Sendmail, 3rd Edition

Name

SPT_TYPE

Synopsis

Whenever a program first begins to run, Unix provides it with two arrays of information: its command-line arguments, and the environment under which it was run. When you run ps(1) to see what processes are doing, ps prints the command line that was used to run each program.

To provide more useful information (such as current status or host connected to), sendmail saves its command line and environment, then periodically uses that system space to display its status. This ability provides a valuable tool for monitoring what each invocation of sendmail is doing.

The method to display this information is correctly defined in sendmail/conf.c (include/sm/conf.h with V8.12 and above) for all supported systems. In the rare event that you need to port sendmail to another system, you can do so by defining SPT_TYPE in sendmail/conf.h. The values that can be assigned to this SPT_TYPE are listed in Table 3-13.

Table 3-13. Values available for use with SPT_TYPE

Define	Description
SPT_BUILTIN	The system library has setproctitle(2).
SPT_CHANGEARGV	Write pointers to our own strings into the existing argv vector.
SPT_NONE	Don’t try to set the process title at all.
SPT_PSSTRINGS	Use the magic PS_STRINGS pointer (4.4BSD).
SPT_PSTAT	Use the PSTAT_SETCMD option to pstat(2).
SPT_REUSEARGV	Replace your argv with the information.
SPT_SCO	Write to the kernel’s u. area.
SPT_SYSMIPS	Use sysmips(2) supported by NEWS-OS 6.

If you set SPT_TYPE to SPT_REUSEARGV, you will ...