qmail-newu.9

linux下qmail的源码 本人加了一些注释

.TH qmail-newu 8
.SH NAME
qmail-newu \- prepare address assignments for qmail-lspawn
.SH SYNOPSIS
.B qmail-newu
.SH DESCRIPTION
.B qmail-newu
reads the assignments in
.B QMAILHOME/users/assign
and writes them into
.B QMAILHOME/users/cdb
in a binary format suited
for quick access by
.BR qmail-lspawn .

If there is a problem with
.BR users/assign ,
.B qmail-newu
complains and leaves
.B users/cdb
alone.

.B qmail-newu
ensures that
.B users/cdb
is updated atomically,
so
.B qmail-lspawn
never has to wait for
.B qmail-newu
to finish.
However,
.B qmail-newu
makes no attempt to protect against two simultaneous updates of
.BR users/cdb .

The binary
.B users/cdb
format is portable across machines.
.SH "SEE ALSO"
qmail-users(5),
qmail-lspawn(8),
qmail-pw2u(8)