On 1/10/2013 3:01 PM, Wietse Venema wrote: > With the option to edit master.cf will come new opportunities > to destroy a configuration. > > Below is a first design for a "backup before edit" option. If no > command is configured, then no backup will be made. If the backup > command fails, then the postconf command will not edit the file. > > Wietse > > postconf_backup_command (default: empty) > > Optional external command that the postconf(1) command executes > before it attempts to modify the main.cf or master.cf file. The > macro "$file" is replaced by the absolute pathname of the file. > > Note: the command is subject to $name expansion. Specify "$$" > to produce a single "$" character. > > Example: > > # This reuses the destination name when multiple edits are made > # within the same second. > backup_command = cp -p $file $file.saved.`date +%Y%m%d-%H%M%S` >
I like this. Thanks. -- Noel Jones
