Revert "Many pages: Remove references to C89"

This reverts commit 72b349dd8c209d7375d4d4f76e2315943d654ee9.

This removal caused inconveniences to some programmers.  We've agreed to
keep the information about C89, since there's an easy way to keep it
correct by checking against a plain-text copy of the standard itself:

    $ stdc89()
      {
          grep "[[:alpha:]] \**\b$1([[:alnum:]*,. ]*);" /path/to/c89-draft.txt;
      }
    $ stdc89 printf
         int printf(const char *format, ...);
         int printf(const char *format, ...);

We will also do a split of the information in STANDARDS, since now it's
a mix of what a proper STANDARDS section would be plus a HISTORY section
commonly-found in other manual pages.  C89 will go into HISTORY.

Link: <https://lore.kernel.org/linux-man/b73a9636-1a17-36f3-3718-d9ca3b9293ed@gmail.com/T/>
Link: <https://port70.net/~nsz/c/c89/c89-draft.txt>
Reported-by: Oskari Pirhonen <xxc3ncoredxx@gmail.com>
Reported-by: Matt Jolly <Matt.Jolly@footclan.ninja>
Cc: Brian Inglis <Brian.Inglis@Shaw.ca>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

88 files changed, 134 insertions, 89 deletions

diff --git a/man2/rename.2 b/man2/rename.2
index 08e7958f3..5007ef6b6 100644
--- a/man2/rename.2
+++ b/man2/rename.2
@@ -497,7 +497,7 @@ library support was added in glibc 2.4.
 was added in Linux 3.15; library support was added in glibc 2.28.
 .SH STANDARDS
 .BR rename ():
-4.3BSD, C99, POSIX.1-2001, POSIX.1-2008.
+4.3BSD, C89, C99, POSIX.1-2001, POSIX.1-2008.
 .PP
 .BR renameat ():
 POSIX.1-2008.
diff --git a/man2/signal.2 b/man2/signal.2
index b21abc3b8..d340c734b 100644
--- a/man2/signal.2
+++ b/man2/signal.2
@@ -94,7 +94,7 @@ is set to indicate the error.
 .I signum
 is invalid.
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .SH NOTES
 The effects of
 .BR signal ()
diff --git a/man2/time.2 b/man2/time.2
index 57558c9aa..2be79cf78 100644
--- a/man2/time.2
+++ b/man2/time.2
@@ -48,7 +48,7 @@ an invalid address may instead trigger a
 .B SIGSEGV
 signal.
 .SH STANDARDS
-SVr4, 4.3BSD, C99, POSIX.1-2001.
+SVr4, 4.3BSD, C89, C99, POSIX.1-2001.
 .\" Under 4.3BSD, this call is obsoleted by
 .\" .BR gettimeofday (2).
 POSIX does not specify any error conditions.
diff --git a/man3/abort.3 b/man3/abort.3
index ddc0ed536..b0570585d 100644
--- a/man3/abort.3
+++ b/man3/abort.3
@@ -69,7 +69,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-SVr4, POSIX.1-2001, POSIX.1-2008, 4.3BSD, C99.
+SVr4, POSIX.1-2001, POSIX.1-2008, 4.3BSD, C89, C99.
 .SH NOTES
 Up until glibc 2.26,
 if the
diff --git a/man3/abs.3 b/man3/abs.3
index 06eb12c56..a1293f385 100644
--- a/man3/abs.3
+++ b/man3/abs.3
@@ -77,6 +77,19 @@ T}	Thread safety	MT-Safe
 .sp 1
 .SH STANDARDS
 POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+.\" POSIX.1 (1996 edition) requires only the
+.\" .BR abs ()
+.\" function.
+C89 only
+includes the
+.BR abs ()
+and
+.BR labs ()
+functions; the functions
+.BR llabs ()
+and
+.BR imaxabs ()
+were added in C99.
 .SH NOTES
 Trying to take the absolute value of the most negative integer
 is not defined.
diff --git a/man3/acos.3 b/man3/acos.3
index 1628f8125..15466bb20 100644
--- a/man3/acos.3
+++ b/man3/acos.3
@@ -111,7 +111,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR asin (3),
 .BR atan (3),
diff --git a/man3/asin.3 b/man3/asin.3
index 76284ed91..e2cbfe96e 100644
--- a/man3/asin.3
+++ b/man3/asin.3
@@ -107,7 +107,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR acos (3),
 .BR atan (3),
diff --git a/man3/assert.3 b/man3/assert.3
index dfb476399..0e0418e6f 100644
--- a/man3/assert.3
+++ b/man3/assert.3
@@ -74,7 +74,14 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
+In C89,
+.I expression
+is required to be of type
+.I int
+and undefined behavior results if it is not, but in C99
+it may have any scalar type.
