string/string.3

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  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 $
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  33 .Dd December 11, 1993
  34 .Dt STRING 3
  35 .Os
  36 .Sh NAME
  37 .Nm index ,
  38 .Nm rindex ,
  39 .Nm stpcpy ,
  40 .Nm strcasecmp ,
  41 .Nm strcat ,
  42 .Nm strchr ,
  43 .Nm strcmp ,
  44 .Nm strcpy ,
  45 .Nm strcspn ,
  46 .Nm strerror ,
  47 .Nm strlen ,
  48 .Nm strncasecmp ,
  49 .Nm strncat ,
  50 .Nm strncmp ,
  51 .Nm strncpy ,
  52 .Nm strpbrk ,
  53 .Nm strrchr ,
  54 .Nm strsep ,
  55 .Nm strspn ,
  56 .Nm strstr ,
  57 .Nm strtok
  58 .Nd string specific functions
  59 .Sh LIBRARY
  60 .Lb libc
  61 .Sh SYNOPSIS
  62 .In strings.h
  63 .Ft char *
  64 .Fo index
  65 .Fa "const char *s"
  66 .Fa "int c"
  67 .Fc
  68 .Ft char *
  69 .Fo rindex
  70 .Fa "const char *s"
  71 .Fa "int c"
  72 .Fc
  73 .Ft int
  74 .Fo strcasecmp
  75 .Fa "const char *s1"
  76 .Fa "const char *s2"
  77 .Fc
  78 .Ft int
  79 .Fo strncasecmp
  80 .Fa "const char *s1"
  81 .Fa "const char *s2"
  82 .Fa "size_t n"
  83 .Fc
  84 .In string.h
  85 .Ft char *
  86 .Fo stpcpy
  87 .Fa "char *dst"
  88 .Fa "const char *src"
  89 .Fc
  90 .Ft char *
  91 .Fo strcat
  92 .Fa "char *restrict s1"
  93 .Fa "const char *restrict s2"
  94 .Fc
  95 .Ft char *
  96 .Fo strchr
  97 .Fa "const char *s"
  98 .Fa "int c"
  99 .Fc
 100 .Ft int
 101 .Fo strcmp
 102 .Fa "const char *s1"
 103 .Fa "const char *s2"
 104 .Fc
 105 .Ft char *
 106 .Fo strcpy
 107 .Fa "char *restrict s1"
 108 .Fa "const char *restrict s2"
 109 .Fc
 110 .Ft size_t
 111 .Fo strcspn
 112 .Fa "const char *s1"
 113 .Fa "const char *s2"
 114 .Fc
 115 .Ft char *
 116 .Fo strerror
 117 .Fa "int errnum"
 118 .Fc
 119 .Ft size_t
 120 .Fo strlen
 121 .Fa "const char *s"
 122 .Fc
 123 .Ft char *
 124 .Fo strncat
 125 .Fa "char *restrict s1"
 126 .Fa "const char *restrict s2"
 127 .Fa "size_t n"
 128 .Fc
 129 .Ft int
 130 .Fo strncmp
 131 .Fa "const char *s1"
 132 .Fa "const char *s2"
 133 .Fa "size_t n"
 134 .Fc
 135 .Ft char *
 136 .Fo strncpy
 137 .Fa "char *restrict s1"
 138 .Fa "const char *restrict s2"
 139 .Fa "size_t n"
 140 .Fc
 141 .Ft char *
 142 .Fo strpbrk
 143 .Fa "const char *s1"
 144 .Fa "const char *s2"
 145 .Fc
 146 .Ft char *
 147 .Fo strrchr
 148 .Fa "const char *s"
 149 .Fa "int c"
 150 .Fc
 151 .Ft char *
 152 .Fo strsep
 153 .Fa "char **stringp"
 154 .Fa "const char *delim"
 155 .Fc
 156 .Ft size_t
 157 .Fo strspn
 158 .Fa "const char *s1"
 159 .Fa "const char *s2"
 160 .Fc
 161 .Ft char *
 162 .Fo strstr
 163 .Fa "const char *s1"
 164 .Fa "const char *s2"
 165 .Fc
 166 .Ft char *
 167 .Fo strtok
 168 .Fa "char *restrict s1"
 169 .Fa "const char *restrict s2"
 170 .Fc
 171 .Sh DESCRIPTION
 172 The string
 173 functions manipulate strings that are terminated by a
 174 null byte.
 175 .Pp
 176 See the specific manual pages for more information.
 177 For manipulating variable length generic objects as byte
 178 strings (without the null byte check), see
 179 .Xr bstring 3 .
 180 .Pp
 181 Except as noted in their specific manual pages,
 182 the string functions do not test the destination
 183 for size limitations.
 184 .Sh SEE ALSO
 185 .Xr bstring 3 ,
 186 .Xr index 3 ,
 187 .Xr rindex 3 ,
 188 .Xr stpcpy 3 ,
 189 .Xr strcasecmp 3 ,
 190 .Xr strcat 3 ,
 191 .Xr strchr 3 ,
 192 .Xr strcmp 3 ,
 193 .Xr strcpy 3 ,
 194 .Xr strcspn 3 ,
 195 .Xr strerror 3 ,
 196 .Xr strlen 3 ,
 197 .Xr strpbrk 3 ,
 198 .Xr strrchr 3 ,
 199 .Xr strsep 3 ,
 200 .Xr strspn 3 ,
 201 .Xr strstr 3 ,
 202 .Xr strtok 3
 203 .Sh STANDARDS
 204 The
 205 .Fn strcat ,
 206 .Fn strncat ,
 207 .Fn strchr ,
 208 .Fn strrchr ,
 209 .Fn strcmp ,
 210 .Fn strncmp ,
 211 .Fn strcpy ,
 212 .Fn strncpy ,
 213 .Fn strerror ,
 214 .Fn strlen ,
 215 .Fn strpbrk ,
 216 .Fn strspn ,
 217 .Fn strcspn ,
 218 .Fn strstr ,
 219 and
 220 .Fn strtok
 221 functions
 222 conform to
 223 .St -isoC .