[Bug gdb/20021] New: cannot run batch mode with close stdin

["moorel at ntlworld dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=20021

            Bug ID: 20021
           Summary: cannot run batch mode with close stdin
           Product: gdb
           Version: 7.11
            Status: NEW
          Severity: critical
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: moorel at ntlworld dot com
  Target Milestone: ---

Hi

I have recently upgraded from gdb 7.9 to gdb 7.11, and the behavior for running
batch mode has changed.

In our system we are using gdb to run on the target simulator using a batch
command script, so usage is of the form

$ gdb --batch --command gdb.cmd

When this is run in a shell with a terminal all is well, but when run remotely
without a terminal it fails, effectively this can be reproduced locally by
doing the following to close the standard input

$ gdb --batch --command gdb.cmd < /dev/null | tee gdb.log

or

$ gdb --batch --command gdb.cmd 0<&- | tee gdb.log

any ideas why this is now failing, whereas it worked in version 7,9 ?

The failure I get is that it drops out from runing the bath commands early

Thx
Lee

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