[PATCH] Cygwin: Add new APIs tc[gs]etwinsize()

[Takashi Yano]

New APIs tcgetwinsize/tcsetwinsize are added, which is added in
POSIX.1-2024.

Reviewed-by:
Signed-off-by: Takashi Yano <takashi.yano@nifty.ne.jp>
---
 winsup/cygwin/cygwin.din            |  2 ++
 winsup/cygwin/fhandler/base.cc      |  2 ++
 winsup/cygwin/include/sys/termios.h |  2 ++
 winsup/cygwin/termios.cc            | 12 ++++++++++++
 winsup/doc/new-features.xml         | 12 ++++++++++++
 winsup/doc/posix.xml                |  2 ++
 6 files changed, 32 insertions(+)

diff --git a/winsup/cygwin/cygwin.din b/winsup/cygwin/cygwin.din
index efc750e83..95a21378b 100644
--- a/winsup/cygwin/cygwin.din
+++ b/winsup/cygwin/cygwin.din
@@ -1530,9 +1530,11 @@ tcflush SIGFE
 tcgetattr SIGFE
 tcgetpgrp SIGFE
 tcgetsid SIGFE
+tcgetwinsize SIGFE
 tcsendbreak SIGFE
 tcsetattr SIGFE
 tcsetpgrp SIGFE
+tcsetwinsize SIGFE
 tdelete SIGFE
 tdestroy NOSIGFE
 telldir SIGFE
diff --git a/winsup/cygwin/fhandler/base.cc b/winsup/cygwin/fhandler/base.cc
index e5e9f2325..0902bf0c2 100644
--- a/winsup/cygwin/fhandler/base.cc
+++ b/winsup/cygwin/fhandler/base.cc
@@ -1333,6 +1333,8 @@ fhandler_base::ioctl (unsigned int cmd, void *buf)
       break;
     case FIONREAD:
     case TIOCSCTTY:
+    case TIOCGWINSZ:
+    case TIOCSWINSZ:
       set_errno (ENOTTY);
       res = -1;
       break;
diff --git a/winsup/cygwin/include/sys/termios.h b/winsup/cygwin/include/sys/termios.h
index d701e2f72..687fb92af 100644
--- a/winsup/cygwin/include/sys/termios.h
+++ b/winsup/cygwin/include/sys/termios.h
@@ -301,6 +301,8 @@ speed_t cfgetospeed(const struct termios *);
 int cfsetispeed (struct termios *, speed_t);
 int cfsetospeed (struct termios *, speed_t);
 int cfsetspeed (struct termios *, speed_t);
+int tcgetwinsize(int fd, const struct winsize *winsz);
+int tcsetwinsize(int fd, const struct winsize *winsz);
 
 #ifdef __cplusplus
 }
diff --git a/winsup/cygwin/termios.cc b/winsup/cygwin/termios.cc
index 1dfd57079..6adf47497 100644
--- a/winsup/cygwin/termios.cc
+++ b/winsup/cygwin/termios.cc
@@ -398,3 +398,15 @@ cfmakeraw(struct termios *tp)
   tp->c_cflag &= ~(CSIZE | PARENB);
   tp->c_cflag |= CS8;
 }
+
+extern "C" int
+tcgetwinsize (int fd, const struct winsize *winsz)
+{
+  return ioctl (fd, TIOCGWINSZ, winsz);
+}
+
+extern "C" int
+tcsetwinsize (int fd, const struct winsize *winsz)
+{
+  return ioctl (fd, TIOCSWINSZ, winsz);
+}
diff --git a/winsup/doc/new-features.xml b/winsup/doc/new-features.xml
index 17c688f89..b3daabd50 100644
--- a/winsup/doc/new-features.xml
+++ b/winsup/doc/new-features.xml
@@ -4,6 +4,18 @@
 
 <sect1 id="ov-new"><title>What's new and what changed in Cygwin</title>
 
+<sect2 id="ov-new3.6"><title>What's new and what changed in 3.6</title>
+
+<itemizedlist mark="bullet">
+
+<listitem><para>
+New API calls: tcgetwinsize, tcsetwinsize.
+</para></listitem>
+
+</itemizedlist>
+
+</sect2>
+
 <sect2 id="ov-new3.5"><title>What's new and what changed in 3.5</title>
 
 <itemizedlist mark="bullet">
diff --git a/winsup/doc/posix.xml b/winsup/doc/posix.xml
index eb5835c50..26d4fcfa4 100644
--- a/winsup/doc/posix.xml
+++ b/winsup/doc/posix.xml
@@ -990,9 +990,11 @@ also IEEE Std 1003.1-2017 (POSIX.1-2017).</para>
     tcgetattr
     tcgetpgrp
     tcgetsid
+    tcgetwinsize
     tcsendbreak
     tcsetattr
     tcsetpgrp
+    tcsetwinsize
     tdelete
     telldir
     tempnam
-- 
2.45.1