some repairs, add example to strdup(3) page

src/lib/libc/string/strcat.3

@@ -33,13 +33,14 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strcat.3,v 1.5 1999/03/06 23:41:13 millert Exp $
+.\"	$OpenBSD: strcat.3,v 1.6 1999/06/04 19:14:55 aaron Exp $
 .\"
 .Dd July 8, 1997
 .Dt STRCAT 3
 .Os
 .Sh NAME
-.Nm strcat
+.Nm strcat,
+.Nm strncat
 .Nd concatenate strings
 .Sh SYNOPSIS
 .Fd #include <string.h>

src/lib/libc/string/strcmp.3

@@ -33,13 +33,14 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strcmp.3,v 1.2 1996/08/19 08:34:11 tholo Exp $
+.\"	$OpenBSD: strcmp.3,v 1.3 1999/06/04 19:14:56 aaron Exp $
 .\"
 .Dd June 29, 1991
 .Dt STRCMP 3
 .Os
 .Sh NAME
-.Nm strcmp
+.Nm strcmp,
+.Nm strncmp
 .Nd compare strings
 .Sh SYNOPSIS
 .Fd #include <string.h>
@@ -72,9 +73,8 @@ The comparison is done using unsigned characters, so that
 is greater than
 .Ql \e0 .
 .Pp
-The
 .Fn strncmp
-compares not more than
+compares at most
 .Fa len
 characters.
 .Sh SEE ALSO

src/lib/libc/string/strcpy.3

@@ -33,13 +33,14 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strcpy.3,v 1.6 1999/05/23 14:11:03 aaron Exp $
+.\"	$OpenBSD: strcpy.3,v 1.7 1999/06/04 19:14:56 aaron Exp $
 .\"
 .Dd June 29, 1991
 .Dt STRCPY 3
 .Os
 .Sh NAME
-.Nm strcpy
+.Nm strcpy,
+.Nm strncpy
 .Nd copy strings
 .Sh SYNOPSIS
 .Fd #include <string.h>
@@ -61,7 +62,6 @@ to
 .Ql \e0
 character).
 .Pp
-The
 .Fn strncpy
 copies not more than
 .Fa len
@@ -105,10 +105,10 @@ to
 .Dq Li abcdef
 and does
 .Em not
-NUL-terminate chararray because the source string is >= the length parameter.
+null terminate chararray because the source string is >= the length parameter.
 .Fn strncpy
 .Em only
-NUL-terminates the destination string when then length of the source
+null terminates the destination string when then length of the source
 string is less than the length parameter.
 .Bd -literal -offset indent
 (void)strncpy(chararray, "abcdefgh", 6);
@@ -118,11 +118,11 @@ The following copies as many characters from
 .Dq Li input
 to
 .Dq Li buf
-as will fit and NUL-terminates the result.  Because
+as will fit and null terminates the result.  Because
 .Fn strncpy
 does
 .Em not
-guarantee to NUL-terminate the string itself, we must do this by hand.
+guarantee to null terminate the string itself, we must do this by hand.
 .Bd -literal -offset indent
 char buf[BUFSIZ];
 

src/lib/libc/string/strdup.3

@@ -1,4 +1,4 @@
-.\" $OpenBSD: strdup.3,v 1.6 1998/08/19 05:51:14 pjanzen Exp $
+.\" $OpenBSD: strdup.3,v 1.7 1999/06/04 19:14:56 aaron Exp $
 .\"
 .\" Copyright (c) 1990, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -42,20 +42,32 @@
 .Sh SYNOPSIS
 .Fd #include <string.h>
 .Ft char *
-.Fn strdup "const char *str"
+.Fn strdup "const char *s"
 .Sh DESCRIPTION
 The
 .Fn strdup
 function
 allocates sufficient memory for a copy
 of the string
-.Fa str ,
+.Fa s ,
 does the copy, and returns a pointer to it.
 The pointer may subsequently be used as an
 argument to the function
 .Xr free 3 .
 .Pp
-If insufficient memory is available, NULL is returned.
+If insufficient memory is available,
+.Dv NULL
+is returned.
+.Sh EXAMPLES
+The following will point
+.Va p
+to an allocated area of memory containing the null-terminated string
+.Qq foobar :
+.Bd -literal -offset indent
+char *p;
+
+p = strdup("foobar");
+.Ed
 .Sh SEE ALSO
 .Xr free 3 ,
 .Xr malloc 3 ,

src/lib/libc/string/strlen.3

@@ -33,14 +33,14 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strlen.3,v 1.2 1996/08/19 08:34:19 tholo Exp $
+.\"	$OpenBSD: strlen.3,v 1.3 1999/06/04 19:14:56 aaron Exp $
 .\"
 .Dd June 29, 1991
 .Dt STRLEN 3
 .Os
 .Sh NAME
 .Nm strlen
-.Nd find length of string
+.Nd find length of a string
 .Sh SYNOPSIS
 .Fd #include <string.h>
 .Ft size_t
@@ -57,8 +57,7 @@ The
 function
 returns
 the number of characters that precede the
-terminating
-.Dv NUL
+terminating NUL
 character.
 .Sh SEE ALSO
 .Xr string 3

src/lib/libc/string/strsep.3

@@ -1,4 +1,4 @@
-.\" $OpenBSD: strsep.3,v 1.4 1998/06/15 17:55:14 mickey Exp $
+.\" $OpenBSD: strsep.3,v 1.5 1999/06/04 19:14:56 aaron Exp $
 .\"
 .\" Copyright (c) 1990, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -58,13 +58,17 @@ the first occurrence of any character in the string
 character) and replaces it with a
 .Ql \e0 .
 The location of the next character after the delimiter character
-(or NULL, if the end of the string was reached) is stored in
+(or
+.Dv NULL ,
+if the end of the string was reached) is stored in
 .Fa *stringp .
 The original value of
 .Fa *stringp
 is returned.
 .Pp
-An ``empty'' field, i.e. one caused by two adjacent delimiter characters,
+An
+.Dq empty
+field, i.e., one caused by two adjacent delimiter characters,
 can be detected by comparing the location referenced by the pointer returned
 in
 .Fa *stringp
@@ -101,7 +105,7 @@ While the
 .Fn strtok
 function should be preferred for portability reasons (it conforms to
 .St -ansiC )
-it is unable to handle empty fields, i.e. detect fields delimited by
+it is unable to handle empty fields, i.e., detect fields delimited by
 two adjacent delimiter characters, or to be used for more than a single
 string at a time.
 The

src/lib/libc/string/strtok.3

@@ -33,14 +33,13 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strtok.3,v 1.4 1999/05/23 14:11:03 aaron Exp $
+.\"	$OpenBSD: strtok.3,v 1.5 1999/06/04 19:14:56 aaron Exp $
 .\"
 .Dd June 29, 1991
 .Dt STRTOK 3
 .Os
 .Sh NAME
-.Nm strtok ,
-.Nm strsep
+.Nm strtok
 .Nd string token operations
 .Sh SYNOPSIS
 .Fd #include <string.h>
@@ -104,9 +103,7 @@ if handed a string containing only delimiter characters,
 will not alter the next starting point, so that a call to
 .Fn strtok
 with a different (or empty) delimiter string
-may return a
-.Pf non- Dv NULL
-value.
+may return a non-null value.
 Since this implementation always alters the next starting point,
 such a sequence of calls would always return
 .Dv NULL .