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--- old/usr/src/man/man3c/index.3c
+++ new/usr/src/man/man3c/index.3c
1 -'\" te
2 1 .\" Copyright (c) 2002, Sun Microsystems, Inc. All Rights Reserved Portions Copyright (c) 1992, X/Open Company Limited All Rights Reserved
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10 -.TH INDEX 3C "Jul 24, 2002"
11 -.SH NAME
12 -index, rindex \- string operations
13 -.SH SYNOPSIS
14 -.LP
15 -.nf
16 -#include <strings.h>
17 -
18 -\fBchar *\fR\fBindex\fR(\fBconst char *\fR\fIs\fR, \fBint\fR \fIc\fR);
19 -.fi
20 -
21 -.LP
22 -.nf
23 -\fBchar *\fR\fBrindex\fR(\fBconst char *\fR\fIs\fR, \fBint\fR \fIc\fR);
24 -.fi
25 -
26 -.SH DESCRIPTION
27 -.sp
28 -.LP
29 -The \fBindex()\fR and \fBrindex()\fR functions operate on null-terminated
30 -strings.
31 -.sp
32 -.LP
33 -The \fBindex()\fR function returns a pointer to the first occurrence of
34 -character \fIc\fR in string \fIs\fR.
35 -.sp
36 -.LP
37 -The \fBrindex()\fR function returns a pointer to the last occurrence of
38 -character \fIc\fR in string \fIs\fR.
39 -.sp
40 -.LP
41 -Both \fBindex()\fR and \fBrindex()\fR return a null pointer if \fIc\fR does
9 +.Dd "Jul 20, 2014"
10 +.Dt INDEX 3C
11 +.Os
12 +.Sh NAME
13 +.Nm index, rindex
14 +.Nd locate character in string
15 +.Sh SYNOPSIS
16 +.In strings.h
17 +.Ft char *
18 +.Fn index "const char *s" "int c"
19 +.Ft char *
20 +.Fn rindex "const char *s" "int c"
21 +.Sh DESCRIPTION
22 +The
23 +.Fn index
24 +and
25 +.Fn rindex
26 +functions operate on null-terminated strings.
27 +.Lp
28 +The
29 +.Fn index
30 +function returns a pointer to the first occurrence of
31 +character
32 +.Fa c
33 +in string
34 +.Fa s .
35 +.Lp
36 +The
37 +.Fn rindex
38 +function returns a pointer to the last occurrence of
39 +character
40 +.Fa c
41 +in string
42 +.Fa s .
43 +.Lp
44 +Both
45 +.Fn index
46 +and
47 +.Fa rindex
48 +return a null pointer if
49 +.Fa c
50 +does
42 51 not occur in the string. The null character terminating a string is considered
43 52 to be part of the string.
44 -.SH USAGE
45 -.sp
46 -.LP
47 -On most modern computer systems, you can \fInot\fR use a null pointer to
48 -indicate a null string. A null pointer is an error and results in an abort of
49 -the program. If you wish to indicate a null string, you must use a pointer
50 -that points to an explicit null string. On some machines and with some
51 -implementations of the C programming language, a null pointer, if dereferenced,
52 -would yield a null string. Though often used, this practice is not always
53 -portable. Programmers using a null pointer to represent an empty string should
54 -be aware of this portability issue. Even on machines where dereferencing a
55 -null pointer does not cause an abort of the program, it does not necessarily
56 -yield a null string.
57 -.SH ATTRIBUTES
58 -.sp
59 -.LP
60 -See \fBattributes\fR(5) for descriptions of the following attributes:
61 -.sp
62 -
63 -.sp
64 -.TS
65 -box;
66 -c | c
67 -l | l .
68 -ATTRIBUTE TYPE ATTRIBUTE VALUE
69 -_
70 -Interface Stability Standard
71 -.TE
72 -
73 -.SH SEE ALSO
74 -.sp
75 -.LP
76 -\fBbstring\fR(3C), \fBmalloc\fR(3C), \fBstring\fR(3C), \fBattributes\fR(5),
77 -\fBstandards\fR(5)
53 +.Sh USAGE
54 +The
55 +.Xr strchr 3C
56 +and
57 +.Xr strrchr 3C
58 +should be used in portable applications; those functions are specified in
59 +.St -isoC
60 +whereas these are not.
61 +.Sh INTERFACE STABILITY
62 +.Sy Obsolete Standard .
63 +.Sh MT-LEVEL
64 +.Sy Async-Signal-Safe .
65 +.Sh SEE ALSO
66 +.Xr bstring 3C ,
67 +.Xr malloc 3C ,
68 +.Xr string 3C ,
69 +.Xr standards 5
70 +.Sh STANDARDS
71 +These functions were part of
72 +.At v6 ,
73 +were added in
74 +.St -p1003.1-2001 ,
75 +and subsequently removed from
76 +.St -p1003.1-2008 .
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