unistd.h> (See libbsd(7) for include usage.)
setproctitle_init(int argc, char *argv, char *envp);
setproctitle(const char *fmt, ...);
setproctitle() library routine sets the process title that appears on the ps(1) command.
setproctitle_init() library routine only needs to be called (before any call to
setproctitle() and with
main() 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));
ps(1), w(1), kvm(3), kvm_getargv(3), printf(3)
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 supplied
setproctitle() if present.
Unfortunately, it is possible that there are other calling conventions to other versions of
setproctitle(), 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 functions.
setproctitle_init() function is a libbsd extension not present on the BSDs; avoid using it in portable code.
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 using ‘
%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 like
snprintf(), as the resulting string may still contain user-supplied conversion specifiers for later interpolation by
Always use the proper secure idiom:
The man page setproctitle_init.3bsd(3) is an alias of setproctitle.3bsd(3).