system_data_types.7: Document regoff_t

Signed-off-by: Alejandro Colomar <colomar.6.4.3@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man7/system_data_types.7 b/man7/system_data_types.7
index 7fba9c1be591a983107c9f9d4000598d1982cc60..38b15af2fffb23bfabb7bf6750a588b83bdfc2ca 100644 (file)
--- a/man7/system_data_types.7
+++ b/man7/system_data_types.7
@@ -77,12 +77,40 @@ capable of storing values in the range
 Conforming to: C99 and later; POSIX.1-2001 and later.
 .IP
 See also the
-.\".I regoff_t ,       FIXME: uncomment when regoff_t is documented.
 .I size_t
 and
 .I ssize_t
 types in this page.
 .TP
+.I regoff_t
+.IP
+Include:
+.I <regex.h>.
+.IP
+According to POSIX, it shall be a signed integer type
+capable of storing the largest value that can be stored in either a
+.I ptrdiff_t
+type or a
+.I ssize_t
+type.
+.IP
+Conforming to: POSIX.1-2001 and later.
+.IP
+Notes: Prior to POSIX.1-2008, the type was capable of storing
+the largest value that can be stored in either an
+.I off_t
+type or a
+.I ssize_t
+type.
+.IP
+See also the
+.\".I regmatch_t       FIXME
+.\"structure and the
+.I ptrdiff_t
+and
+.I ssize_t
+types in this page.
+.TP
 .I sigval
 .IP
 Include: