X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pod%2Fperlvar.pod;h=571953fcbc54eb9e27e2dc9ada5ea70c9ef01363;hb=cccede5366275457276b68bb148b7872098aaf29;hp=d90df1456c33a1298fdbf53a18db54bc60e0fc7f;hpb=4d76a3443f3312704ec3416fd425698e92a208cd;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/pod/perlvar.pod b/pod/perlvar.pod
index d90df14..571953f 100644
--- a/pod/perlvar.pod
+++ b/pod/perlvar.pod
@@ -773,7 +773,7 @@ Note for Linux users: on Linux, the C functions C<getpid()> and
 C<getppid()> return different values from different threads. In order to
 be portable, this behavior is not reflected by C<$$>, whose value remains
 consistent across threads. If you want to call the underlying C<getpid()>,
-consider using C<Inline::C> or another way to call a C library function.
+you may use the CPAN module C<Linux::Pid>.
 
 =item $REAL_USER_ID
 
@@ -869,6 +869,10 @@ from the ps(1) output.  For example, setting C<$0> to C<"foobar"> will
 result in C<"perl: foobar (perl)">.  This is an operating system
 feature.
 
+In multithreaded scripts Perl coordinates the threads so that any
+thread may modify its copy of the C<$0> and the change becomes visible
+to ps(1) (assuming the operating system plays along).
+
 =item $[
 
 The index of the first element in an array, and of the first character
@@ -1087,9 +1091,15 @@ regular expression assertion (see L<perlre>).  May be written to.
 
 =item $^S
 
-Current state of the interpreter.  Undefined if parsing of the current
-module/eval is not finished (may happen in $SIG{__DIE__} and
-$SIG{__WARN__} handlers).  True if inside an eval(), otherwise false.
+Current state of the interpreter.
+
+    $^S         State
+    ---------   -------------------
+    undef       Parsing module/eval
+    true (1)    Executing an eval
+    false (0)   Otherwise
+
+The first state may happen in $SIG{__DIE__} and $SIG{__WARN__} handlers.
 
 =item $BASETIME
 
@@ -1101,8 +1111,16 @@ and B<-C> filetests are based on this value.
 
 =item ${^TAINT}
 
-Reflects if taint mode is on or off (i.e. if the program was run with
-B<-T> or not).  True for on, false for off.
+Reflects if taint mode is on or off.  1 for on (the program was run with
+B<-T>), 0 for off, -1 when only taint warnings are enabled (i.e. with
+B<-t> or B<-TU>).  This variable is read-only.
+
+=item ${^UNICODE}
+
+Reflects certain Unicode settings of Perl.  See L<perlrun>
+documentation for the C<-C> switch for more information about
+the possible values. This variable is set during Perl startup
+and is thereafter read-only.
 
 =item $PERL_VERSION
 
@@ -1143,21 +1161,6 @@ related to the B<-w> switch.)  See also L<warnings>.
 The current set of warning checks enabled by the C<use warnings> pragma.
 See the documentation of C<warnings> for more details.
 
-=item ${^WIDE_SYSTEM_CALLS}
-
-Global flag that enables system calls made by Perl to use wide character
-APIs native to the system, if available.  This is currently only implemented
-on the Windows platform.
-
-This can also be enabled from the command line using the C<-C> switch.
-
-The initial value is typically C<0> for compatibility with Perl versions
-earlier than 5.6, but may be automatically set to C<1> by Perl if the system
-provides a user-settable default (e.g., C<$ENV{LC_CTYPE}>).
-
-The C<bytes> pragma always overrides the effect of this flag in the current
-lexical scope.  See L<bytes>.
-
 =item $EXECUTABLE_NAME
 
 =item $^X
@@ -1341,6 +1344,10 @@ this:
 
 See L<POSIX>.
 
+The delivery policy of signals changed in Perl 5.8.0 from immediate
+(also known as "unsafe") to deferred, also known as "safe signals".
+See L<perlipc> for more information.
+
 Certain internal hooks can be also set using the %SIG hash.  The
 routine indicated by C<$SIG{__WARN__}> is called when a warning message is
 about to be printed.  The warning message is passed as the first
@@ -1480,7 +1487,7 @@ exempt in these ways:
 	ENV		STDIN
 	INC		STDOUT
 	ARGV		STDERR
-	ARGVOUT
+	ARGVOUT		_
 	SIG
 
 In particular, the new special C<${^_XYZ}> variables are always taken