mirror of
https://github.com/HDFGroup/hdf5.git
synced 2024-11-27 02:10:55 +08:00
88 lines
2.5 KiB
Perl
Executable File
88 lines
2.5 KiB
Perl
Executable File
#!/usr/bin/perl -w
|
|
require 5.003;
|
|
$indent=4;
|
|
|
|
#
|
|
# Copyright by The HDF Group.
|
|
# Copyright by the Board of Trustees of the University of Illinois.
|
|
# All rights reserved.
|
|
#
|
|
# This file is part of HDF5. The full HDF5 copyright notice, including
|
|
# terms governing use, modification, and redistribution, is contained in
|
|
# the COPYING file, which can be found at the root of the source code
|
|
# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
|
|
# If you do not have access to either file, you may request a copy from
|
|
# help@hdfgroup.org.
|
|
#
|
|
|
|
# Run program in background
|
|
#
|
|
use warnings;
|
|
use strict;
|
|
|
|
use Carp;
|
|
use Time::HiRes;
|
|
use POSIX 'setsid';
|
|
|
|
my $child_pid;
|
|
my $child_proc;
|
|
my $cmd = $ARGV[0];
|
|
my $debug = 1;
|
|
|
|
print "\nStart child process\n";
|
|
start_child();
|
|
print "\nStarted child process\n";
|
|
|
|
sub start_child {
|
|
die "cannot execute cmd: $cmd" unless -x $cmd;
|
|
if ($^O eq 'MSWin32') { # Windows
|
|
require Win32::Process;
|
|
Win32::Process::Create($child_proc, $cmd, $cmd, 0, 0, ".") || confess "Could not spawn child: $!";
|
|
$child_pid = $child_proc->GetProcessID();
|
|
}
|
|
else { # Unix
|
|
$SIG{CHLD} = 'IGNORE';
|
|
$child_pid = fork();
|
|
unless (defined $child_pid) {
|
|
confess "Could not spawn child (Unix): $!";
|
|
}
|
|
if ($child_pid == 0) { # child
|
|
unless ($debug) {
|
|
open STDIN, "<", "/dev/null" or die "Can't read /dev/null: $!";
|
|
open STDOUT, ">", "/dev/null" or die "Can't write /dev/null: $!";
|
|
}
|
|
setsid or warn "setsid cannot start a new session: $!";
|
|
unless ($debug) {
|
|
open STDERR, '>&STDOUT' or die "Can't dup stdout: $!";
|
|
}
|
|
local $| = 1;
|
|
unless (exec($cmd)) {
|
|
confess "Could not start child: $cmd: $!";
|
|
CORE::exit(0);
|
|
}
|
|
}
|
|
# parent
|
|
$SIG{CHLD} = 'DEFAULT';
|
|
}
|
|
# catch early child exit, e.g. if program path is incorrect
|
|
sleep(1.0);
|
|
POSIX::waitpid(-1, POSIX::WNOHANG()); # clean up any defunct child process
|
|
if (kill(0,$child_pid)) {
|
|
print "\nStarted child process id $child_pid\n";
|
|
}
|
|
else {
|
|
warn "Child process exited quickly: $cmd: process $child_pid";
|
|
}
|
|
}
|
|
|
|
sub stop_child
|
|
{
|
|
if ($^O eq 'MSWin32') { # Windows
|
|
Win32::Process::KillProcess($child_pid,0);
|
|
}
|
|
else { # Unix
|
|
kill 9, $child_pid || warn "could not kill process $child_pid: $!";
|
|
}
|
|
print "Stopped child process id $child_pid\n";
|
|
}
|