- The added line is THIS COLOR.
- The deleted line is THIS COLOR.
* negative mfs size at large memory [#u8b08276]
- ページ: [[LiveCD/4.4/BTS]]
- 投稿者: [[kaw]]
- 優先順位: 低
- 状: 提案
- 状: 着手
- カテゴリー: malfunction
- 投稿日: 2009-02-26 (木) 09:03:35
- バージョン:
** メッセージ [#z0e47bba]
more than 2^31 bytes are displayed as negative value.
more than 2^31 bytes are displayed as negative value. ~
Because ksh can handle integer range of -2^31 ... 2^31-1
On ksh, this is like this;
$ echo $((2147483647)) # 2^31-1
2147483647
$ echo $((2147483647+1)) # 2^31
-2147483648
Here's a concept code to check two strings representing big non-negative integer values.
#!/bin/ksh
function isgreater {
# check presence of arguments
#
[ $# -lt 2 ] && return -- -1
x=$1
y=$2
# Are arguments both form of positive integer?
#
# !!! INCOMPLETE: not checking correct pattern!!!
#
case "XX${x}YY${y}ZZ" in
XX[0-9]*YY[0-9]*ZZ)
: # ok, do nothing
;;
*)
return -- -2 # ng, string is not positive integer
;;
esac
# Compare it
#
if [ ${#x} -gt ${#y} ]; then
return 0
elif [ ${#x} -eq ${#y} ]; then
if [ $x -gt $y ]; then
return 0
else
return 1
fi
else
return 1
fi
}
isgreater $1 $2
case $? in
0) echo $1 is greater than $2. ;;
1) echo $1 is NOT greater than $2. ;;
*) echo argument format error ;;
esac
Note
-This is needed by very early stage of boot time, so only ksh built-ins can be used.
-Codes marked as "INCOMPLETE" should check either if given two strings both $x and $y match the pattern /^[0-9]+$/ .
--------
#comment