readproctitle(8)readproctitle(8)NAMEreadproctitle - maintains an automatically rotated log in memory for
inspection by ps(1).
readproctitle is available in daemontools 0.75 and above.
SYNOPSISreadproctitle L D
DESCRIPTION
L consists of any number of arguments. D is one argument consisting of
at least five dots.
readproctitle reads data into the end of D, shifting D to the left to
make room. This means that the most recent data is visible to process-
listing tools such as ps(1). readproctitle always leaves three dots at
the left of D.
For example, if
readproctitle io errors: ....................
reads the data
fatal error xyz
warning abc
then its command-line arguments change to
readproctitle io errors: ... xyz!warning abc!
where each ! is a newline character. Process-listing tools typically
show the newline character as ? or \n.
readproctitle exits when it reaches the end of input.
Beware that most implementations of ps(1) have small argument-length
limits. These limits apply to the total length of readproctitle L D. I
have not seen a system with a limit below 512 bytes.
SEE ALSOsupervise(8), svc(8), svok(8), svstat(8), svscanboot(8), svscan(8),
fghack(8), pgrphack(8), multilog(8), tai64n(8), tai64nlocal(8), setu‐
idgid(8), envuidgid(8), envdir(8), softlimit(8), setlock(8), ps(1)
http://cr.yp.to/daemontools.html
http://cr.yp.to/slashcommand.html
readproctitle(8)