+.\" See Defect Report 107 for more details.
 .SH BUGS
 .BR assert ()
 is implemented as a macro; if the expression tested has side-effects,
diff --git a/man3/atan.3 b/man3/atan.3
index e163db539..f95bc073c 100644
--- a/man3/atan.3
+++ b/man3/atan.3
@@ -92,7 +92,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR acos (3),
 .BR asin (3),
diff --git a/man3/atan2.3 b/man3/atan2.3
index 186209495..e4284d343 100644
--- a/man3/atan2.3
+++ b/man3/atan2.3
@@ -164,7 +164,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR acos (3),
 .BR asin (3),
diff --git a/man3/atexit.3 b/man3/atexit.3
index 3afdcf1b0..363124cc5 100644
--- a/man3/atexit.3
+++ b/man3/atexit.3
@@ -76,7 +76,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 Functions registered using
 .BR atexit ()
diff --git a/man3/atof.3 b/man3/atof.3
index 913060cbd..22d1c50da 100644
--- a/man3/atof.3
+++ b/man3/atof.3
@@ -58,7 +58,7 @@ T}	Thread safety	MT-Safe locale
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH SEE ALSO
 .BR atoi (3),
 .BR atol (3),
diff --git a/man3/atoi.3 b/man3/atoi.3
index ca7c9fe27..10cc66eba 100644
--- a/man3/atoi.3
+++ b/man3/atoi.3
@@ -85,6 +85,12 @@ T}	Thread safety	MT-Safe locale
 .sp 1
 .SH STANDARDS
 POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+C89 and
+POSIX.1-1996 include the functions
+.BR atoi ()
+and
+.BR atol ()
+only.
 .\" .SH NOTES
 .\" Linux libc provided
 .\" .BR atoq ()
diff --git a/man3/bsearch.3 b/man3/bsearch.3
index 790b0b7d9..d27a57475 100644
--- a/man3/bsearch.3
+++ b/man3/bsearch.3
@@ -78,7 +78,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH EXAMPLES
 The example below first sorts an array of structures using
 .BR qsort (3),
diff --git a/man3/ceil.3 b/man3/ceil.3
index acad6fc58..3957c514d 100644
--- a/man3/ceil.3
+++ b/man3/ceil.3
@@ -79,7 +79,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH NOTES
 SUSv2 and POSIX.1-2001 contain text about overflow (which might set
 .I errno
diff --git a/man3/clock.3 b/man3/clock.3
index 488b94e5b..49d92238c 100644
--- a/man3/clock.3
+++ b/man3/clock.3
@@ -49,7 +49,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 XSI requires that
 .B CLOCKS_PER_SEC
 equals 1000000 independent
diff --git a/man3/ctime.3 b/man3/ctime.3
index b94e66bd6..31f3e66db 100644
--- a/man3/ctime.3
+++ b/man3/ctime.3
@@ -302,7 +302,7 @@ T}
 .sp 1
 .SH STANDARDS
 POSIX.1-2001.
-C99 specifies
+C89 and C99 specify
 .BR asctime (),
 .BR ctime (),
 .BR gmtime (),
diff --git a/man3/difftime.3 b/man3/difftime.3
index b85254cd0..051800888 100644
--- a/man3/difftime.3
+++ b/man3/difftime.3
@@ -47,7 +47,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 On a POSIX system,
 .I time_t
diff --git a/man3/div.3 b/man3/div.3
index 375435dd9..29b9493a2 100644
--- a/man3/div.3
+++ b/man3/div.3
@@ -85,7 +85,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 The functions
 .BR lldiv ()
 and
diff --git a/man3/exit.3 b/man3/exit.3
index 885335846..d94ac6eb7 100644
--- a/man3/exit.3
+++ b/man3/exit.3
@@ -94,7 +94,7 @@ The
 function uses a global variable that is not protected,
 so it is not thread-safe.
