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setproctitle(3) [netbsd man page]

SETPROCTITLE(3) 					   BSD 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 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 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); BSD
April 13, 1994 BSD

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SETPROCTITLE(3) 					   BSD Library Functions Manual 					   SETPROCTITLE(3)

NAME
setproctitle -- set process title LIBRARY
Utility functions from BSD systems (libbsd, -lbsd) SYNOPSIS
#include <sys/types.h> #include <bsd/unistd.h> void setproctitle(const char *fmt, ...); DESCRIPTION
The setproctitle() library routine sets the process title that appears on the ps(1) command. 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. EXAMPLES
To set the title on a daemon to indicate its activity: setproctitle("talking to %s", inet_ntoa(addr)); SEE ALSO
ps(1), w(1), kvm(3), kvm_getargv(3), printf(3) STANDARDS
The setproctitle() function is implicitly non-standard. Other methods of causing the ps(1) command line to change, including copying over the argv[0] 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. HISTORY
The setproctitle() function first appeared in FreeBSD 2.2. Other operating systems have similar functions. AUTHORS
Peter Wemm <peter@FreeBSD.org> stole the idea from the Sendmail 8.7.3 source code by Eric Allman <eric@sendmail.org>. BUGS
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 setproctitle(). Always use the proper secure idiom: setproctitle("%s", string); BSD
December 16, 1995 BSD
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