运行prngd时出错:未能执行execl

Question

在我的linux嵌入式设备中，我以以下方式运行prngd：

prngd /var/run/egd-pool

在系统日志中，我得到以下错误：

192.168.8.195.34453:<29>Jan  1 00:04:49 prngd[132]: prngd 0.9.29 (12 Jul 2004) started up for user root

192.168.8.195.34453:<29>Jan  1 00:04:49 prngd[132]: have 7 out of 1024 filedescriptors open

192.168.8.195.34453:<25>Jan  1 00:04:50 prngd[147]: Failed to execl(/usr/bin/w, w, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:50 prngd[149]: Failed to execl(/usr/bin/last, last, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:50 prngd[150]: Failed to execl(/usr/bin/lastlog, lastlog, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:50 prngd[153]: Failed to execl(/usr/bin/vmstat, vmstat, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:50 prngd[155]: Failed to execl(/usr/bin/ipcs, ipcs, -a, , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:51 prngd[173]: Failed to execl(/usr/bin/w, w, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:51 prngd[175]: Failed to execl(/usr/bin/last, last, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:51 prngd[176]: Failed to execl(/usr/bin/lastlog, lastlog, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:51 prngd[179]: Failed to execl(/usr/bin/vmstat, vmstat, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:04:51 prngd[181]: Failed to execl(/usr/bin/ipcs, ipcs, -a, , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:19:42 prngd[220]: Failed to execl(/usr/bin/w, w, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:21:25 prngd[222]: Failed to execl(/usr/bin/last, last, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:22:16 prngd[224]: Failed to execl(/usr/bin/lastlog, lastlog, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:24:49 prngd[227]: Failed to execl(/usr/bin/vmstat, vmstat, , , , ): No such file or directory

192.168.8.195.34453:<25>Jan  1 00:26:31 prngd[229]: Failed to execl(/usr/bin/ipcs, ipcs, -a, , , ): No such file or directory

有什么办法能理解为什么prngd会给我这样的错误？谢谢。

Answer 1

在调查之后，会产生这些错误，因为在prngd配置文件(/etc/prngd.conf)中，这些文件被用来生成熵。很明显，如果设备上没有这些文件，prngd就会产生问题。要解决这个问题，只需注释与缺少的文件相关的行即可。