setproctitle — set
library routine only needs to be called (before any call to
setproctitle() and with
arguments), if the automatic constructor support has not been linked in
through the libbsd-ctor pkg-config file.
The title is set from the executable's name, followed by the result of a printf(3) style expansion of the arguments as specified by the fmt argument. If the fmt argument begins with a “-” character, the executable's name is skipped.
If fmt is NULL, the process title is restored.
To set the title on a daemon to indicate its activity:
setproctitle("talking to %s", inet_ntoa(addr));
setproctitle() function is implicitly
non-standard. Other methods of causing the ps(1) command
line to change, including copying over the argv string are also
implicitly non-portable. It is preferable to use an operating system
setproctitle() if present.
Unfortunately, it is possible that there are other calling
conventions to other versions of
although none have been found by the author as yet. This is believed to be
the predominant convention.
It is thought that the implementation is compatible with other systems, including NetBSD and BSD/OS.
setproctitle() function first appeared
in FreeBSD 2.2. Other operating systems have similar
setproctitle_init() function is a
libbsd extension not present on the BSDs; avoid using it in portable
Peter Wemm ⟨peter@FreeBSD.org⟩ stole the idea from the Sendmail 8.7.3 source code by Eric Allman ⟨email@example.com⟩.
Never pass a string with user-supplied data as a format without
%s’. An attacker can put format
specifiers in the string to mangle your stack, leading to a possible
security hole. This holds true even if the string was built using a function
snprintf(), as the resulting string may still
contain user-supplied conversion specifiers for later interpolation by
Always use the proper secure idiom:
|December 16, 1995||Debian|