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diff --git a/lib/libc/compat-43/sigvec.2 b/lib/libc/compat-43/sigvec.2
--- a/lib/libc/compat-43/sigvec.2
+++ b/lib/libc/compat-43/sigvec.2
@@ -28,7 +28,7 @@
.\" @(#)sigvec.2 8.2 (Berkeley) 4/19/94
.\" $FreeBSD$
.\"
-.Dd April 19, 1994
+.Dd April 2, 2022
.Dt SIGVEC 2
.Os
.Sh NAME
@@ -338,5 +338,14 @@
.Xr signal 3 ,
.Xr sigsetops 3 ,
.Xr tty 4
+.Sh HISTORY
+A
+.Fn sigvec
+system call first appeared in
+.Bx 4.2 .
+It was reimplemented as a wrapper around
+.Xr sigaction 2
+in
+.Bx 4.3 Reno .
.Sh BUGS
This manual page is still confusing.
diff --git a/lib/libc/db/man/dbm.3 b/lib/libc/db/man/dbm.3
--- a/lib/libc/db/man/dbm.3
+++ b/lib/libc/db/man/dbm.3
@@ -15,7 +15,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd May 30, 2016
+.Dd April 2, 2022
.Dt DBM 3
.Os
.Sh NAME
@@ -224,3 +224,14 @@
.Fn dbm_dirfno )
are included in the
.St -susv2 .
+.Sh HISTORY
+The functions
+.Fn dbminit ,
+.Fn fetch ,
+.Fn store ,
+.Fn delete ,
+.Fn firstkey ,
+and
+.Fn nextkey
+first appeared in
+.At v7 .
diff --git a/lib/libc/gen/alarm.3 b/lib/libc/gen/alarm.3
--- a/lib/libc/gen/alarm.3
+++ b/lib/libc/gen/alarm.3
@@ -28,7 +28,7 @@
.\" @(#)alarm.3 8.2 (Berkeley) 4/19/94
.\" $FreeBSD$
.\"
-.Dd April 19, 1994
+.Dd April 2, 2022
.Dt ALARM 3
.Os
.Sh NAME
@@ -89,5 +89,11 @@
.Sh HISTORY
An
.Fn alarm
-function appeared in
+system call appeared in the Programmer's Workbench (PWB/UNIX)
+and was ported to
.At v7 .
+For
+.Bx 4.1c ,
+it was reimplemented as a wrapper around the
+.Xr setitimer 2
+system call.
diff --git a/lib/libc/gen/fnmatch.3 b/lib/libc/gen/fnmatch.3
--- a/lib/libc/gen/fnmatch.3
+++ b/lib/libc/gen/fnmatch.3
@@ -30,7 +30,7 @@
.\" @(#)fnmatch.3 8.3 (Berkeley) 4/28/95
.\" $FreeBSD$
.\"
-.Dd July 18, 2004
+.Dd April 2, 2022
.Dt FNMATCH 3
.Os
.Sh NAME
@@ -139,6 +139,10 @@
Collating symbol expressions, equivalence class expressions and
character class expressions are not supported.
.Sh HISTORY
+A predecessor to
+.Fn fnmatch ,
+.Fn gmatch ,
+first appeared in the Programmer's Workbench (PWB/UNIX).
The
.Fn fnmatch
function first appeared in
diff --git a/lib/libc/gen/pause.3 b/lib/libc/gen/pause.3
--- a/lib/libc/gen/pause.3
+++ b/lib/libc/gen/pause.3
@@ -28,7 +28,7 @@
.\" @(#)pause.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd June 4, 1993
+.Dd April 3, 2022
.Dt PAUSE 3
.Os
.Sh NAME
@@ -77,6 +77,18 @@
.Sh HISTORY
A
.Fn pause
-syscall
-appeared in
-.At v6 .
+system call first appeared in the Programmer's Workbench (PWB/UNIX)
+and was then ported to
+.At v7 .
+It was reimplemeted as a wrapper around the
+.Fn sigpause
+and
+.Fn sigblock
+system calls in
+.Bx 4.2 ,
+and around the
+.Xr sigsuspend 2
+and
+.Xr sigprocmask 2
+system calls in
+.Bx 4.3 Reno .
diff --git a/lib/libc/gen/setjmp.3 b/lib/libc/gen/setjmp.3
--- a/lib/libc/gen/setjmp.3
+++ b/lib/libc/gen/setjmp.3
@@ -32,7 +32,7 @@
.\" @(#)setjmp.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd June 4, 1993
+.Dd April 2, 2022
.Dt SETJMP 3
.Os
.Sh NAME
@@ -170,3 +170,9 @@
.Fn siglongjmp
functions conform to
.St -p1003.1-88 .
