1 .\" Copyright (c) 1995 Peter Wemm <peter@FreeBSD.org>
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30 .ds str-Lb-libbsd Utility functions from BSD systems (libbsd, \-lbsd)
36 .Fn setproctitle_init "int argc" "char *argv[]" "char *envp[]"
38 .Fn setproctitle "const char *fmt" "..."
42 library routine sets the process title that appears on the
48 library routine only needs to be called (before any call to
52 arguments), if the automatic constructor support has not
53 been linked in through the libbsd-ctor pkg-config file.
55 The title is set from the executable's name, followed by the
58 style expansion of the arguments as specified by the
63 argument begins with a
65 character, the executable's name is skipped.
69 is NULL, the process title is restored.
71 To set the title on a daemon to indicate its activity:
72 .Bd -literal -offset indent
73 setproctitle("talking to %s", inet_ntoa(addr));
85 is implicitly non-standard.
86 Other methods of causing the
88 command line to change, including copying over the argv[0] string are
89 also implicitly non-portable.
90 It is preferable to use an operating system
95 Unfortunately, it is possible that there are other calling conventions
98 although none have been found by the author as yet.
99 This is believed to be
100 the predominant convention.
102 It is thought that the implementation is compatible with other systems,
113 Other operating systems have
117 .Fn setproctitle_init
118 function is a libbsd extension not present on the BSDs, avoid using it
122 .An Peter Wemm Aq peter@FreeBSD.org
123 stole the idea from the
126 .An Eric Allman Aq eric@sendmail.org .
128 Never pass a string with user-supplied data as a format without using
130 An attacker can put format specifiers in the string to mangle your stack,
131 leading to a possible security hole.
132 This holds true even if the string was built using a function like
134 as the resulting string may still contain user-supplied conversion specifiers
135 for later interpolation by
138 Always use the proper secure idiom:
140 .Dl setproctitle("%s", string);