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 The behavior is undefined if one of the functions registered using
 .BR atexit (3)
diff --git a/man3/exp.3 b/man3/exp.3
index 3bd2874de..d8d49da5e 100644
--- a/man3/exp.3
+++ b/man3/exp.3
@@ -124,7 +124,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR cbrt (3),
 .BR cexp (3),
diff --git a/man3/fabs.3 b/man3/fabs.3
index a3febcfbb..ccb41d0a6 100644
--- a/man3/fabs.3
+++ b/man3/fabs.3
@@ -83,7 +83,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR abs (3),
 .BR cabs (3),
diff --git a/man3/fclose.3 b/man3/fclose.3
index 2c55efa69..213e36bb7 100644
--- a/man3/fclose.3
+++ b/man3/fclose.3
@@ -83,7 +83,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .SH NOTES
 Note that
 .BR fclose ()
diff --git a/man3/ferror.3 b/man3/ferror.3
index cf9ed1645..9d9ebe23a 100644
--- a/man3/ferror.3
+++ b/man3/ferror.3
@@ -93,7 +93,7 @@ The functions
 .BR feof (),
 and
 .BR ferror ()
-conform to C99, POSIX.1-2001, and POSIX.1-2008.
+conform to C89, C99, POSIX.1-2001, and POSIX.1-2008.
 .SH NOTES
 POSIX.1-2008 specifies
 .\"https://www.austingroupbugs.net/view.php?id=401
diff --git a/man3/fflush.3 b/man3/fflush.3
index 2830824ab..927ff8b2b 100644
--- a/man3/fflush.3
+++ b/man3/fflush.3
@@ -91,7 +91,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-C99, POSIX.1-2001, POSIX.1-2008.
+C89, C99, POSIX.1-2001, POSIX.1-2008.
 .PP
 POSIX.1-2001 did not specify the behavior for flushing of input streams,
 but the behavior is specified in POSIX.1-2008.
diff --git a/man3/fgetc.3 b/man3/fgetc.3
index 0c124a280..75bb9231b 100644
--- a/man3/fgetc.3
+++ b/man3/fgetc.3
@@ -126,7 +126,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .PP
 It is not advisable to mix calls to input functions from the
 .I stdio
diff --git a/man3/floor.3 b/man3/floor.3
index c0fdc3b82..1be5bc094 100644
--- a/man3/floor.3
+++ b/man3/floor.3
@@ -78,7 +78,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH NOTES
 SUSv2 and POSIX.1-2001 contain text about overflow (which might set
 .I errno
diff --git a/man3/fmod.3 b/man3/fmod.3
index 2f40ded1e..5c9c2be38 100644
--- a/man3/fmod.3
+++ b/man3/fmod.3
@@ -142,7 +142,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH BUGS
 Before glibc 2.10, the glibc implementation did not set
 .\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=6784
diff --git a/man3/fopen.3 b/man3/fopen.3
index 910762b23..2cdaa387c 100644
--- a/man3/fopen.3
+++ b/man3/fopen.3
@@ -291,7 +291,7 @@ T}	Thread safety	MT-Safe
 .SH STANDARDS
 .BR fopen (),
 .BR freopen ():
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .PP
 .BR fdopen ():
 POSIX.1-2001, POSIX.1-2008.
diff --git a/man3/fread.3 b/man3/fread.3
index de609dc24..160ea5f44 100644
--- a/man3/fread.3
+++ b/man3/fread.3
@@ -98,7 +98,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89.
 .SH EXAMPLES
 The program below demonstrates the use of
 .BR fread ()
diff --git a/man3/frexp.3 b/man3/frexp.3
index 862d8f3e7..8a3692710 100644
--- a/man3/frexp.3
+++ b/man3/frexp.3
@@ -102,7 +102,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH EXAMPLES
 The program below produces results such as the following:
 .PP
diff --git a/man3/fseek.3 b/man3/fseek.3
index dc98280e2..7c211a8de 100644
--- a/man3/fseek.3
+++ b/man3/fseek.3
@@ -172,7 +172,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .SH SEE ALSO
 .BR lseek (2),
 .BR fseeko (3)
diff --git a/man3/getenv.3 b/man3/getenv.3
index b9f9ed2c2..51918a955 100644
--- a/man3/getenv.3
+++ b/man3/getenv.3
@@ -98,7 +98,7 @@ T}	Thread safety	MT-Safe env
 .sp 1
 .SH STANDARDS
 .BR getenv ():
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .PP
 .BR secure_getenv ()
 is a GNU extension.
diff --git a/man3/gets.3 b/man3/gets.3
index b77dad5c4..5c3e7b4b2 100644
--- a/man3/gets.3
+++ b/man3/gets.3
@@ -57,7 +57,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-C99, POSIX.1-2001.