+.Sh HISTORY
+The
+.Fn setjmp
+and
+.Fn longjmp
+functions first appeared in the Programmer's Workbench (PWB/UNIX).
diff --git a/lib/libc/locale/ctype.3 b/lib/libc/locale/ctype.3
--- a/lib/libc/locale/ctype.3
+++ b/lib/libc/locale/ctype.3
@@ -28,7 +28,7 @@
.\" @(#)ctype.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd March 30, 2004
+.Dd April 3, 2022
.Dt CTYPE 3
.Os
.Sh NAME
@@ -149,3 +149,18 @@
.Fn toascii ,
conform to
.St -isoC .
+.Sh HISTORY
+The functions
+.Fn isalpha ,
+.Fn isupper ,
+.Fn islower ,
+.Fn isdigit ,
+.Fn isalnum ,
+.Fn isspace ,
+.Fn ispunct ,
+.Fn isprint ,
+.Fn iscntrl ,
+and
+.Fn isascii
+first appeared in
+.At v7 .
diff --git a/lib/libc/locale/isalnum.3 b/lib/libc/locale/isalnum.3
--- a/lib/libc/locale/isalnum.3
+++ b/lib/libc/locale/isalnum.3
@@ -32,7 +32,7 @@
.\" @(#)isalnum.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd July 17, 2005
+.Dd April 2, 2022
.Dt ISALNUM 3
.Os
.Sh NAME
@@ -113,3 +113,8 @@
.Fn isalnum_l
function conforms to
.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn isalnum
+function first appeared in
+.At v7 .
diff --git a/lib/libc/locale/isascii.3 b/lib/libc/locale/isascii.3
--- a/lib/libc/locale/isascii.3
+++ b/lib/libc/locale/isascii.3
@@ -28,7 +28,7 @@
.\" @(#)isascii.3 8.2 (Berkeley) 12/11/93
.\" $FreeBSD$
.\"
-.Dd October 6, 2002
+.Dd April 2, 2022
.Dt ISASCII 3
.Os
.Sh NAME
@@ -51,3 +51,8 @@
.Xr ctype 3 ,
.Xr iswascii 3 ,
.Xr ascii 7
+.Sh HISTORY
+The
+.Fn isascii
+function first appeared in
+.At v7 .
diff --git a/lib/libc/locale/iscntrl.3 b/lib/libc/locale/iscntrl.3
--- a/lib/libc/locale/iscntrl.3
+++ b/lib/libc/locale/iscntrl.3
@@ -32,7 +32,7 @@
.\" @(#)iscntrl.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd July 17, 2005
+.Dd April 2, 2022
.Dt ISCNTRL 3
.Os
.Sh NAME
@@ -101,3 +101,8 @@
.Fn iscntrl_l
function conforms to
.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn iscntrl
+function first appeared in
+.At v7 .
diff --git a/lib/libc/locale/islower.3 b/lib/libc/locale/islower.3
--- a/lib/libc/locale/islower.3
+++ b/lib/libc/locale/islower.3
@@ -32,7 +32,7 @@
.\" @(#)islower.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd July 30, 2012
+.Dd April 2, 2022
.Dt ISLOWER 3
.Os
.Sh NAME
@@ -101,3 +101,8 @@
.Fn islower_l
function conforms to
.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn islower
+function first appeared in
+.At v7 .
diff --git a/lib/libc/locale/isprint.3 b/lib/libc/locale/isprint.3
--- a/lib/libc/locale/isprint.3
+++ b/lib/libc/locale/isprint.3
@@ -32,7 +32,7 @@
.\" @(#)isprint.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd July 17, 2005
+.Dd April 2, 2022
.Dt ISPRINT 3
.Os
.Sh NAME
@@ -101,3 +101,8 @@
.Fn isprint
function conforms to
.St -isoC .
