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authorPerl 5 Porters <perl5-porters@africa.nicoh.com>1997-04-07 00:00:00 +0000
committerChip Salzenberg <chip@atlantic.net>1997-04-07 00:00:00 +0000
commit8cc95fdbe3687330bd987cea170494b4cd263d90 (patch)
treee3a830736fef94663b44fc7cf30f0755de3e09c5 /pod/perlvar.pod
parent1061146bbd7c9a40c4288ec63427c8327cc0d5fa (diff)
downloadperl-8cc95fdbe3687330bd987cea170494b4cd263d90.tar.gz
[inseparable changes from match from perl-5.003_97b to perl-5.003_97c]
BUILD PROCESS Subject: Fix syntax error in Configure comment(!) From: Chip Salzenberg <chip@perl.com> Files: Configure Subject: For Solaris, if -DDEBUGGING, default to '-KPIC', not '-Kpic' From: Chip Salzenberg <chip@perl.com> Files: Configure Subject: Fix usage of dXSUB_SYS, esp. in ExtUtils::Miniperl From: Chip Salzenberg <chip@perl.com> Files: dosish.h minimod.pl os2/os2ish.h plan9/plan9ish.h vms/vmsish.h CORE LANGUAGE CHANGES Subject: Refine setgroups() behavior of C<$)> From: Chip Salzenberg <chip@perl.com> Files: mg.c pod/perldelta.pod pod/perlvar.pod Subject: Forbid -[Mm] on #! line From: Chip Salzenberg <chip@perl.com> Files: pod/perldelta.pod pod/perldiag.pod toke.c CORE PORTABILITY Subject: Special mkdir() for VMS Date: Tue, 08 Apr 1997 12:33:56 -0400 (EDT) From: Charles Bailey <bailey@hmivax.humgen.upenn.edu> Files: dosish.h lib/ExtUtils/MM_Unix.pm lib/File/Path.pm os2/os2ish.h plan9/plan9ish.h pp_sys.c unixish.h vms/vms.c vms/vmsish.h Msg-ID: 01IHGOXN6MZM0004K3@hmivax.humgen.upenn.edu (applied based on p5p patch as commit ebec1d4b2ca9c08d24035a369c7aa782aa058e66) DOCUMENTATION Subject: IO::Socket doc fix Date: Tue, 08 Apr 1997 15:30:43 -0400 From: Roderick Schertler <roderick@argon.org> Files: ext/IO/lib/IO/Socket.pm Msg-ID: 28383.860527843@eeyore.ibcinc.com (applied based on p5p patch as commit 4a51304ce091cb6d1ccc9f25e11753bd7d985b32) LIBRARY AND EXTENSIONS Subject: Replace Class::Template with improved Class::Struct From: Jim Miner <jfm@winternet.com> Files: MANIFEST lib/Class/Struct.pm lib/Class/Template.pm lib/File/stat.pm lib/Net/hostent.pm lib/Net/netent.pm lib/Net/protoent.pm lib/Net/servent.pm lib/Time/gmtime.pm lib/Time/localtime.pm lib/Time/tm.pm lib/User/grent.pm lib/User/pwent.pm pod/perldelta.pod pod/perlfaq7.pod pod/perlmod.pod pod/perltoot.pod Subject: MakeMaker pathname patch Date: Wed, 9 Apr 1997 20:08:23 +0100 From: Nick Ing-Simmons <nik@tiuk.ti.com> Files: lib/ExtUtils/MM_Unix.pm lib/ExtUtils/MakeMaker.pm Msg-ID: 199704091908.UAA00877@ni-s.u-net.com (applied based on p5p patch as commit 9cbbd68ff8edc7de96e3471de49538d0b2b98173) Subject: Fix configuration of new socket From: Chip Salzenberg <chip@perl.com> Files: ext/IO/lib/IO/Socket.pm
Diffstat (limited to 'pod/perlvar.pod')
-rw-r--r--pod/perlvar.pod33
1 files changed, 23 insertions, 10 deletions
diff --git a/pod/perlvar.pod b/pod/perlvar.pod
index 00b97bad1e..198e5c12a3 100644
--- a/pod/perlvar.pod
+++ b/pod/perlvar.pod
@@ -490,8 +490,9 @@ The effective uid of this process. Example:
$< = $>; # set real to effective uid
($<,$>) = ($>,$<); # swap real and effective uid
-(Mnemonic: it's the uid you went I<TO>, if you're running setuid.) Note:
-"C<$E<lt>>" and "C<$E<gt>>" can be swapped on only machines supporting setreuid().
+(Mnemonic: it's the uid you went I<TO>, if you're running setuid.)
+Note: "C<$E<lt>>" and "C<$E<gt>>" can be swapped only on machines
+supporting setreuid().
=item $REAL_GROUP_ID
@@ -503,8 +504,14 @@ The real gid of this process. If you are on a machine that supports
membership in multiple groups simultaneously, gives a space separated
list of groups you are in. The first number is the one returned by
getgid(), and the subsequent ones by getgroups(), one of which may be
-the same as the first number. (Mnemonic: parentheses are used to I<GROUP>
-things. The real gid is the group you I<LEFT>, if you're running setgid.)
+the same as the first number.
+
+However, a value assigned to "C<$(>" must be a single number used to
+set the real gid. So the value given by "C<$(>" should I<not> be assigned
+back to "C<$(>" without being forced numeric, such as by adding zero.
+
+(Mnemonic: parentheses are used to I<GROUP> things. The real gid is the
+group you I<LEFT>, if you're running setgid.)
=item $EFFECTIVE_GROUP_ID
@@ -516,15 +523,21 @@ The effective gid of this process. If you are on a machine that
supports membership in multiple groups simultaneously, gives a space
separated list of groups you are in. The first number is the one
returned by getegid(), and the subsequent ones by getgroups(), one of
-which may be the same as the first number. (Mnemonic: parentheses are
-used to I<GROUP> things. The effective gid is the group that's I<RIGHT> for
-you, if you're running setgid.)
+which may be the same as the first number.
+
+Similarly, a value assigned to "C<$)>" must also be a space-separated
+list of numbers. The first number is used to set the effective gid, and
+the rest (if any) are passed to setgroups(). To get the effect of an
+empty list for setgroups(), just repeat the new effective gid; that is,
+to force an effective gid of 5 and an effectively empty setgroups()
+list, say C< $) = "5 5" >.
+
+(Mnemonic: parentheses are used to I<GROUP> things. The effective gid
+is the group that's I<RIGHT> for you, if you're running setgid.)
Note: "C<$E<lt>>", "C<$E<gt>>", "C<$(>" and "C<$)>" can be set only on
machines that support the corresponding I<set[re][ug]id()> routine. "C<$(>"
-and "C<$)>" can be swapped on only machines supporting setregid(). Because
-Perl doesn't currently use initgroups(), you can't set your group vector to
-multiple groups.
+and "C<$)>" can be swapped only on machines supporting setregid().
=item $PROGRAM_NAME