+C89, C99, POSIX.1-2001.
 .PP
 LSB deprecates
 .BR gets ().
diff --git a/man3/isalpha.3 b/man3/isalpha.3
index 668369bcf..baf2cd27b 100644
--- a/man3/isalpha.3
+++ b/man3/isalpha.3
@@ -244,10 +244,9 @@ T}	Thread safety	MT-Safe
 .sp 1
 .\" FIXME: need a thread-safety statement about the *_l functions
 .SH STANDARDS
-POSIX.1-2001 specifies
+C89 specifies
 .BR isalnum (),
 .BR isalpha (),
-.BR isblank (),
 .BR iscntrl (),
 .BR isdigit (),
 .BR isgraph (),
@@ -258,9 +257,16 @@ POSIX.1-2001 specifies
 .BR isupper (),
 and
 .BR isxdigit (),
-and also
+but not
+.BR isascii ()
+and
+.BR isblank ().
+POSIX.1-2001
+also specifies those functions, and also
 .BR isascii ()
-(as an XSI extension).
+(as an XSI extension)
+and
+.BR isblank ().
 C99 specifies all of the preceding functions, except
 .BR isascii ().
 .PP
diff --git a/man3/ldexp.3 b/man3/ldexp.3
index fc944b729..e28456c1f 100644
--- a/man3/ldexp.3
+++ b/man3/ldexp.3
@@ -125,7 +125,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR frexp (3),
 .BR modf (3),
diff --git a/man3/localeconv.3 b/man3/localeconv.3
index 5a5ff2430..f900fc119 100644
--- a/man3/localeconv.3
+++ b/man3/localeconv.3
@@ -66,7 +66,7 @@ T}
 .ad
 .sp 1
 .SH STANDARDS
-C99.
+C89, C99.
 .SH BUGS
 The
 .BR printf (3)
diff --git a/man3/log.3 b/man3/log.3
index 13bac2438..bde58d9f7 100644
--- a/man3/log.3
+++ b/man3/log.3
@@ -124,7 +124,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH BUGS
 In glibc 2.5 and earlier,
 taking the
diff --git a/man3/log10.3 b/man3/log10.3
index d64e49c85..00013ca76 100644
--- a/man3/log10.3
+++ b/man3/log10.3
@@ -85,7 +85,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR cbrt (3),
 .BR clog10 (3),
diff --git a/man3/malloc.3 b/man3/malloc.3
index 21f537dd5..6b7d7e4ea 100644
--- a/man3/malloc.3
+++ b/man3/malloc.3
@@ -264,7 +264,7 @@ T}	Thread safety	MT-Safe
 .BR free (),
 .BR calloc (),
 .BR realloc ():
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .PP
 .BR reallocarray ()
 is a nonstandard extension that first appeared in OpenBSD 5.6 and FreeBSD 11.0.
diff --git a/man3/memchr.3 b/man3/memchr.3
index e03001bec..08c93ee82 100644
--- a/man3/memchr.3
+++ b/man3/memchr.3
@@ -121,7 +121,7 @@ T}	Thread safety	MT-Safe
 .sp 1
 .SH STANDARDS
 .BR memchr ():
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .PP
 The
 .BR memrchr ()
diff --git a/man3/memcmp.3 b/man3/memcmp.3
index de712bd0a..e58719848 100644
--- a/man3/memcmp.3
+++ b/man3/memcmp.3
@@ -63,7 +63,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 Do not use
 .BR memcmp ()
diff --git a/man3/memcpy.3 b/man3/memcpy.3
index 5af704e71..77169a27e 100644
--- a/man3/memcpy.3
+++ b/man3/memcpy.3
@@ -53,7 +53,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 Failure to observe the requirement that the memory areas
 do not overlap has been the source of significant bugs.
diff --git a/man3/memmove.3 b/man3/memmove.3
index b8c1c8751..8ee7150e2 100644
--- a/man3/memmove.3
+++ b/man3/memmove.3
@@ -61,7 +61,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH SEE ALSO
 .BR bcopy (3),
 .BR bstring (3),
diff --git a/man3/memset.3 b/man3/memset.3
index 07862c431..cce27bb95 100644
--- a/man3/memset.3
+++ b/man3/memset.3
@@ -53,7 +53,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH SEE ALSO
 .BR bstring (3),
 .BR bzero (3),
diff --git a/man3/modf.3 b/man3/modf.3
index 42dfbdd88..5662b5a06 100644
--- a/man3/modf.3
+++ b/man3/modf.3
@@ -89,7 +89,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR frexp (3),
 .BR ldexp (3)
diff --git a/man3/offsetof.3 b/man3/offsetof.3
index 423e291ee..7cfba984d 100644
--- a/man3/offsetof.3
+++ b/man3/offsetof.3
@@ -64,7 +64,7 @@ within the given
 .IR type ,
 in units of bytes.
