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.\" %sccs.include.redist.man% 7.\" 8.\" @(#)string.3 8.1 (Berkeley) 06/04/93 9.\" 10.Dd 11.Dt STRING 3 12.Os BSD 4 13.Sh NAME 14.Nm strcat , 15.Nm strncat , 16.Nm strchr , 17.Nm strrchr , 18.Nm strcmp , 19.Nm strncmp , 20.Nm strcasecmp, 21.Nm strncasecmp , 22.Nm strcpy , 23.Nm strncpy , 24.Nm strerror , 25.Nm strlen , 26.Nm strpbrk , 27.Nm strsep, 28.Nm strspn , 29.Nm strcspn , 30.Nm strstr , 31.Nm strtok , 32.Nm index , 33.Nm rindex 34.Nd string specific functions 35.Sh SYNOPSIS 36.Fd #include <string.h> 37.Ft char * 38.Fn strcat "char *s" "const char * append" 39.Ft char * 40.Fn strncat "char *s" "const char *append" "size_t count" 41.Ft char * 42.Fn strchr "const char *s" "int c" 43.Ft char * 44.Fn strrchr "const char *s" "int c" 45.Ft int 46.Fn strcmp "const char *s1" "const char *s2" 47.Ft int 48.Fn strncmp "const char *s1" "const char *s2" "size_t count" 49.Ft int 50.Fn strcasecmp "const char *s1" "const char *s2" 51.Ft int 52.Fn strncasecmp "const char *s1" "const char *s2" "size_t count" 53.Ft char * 54.Fn strcpy "char *dst" "const char *src" 55.Ft char * 56.Fn strncpy "char *dst" "const char *src" "size_t count" 57.Ft char * 58.Fn strerror "int errno" 59.Ft size_t 60.Fn strlen "const char *s" 61.Ft char * 62.Fn strpbrk "const char *s" "const char *charset" 63.Ft char * 64.Fn strsep "char **stringp" "const char *delim" 65.Ft size_t 66.Fn strspn "const char *s" "const char *charset" 67.Ft size_t 68.Fn strcspn "const char *s" "const char *charset" 69.Ft char * 70.Fn strstr "const char *big" "const char *little" 71.Ft char * 72.Fn strtok "char *s" "const char *delim" 73.Ft char * 74.Fn index "const char *s" "int c" 75.Ft char * 76.Fn rindex "const char *s" "int c" 77.Sh DESCRIPTION 78The string functions 79functions manipulate strings terminated by a 80null byte. 81.Pp 82See the specific manual pages for more information. 83For manipulating variable length generic objects as byte 84strings (without the null byte check), see 85.Xr bstring 3 . 86.Pp 87Except as noted in their specific manual pages, 88the string functions do not test the destination 89for size limitations. 90.Sh SEE ALSO 91.Xr index 3 , 92.Xr strcat 3 , 93.Xr strchr 3 , 94.Xr strrchr 3 , 95.Xr strcmp 3 , 96.Xr strcasecmp 3 , 97.Xr strcpy 3 , 98.Xr strerror 3 , 99.Xr strlen 3 , 100.Xr strpbrk 3 , 101.Xr strsep 3 , 102.Xr strspn 3 , 103.Xr strcspn 3 , 104.Xr strstr 3 , 105.Xr strtok 3 , 106.Xr rindex 3 107.Xr bstring 3 108.Sh STANDARDS 109The 110.Fn strcat , 111.Fn strncat , 112.Fn strchr , 113.Fn strrchr , 114.Fn strcmp , 115.Fn strncmp , 116.Fn strcpy , 117.Fn strncpy , 118.Fn strerror , 119.Fn strlen , 120.Fn strpbrk , 121.Fn strsep , 122.Fn strspn , 123.Fn strcspn , 124.Fn strstr , 125and 126.Fn strtok 127functions 128conform to 129.St -ansiC . 130