This is the Title of the Book, eMatter Edition
Copyright ?© 2007 O??™Reilly & Associates, Inc. All rights reserved.
840 | Chapter 21: The D (Define a Macro) Configuration Command
only in rule sets by FEATURE(redirect) (?§17.8.45 on page 640). Because ${opMode} generally
does not change once it is defined, you need not prefix it with $& when using it in rules.
21.9.78 $p
The sendmail process id All versions
The p macro contains the process ID of the sendmail that executes the delivery agent. Every
process (running program) under Unix has a unique identification number associated with
it (a process ID). Process IDs are necessary to differentiate one incantation of a program
from another. The sendmail program fork(2)s often to perform tasks (suchas delivery)
while performing other tasks (such as listening for incoming SMTP connections). All copies
share the name sendmail; each has a unique process ID number.
$p is intended for use in header definitions but can also be used in the A= equate (?§20.5.2
on page 738) of delivery agents.
$p is transient. If it is defined in the configuration file or in the command line, that definition
can be ignored by sendmail. Note that a $& prefix is necessary when you reference this
macro in rules (that is, use $&p, not $p).
21.9.79 $q
The default format of the sender??™s address V8.6 and earlier
Beginning withV8.
Pages:
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482