[Bug 14449] Ambiguity in SIGSYS <-> SIGUNUSED portion of signal(7)

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http://bugzilla.kernel.org/show_bug.cgi?id=14449


Michael Kerrisk <mtk.manpages@xxxxxxxxx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mtk.manpages@xxxxxxxxx




--- Comment #3 from Michael Kerrisk <mtk.manpages@xxxxxxxxx>  2010-02-03 05:55:18 ---
Thanks for this report. I applied the patch below. Satisfactory?

--- a/man7/signal.7
+++ b/man7/signal.7
@@ -270,7 +270,7 @@ SIGBUS      10,7,10 Core    Bus error (bad memory access)
 SIGPOLL                Term    Pollable event (Sys V).
                        Synonym for \fBSIGIO\fP
 SIGPROF        27,27,29        Term    Profiling timer expired
-SIGSYS 12,\-,12        Core    Bad argument to routine (SVr4)
+SIGSYS 12,31,12        Core    Bad argument to routine (SVr4)
 SIGTRAP        5       Core    Trace/breakpoint trap
 SIGURG 16,23,21        Ign     Urgent condition on socket (4.2BSD)
 SIGVTALRM      26,26,28        Term    Virtual alarm clock (4.2BSD)
@@ -304,7 +304,7 @@ SIGPWR      29,30,19        Term    Power failure (System
V)
 SIGINFO        29,\-,\-                A synonym for \fBSIGPWR\fP
 SIGLOST        \-,\-,\-        Term    File lock lost
 SIGWINCH       28,28,20        Ign     Window resize signal (4.3BSD, Sun)
-SIGUNUSED      \-,31,\-        Term    Unused signal (will be \fBSIGSYS\fP)
+SIGUNUSED      \-,31,\-        Core    Synonymous with \fBSIGSYS\fP
 .TE

 (Signal 29 is
@@ -328,6 +328,13 @@ by default on those other Unix systems where it appears.
 .B SIGIO
 (which is not specified in POSIX.1-2001) is ignored by default
 on several other Unix systems.
+
+Where defined,
+.B SIGUNUSED
+is synonymous with
+.\" parisc is the only exception: SIGSYS is 12, SIGUNUSED is 31
+.B SIGSYS
+on most architectures.
 .SS "Real-time Signals"
 Linux supports real-time signals as originally defined in the POSIX.1b
 real-time extensions (and now included in POSIX.1-2001).

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