- Update the manual pages of index() and rindex() to show

   <strings.h> as the associated header file.
   The prototypes have been moved there from <string.h> because
   POSIX.1-2001 said so.
 - Conditionally include either <strings.h> or <string.h> based
   on whether the [r]index() or str[r]chr() functions are
   compiled, respectively.
 - Style(9) tells us to
    - put a space after the return keyword
    - to check for a NUL character without using the ! operator.
    - use NULL instead of (type *)NULL where the compiler knows
      the type.
   Apply these rules.
 - Rather use ANSI-C function definitions than K&R ones.
 - For index(3), correct second function argument's type; it was
   declared to be a `const char' before and is now an `int'.

1 files changed, 8 insertions, 1 deletions

diff --git a/lib/libc/string/index.3 b/lib/libc/string/index.3
index 902b19c..0102fa6 100644
--- a/lib/libc/string/index.3
+++ b/lib/libc/string/index.3
@@ -43,7 +43,7 @@
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
-.In string.h
+.In strings.h
 .Ft char *
 .Fn index "const char *s" "int c"
 .Sh DESCRIPTION
@@ -81,3 +81,10 @@ A
 .Fn index
 function appeared in
 .At v6 .
+Its prototype existed previously in
+.Aq Pa string.h
+before it was moved to
+.Aq Pa strings.h
+for
+.St -p1003.1-2001
+compliance.