1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Chris Torek. 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. Neither the name of the University nor the names of its contributors 15.\" may be used to endorse or promote products derived from this software 16.\" without specific prior written permission. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" 30.\" @(#)string.3 8.2 (Berkeley) 12/11/93 31.\" $FreeBSD: src/lib/libc/string/string.3,v 1.14 2007/01/09 00:28:12 imp Exp $ 32.\" $DragonFly: src/lib/libc/string/string.3,v 1.2 2003/06/17 04:26:46 dillon Exp $ 33.\" 34.Dd December 11, 1993 35.Dt STRING 3 36.Os 37.Sh NAME 38.Nm stpcpy , 39.Nm strcat , 40.Nm strncat , 41.Nm strchr , 42.Nm strrchr , 43.Nm strcmp , 44.Nm strncmp , 45.Nm strcasecmp , 46.Nm strncasecmp , 47.Nm strcpy , 48.Nm strncpy , 49.Nm strerror , 50.Nm strlen , 51.Nm strpbrk , 52.Nm strsep , 53.Nm strspn , 54.Nm strcspn , 55.Nm strstr , 56.Nm strtok , 57.Nm index , 58.Nm rindex 59.Nd string specific functions 60.Sh LIBRARY 61.Lb libc 62.Sh SYNOPSIS 63.In string.h 64.Ft char * 65.Fn stpcpy "char *dst" "const char *src" 66.Ft char * 67.Fn strcat "char *s" "const char * append" 68.Ft char * 69.Fn strncat "char *s" "const char *append" "size_t count" 70.Ft char * 71.Fn strchr "const char *s" "int c" 72.Ft char * 73.Fn strrchr "const char *s" "int c" 74.Ft int 75.Fn strcmp "const char *s1" "const char *s2" 76.Ft int 77.Fn strncmp "const char *s1" "const char *s2" "size_t count" 78.Ft int 79.Fn strcasecmp "const char *s1" "const char *s2" 80.Ft int 81.Fn strncasecmp "const char *s1" "const char *s2" "size_t count" 82.Ft char * 83.Fn strcpy "char *dst" "const char *src" 84.Ft char * 85.Fn strncpy "char *dst" "const char *src" "size_t count" 86.Ft char * 87.Fn strerror "int errno" 88.Ft size_t 89.Fn strlen "const char *s" 90.Ft char * 91.Fn strpbrk "const char *s" "const char *charset" 92.Ft char * 93.Fn strsep "char **stringp" "const char *delim" 94.Ft size_t 95.Fn strspn "const char *s" "const char *charset" 96.Ft size_t 97.Fn strcspn "const char *s" "const char *charset" 98.Ft char * 99.Fn strstr "const char *big" "const char *little" 100.Ft char * 101.Fn strtok "char *s" "const char *delim" 102.Ft char * 103.Fn index "const char *s" "int c" 104.Ft char * 105.Fn rindex "const char *s" "int c" 106.Sh DESCRIPTION 107The string 108functions manipulate strings terminated by a 109null byte. 110.Pp 111See the specific manual pages for more information. 112For manipulating variable length generic objects as byte 113strings (without the null byte check), see 114.Xr bstring 3 . 115.Pp 116Except as noted in their specific manual pages, 117the string functions do not test the destination 118for size limitations. 119.Sh SEE ALSO 120.Xr bstring 3 , 121.Xr index 3 , 122.Xr rindex 3 , 123.Xr stpcpy 3 , 124.Xr strcasecmp 3 , 125.Xr strcat 3 , 126.Xr strchr 3 , 127.Xr strcmp 3 , 128.Xr strcpy 3 , 129.Xr strcspn 3 , 130.Xr strerror 3 , 131.Xr strlen 3 , 132.Xr strpbrk 3 , 133.Xr strrchr 3 , 134.Xr strsep 3 , 135.Xr strspn 3 , 136.Xr strstr 3 , 137.Xr strtok 3 138.Sh STANDARDS 139The 140.Fn strcat , 141.Fn strncat , 142.Fn strchr , 143.Fn strrchr , 144.Fn strcmp , 145.Fn strncmp , 146.Fn strcpy , 147.Fn strncpy , 148.Fn strerror , 149.Fn strlen , 150.Fn strpbrk , 151.Fn strspn , 152.Fn strcspn , 153.Fn strstr , 154and 155.Fn strtok 156functions 157conform to 158.St -isoC . 159