+int(y/400)-2472633;
        print j
    }'
}
date2days `echo "2010-12-16 18:00:00" | sed 's/-/ /g;s/:/ /g'`
           

天数转日期

function days2date {
    echo "$1" | awk '{
        a=$1+2472632; b=int((4*a+3)/146097); c=int((-b*146097)/4)+a;
        d=int((4*c+3)/1461); e=int((-1461*d)/4)+c; m=int((5*e+2)/153);
        dd=-int((153*m+2)/5)+e+1; mm=int(-m/10)*12+m+3; yy=b*100+d-4800+int(m/10);
        printf ("%4d-%02d-%02d\n",yy,mm,dd)
    }'
}
days2date 12080
           

日期转分钟

function date2minutes {
    echo "$*" | awk '{
        z=int((14-$2)/12); y=$1+4800-z; m=$2+12*z-3;
        j=int((153*m+2)/5)+$3+y*365+int(y/4)-int(y/100)+int(y/400)-2472633;
        j=j*1440+$4*60+$5
        print j
    }'
}
date2minutes `echo "2010-12-16 18:00:00" | sed 's/-/ /g;s/:/ /g'`
           

分钟转日期

function minutes2date {
    echo "$1" | awk '{
        i=$1; nn=i%60; i=int(i/60); hh=i%24; dd=int(i/24); i=int(i/24);
        a=i+2472632; b=int((4*a+3)/146097); c=int((-b*146097)/4)+a;
        d=int((4*c+3)/1461); e=int((-1461*d)/4)+c; m=int((5*e+2)/153);
        dd=-int((153*m+2)/5)+e+1; mm=int(-m/10)*12+m+3; yy=b*100+d-4800+int(m/10);
        printf ("%4d-%02d-%02d %02d:%02d\n",yy,mm,dd,hh,nn)
    }'
}
minutes2date 3568545
           

日期转秒数

function date2seconds {
    echo "$*" | awk '{
        z=int((14-$2)/12); y=$1+4800-z; m=$2+12*z-3;
        j=int((153*m+2)/5)+$3+y*365+int(y/4)-int(y/100)+int(y/400)-2472633;
        j=j*86400+$4*3600+$5*60+$6
        print j
    }'
}
date2seconds `echo "2010-12-16 18:00:00" | sed 's/-/ /g;s/:/ /g'`
           

秒数转日期

function seconds2date {
    echo "$1" | awk '{
        i=$1; ss=i%60; i=int(i/60); nn=i%60; i=int(i/60); hh=i%24; dd=int(i/24); i=int(i/24);
        a=i+2472632; b=int((4*a+3)/146097); c=int((-b*146097)/4)+a;
        d=int((4*c+3)/1461); e=int((-1461*d)/4)+c; m=int((5*e+2)/153);
        dd=-int((153*m+2)/5)+e+1; mm=int(-m/10)*12+m+3; yy=b*100+d-4800+int(m/10);
        printf ("%4d-%02d-%02d %02d:%02d:%02d\n",yy,mm,dd,hh,nn,ss)
    }'
}
seconds2date 1234567890
           

日期转毫秒

function date2milliseconds {
    echo "$*" | awk '{
        z=int((14-$2)/12); y=$1+4800-z; m=$2+12*z-3;
        j=int((153*m+2)/5)+$3+y*365+int(y/4)-int(y/100)+int(y/400)-2472633;
        j=j*86400+$4*3600+$5*60+$6
        printf ("%d%s\n",j,$7)
    }'
}
date2milliseconds `echo "2010-12-16 18:00:00.001" | sed 's/-/ /g;s/:/ /g;s/\./ /g'`
           

毫秒转日期

function milliseconds2date {
    echo "$1" | awk '{
        i=$1; ms=i%1000; i=int(i/1000); ss=i%60; i=int(i/60); nn=i%60; i=int(i/60); hh=i%24; dd=int(i/24);
i=int(i/24);
        a=i+2472632; b=int((4*a+3)/146097); c=int((-b*146097)/4)+a;
        d=int((4*c+3)/1461); e=int((-1461*d)/4)+c; m=int((5*e+2)/153);
        dd=-int((153*m+2)/5)+e+1; mm=int(-m/10)*12+m+3; yy=b*100+d-4800+int(m/10);
        printf ("%4d-%02d-%02d %02d:%02d:%02d.%03d\n",yy,mm,dd,hh,nn,ss,ms)
    }'
}
milliseconds2date 1234567890123