Created attachment 8581 [details]
zcat multiple gz files will generate zombie processes

When I use zcat to view the contents of several compressed packages, these come from the community，some zombie processes will be generated before the zcat task is completed。
For example:
  $ zcat attr-2.4.48.tar.gz iproute2-5.5.0.tar.gz libffi-3.3.tar.gz

 I use the ps command to view the process status, the result is as follows:
  $ ps -ef | grep zcat
  root       12583    9689  0 20:50 pts/5    00:00:00 zcat attr-2.4.48.tar.gz iproute2-5.5.0.tar.gz libffi-3.3.tar.gz
  root       12584   12583  0 20:50 pts/5    00:00:00 [zcat] <defunct>
  root       12587   12583  0 20:50 pts/5    00:00:00 [zcat] <defunct>

  When the zcat task ends, the zombie process is recycled， when the compressed package is relatively large, the zombie process will exist for a period of time.

  When viewing each compressed package, will fork a child, but the parent process does not reclaim resources after the child ends. 
  Should the resource be reclaimed when the child process exits？The attachment provides a repair plan for reference.