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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 .