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .SH EXAMPLES
 On a Linux/i386 system, when compiled using the default
 .BR gcc (1)
diff --git a/man3/perror.3 b/man3/perror.3
index a581c3340..09939d764 100644
--- a/man3/perror.3
+++ b/man3/perror.3
@@ -126,7 +126,7 @@ T}	Thread safety	MT-Safe race:stderr
 .SH STANDARDS
 .BR perror (),
 .IR errno :
-POSIX.1-2001, POSIX.1-2008, C99, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, 4.3BSD.
 .PP
 The externals
 .I sys_nerr
diff --git a/man3/pow.3 b/man3/pow.3
index 264adb107..b9a66c929 100644
--- a/man3/pow.3
+++ b/man3/pow.3
@@ -331,7 +331,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH BUGS
 .SS Historical bugs (now fixed)
 Before glibc 2.28,
diff --git a/man3/printf.3 b/man3/printf.3
index ac510e59e..322281e51 100644
--- a/man3/printf.3
+++ b/man3/printf.3
@@ -963,10 +963,12 @@ T}	Thread safety	MT-Safe locale
 .BR fprintf (),
 .BR printf (),
 .BR sprintf (),
-.BR snprintf (),
 .BR vprintf (),
 .BR vfprintf (),
-.BR vsprintf (),
+.BR vsprintf ():
+POSIX.1-2001, POSIX.1-2008, C89, C99.
+.PP
+.BR snprintf (),
 .BR vsnprintf ():
 POSIX.1-2001, POSIX.1-2008, C99.
 .PP
diff --git a/man3/puts.3 b/man3/puts.3
index 343bed8ae..10a7f0cb7 100644
--- a/man3/puts.3
+++ b/man3/puts.3
@@ -103,7 +103,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .SH BUGS
 It is not advisable to mix calls to output functions from the
 .I stdio
diff --git a/man3/qsort.3 b/man3/qsort.3
index 55f7b18b6..f4cf5a321 100644
--- a/man3/qsort.3
+++ b/man3/qsort.3
@@ -104,7 +104,7 @@ T}	Thread safety	MT-Safe
 .sp 1
 .SH STANDARDS
 .BR qsort ():
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 To compare C strings, the comparison function can call
 .BR strcmp (3),
diff --git a/man3/raise.3 b/man3/raise.3
index 4d1a721ae..82903c118 100644
--- a/man3/raise.3
+++ b/man3/raise.3
@@ -63,7 +63,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .SH NOTES
 Since glibc 2.3.3,
 .BR raise ()
diff --git a/man3/rand.3 b/man3/rand.3
index f188bdd33..2692bc235 100644
--- a/man3/rand.3
+++ b/man3/rand.3
@@ -138,7 +138,7 @@ The functions
 .BR rand ()
 and
 .BR srand ()
-conform to SVr4, 4.3BSD, C99, POSIX.1-2001.
+conform to SVr4, 4.3BSD, C89, C99, POSIX.1-2001.
 The function
 .BR rand_r ()
 is from POSIX.1-2001.
diff --git a/man3/remove.3 b/man3/remove.3
index e68c6c5fb..a679b8adb 100644
--- a/man3/remove.3
+++ b/man3/remove.3
@@ -71,7 +71,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, 4.3BSD.
 .\" .SH NOTES
 .\" Under libc4 and libc5,
 .\" .BR remove ()
diff --git a/man3/setbuf.3 b/man3/setbuf.3
index 4e6bb7362..b4ba7d8f1 100644
--- a/man3/setbuf.3
+++ b/man3/setbuf.3
@@ -164,7 +164,7 @@ The
 .BR setbuf ()
 and
 .BR setvbuf ()
-functions conform to C99.
+functions conform to C89 and C99.
