来自JSON字符串的Sh脚本JSON值

我有一个文件，其中包含一个JSON对象作为字符串：

{"STATUS":[{"STATUS":"S","When":1530779438,"Code":70,"Msg":"CGMiner stats","Description":"cgminer 4.9.0"}],"STATS":[{"CGMiner":"4.9.0","Miner":"9.0.0.5","CompileTime":"Sat May 26 20:42:30 CST 2018","Type":"Antminer Z9-Mini"},{"STATS":0,"ID":"ZCASH0","Elapsed":179818,"Calls":0,"Wait":0.000000,"Max":0.000000,"Min":99999999.000000,"GHS 5s":"16.39","GHS av":16.27,"miner_count":3,"frequency":"750","fan_num":1,"fan1":5760,"fan2":0,"fan3":0,"fan4":0,"fan5":0,"fan6":0,"temp_num":3,"temp1":41,"temp2":40,"temp3":43,"temp2_1":56,"temp2_2":53,"temp2_3":56,"temp_max":43,"Device Hardware%":0.0000,"no_matching_work":0,"chain_acn1":4,"chain_acn2":4,"chain_acn3":4,"chain_acs1":" oooo","chain_acs2":" oooo","chain_acs3":" oooo","chain_hw1":0,"chain_hw2":0,"chain_hw3":0,"chain_rate1":"5.18","chain_rate2":"5.34","chain_rate3":"5.87"}],"id":1}

现在我想从sh脚本中该对象的键中获取一些值

下面的cmd可以工作，但不是所有键都可以

这是有效的：（我得到“750”）

但这不是：（空的）

与此相同：

grep -o '"fan1": *"[^"]*"' LXstats.txt | grep -o '"[^"]*"$'

在没有python的xilinx操作系统上工作，所以“jq”不起作用，而grep没有“-p”选项。那么有人有办法解决这个问题吗？：）

谢谢并致以最良好的祝愿，

---

dave

当你想做的不仅仅是

g/re/p

时，你应该使用awk，而不是greps+管道的组合，等等

$ awk -v tag='frequency' 'match($0,"\""tag"\": *(\"[^\"]*|[0-9]+)") { val=substr($0,RSTART,RLENGTH); sub(/^"[^"]+": *"?/,"",val); print val }' file
750

$ awk -v tag='fan_num' 'match($0,"\""tag"\": *(\"[^\"]*|[0-9]+)") { val=substr($0,RSTART,RLENGTH); sub(/^"[^"]+": *"?/,"",val); print val }' file
1

$ awk -v tag='fan1' 'match($0,"\""tag"\": *(\"[^\"]*|[0-9]+)") { val=substr($0,RSTART,RLENGTH); sub(/^"[^"]+": *"?/,"",val); print val }' file
5760

以上内容将适用于任何UNIX设备上任何shell中的任何awk。如果第三个参数要匹配（）和gensub（）有GNU awk，则可以编写得更简短一些：

$ awk -v tag='frequency' 'match($0,"\""tag"\": *(\"[^\"]*|[0-9]+)",a) { print gensub(/^"/,"",1,a[1]) }' file
750

---

频率有双引号值，而fan_num和fan1没有引号，只有数字……您应该使用

jq

，而不是

grep

或任何其他面向行的工具

jq'.STATS[].frequency'

等。

jq

是静态链接的，因此安装它的依赖性最小。

$ awk -v tag='frequency' 'match($0,"\""tag"\": *(\"[^\"]*|[0-9]+)") { val=substr($0,RSTART,RLENGTH); sub(/^"[^"]+": *"?/,"",val); print val }' file
750

$ awk -v tag='fan_num' 'match($0,"\""tag"\": *(\"[^\"]*|[0-9]+)") { val=substr($0,RSTART,RLENGTH); sub(/^"[^"]+": *"?/,"",val); print val }' file
1

$ awk -v tag='fan1' 'match($0,"\""tag"\": *(\"[^\"]*|[0-9]+)") { val=substr($0,RSTART,RLENGTH); sub(/^"[^"]+": *"?/,"",val); print val }' file
5760

$ awk -v tag='frequency' 'match($0,"\""tag"\": *(\"[^\"]*|[0-9]+)",a) { print gensub(/^"/,"",1,a[1]) }' file
750