The msgid utility generates message IDs.
A message ID is a numeric identifier that uniquely identifies a message. Although the probability of two distinct messages having the same ID is high, this can be greatly reduced with the appropriate priority or facility.level designator (see syslogd(1M)). Specifically, the message ID is a hash signature on the message's unexpanded format string, generated by STRLOG_MAKE_MSGID() as defined in <sys/strlog.h>.
syslogd(1M) is a simple filter that takes strings as input and produces those same strings, preceded by their message IDs, as output. Every message logged by syslogd(1M) includes the message ID. The message ID is intended to serve as a small, language-independent identifier.
The following example uses the msgid command to generate a message ID for the echo command.
example# echo hello | msgid 205790 hello example#Example 2 Using the msgid command to Generate a Message Catalog
The following example uses the msgid command to enumerate all of the messages in the binary zfs, on an x86 machine, to generate a message catalog.
example# strings /kernel/fs/amd64/zfs | msgid ... 726970 stride_hits 766819 stride_misses 929857 reclaim_successes 412490 reclaim_failures 234331 streams_resets 737841 streams_noresets 471619 bogus_streams 878613 onloan_read_buf ...
See attributes(5) for descriptions of the following attributes: