| 1 | package Psh::Joblist; |
| 2 | |
| 3 | use strict; |
| 4 | require Psh::OS; |
| 5 | |
| 6 | my @jobs_order=(); |
| 7 | my %jobs_list=(); |
| 8 | |
| 9 | sub create_job { |
| 10 | my ($pid, $call, $assoc_obj) = @_; |
| 11 | |
| 12 | my $job = new Psh::Job( $pid, $call, $assoc_obj); |
| 13 | $jobs_list{$pid}=$job; |
| 14 | push(@jobs_order,$job); |
| 15 | return $job; |
| 16 | } |
| 17 | |
| 18 | sub delete_job { |
| 19 | my ($pid) = @_; |
| 20 | |
| 21 | my $job= $jobs_list{$pid}; |
| 22 | return if !defined($job); |
| 23 | |
| 24 | delete $jobs_list{$pid}; |
| 25 | my $i; |
| 26 | for($i=0; $i <= $#jobs_order; $i++) { |
| 27 | last if( $jobs_order[$i]==$job); |
| 28 | } |
| 29 | |
| 30 | splice( @jobs_order, $i, 1); |
| 31 | } |
| 32 | |
| 33 | sub job_exists { |
| 34 | my $pid= shift; |
| 35 | |
| 36 | return exists($jobs_list{$pid}); |
| 37 | } |
| 38 | |
| 39 | sub get_job { |
| 40 | my $pid= shift; |
| 41 | return $jobs_list{$pid}; |
| 42 | } |
| 43 | |
| 44 | sub list_jobs { |
| 45 | return @jobs_order; |
| 46 | } |
| 47 | |
| 48 | sub get_job_number { |
| 49 | my $pid= shift; |
| 50 | |
| 51 | for( my $i=0; $i<=$#jobs_order; $i++) { |
| 52 | return $i+1 if( $jobs_order[$i]->{pid}==$pid); |
| 53 | } |
| 54 | return -1; |
| 55 | } |
| 56 | |
| 57 | # |
| 58 | # $pid=Psh::Joblist::find_job([$jobnumber]) |
| 59 | # Finds either the job with the specified job number |
| 60 | # or the highest numbered not running job and returns |
| 61 | # the job or undef is none is found |
| 62 | # |
| 63 | sub find_job { |
| 64 | my $job_to_start= shift; |
| 65 | |
| 66 | return $jobs_order[$job_to_start] if defined( $job_to_start); |
| 67 | |
| 68 | for (my $i = $#jobs_order; $i >= 0; $i--) { |
| 69 | my $job = $jobs_order[$i]; |
| 70 | |
| 71 | if(!$job->{running}) { |
| 72 | return wantarray?($i,$job):$job; |
| 73 | } |
| 74 | } |
| 75 | return undef; |
| 76 | } |
| 77 | |
| 78 | sub find_last_with_name { |
| 79 | my ($name, $runningflag) = @_; |
| 80 | enumerate(); |
| 81 | my $index=0; |
| 82 | while( my $job= Psh::Joblist::each()) { |
| 83 | next if $runningflag && $job->{running}; |
| 84 | my $call= $job->{call}; |
| 85 | if ($call=~ m:([^/\s]+)\s*: ) { |
| 86 | $call= $1; |
| 87 | } elsif( $call=~ m:/([^/\s]+)\s+.*$: ) { |
| 88 | $call= $1; |
| 89 | } elsif ( $call=~ m:^([^/\s]+): ) { |
| 90 | $call= $1; |
| 91 | } |
| 92 | if( $call eq $name) { |
| 93 | return wantarray?($index,$job->{pid},$job->{call}):$index; |
| 94 | } |
| 95 | $index++; |
| 96 | } |
| 97 | return wantarray?():undef; |
| 98 | } |
| 99 | |
| 100 | { |
| 101 | my $pointer; |
| 102 | |
| 103 | # |
| 104 | # Resets the enumeration counter for access using "each" |
| 105 | # |
| 106 | sub enumerate { |
| 107 | $pointer=0; |
| 108 | } |
| 109 | |
| 110 | # |
| 111 | # Returns the next job |
| 112 | # |
| 113 | sub each { |
| 114 | if ($pointer <= $#jobs_order) { |
| 115 | return $jobs_order[$pointer++]; |
| 116 | } |
| 117 | return undef; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | package Psh::Job; |
| 122 | |
| 123 | # |
| 124 | # $job= new Psh::Job( pid, call); |
| 125 | # Creates a new Job object |
| 126 | # pid is the pid of the object |
| 127 | # call is the name of the executed command |
| 128 | # |
| 129 | sub new { |
| 130 | my ( $class, $pid, $call, $assoc_obj ) = @_; |
| 131 | my $self = {}; |
| 132 | bless $self, $class; |
| 133 | $self->{pid}=$pid; |
| 134 | $self->{call}=$call; |
| 135 | $self->{running}=1; |
| 136 | $self->{assoc_obj}=$assoc_obj; |
| 137 | return $self; |
| 138 | } |
| 139 | |
| 140 | # |
| 141 | # $job->run; |
| 142 | # Sends SIGCONT to the job and records it running |
| 143 | # |
| 144 | sub continue { |
| 145 | my $self= shift; |
| 146 | |
| 147 | # minus sign to wake up the whole group of the child: |
| 148 | if( Psh::OS::has_job_control()) { |
| 149 | Psh::OS::resume_job($self); |
| 150 | } |
| 151 | $self->{running}=1; |
| 152 | } |
| 153 | |
| 154 | 1; |
| 155 | __END__ |
| 156 | |
| 157 | =head1 NAME |
| 158 | |
| 159 | Psh::Joblist - A data structure suitable for handling job lists like bash's |
| 160 | |
| 161 | =head1 SYNOPSIS |
| 162 | |
| 163 | use Psh::Joblist; |
| 164 | |
| 165 | $job = Psh::Joblist::create_job($pid,$displayed_command); |
| 166 | |
| 167 | Psh::Joblist::delete_job($pid); |
| 168 | |
| 169 | $job = Psh::Joblist::get_job($pid); |
| 170 | |
| 171 | $flag = Psh::Joblist::job_exists($pid); |
| 172 | |
| 173 | $index = Psh::Joblist::get_job_number($pid); |
| 174 | |
| 175 | $job = Psh::Joblist::find_job(); |
| 176 | $job = Psh::Joblist::find_job($index); |
| 177 | |
| 178 | Psh::Joblist::enumerate(); |
| 179 | while( $job= Psh::Joblist::each()) { ... } |
| 180 | |
| 181 | =head1 DESCRIPTION |
| 182 | |
| 183 | Read the source ;-) |
| 184 | |
| 185 | =head1 AUTHOR |
| 186 | |
| 187 | Markus Peter (warp@spin.de) |
| 188 | |
| 189 | =cut |