+.Sh HISTORY
+The
+.Fn isprint
+function first appeared in
+.At v7 .
diff --git a/lib/libc/locale/ispunct.3 b/lib/libc/locale/ispunct.3
--- a/lib/libc/locale/ispunct.3
+++ b/lib/libc/locale/ispunct.3
@@ -32,7 +32,7 @@
.\" @(#)ispunct.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd July 30, 2012
+.Dd April 2, 2022
.Dt ISPUNCT 3
.Os
.Sh NAME
@@ -107,3 +107,8 @@
.Fn ispunct_l
function conforms to
.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn ispunct
+function first appeared in
+.At v7 .
diff --git a/lib/libc/locale/isspace.3 b/lib/libc/locale/isspace.3
--- a/lib/libc/locale/isspace.3
+++ b/lib/libc/locale/isspace.3
@@ -32,7 +32,7 @@
.\" @(#)isspace.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd July 30, 2012
+.Dd April 2, 2022
.Dt ISSPACE 3
.Os
.Sh NAME
@@ -99,3 +99,8 @@
.Fn isspace_l
function conforms to
.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn isspace
+function first appeared in
+.At v7 .
diff --git a/lib/libc/locale/isupper.3 b/lib/libc/locale/isupper.3
--- a/lib/libc/locale/isupper.3
+++ b/lib/libc/locale/isupper.3
@@ -32,7 +32,7 @@
.\" @(#)isupper.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd July 17, 2005
+.Dd April 2, 2022
.Dt ISUPPER 3
.Os
.Sh NAME
@@ -88,3 +88,8 @@
.Fn isupper
function conforms to
.St -isoC .
+.Sh HISTORY
+The
+.Fn isupper
+function first appeared in
+.At v7 .
diff --git a/lib/libc/stdio/ferror.3 b/lib/libc/stdio/ferror.3
--- a/lib/libc/stdio/ferror.3
+++ b/lib/libc/stdio/ferror.3
@@ -32,7 +32,7 @@
.\" @(#)ferror.3 8.2 (Berkeley) 4/19/94
.\" $FreeBSD$
.\"
-.Dd January 28, 2009
+.Dd April 2, 2022
.Dt FERROR 3
.Os
.Sh NAME
@@ -129,3 +129,12 @@
.Fn ferror
conform to
.St -isoC .
+.Sh HISTORY
+The functions
+.Fn clearerr ,
+.Fn feof ,
+.Fn ferror ,
+and
+.Fn fileno
+first appeared in
+.At v7 .
diff --git a/lib/libc/stdio/fgets.3 b/lib/libc/stdio/fgets.3
--- a/lib/libc/stdio/fgets.3
+++ b/lib/libc/stdio/fgets.3
@@ -32,7 +32,7 @@
.\" @(#)fgets.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd September 1, 2019
+.Dd April 2, 2022
.Dt FGETS 3
.Os
.Sh NAME
@@ -147,3 +147,10 @@
.Fn gets
has been removed from
.St -isoC-2011 .
+.Sh HISTORY
+The functions
+.Fn fgets
+and
+.Fn gets
+first appeared in
+.At v7 .
diff --git a/lib/libc/stdio/fread.3 b/lib/libc/stdio/fread.3
--- a/lib/libc/stdio/fread.3
+++ b/lib/libc/stdio/fread.3
@@ -32,7 +32,7 @@
.\" @(#)fread.3 8.2 (Berkeley) 3/8/94
.\" $FreeBSD$
.\"
-.Dd January 23, 2020
+.Dd April 2, 2022
.Dt FREAD 3
.Os
.Sh NAME
@@ -124,3 +124,10 @@
.Fn fwrite
conform to
.St -isoC .
+.Sh HISTORY
+The functions
+.Fn fread
+and
+.Fn fwrite
+first appeared in
+.At v7 .
diff --git a/lib/libc/stdio/fseek.3 b/lib/libc/stdio/fseek.3
--- a/lib/libc/stdio/fseek.3
+++ b/lib/libc/stdio/fseek.3
@@ -32,7 +32,7 @@
.\" @(#)fseek.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd March 19, 2004
+.Dd April 2, 2022
.Dt FSEEK 3
.Os
.Sh NAME
@@ -267,3 +267,11 @@
.Fn ftello
functions conform to
.St -p1003.1-2001 .
