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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 and the American National Standards Committee X3, | |
6 | .\" on Information Processing Systems. | |
7 | .\" | |
8 | .\" Redistribution and use in source and binary forms, with or without | |
9 | .\" modification, are permitted provided that the following conditions | |
10 | .\" are met: | |
11 | .\" 1. Redistributions of source code must retain the above copyright | |
12 | .\" notice, this list of conditions and the following disclaimer. | |
13 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
14 | .\" notice, this list of conditions and the following disclaimer in the | |
15 | .\" documentation and/or other materials provided with the distribution. | |
16 | .\" 4. Neither the name of the University nor the names of its contributors | |
17 | .\" may be used to endorse or promote products derived from this software | |
18 | .\" without specific prior written permission. | |
19 | .\" | |
20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
21 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
22 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
24 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
26 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
28 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
30 | .\" SUCH DAMAGE. | |
31 | .\" | |
32 | .\" @(#)strchr.3 8.2 (Berkeley) 4/19/94 | |
33 | .\" $FreeBSD: src/lib/libc/string/strchr.3,v 1.14 2009/04/07 13:42:53 trasz Exp $ | |
34 | .\" | |
35 | .Dd April 19, 1994 | |
36 | .Dt STRCHR 3 | |
37 | .Os | |
38 | .Sh NAME | |
39 | .Nm strchr , strrchr | |
40 | .Nd locate character in string | |
41 | .Sh LIBRARY | |
42 | .Lb libc | |
43 | .Sh SYNOPSIS | |
44 | .In string.h | |
45 | .Ft "char *" | |
46 | .Fn strchr "const char *s" "int c" | |
47 | .Ft "char *" | |
48 | .Fn strrchr "const char *s" "int c" | |
49 | .Sh DESCRIPTION | |
50 | The | |
51 | .Fn strchr | |
52 | function locates the first occurrence of | |
53 | .Fa c | |
54 | (converted to a | |
55 | .Vt char ) | |
56 | in the string pointed to by | |
57 | .Fa s . | |
58 | The terminating null character is considered part of the string; | |
59 | therefore if | |
60 | .Fa c | |
61 | is | |
62 | .Ql \e0 , | |
63 | the functions locate the terminating | |
64 | .Ql \e0 . | |
65 | .Pp | |
66 | The | |
67 | .Fn strrchr | |
68 | function is identical to | |
69 | .Fn strchr | |
70 | except it locates the last occurrence of | |
71 | .Fa c . | |
72 | .Sh RETURN VALUES | |
73 | The functions | |
74 | .Fn strchr | |
75 | and | |
76 | .Fn strrchr | |
77 | return a pointer to the located character, or | |
78 | .Dv NULL | |
79 | if the character does not appear in the string. | |
80 | .Sh SEE ALSO | |
81 | .Xr memchr 3 , | |
82 | .Xr memmem 3 , | |
83 | .Xr strcspn 3 , | |
84 | .Xr strpbrk 3 , | |
85 | .Xr strsep 3 , | |
86 | .Xr strspn 3 , | |
87 | .Xr strstr 3 , | |
88 | .Xr strtok 3 , | |
89 | .Xr wcschr 3 | |
90 | .Sh STANDARDS | |
91 | The functions | |
92 | .Fn strchr | |
93 | and | |
94 | .Fn strrchr | |
95 | conform to | |
96 | .St -isoC . |