 .SH NOTES
 POSIX notes
 .\" https://www.austingroupbugs.net/view.php?id=397#c799
diff --git a/man3/setjmp.3 b/man3/setjmp.3
index c66a42503..a8516590a 100644
--- a/man3/setjmp.3
+++ b/man3/setjmp.3
@@ -143,7 +143,7 @@ T}	Thread safety	MT-Safe
 .SH STANDARDS
 .BR setjmp (),
 .BR longjmp ():
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .PP
 .BR sigsetjmp (),
 .BR siglongjmp ():
diff --git a/man3/setlocale.3 b/man3/setlocale.3
index 314dfa0f4..1604ad883 100644
--- a/man3/setlocale.3
+++ b/man3/setlocale.3
@@ -199,7 +199,7 @@ T}	Thread safety	MT-Unsafe const:locale env
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .PP
 The C standards specify only the categories
 .BR LC_ALL ,
diff --git a/man3/sin.3 b/man3/sin.3
index a5f9262a6..ccfddf87a 100644
--- a/man3/sin.3
+++ b/man3/sin.3
@@ -104,7 +104,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH BUGS
 Before glibc 2.10, the glibc implementation did not set
 .\" http://sources.redhat.com/bugzilla/show_bug.cgi?id=6781
diff --git a/man3/sinh.3 b/man3/sinh.3
index 9a1821aa9..80eb79a6e 100644
--- a/man3/sinh.3
+++ b/man3/sinh.3
@@ -120,7 +120,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR acosh (3),
 .BR asinh (3),
diff --git a/man3/sqrt.3 b/man3/sqrt.3
index 10c47082c..7fb9a58db 100644
--- a/man3/sqrt.3
+++ b/man3/sqrt.3
@@ -103,7 +103,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR cbrt (3),
 .BR csqrt (3),
diff --git a/man3/stdarg.3 b/man3/stdarg.3
index 468a0904a..3a6601913 100644
--- a/man3/stdarg.3
+++ b/man3/stdarg.3
@@ -224,7 +224,15 @@ T}	Thread safety	MT-Safe race:ap
 .ad
 .sp 1
 .SH STANDARDS
-C99.
+The
+.BR va_start (),
+.BR va_arg (),
+and
+.BR va_end ()
+macros conform to C89.
+C99 defines the
+.BR va_copy ()
+macro.
 .SH BUGS
 Unlike the historical
 .B varargs
diff --git a/man3/stdin.3 b/man3/stdin.3
index d1b2375f4..caa65a40f 100644
--- a/man3/stdin.3
+++ b/man3/stdin.3
@@ -119,7 +119,7 @@ The
 .IR stdout ,
 and
 .I stderr
-macros conform to C99
+macros conform to C89
 and this standard also stipulates that these three
 streams shall be open at program startup.
 .SH NOTES
diff --git a/man3/stdio.3 b/man3/stdio.3
index 2b6c43e01..628f9b690 100644
--- a/man3/stdio.3
+++ b/man3/stdio.3
@@ -335,7 +335,7 @@ T}
 .SH STANDARDS
 The
 .I stdio
-library conforms to C99.
+library conforms to C89.
 .SH SEE ALSO
 .BR close (2),
 .BR open (2),
diff --git a/man3/stpncpy.3 b/man3/stpncpy.3
index 9d752efe2..70e80195c 100644
--- a/man3/stpncpy.3
+++ b/man3/stpncpy.3
@@ -101,7 +101,7 @@ POSIX.1-2008.
 .\" It first appeared in glibc 1.07 in 1993.
 .TP
 .BR strncpy ()
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH CAVEATS
 The name of these functions is confusing.
 These functions produce a null-padded character sequence,
diff --git a/man3/strchr.3 b/man3/strchr.3
index 3eac67008..6cce98001 100644
--- a/man3/strchr.3
+++ b/man3/strchr.3
@@ -107,7 +107,7 @@ T}	Thread safety	MT-Safe
 .SH STANDARDS
 .BR strchr (),
 .BR strrchr ():
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .PP
 .BR strchrnul ()
 is a GNU extension.
diff --git a/man3/strcmp.3 b/man3/strcmp.3
index 8a2ee35f9..63de49e18 100644
--- a/man3/strcmp.3
+++ b/man3/strcmp.3
@@ -95,7 +95,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 POSIX.1 specifies only that:
 .RS
diff --git a/man3/strcoll.3 b/man3/strcoll.3
index e43468bb5..6ebbadcb0 100644
--- a/man3/strcoll.3
+++ b/man3/strcoll.3
@@ -68,7 +68,7 @@ T}	Thread safety	MT-Safe locale
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH NOTES
 In the
 .I "POSIX"
diff --git a/man3/strcpy.3 b/man3/strcpy.3
index 7d04f59f5..02b6fbd8c 100644
--- a/man3/strcpy.3
+++ b/man3/strcpy.3
@@ -123,7 +123,7 @@ POSIX.1-2008.
