How to get a process tree trace/log of a process in linux?
I want to know what executables a script launches an开发者_运维问答d in what order (and trace those executables recursively).
For example, let's say I have a bash script here (called abc.sh):
#!/bin/bash
ls
gcc
I'd like to run this script with a "trace/log command" and get something like this:
abc.sh -- ls
|-- gcc -- cpp
-- cc1
... etc.
This show that abc.sh called ls, and gcc. gcc, in turn, called cpp and cc1.
Is this possible? How can I do it? A tree view like the above would be nice, but a simpler view would work as well.
Note that I do not want the current snapshot of the process tree. Rather, I want a trace or a log of the spawning processes. Timing annotation would also be useful.
Thanks!
You may try to analyse the output of strace
command.
Particularly, you'll be interested in something like
strace -f -tt -e trace=execve ./abc.sh
You can use pstree command. It was conceived to show exactly what you are looking for: process tree (hence the name, pstree). It won't give you process tracing, but you could call it multiple times to get something similar to what you're looking fOr.
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