+.Sh HISTORY
+The functions
+.Fn fseek ,
+.Fn ftell ,
+and
+.Fn rewind
+first appeared in
+.At v7 .
diff --git a/lib/libc/stdio/scanf.3 b/lib/libc/stdio/scanf.3
--- a/lib/libc/stdio/scanf.3
+++ b/lib/libc/stdio/scanf.3
@@ -32,7 +32,7 @@
.\" @(#)scanf.3 8.2 (Berkeley) 12/11/93
.\" $FreeBSD$
.\"
-.Dd January 4, 2003
+.Dd April 2, 2022
.Dt SCANF 3
.Os
.Sh NAME
@@ -474,6 +474,21 @@
.Fn vsscanf
conform to
.St -isoC-99 .
+.Sh HISTORY
+The functions
+.Fn scanf ,
+.Fn fscanf ,
+and
+.Fn sscanf
+first appeared in
+.At v7 ,
+and
+.Fn vscanf ,
+.Fn vsscanf ,
+and
+.Fn vfscanf
+in
+.Bx 4.3 Reno .
.Sh BUGS
Earlier implementations of
.Nm
diff --git a/lib/libc/stdlib/abs.3 b/lib/libc/stdlib/abs.3
--- a/lib/libc/stdlib/abs.3
+++ b/lib/libc/stdlib/abs.3
@@ -32,7 +32,7 @@
.\" @(#)abs.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd November 14, 2001
+.Dd April 3, 2022
.Dt ABS 3
.Os
.Sh NAME
@@ -71,5 +71,10 @@
.Fn abs
function conforms to
.St -isoC-99 .
+.Sh HISTORY
+The
+.Fn abs
+function first appeared in
+.At v6 .
.Sh BUGS
The absolute value of the most negative integer remains negative.
diff --git a/lib/libc/stdlib/ldiv.3 b/lib/libc/stdlib/ldiv.3
--- a/lib/libc/stdlib/ldiv.3
+++ b/lib/libc/stdlib/ldiv.3
@@ -32,7 +32,7 @@
.\" @(#)ldiv.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd November 14, 2001
+.Dd April 3, 2022
.Dt LDIV 3
.Os
.Sh NAME
@@ -69,3 +69,9 @@
function
conforms to
.St -isoC-99 .
+.Sh HISTORY
+An
+.Fn ldiv
+function with similar functionality, but a different calling convention,
+first appeared in
+.At v4 .
diff --git a/lib/libc/string/strcat.3 b/lib/libc/string/strcat.3
--- a/lib/libc/string/strcat.3
+++ b/lib/libc/string/strcat.3
@@ -32,7 +32,7 @@
.\" @(#)strcat.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd December 1, 2009
+.Dd April 3, 2022
.Dt STRCAT 3
.Os
.Sh NAME
@@ -107,6 +107,15 @@
functions
conform to
.St -isoC .
+.Sh HISTORY
+The
+.Fn strcat
+function first appeared in the Programmer's Workbench (PWB/UNIX)
+and was ported to
+.At v7 ;
+.Fn strncat
+first appeared in
+.At v7 .
.Sh SECURITY CONSIDERATIONS
The
.Fn strcat
diff --git a/lib/libc/string/strcmp.3 b/lib/libc/string/strcmp.3
--- a/lib/libc/string/strcmp.3
+++ b/lib/libc/string/strcmp.3
@@ -32,7 +32,7 @@
.\" @(#)strcmp.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd October 11, 2001
+.Dd April 3, 2022
.Dt STRCMP 3
.Os
.Sh NAME
@@ -99,3 +99,12 @@
functions
conform to
.St -isoC .
+.Sh HISTORY
+The
+.Fn strcmp
+function first appeared in the Programmer's Workbench (PWB/UNIX)
+and was ported to
+.At v7 ;
+.Fn strncmp
+first appeared in
+.At v7 .
diff --git a/lib/libc/string/strlen.3 b/lib/libc/string/strlen.3
--- a/lib/libc/string/strlen.3
+++ b/lib/libc/string/strlen.3
@@ -32,7 +32,7 @@
.\" @(#)strlen.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd February 28, 2009
+.Dd April 3, 2022
.Dt STRLEN 3
.Os
.Sh NAME
@@ -91,3 +91,11 @@
.Fn strnlen
function conforms to
.St -p1003.1-2008 .
+.Sh HISTORY
+The
+.Fn strlen
+function first appeared in the Programmer's Workbench (PWB/UNIX)
+and was ported to
+.At v7 .
