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. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" @(#)string.3 8.2 (Berkeley) 12/11/93 35.\" $FreeBSD: src/lib/libc/string/string.3,v 1.6.2.4 2001/12/14 18:33:59 ru Exp $ 36.\" $DragonFly: src/lib/libc/string/string.3,v 1.2 2003/06/17 04:26:46 dillon Exp $ 37.\" 38.Dd December 11, 1993 39.Dt STRING 3 40.Os 41.Sh NAME 42.Nm strcat , 43.Nm strncat , 44.Nm strchr , 45.Nm strrchr , 46.Nm strcmp , 47.Nm strncmp , 48.Nm strcasecmp , 49.Nm strncasecmp , 50.Nm strcpy , 51.Nm strncpy , 52.Nm strerror , 53.Nm strlen , 54.Nm strpbrk , 55.Nm strsep , 56.Nm strspn , 57.Nm strcspn , 58.Nm strstr , 59.Nm strtok , 60.Nm index , 61.Nm rindex 62.Nd string specific functions 63.Sh LIBRARY 64.Lb libc 65.Sh SYNOPSIS 66.In string.h 67.Ft char * 68.Fn strcat "char *s" "const char * append" 69.Ft char * 70.Fn strncat "char *s" "const char *append" "size_t count" 71.Ft char * 72.Fn strchr "const char *s" "int c" 73.Ft char * 74.Fn strrchr "const char *s" "int c" 75.Ft int 76.Fn strcmp "const char *s1" "const char *s2" 77.Ft int 78.Fn strncmp "const char *s1" "const char *s2" "size_t count" 79.Ft int 80.Fn strcasecmp "const char *s1" "const char *s2" 81.Ft int 82.Fn strncasecmp "const char *s1" "const char *s2" "size_t count" 83.Ft char * 84.Fn strcpy "char *dst" "const char *src" 85.Ft char * 86.Fn strncpy "char *dst" "const char *src" "size_t count" 87.Ft char * 88.Fn strerror "int errno" 89.Ft size_t 90.Fn strlen "const char *s" 91.Ft char * 92.Fn strpbrk "const char *s" "const char *charset" 93.Ft char * 94.Fn strsep "char **stringp" "const char *delim" 95.Ft size_t 96.Fn strspn "const char *s" "const char *charset" 97.Ft size_t 98.Fn strcspn "const char *s" "const char *charset" 99.Ft char * 100.Fn strstr "const char *big" "const char *little" 101.Ft char * 102.Fn strtok "char *s" "const char *delim" 103.Ft char * 104.Fn index "const char *s" "int c" 105.Ft char * 106.Fn rindex "const char *s" "int c" 107.Sh DESCRIPTION 108The string 109functions manipulate strings terminated by a 110null byte. 111.Pp 112See the specific manual pages for more information. 113For manipulating variable length generic objects as byte 114strings (without the null byte check), see 115.Xr bstring 3 . 116.Pp 117Except as noted in their specific manual pages, 118the string functions do not test the destination 119for size limitations. 120.Sh SEE ALSO 121.Xr bstring 3 , 122.Xr index 3 , 123.Xr rindex 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 strsep , 152.Fn strspn , 153.Fn strcspn , 154.Fn strstr , 155and 156.Fn strtok 157functions 158conform to 159.St -isoC . 160