Repair application does not exist, resulting in expr Unexpected end o…

[xireiki]

修复 expr: Unexpected end of input 错误

31

原因

当 package 为一个不存在的应用时(比如 com.undefined.app)，$(awk '{if($1=="'${package}'"){print $2}}' /data/system/packages.list) 返回空值，导致整体解析为uid_list[0]=$(expr 0 * "100000" + )(假设用户为 0，uid_list 目前为空)，出现错误

修复

将

 uid_list[${#uid_list[@]}]=$(expr ${user} \* "100000" + $(awk '{if($1=="'${package}'"){print $2}}' /data/system/packages.list))

改为

uid="$(awk '{if($1=="'${package}'"){print $2}}' /data/system/packages.list)"
if [[ -n "${uid}" ]]; then
  uid_list[${#uid_list[@]}]=$(expr ${user} \* "100000" + ${uid})
fi