 .BR strcpy ()
 .TQ
 .BR strcat ()
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH CAVEATS
 The strings
 .I src
diff --git a/man3/strerror.3 b/man3/strerror.3
index 96bd8df11..da517f5df 100644
--- a/man3/strerror.3
+++ b/man3/strerror.3
@@ -255,7 +255,7 @@ T}	Thread safety	MT-Safe
 .sp 1
 .SH STANDARDS
 .BR strerror ()
-is specified by POSIX.1-2001, POSIX.1-2008, and C99.
+is specified by POSIX.1-2001, POSIX.1-2008, C89, and C99.
 .BR strerror_r ()
 is specified by POSIX.1-2001 and POSIX.1-2008.
 .\" FIXME . for later review when Issue 8 is one day released...
diff --git a/man3/strftime.3 b/man3/strftime.3
index 57b2a38aa..b820abf70 100644
--- a/man3/strftime.3
+++ b/man3/strftime.3
@@ -542,7 +542,7 @@ T}	Thread safety	MT-Safe env locale
 .sp 1
 .SH STANDARDS
 .BR strftime ():
-SVr4, C99.
+SVr4, C89, C99.
 .PD 0
 .PP
 .PD
diff --git a/man3/strlen.3 b/man3/strlen.3
index f994a2e90..f8c9bc0c6 100644
--- a/man3/strlen.3
+++ b/man3/strlen.3
@@ -49,7 +49,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, C11, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, C11, SVr4, 4.3BSD.
 .SH NOTES
 In cases where the input buffer may not contain
 a terminating null byte,
diff --git a/man3/strncat.3 b/man3/strncat.3
index cbf930ec3..af5027c09 100644
--- a/man3/strncat.3
+++ b/man3/strncat.3
@@ -66,7 +66,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH CAVEATS
 The name of this function is confusing.
 This function has no relation to
diff --git a/man3/strpbrk.3 b/man3/strpbrk.3
index cb84aeca4..f81a263af 100644
--- a/man3/strpbrk.3
+++ b/man3/strpbrk.3
@@ -55,7 +55,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH SEE ALSO
 .BR memchr (3),
 .BR strchr (3),
diff --git a/man3/strsep.3 b/man3/strsep.3
index 794ddbec5..103d9b788 100644
--- a/man3/strsep.3
+++ b/man3/strsep.3
@@ -92,7 +92,7 @@ function was introduced as a replacement for
 since the latter cannot handle empty fields.
 However,
 .BR strtok (3)
-conforms to C99 and hence is more portable.
+conforms to C89/C99 and hence is more portable.
 .SH BUGS
 Be cautious when using this function.
 If you do use it, note that:
diff --git a/man3/strspn.3 b/man3/strspn.3
index 34d2f1a6a..fbb0b4043 100644
--- a/man3/strspn.3
+++ b/man3/strspn.3
@@ -73,7 +73,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH SEE ALSO
 .BR memchr (3),
 .BR strchr (3),
diff --git a/man3/strstr.3 b/man3/strstr.3
index 25bbf9b27..2f41cd162 100644
--- a/man3/strstr.3
+++ b/man3/strstr.3
@@ -74,7 +74,7 @@ T}	Thread safety	MT-Safe locale
 .sp 1
 .SH STANDARDS
 .BR strstr ():
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .PP
 The
 .BR strcasestr ()
diff --git a/man3/strtod.3 b/man3/strtod.3
index 2064b395c..eb1dd650c 100644
--- a/man3/strtod.3
+++ b/man3/strtod.3
@@ -158,6 +158,9 @@ T}	Thread safety	MT-Safe locale
 .sp 1
 .SH STANDARDS
 POSIX.1-2001, POSIX.1-2008, C99.
+.PP
+.BR strtod ()
+was also described in C89.
 .SH NOTES
 Since
 0 can legitimately be returned
diff --git a/man3/strtok.3 b/man3/strtok.3
index 9c80c2823..db52fb25c 100644
--- a/man3/strtok.3
+++ b/man3/strtok.3
@@ -174,7 +174,7 @@ T}	Thread safety	MT-Safe
 .SH STANDARDS
 .TP
 .BR strtok ()
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .TP
 .BR strtok_r ()
 POSIX.1-2001, POSIX.1-2008.
diff --git a/man3/strtol.3 b/man3/strtol.3
index da6c98441..34eb63414 100644
--- a/man3/strtol.3
+++ b/man3/strtol.3
@@ -161,7 +161,7 @@ T}	Thread safety	MT-Safe locale
 .sp 1
 .SH STANDARDS
 .BR strtol ():
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99 SVr4, 4.3BSD.
