shell脚本动画小工具
看gif图:
shell脚本版
脚本内容如下:
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| #!/usr/bin/env bash
## ------------------------------------------------------------ ## Author:博客园——骏马金龙 ## shell scripts:https://www.junmajinlong.com/others/shell_perl_gif ## ------------------------------------------------------------
## Usage:$0 "COMMAND" ## you must enclosing the COMMAND by double-quotes ## example1: $0 "sleep 3;echo haha" ## example2: $0 "service mysql start"
killmyself="pkill -13 -f `basename $0`"
trap "$killmyself" sigint
while true;do for i in '-' "\\" '|' '/';do printf "\r%s" $i sleep 0.2 done done &
bgpid=$!
tmp="`bash -c \"$@\"`" kill $bgpid printf "\r%s\n" "$tmp" $killmyself
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必须将待运行的命令放进引号中包围,并作为脚本的参数。
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| ## example1: $0 "sleep 3;echo haha" ## example2: $0 "service mysql start" ## example3: $0 "service mysql stop"
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perl版
下面是用perl写的,作用完全一样。将内容保存到一个文件中,赋予可执行权限即可。同样,待执行的命令需要使用双引号包围。
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| #!/usr/bin/env perl use strict; use warnings; #use Time::HiRes qw(sleep);
defined(my $pid = fork) or die "can't fork child: $!";
unless($pid){ # 子进程 select STDOUT; $| = 1; while(1){ foreach my $i ('-','\\','|','/'){ printf("\r%s",$i); #sleep(0.1); # 有些低版本的perl没有Time::HiRes标准模块,所以使用select select(undef,undef,undef,0.1) } } }
# 捕获信号SIGINT,放在unless()后面,可以保证不会监控到子进程 $SIG{'INT'}='trap'; sub trap { kill INT => $pid or die "Cannot signal to $pid with SIGINT: $!"; die ""; }
my $var = `/bin/sh -c "@ARGV"`; kill INT => $pid or die "Cannot signal to $pid with SIGINT: $!"; printf "\r%s",$var;
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假如该perl文件名为mygif.pl,用法:
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| ./mygif "sleep 3;echo haha" ./mygif "service mysql start" ./mygif "service mysql stop"
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