This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
116 lines
3.7 KiB
Groff
116 lines
3.7 KiB
Groff
.\" $NetBSD: getprogname.3,v 1.7 2008/03/29 16:51:40 dholland Exp $
|
|
.\"
|
|
.\" Copyright (c) 2001 Christopher G. Demetriou
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed for the
|
|
.\" NetBSD Project. See http://www.NetBSD.org/ for
|
|
.\" information about NetBSD.
|
|
.\" 4. The name of the author may not be used to endorse or promote products
|
|
.\" derived from this software without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
|
|
.\"
|
|
.Dd March 29, 2008
|
|
.Dt GETPROGNAME 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm getprogname ,
|
|
.Nm setprogname
|
|
.Nd get/set the name of the current program
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In stdlib.h
|
|
.Ft const char *
|
|
.Fn getprogname "void"
|
|
.Ft void
|
|
.Fn setprogname "const char *name"
|
|
.Sh DESCRIPTION
|
|
These utility functions get and set the current program's name
|
|
as used by various error-reporting functions.
|
|
.Pp
|
|
.Fn getprogname
|
|
returns the name of the current program.
|
|
This function is typically useful when generating error messages
|
|
or other diagnostic output.
|
|
If the program name has not been set,
|
|
.Fn getprogname
|
|
will return
|
|
.Dv NULL .
|
|
.Pp
|
|
.Fn setprogname
|
|
sets the name of the current program to be the last pathname
|
|
component of the
|
|
.Fa name
|
|
argument.
|
|
It should be invoked at the start of the program, using the
|
|
.Fa argv[0]
|
|
passed into the program's
|
|
.Fn main
|
|
function.
|
|
A pointer into the string pointed to by the
|
|
.Fa name
|
|
argument is kept as the program name.
|
|
Therefore, the string pointed to by
|
|
.Fa name
|
|
should not be modified during the rest of the program's operation.
|
|
.Pp
|
|
A program's name can only be set once, and in
|
|
.Nx
|
|
that is actually
|
|
done by program start-up code that is run before
|
|
.Fn main
|
|
is called.
|
|
Therefore, in
|
|
.Nx ,
|
|
calling
|
|
.Fn setprogname
|
|
from
|
|
.Fn main
|
|
has no effect.
|
|
However, it does serve to increase the portability of the program:
|
|
on other operating systems,
|
|
.Fn getprogname
|
|
and
|
|
.Fn setprogname
|
|
may be implemented by a portability library, and a call to
|
|
.Fn setprogname
|
|
allows that library to know the program name without
|
|
modifications to that system's program start-up code.
|
|
.Sh SEE ALSO
|
|
.Xr err 3 ,
|
|
.Xr setproctitle 3
|
|
.Sh HISTORY
|
|
The
|
|
.Nm getprogname
|
|
and
|
|
.Nm setprogname
|
|
function calls appeared in
|
|
.Nx 1.6 .
|
|
.Sh RESTRICTIONS
|
|
The string returned by
|
|
.Fn getprogname
|
|
is supplied by the invoking process and should not be trusted by
|
|
setuid or setgid programs.
|