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authorJagadeesh Krishnanjanappa <jkrishnanjanappa@mvista.com>2015-08-17 20:40:21 +0530
committerJoe MacDonald <joe_macdonald@mentor.com>2015-09-11 10:39:00 -0400
commit4b532090206695db8902222dd60f7e1948d5aac8 (patch)
treef5ddd9a9370838deda5dc3862fc993196cb37547 /meta-networking/recipes-extended/mime-construct/files/WaitStat.pm
parentd3eaede791c121147f1b99db01facd2080019993 (diff)
downloadmeta-openembedded-contrib-4b532090206695db8902222dd60f7e1948d5aac8.tar.gz
mime-construct: add new recipe
mime-construct constructs and (by default) mails MIME messages. It is entirely driven from the command line, it is designed to be used by other programs, or people who act like programs." Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa@mvista.com> Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
Diffstat (limited to 'meta-networking/recipes-extended/mime-construct/files/WaitStat.pm')
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diff --git a/meta-networking/recipes-extended/mime-construct/files/WaitStat.pm b/meta-networking/recipes-extended/mime-construct/files/WaitStat.pm
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+# $Id: WaitStat.pm,v 1.3 1999-10-21 12:39:43-04 roderick Exp $
+#
+# Copyright (c) 1997 Roderick Schertler. All rights reserved. This
+# program is free software; you can redistribute it and/or modify it
+# under the same terms as Perl itself.
+
+=head1 NAME
+
+Proc::WaitStat - Interpret and act on wait() status values
+
+=head1 SYNOPSIS
+
+ $description = waitstat $?;
+ exit waitstat_reuse $?;
+ waitstat_die $?, 'program-name';
+ close_die COMMAND, 'program-name';
+
+=head1 DESCRIPTION
+
+This module contains functions for interpreting and acting on wait
+status values.
+
+Nothing is exported by default.
+
+=over
+
+=cut
+
+package Proc::WaitStat;
+
+use 5.003_98; # piped close errno resetting
+use strict;
+use vars qw($VERSION @ISA @EXPORT_OK);
+
+use Carp qw(croak);
+use Exporter ();
+use IPC::Signal qw(sig_name);
+use POSIX qw(:sys_wait_h);
+
+$VERSION = '1.00';
+@ISA = qw(Exporter);
+@EXPORT_OK = qw(waitstat waitstat_reuse waitstat_die close_die);
+
+=item B<waitstat> I<wait-status>
+
+Returns a string representation of wait() status value I<wait-status>.
+Values returned are like C<"0"> and C<"64"> and C<"killed (SIGHUP)">.
+
+This function is prototyped to take a single scalar argument.
+
+=cut
+
+sub waitstat ($) {
+ my $status = shift;
+
+ if (WIFEXITED $status) {
+ WEXITSTATUS $status
+ }
+ elsif (WIFSIGNALED $status) {
+ # XXX WCOREDUMP
+ 'killed (SIG' . sig_name(WTERMSIG $status) . ')'
+ }
+ elsif (WIFSTOPPED $status) {
+ 'stopped (SIG' . sig_name(WSTOPSIG $status) . ')'
+ }
+ # XXX WIFCONTINUED
+ else {
+ "invalid wait status $status"
+ }
+}
+
+=item B<waitstat_reuse> I<wait-status>
+
+Turn I<wait-status> into a value which can be passed to B<exit>, converted
+in the same manner the shell uses. If I<wait-status> indicates a normal
+exit, return the exit value. If I<wait-status> instead indicates death by
+signal, return 128 plus the signal number.
+
+This function is prototyped to take a single scalar argument.
+
+=cut
+
+sub waitstat_reuse ($) {
+ my $status = shift;
+
+ if (WIFEXITED $status) {
+ WEXITSTATUS $status
+ }
+ elsif (WIFSIGNALED $status) {
+ 128 + WTERMSIG $status
+ }
+ elsif (WIFSTOPPED $status) {
+ 128 + WSTOPSIG $status
+ }
+ else {
+ croak "Invalid wait status $status";
+ }
+}
+
+=item B<waitstat_die> I<wait-status> I<program-name>
+
+die() if I<wait-status> is non-zero (mentioning I<program-name> as the
+source of the error).
+
+This function is prototyped to take two scalar arguments.
+
+=cut
+
+sub waitstat_die ($$) {
+ my ($status, $program) = @_;
+ croak "Non-zero exit (" . waitstat($status) .
+ ") from $program"
+ if $status;
+}
+
+=item B<close_die> I<filehandle> I<name>
+
+Close I<filehandle>, if that fails die() with an appropriate message
+which refers to I<name>. This handles failed closings of both programs
+and files properly.
+
+This function is prototyped to take a filehandle (actually, a glob ref)
+and a scalar.
+
+=cut
+
+sub close_die (*$) {
+ my ($fh, $name) = @_;
+
+ unless (ref $fh || ref \$fh eq 'GLOB') {
+ require Symbol;
+ $fh = Symbol::qualify_to_ref($fh, caller);
+ }
+
+ unless (close $fh) {
+ croak "Error closing $name: ",
+ $!+0 ? "$!" : 'non-zero exit (' . waitstat($?) . ')';
+ }
+}
+
+1
+
+__END__
+
+=back
+
+=head1 EXAMPLES
+
+ close SENDMAIL;
+ exit if $? == 0;
+ log "sendmail failure: ", waitstat $?;
+ exit EX_TEMPFAIL;
+
+ $pid == waitpid $pid, 0 or croak "Failed to reap $pid: $!";
+ exit waitstat_reuse $?;
+
+ $output = `some-program -with args`;
+ waitstat_die $?, 'some-program';
+ print "Output from some-process:\n", $output;
+
+ open PROGRAM, '| post-processor' or die "Can't fork: $!";
+ while (<IN>) {
+ print PROGRAM pre_process $_
+ or die "Error writing to post-processor: $!";
+ }
+ # This handles both flush failures at close time and a non-zero exit
+ # from the subprocess.
+ close_die PROGRAM, 'post-processor';
+
+=head1 AUTHOR
+
+Roderick Schertler <F<roderick@argon.org>>
+
+=head1 SEE ALSO
+
+perl(1), IPC::Signal(3pm).
+
+=cut