how to generate random number in this code? I try use $RANDOM, but the number is still the same. How to improve it?
find . -type f -exec sed -i s/<field name="test/<field name="test$RANDOM/g {} ;
how to generate random number in this code? I try use $RANDOM, but the number is still the same. How to improve it?
find . -type f -exec sed -i s/<field name="test/<field name="test$RANDOM/g {} ;
这是因为,$RANDOM
的援引功能在你管理find
的指挥时,而不是在find
的情况下,代之以其结果。 页: 1
您可以做的是将<代码>-i.部分放在文字中,并将这一文字改为find
。
例如,subst.sh
包括:
#!/bin/bash
r=$RANDOM
sed -i "s/<field name="test/<field name="test${r}/g" $@
之后
find . -type f -exec ./subst.sh {} ;
trick应当做,因为$RANDOM
将随着档案的出现而评估。
(说明一个具体档案中的随机编号仍然相同,但不同档案的随机编号有所不同)。)
您还可以避免以这种“一线”方式制作文字档案:
function FUNCtst() { echo "tst:$1";echo "tst2:$1"; }; export -f FUNCtst; find -exec bash -c FUNCtst {} ;
阁下:
and, no need to create a file!
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