.\" Copyright (c) 1990, 1991, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek.
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.\" modification, are permitted provided that the following conditions
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.\" 3. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\"     @(#)string.3	8.2 (Berkeley) 12/11/93
.\"
.Dd December 11, 1993
.Dt STRING 3
.Os
.Sh NAME
.Nm stpcpy ,
.Nm strcat ,
.Nm strncat ,
.Nm strchr ,
.Nm strrchr ,
.Nm strcmp ,
.Nm strncmp ,
.Nm strcasecmp ,
.Nm strncasecmp ,
.Nm strcpy ,
.Nm strncpy ,
.Nm strerror ,
.Nm strlen ,
.Nm strpbrk ,
.Nm strsep ,
.Nm strspn ,
.Nm strcspn ,
.Nm strstr ,
.Nm strtok ,
.Nm index ,
.Nm rindex
.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 strcat "char *s" "const char * append"
.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 char *
.Fn strcpy "char *dst" "const char *src"
.Ft char *
.Fn strncpy "char *dst" "const char *src" "size_t count"
.Ft char *
.Fn strerror "int errno"
.Ft size_t
.Fn strlen "const char *s"
.Ft char *
.Fn strpbrk "const char *s" "const char *charset"
.Ft char *
.Fn strsep "char **stringp" "const char *delim"
.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 strstr "const char *big" "const char *little"
.Ft char *
.Fn strtok "char *s" "const char *delim"
.Ft char *
.Fn index "const char *s" "int c"
.Ft char *
.Fn rindex "const char *s" "int c"
.Sh DESCRIPTION
The string
functions manipulate strings terminated by a
null byte.
.Pp
See the specific manual pages for more information.
For manipulating variable length generic objects as byte
strings (without the null 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 index 3 ,
.Xr rindex 3 ,
.Xr stpcpy 3 ,
.Xr strcasecmp 3 ,
.Xr strcat 3 ,
.Xr strchr 3 ,
.Xr strcmp 3 ,
.Xr strcpy 3 ,
.Xr strcspn 3 ,
.Xr strerror 3 ,
.Xr strlen 3 ,
.Xr strpbrk 3 ,
.Xr strrchr 3 ,
.Xr strsep 3 ,
.Xr strspn 3 ,
.Xr strstr 3 ,
.Xr strtok 3
.Sh STANDARDS
The
.Fn strcat ,
.Fn strncat ,
.Fn strchr ,
.Fn strrchr ,
.Fn strcmp ,
.Fn strncmp ,
.Fn strcpy ,
.Fn strncpy ,
.Fn strerror ,
.Fn strlen ,
.Fn strpbrk ,
.Fn strspn ,
.Fn strcspn ,
.Fn strstr ,
and
.Fn strtok
functions
conform to
.St -isoC .