 .PP
 .BR strtoll ():
 POSIX.1-2001, POSIX.1-2008, C99.
diff --git a/man3/strtoul.3 b/man3/strtoul.3
index 784094ad6..b43a0b1dd 100644
--- a/man3/strtoul.3
+++ b/man3/strtoul.3
@@ -161,7 +161,7 @@ T}	Thread safety	MT-Safe locale
 .sp 1
 .SH STANDARDS
 .BR strtoul ():
-POSIX.1-2001, POSIX.1-2008, C99, SVr4.
+POSIX.1-2001, POSIX.1-2008, C89, C99 SVr4.
 .PP
 .BR strtoull ():
 POSIX.1-2001, POSIX.1-2008, C99.
diff --git a/man3/strxfrm.3 b/man3/strxfrm.3
index 1596273f0..59f96fd94 100644
--- a/man3/strxfrm.3
+++ b/man3/strxfrm.3
@@ -77,7 +77,7 @@ T}	Thread safety	MT-Safe locale
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.
 .SH SEE ALSO
 .BR memcmp (3),
 .BR setlocale (3),
diff --git a/man3/system.3 b/man3/system.3
index 414968fd7..a66ddfa37 100644
--- a/man3/system.3
+++ b/man3/system.3
@@ -119,7 +119,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99.
+POSIX.1-2001, POSIX.1-2008, C89, C99.
 .SH NOTES
 .BR system ()
 provides simplicity and convenience:
diff --git a/man3/tan.3 b/man3/tan.3
index 83b244c68..ff8de2308 100644
--- a/man3/tan.3
+++ b/man3/tan.3
@@ -129,7 +129,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH BUGS
 Before glibc 2.10, the glibc implementation did not set
 .\" http://sourceware.org/bugzilla/show_bug.cgi?id=6782
diff --git a/man3/tanh.3 b/man3/tanh.3
index 36b88f737..6846196bc 100644
--- a/man3/tanh.3
+++ b/man3/tanh.3
@@ -96,7 +96,7 @@ C99, POSIX.1-2001, POSIX.1-2008.
 The variant returning
 .I double
 also conforms to
-SVr4, 4.3BSD.
+SVr4, 4.3BSD, C89.
 .SH SEE ALSO
 .BR acosh (3),
 .BR asinh (3),
diff --git a/man3/tmpfile.3 b/man3/tmpfile.3
index f238ec7e3..fd39b6e1d 100644
--- a/man3/tmpfile.3
+++ b/man3/tmpfile.3
@@ -78,7 +78,7 @@ T}	Thread safety	MT-Safe
 .ad
 .sp 1
 .SH STANDARDS
-POSIX.1-2001, POSIX.1-2008, C99, SVr4, 4.3BSD, SUSv2.
+POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD, SUSv2.
 .SH NOTES
 POSIX.1-2001 specifies:
 an error message may be written to
diff --git a/man3/tmpnam.3 b/man3/tmpnam.3
index 9de98d304..8f9a2af5b 100644
--- a/man3/tmpnam.3
+++ b/man3/tmpnam.3
@@ -107,7 +107,7 @@ T}	Thread safety	MT-Safe
 .sp 1
 .SH STANDARDS
 .BR tmpnam ():
-SVr4, 4.3BSD, C99, POSIX.1-2001.
+SVr4, 4.3BSD, C89, C99, POSIX.1-2001.
 POSIX.1-2008 marks
 .BR tmpnam ()
 as obsolete.
diff --git a/man3/toupper.3 b/man3/toupper.3
index c2c98ea30..0df8209d9 100644
--- a/man3/toupper.3
+++ b/man3/toupper.3
@@ -114,7 +114,7 @@ T}	Thread safety	MT-Safe
 .SH STANDARDS
 .BR toupper (),
 .BR tolower ():
-C99, 4.3BSD, POSIX.1-2001, POSIX.1-2008.
+C89, C99, 4.3BSD, POSIX.1-2001, POSIX.1-2008.
 .PP
 .BR toupper_l (),
 .BR tolower_l ():