文件`/ proc/{processId}/cmdline`的長度限制有多長？

Question

我有一個java進程，其classpath包含很多jar，所以啓動命令很長。

假設進程ID是110101，當我通過命令cat /proc/110101/cmdline檢查命令時，發現命令不完整，它只包含大約4000個字符。

是否有其他方法顯示原始啓動命令？

Answer 1

man proc 

/proc/[pid]/cmdline 
       This holds the complete command line for the process, unless 
       the process is a zombie. In the latter case, there is nothing 
       in this file: that is, a read on this file will return 0 
       characters. The command-line arguments appear in this file as 
       a set of strings separated by null bytes ('\0'), with a 
       further null byte after the last string. 

它可能不會給你所有的ARGS通過貓的文件。