Add SIGWINCH to generic <bits/signum.h>.

diff --git a/ChangeLog b/ChangeLog
index 3400f7b..a0edc1b 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2015-07-23  Roland McGrath  <roland@hack.frob.com>
 
+       * bits/signum.h: Update comments to mention 1003.1-2013 too.
+       (SIGWINCH): New macro.
+
        * sysdeps/nacl/getdtsz.c (getdtablesize): Add missing weak_alias.
        * sysdeps/arm/nacl/libc.abilist: Add it.
 

diff --git a/bits/signum.h b/bits/signum.h
index a07a9b4..e6deefd 100644 (file)
--- a/bits/signum.h
+++ b/bits/signum.h
@@ -28,9 +28,13 @@
 # define SIG_HOLD ((__sighandler_t)  2)        /* Add signal to hold mask.  */
 #endif
 
-/* We define here all the signal names listed in POSIX (1003.1-2008).
+/* We define here all the signal names listed in POSIX (1003.1-2008);
+   as of 1003.1-2013, no additional signals have been added by POSIX.
+   We also define here signal names that historically exist in every
+   real-world POSIX variant (e.g. SIGWINCH).
+
    Signals in the 1-15 range are defined with their historical numbers.
-   For other signals specified by POSIX, we use the BSD numbers.  */
+   For other signals, we use the BSD numbers.  */
 
 /* ISO C99 signals.  */
 #define        SIGINT          2       /* Interactive attention signal.  */
@@ -50,7 +54,7 @@
 #define        SIGPIPE         13      /* Broken pipe.  */
 #define        SIGALRM         14      /* Alarm clock.  */
 
-/* New(er) POSIX signals (1003.1-2008).  */
+/* New(er) POSIX signals (1003.1-2008, 1003.1-2013).  */
 #define        SIGURG          16 /* High bandwidth data is available at a socket.  */
 #define        SIGSTOP         17      /* Stopped (signal).  */
 #define        SIGTSTP         18      /* Stopped.  */
@@ -67,10 +71,14 @@
 #define        SIGUSR1         30      /* User-defined signal 1.  */
 #define        SIGUSR2         31      /* User-defined signal 2.  */
 
+/* Nonstandard signals found in all modern POSIX systems
+   (including both BSD and Linux).  */
+#define        SIGWINCH        28      /* Window size change (4.3 BSD, Sun).  */
+
 #define        _NSIG           32
 
 /* Archaic names for compatibility. */
-#define        SIGIOT          SIGABRT /* IOT instruction, abort() on a PDP11 */
+#define        SIGIOT          SIGABRT /* IOT instruction, abort() on a PDP-11.  */
 #define        SIGCLD          SIGCHLD /* Old System V name */
 
 #endif /* <signal.h> included.  */