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(After a Crash): Describe how to use emacs-buffer.gdb more explicitly.

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Noah Friedman 2005-05-30 10:59:43 +00:00
parent e55df387ea
commit 165408692a
1 changed files with 16 additions and 3 deletions
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19
man/trouble.texi
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@ -351,12 +351,25 @@ visits the file but gets the text from the auto-save file.
recover are present in Emacs buffers. You should then save them. Only
this---saving them---updates the files themselves.
As a last resort, if you had buffers with content which were not
associated with any files, or if the autosave was not recent enough to
have recorded important changes, you can use the
@file{etc/emacs-buffer.gdb} script with @code{gdb} to retrieve them
from a core dump--provided that a core dump was saved, and that the
emacs executable was not stripped of its debugging symbols.
@file{etc/emacs-buffer.gdb} script with GDB (the GNU Debugger) to
retrieve them from a core dump--provided that a core dump was saved,
and that the Emacs executable was not stripped of its debugging
symbols.
To use this script, run @code{gdb} with the file name of your
Emacs executable and the file name of the core dump, e.g. @samp{gdb
/usr/bin/emacs core.emacs}. At the @code{(gdb)} prompt, load the
recovery script: @samp{source /usr/src/emacs/etc/emacs-buffer.gdb}.
You can now use the commands @code{ybuffer-list} and
@code{ysave-buffer} to list and save buffers. The @code{ysave-buffer}
command takes a buffer number (as listed by @code{ybuffer-list}) and a
file name to which to write the buffer contents. You should use a
file name which does not already exist; no backups of the previous
contents of the file will be saved, if any.
@node Emergency Escape
@subsection Emergency Escape