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parallel: --tty allows for more programs accessing /dev/tty in parallel.
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@ -210,6 +210,11 @@ Quote of the month:
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<<>>
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New in this release:
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* --tty allows for more programs accessing /dev/tty in parallel. Some programs require tty access without using it.
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* env_parallel --session will record names in current environment in $PARALLEL_IGNORED_NAMES and exit. It is only used with env_parallel, and can work like --record-env but in a single session.
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https://comquest.in/training
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https://bash-prompt.net/guides/parallell-bash/
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https://blog.uta.edu/xus/2017/09/29/an-easy-way-to-run-parallel-jobs-on-stampede2/
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@ -27,7 +27,20 @@ B<env_parallel> is 100 ms slower at startup than pure GNU
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B<parallel>, and takes up to 30% longer to start a job (typically 15 ms).
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Due to the problem with environment space (see below) the recommended
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usage is:
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usage is either:
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# Do --record-env into $PARALLEL_IGNORED_NAMES
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env_parallel --session
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# Define whatever you want to use
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alias myalias=echo
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myvar=it
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myfunc() { myalias $1 $myvar works.; }
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# env_parallel will not export names in $PARALLEL_IGNORED_NAMES
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env_parallel -S localhost myfunc ::: Yay,
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Or:
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# Record the "clean" environment (this only needs to be run once)
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env_parallel --record-env
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@ -42,7 +55,7 @@ usage is:
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# Use --env _ to only transfer the names not in the "empty" environment
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env_parallel --env _ -S localhost myfunc ::: Yay,
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In B<csh>:
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In B<csh> B<--session> is not supported:
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# Record the "clean" environment (this only needs to be run once)
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env_parallel --record-env
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10
src/parallel
10
src/parallel
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@ -2449,7 +2449,6 @@ sub __RUNNING_THE_JOBS_AND_PRINTING_PROGRESS__ {}
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# $Global::host{$sshlogin} = Pointer to SSHLogin-object
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# $Global::total_running = total number of running jobs
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# $Global::total_started = total jobs started
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# $Global::tty_taken = is the tty in use by a running job?
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# $Global::max_procs_file = filename if --jobs is given a filename
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# $Global::JobQueue = JobQueue object for the queue of jobs
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# $Global::timeoutq = queue of times where jobs timeout
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@ -2471,7 +2470,6 @@ sub init_run_jobs {
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# Returns: N/A
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$Global::total_running = 0;
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$Global::total_started = 0;
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$Global::tty_taken = 0;
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$SIG{USR1} = \&list_running_jobs;
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$SIG{USR2} = \&toggle_progress;
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if(@opt::basefile) { setup_basefile(); }
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@ -3927,7 +3925,6 @@ sub reaper {
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# Uses:
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# %Global::sshmaster
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# %Global::running
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# $Global::tty_taken
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# $opt::timeout
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# $Global::timeoutq
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# $opt::halt
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@ -3969,10 +3966,6 @@ sub reaper {
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debug("run", "seq ",$job->seq()," died (", $job->exitstatus(), ")");
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$job->set_endtime(::now());
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if($stiff == $Global::tty_taken) {
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# The process that died had the tty => release it
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$Global::tty_taken = 0;
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}
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my $sshlogin = $job->sshlogin();
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$sshlogin->dec_jobs_running();
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if($job->should_be_retried()) {
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@ -8588,7 +8581,7 @@ sub start {
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}
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$job->set_fh(0,"w",$stdin_fh);
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if($opt::tee) { $job->set_virgin(0); }
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} elsif ($opt::tty and not $Global::tty_taken and -c "/dev/tty" and
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} elsif ($opt::tty and -c "/dev/tty" and
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open(my $devtty_fh, "<", "/dev/tty")) {
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# Give /dev/tty to the command if no one else is using it
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# The eval is needed to catch exception from open3
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@ -8605,7 +8598,6 @@ sub start {
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|| ::die_bug("open3-/dev/tty");
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1;
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};
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$Global::tty_taken = $pid;
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close $devtty_fh;
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$job->set_virgin(0);
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} else {
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@ -2041,6 +2041,8 @@ Record names in current environment in B<$PARALLEL_IGNORED_NAMES> and
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exit. Only used with B<env_parallel>. Aliases, functions, and
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variables with names in B<$PARALLEL_IGNORED_NAMES> will not be copied.
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Only supported in B<Ash, Bash, Dash, Ksh, Sh, and Zsh>.
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See also B<--env>, B<--record-env>.
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@ -2328,13 +2330,13 @@ Silent. The job to be run will not be printed. This is the default.
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Can be reversed with B<-v>.
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=item B<--tty>
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=item B<--tty> (alpha testing)
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Open terminal tty. If GNU B<parallel> is used for starting an
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interactive program then this option may be needed. It will start only
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one job at a time (i.e. B<-j1>), not buffer the output (i.e. B<-u>),
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and it will open a tty for the job. When the job is done, the next job
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will get the tty.
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Open terminal tty. If GNU B<parallel> is used for starting a program
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that accesses the tty (such as an interactive program) then this
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option may be needed. It will default to starting only one job at a
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time (i.e. B<-j1>), not buffer the output (i.e. B<-u>), and it will
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open a tty for the job.
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You can of course override B<-j1> and B<-u>.
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