用Linux shell 计算两个时间差

start=`date +%s -d "2011-11-28 15:55:37"`

end=`date +%s -d "2011-11-28 15:55:52"`

echo $(($end-$start))

这个前提是你能拿到开始和结束时间字串的基础上的。

如果你的日志文件输出格式是上述的话，还有个方法：

cat 日志文件 | awk '/^000/{

start=$2 " " $3

end=$4 " " $5

stm=mktime(gensub(/[:-]/, " ", "g", start))

etm=mktime(gensub(/[:-]/, " ", "g", end))

print $1 " - " etm-stm

}'

#include <stdio.h>

#include <time.h>

int

main ()

{

struct tm tm, tm2

char buf[255]

time_t t1, t2

strptime ("Thu Feb 5 13:12:18 EST 2009", "%a %b %d %H:%M:%S EST %Y", &tm)

strptime ("Fri Feb 6 13:11:18 EST 2009", "%a %b %d %H:%M:%S EST %Y", &tm2)

t1 = mktime(&tm)

t2 = mktime(&tm2)

printf("TIME: %ld, %ld, %ld\n", t2, t1, t2-t1)

return 0

}

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