How to make sendmail re-read the configuration file

[Paul Sutcliffe Jr.]

In article <136 at quacky.mips.UUCP>, dce at mips.UUCP (David Elliott) writes:

> I would like to modify sendmail to have it re-read the configuration
> file on some given signal (HUP?), but I am worried that sendmail
> can't handle this without modifications elsewhere. Is there anyone
> with a lot of sendmail experience that can help me out?

Why not do what cron(1) does.  Perform a stat() call on the file's fd
after it is first opened and save the st_mtime value somewhere (the
last modification time of the file).  Then have sendmail re-stat the
file every time it is awakened, compare the new st_mtime value with the
saved one, and if the new one is greater (the config file has been
modified since the original read), re-read the file.

-paul

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