\" Copyright (c) 1990, 1991, 1993
\"      The Regents of the University of California.  All rights reserved.
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\" This code is derived from software contributed to Berkeley by
\" Chris Torek.
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\" 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. Neither the name of the University nor the names of its contributors
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\"    without specific prior written permission.
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\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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\"     from: @(#)string.3       8.2 (Berkeley) 12/11/93
\"      $NetBSD: string.3,v 1.18 2017/04/26 07:40:09 abhinav Exp $
\"
Dd April 26, 2017
Dt STRING 3
Os
Sh NAME
Nm string
Nd string specific functions
Sh LIBRARY
Lb libc
Sh SYNOPSIS
In string.h
Ft char *
Fn stpcpy "char *dst" "const char *src"
Ft char *
Fn stpncpy "char *dst" "const char *src" "size_t count"
Ft char *
Fn strcat "char *s" "const char * append"
Ft size_t
Fn strlcat "char *dst" "const char *src" "size_t size"
Ft char *
Fn strncat "char *s" "const char *append" "size_t count"
Ft char *
Fn strchr "const char *s" "int c"
Ft char *
Fn strrchr "const char *s" "int c"
Ft int
Fn strcmp "const char *s1" "const char *s2"
Ft int
Fn strncmp "const char *s1" "const char *s2" "size_t count"
Ft int
Fn strcasecmp "const char *s1" "const char *s2"
Ft int
Fn strncasecmp "const char *s1" "const char *s2" "size_t count"
Ft int
Fn strcoll "const char *s1" "const char *s2"
Ft char *
Fn strcpy "char *dst" "const char *src"
Ft size_t
Fn strlcpy "char *dst" "const char *src" "size_t size"
Ft char *
Fn strncpy "char *dst" "const char *src" "size_t count"
Ft char *
Fn strerror "int errno"
Ft int
Fn strerror_r "int errnum" "char *strerrbuf" "size_t buflen"
Ft size_t
Fn strlen "const char *s"
Ft size_t
Fn strnlen "const char *s" "size_t count"
Ft char *
Fn strpbrk "const char *s" "const char *charset"
Ft char *
Fn strsep "char **stringp" "const char *delim"
Ft char *
Fn stresep "char **stringp" "const char *delim" "int escape"
Ft size_t
Fn strspn "const char *s" "const char *charset"
Ft size_t
Fn strcspn "const char *s" "const char *charset"
Ft char *
Fn strdup "const char *str"
Ft char *
Fn strndup "const char *str" "size_t len"
Ft char *
Fn strstr "const char *big" "const char *little"
Ft char *
Fn strcasestr "const char *big" "const char *little"
Ft char *
Fn strtok "char *s" "const char *delim"
Ft char *
Fn strtok_r "char *s" "const char *delim" "char **lasts"
Ft size_t
Fn strxfrm "char *dst" "const char *src" "size_t n"
Sh DESCRIPTION
The string
functions manipulate strings terminated by a
nul byte.
Pp
See the specific manual pages for more information.
For manipulating variable length generic objects as byte
strings (without the nul byte check), see
Xr bstring 3 .
Pp
Except as noted in their specific manual pages,
the string functions do not test the destination
for size limitations.
Sh SEE ALSO
Xr bstring 3 ,
Xr strcat 3 ,
Xr strchr 3 ,
Xr strcmp 3 ,
Xr strcoll 3 ,
Xr strcpy 3 ,
Xr strcspn 3 ,
Xr strdup 3 ,
Xr strerror 3 ,
Xr strings 3 ,
Xr strlcat 3 ,
Xr strlen 3 ,
Xr strpbrk 3 ,
Xr strrchr 3 ,
Xr strsep 3 ,
Xr strspn 3 ,
Xr strstr 3 ,
Xr strtok 3 ,
Xr strxfrm 3
Sh STANDARDS
The
Fn strcat ,
Fn strncat ,
Fn strchr ,
Fn strrchr ,
Fn strcmp ,
Fn strncmp ,
Fn strcpy ,
Fn strncpy ,
Fn strcoll ,
Fn strerror ,
Fn strlen ,
Fn strpbrk ,
Fn strsep ,
Fn strspn ,
Fn strcspn ,
Fn strstr ,
Fn strtok ,
and
Fn strxfrm
functions conform to
St -ansiC .
Pp
The
Fn strtok_r
function conforms to
St -p1003.1c-95 .
Pp
The
Fn strerror_r
function conforms to
St -p1003.1-2001 .

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