setproctitle(3) - NetBSD Manual Pages

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SETPROCTITLE(3)         NetBSD Library Functions Manual        SETPROCTITLE(3)


NAME
setproctitle -- set process title
LIBRARY
Standard C Library (libc, -lc)
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 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 1.0.
CAVEATS
It is important never to pass a string with user-supplied data as a for- mat 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 you have built the string ``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); NetBSD 9.0 April 13, 1994 NetBSD 9.0
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