bash - redirecting of stdoutput and stderror does not catch all output

Question

I am writing some testing scripts and want to catch all error output and write it to an error log as well as all regular output and write that to a separate log. I am using a command of the form

cmd > output.file 2> error.file

The command I am writing test scripts for can cause a segmentation fault. When the command segfaults, bash still prints out segmentation fault to the terminal.

I want this to not happen or get redirected along with standard error.

Is it possible? It must be of bash's doing because both output streams are being redirected.

Answer 1

I don't think segfaults are part of your program's output from the shell's point of view. So use

Expect for more reliable output

http://en.wikipedia.org/wiki/Expect

Answer 2

bash -c 'cmd >output.file 2>error.file' >bash_output.file 2>&1