+The
+.Fn strnlen
diff --git a/lib/libc/sys/nanosleep.2 b/lib/libc/sys/nanosleep.2
--- a/lib/libc/sys/nanosleep.2
+++ b/lib/libc/sys/nanosleep.2
@@ -30,7 +30,7 @@
.\" @(#)sleep.3 8.1 (Berkeley) 6/4/93
.\" $FreeBSD$
.\"
-.Dd October 7, 2021
+.Dd April 3, 2022
.Dt NANOSLEEP 2
.Os
.Sh NAME
@@ -203,3 +203,20 @@
.Sh STANDARDS
These functions conform to
.St -p1003.1-2008 .
+.Sh HISTORY
+The predecessor of this system call,
+.Fn sleep ,
+appeared in
+.At v3 ,
+but was removed when
+.Xr alarm 3
+was introduced into
+.At v7 .
+The
+.Fn nanosleep
+system call has been available since
+.Nx 1.3
+and was ported to
+.Ox 2.1
+and
+.Fx 3.0 .
diff --git a/lib/msun/man/cosh.3 b/lib/msun/man/cosh.3
--- a/lib/msun/man/cosh.3
+++ b/lib/msun/man/cosh.3
@@ -28,7 +28,7 @@
.\" from: @(#)cosh.3 5.1 (Berkeley) 5/2/91
.\" $FreeBSD$
.\"
-.Dd August 17, 2013
+.Dd April 3, 2022
.Dt COSH 3
.Os
.Sh NAME
@@ -71,3 +71,8 @@
.Fn cosh
function conforms to
.St -isoC .
+.Sh HISTORY
+The
+.Fn cosh
+function first appeared in
+.At v7 .
diff --git a/lib/msun/man/floor.3 b/lib/msun/man/floor.3
--- a/lib/msun/man/floor.3
+++ b/lib/msun/man/floor.3
@@ -28,7 +28,7 @@
.\" from: @(#)floor.3 6.5 (Berkeley) 4/19/91
.\" $FreeBSD$
.\"
-.Dd January 13, 2005
+.Dd April 3, 2022
.Dt FLOOR 3
.Os
.Sh NAME
@@ -76,3 +76,8 @@
.Fn floorl
functions conform to
.St -isoC-99 .
+.Sh HISTORY
+A
+.Fn floor
+function first appeared in
+.At v5 .
diff --git a/lib/msun/man/fmod.3 b/lib/msun/man/fmod.3
--- a/lib/msun/man/fmod.3
+++ b/lib/msun/man/fmod.3
@@ -28,7 +28,7 @@
.\" from: @(#)fmod.3 5.1 (Berkeley) 5/2/91
.\" $FreeBSD$
.\"
-.Dd June 19, 2008
+.Dd April 3, 2022
.Dt FMOD 3
.Os
.Sh NAME
@@ -85,3 +85,8 @@
.Fn fmodl
functions conform to
.St -isoC-99 .
+.Sh HISTORY
+An
+.Fn fmod
+function first appeared in
+.At v5 .
diff --git a/lib/msun/man/sinh.3 b/lib/msun/man/sinh.3
--- a/lib/msun/man/sinh.3
+++ b/lib/msun/man/sinh.3
@@ -28,7 +28,7 @@
.\" from: @(#)sinh.3 6.6 (Berkeley) 4/19/91
.\" $FreeBSD$
.\"
-.Dd August 17, 2013
+.Dd April 3, 2022
.Dt SINH 3
.Os
.Sh NAME
@@ -71,3 +71,8 @@
.Fn sinh
function conforms to
.St -isoC .
+.Sh HISTORY
+The
+.Fn sinh
+function first appeared in
+.At v7 .
diff --git a/lib/msun/man/tanh.3 b/lib/msun/man/tanh.3
--- a/lib/msun/man/tanh.3
+++ b/lib/msun/man/tanh.3
@@ -28,7 +28,7 @@
.\" from: @(#)tanh.3 5.1 (Berkeley) 5/2/91
.\" $FreeBSD$
.\"
-.Dd August 17, 2013
+.Dd April 3, 2022
.Dt TANH 3
.Os
.Sh NAME
@@ -80,3 +80,8 @@
.Fn tanh
function conforms to
.St -isoC .
+.Sh HISTORY
+The
+.Fn tanh
+function first appeared in
+.At v7 .

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