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shell脚本echo输出不换行功能增强实例

2024-03-14 08:36:03 490

这是第8/101个脚本

Thereareasmanywaystosolvethisquirkyechoproblemastherearepagesinthisbook.Oneofmyfavoritesisverysuccinct:

functionechon
{
echo"$*"|awk'{printf"%s"$0}'
}

Youmayprefertoavoidtheoverheadincurredwhencallingtheawkcommand,however,andifyouhaveauser-levelcommandcalledprintfyoucanuseitinstead:

echon()
{
printf"%s""$*"
}

Butwhatifyoudon'thaveprintfandyoudon'twanttocallawk?Thenusethetrcommand:

echon()
{
echo"$*"|tr-d'\n'
}

Thismethodofsimplychoppingoutthecarriagereturnwithtrisasimpleandefficientsolutionthatshouldbequiteportable.
这个脚本很简单，就是可以用3种不同的函数（方法）来实现，输出后不换行。