\" $NetBSD: efun.3,v 1.14 2015/07/26 17:37:38 kamil Exp $
\"
\" Copyright (c) 2006 The NetBSD Foundation, Inc.
\" All rights reserved.
\"
\" This code is derived from software contributed to The NetBSD Foundation
\" by Christos Zoulas.
\"
\" 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.
\"
\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
\" ``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 FOUNDATION OR CONTRIBUTORS
\" 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
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\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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\"
Dd July 26, 2015
Dt EFUN 3
Os
Sh NAME
Nm esetfunc ,
Nm easprintf ,
Nm efopen ,
Nm emalloc ,
Nm ecalloc ,
Nm erealloc ,
Nm ereallocarr ,
Nm estrdup ,
Nm estrndup ,
Nm estrlcat ,
Nm estrlcpy ,
Nm estrtoi ,
Nm estrtou ,
Nm evasprintf
Nd error-checked utility functions
Sh LIBRARY
Lb libutil
Sh SYNOPSIS
In util.h
Ft void (*)(int, const char *, ...)
Fn esetfunc "void (*)(int, const char *, ...)"
Ft int
Fn easprintf "char ** restrict str" "const char * restrict fmt" "..."
Ft FILE *
Fn efopen "const char *p" "const char *m"
Ft void *
Fn ecalloc "size_t n" "size_t s"
Ft void *
Fn emalloc "size_t n"
Ft void *
Fn erealloc "void *p" "size_t n"
Ft void
Fn ereallocarr "void *p" "size_t n" "size_t s"
Ft char *
Fn estrdup "const char *s"
Ft char *
Fn estrndup "const char *s" "size_t len"
Ft size_t
Fn estrlcat "char *dst" "const char *src" "size_t len"
Ft size_t
Fn estrlcpy "char *dst" "const char *src" "size_t len"
Ft intmax_t
Fn estrtoi "const char * nptr" "int base" "intmax_t lo" "intmax_t hi"
Ft uintmax_t
Fn estrtou "const char * nptr" "int base" "uintmax_t lo" "uintmax_t hi"
Ft int
Fn evasprintf "char ** restrict str" "const char * restrict fmt" "..."
Sh DESCRIPTION
The
Fn easprintf ,
Fn efopen ,
Fn ecalloc ,
Fn emalloc ,
Fn erealloc ,
Fn ereallocarr ,
Fn estrdup ,
Fn estrndup ,
Fn estrlcat ,
Fn estrlcpy ,
Fn estrtoi ,
Fn estrtou ,
and
Fn evasprintf
functions
operate exactly as the corresponding functions that do not start with an
Sq e
except that in case of an error, they call
the installed error handler that can be configured with
Fn esetfunc .
Pp
For the string handling functions, it is an error when the destination
buffer is not large enough to hold the complete string.
For functions that allocate memory or open a file, it is an error when
they would return a null pointer.
The default error handler is
Xr err 3 .
The function
Fn esetfunc
returns the previous error handler function.
A
Dv NULL
error handler will just call
Xr exit 3 .
Sh SEE ALSO
Xr asprintf 3 ,
Xr calloc 3 ,
Xr err 3 ,
Xr exit 3 ,
Xr fopen 3 ,
Xr malloc 3 ,
Xr realloc 3 ,
Xr reallocarr 3 ,
Xr strdup 3 ,
Xr strlcat 3 ,
Xr strlcpy 3 ,
Xr strndup 3 ,
Xr strtoi 3 ,
Xr strtou 3 ,
Xr vasprintf 3
Sh HISTORY
The
Fn estrtoi ,
Fn estrtou
and
Fn ereallocarr
functions were added in
Nx 8 .
