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Command: setproctitle | Section: 3 | Source: OpenBSD | File: setproctitle.3
SETPROCTITLE(3) FreeBSD Library Functions Manual SETPROCTITLE(3)
NAME
setproctitle - set process title
SYNOPSIS
#include <stdlib.h>
void
setproctitle(const char *fmt, ...);
DESCRIPTION
The setproctitle() function sets the invoking process's title. The
process title is set to the last component of the program name, followed
by a colon, a single space, and the formatted string specified by fmt.
If fmt is NULL, the colon and formatted string are omitted. The length
of a process title is limited to 2048 bytes.
EXAMPLES
Set the process title to the program name, with no further information:
setproctitle(NULL);
Set the process title to the program name, an informational string, and
the process ID:
setproctitle("foo! (%d)", getpid());
SEE ALSO
ps(1), w(1), getprogname(3), printf(3)
HISTORY
The setproctitle() function first appeared in NetBSD 0.9A.
CAVEATS
It is important never to pass a string with user-supplied data as a
format without using `%s'. An attacker can put format specifiers in the
string to mangle the stack, leading to a possible security hole. This
holds true even if the string has been built "by hand" using a function
like snprintf(), as the resulting string may still contain user-supplied
conversion specifiers for later interpolation by setproctitle().
Always be sure to use the proper secure idiom:
setproctitle("%s", string);
FreeBSD 14.1-RELEASE-p8 June 5, 2013 FreeBSD 14.1-RELEASE-p8