xref: /inferno-os/lib/sh/owen (revision 46439007cf417cbd9ac8049bb4122c890097a0fa)

load std sexprs

# load a job.  result is the new job id.
subfn job {
	{
		id := "{read}
		result=$id
		or {echo load ${quote $*} >[1=0]} {
			raise 'load failed'
		}
	} $* <> /n/remote/admin/clone
}

# load a job.  print the new job id.
fn job {
	echo ${job $*}
}

# load a job, then start it.
fn start {
	id := ${job $*}
	ctl $id start
	echo $id
}

# send a control message to a job.
fn ctl {
	if {~ $#* 0 1} {
		echo usage: ctl job-id request... >[1=2]
		raise usage
	}
	(id args) := $*
	echo ${quote $args} > /n/remote/admin/$id/ctl
}

# mount the scheduler name space
fn mountsched {
	configfile := $configfile		# stop changes propagating out.
	if{no $root}{
		root=/grid/slave
	}
	opts := ()
	fsopts := ()
	schedaddr := ()
	schedfsaddr := ()
	readconfig {
		if{~ $attr schedaddr}{
			schedaddr=$val
		}{~ $attr auth}{
			if{~ $val 0}{
				opts=($opts -A)
			}
		}{~ $attr keyfile}{
			opts=($opts -k $val)
		}{~ $attr schedfsaddr}{
			schedfsaddr=$val
		}{~ $attr fsauth}{
			if{~ $val 0}{
				fsopts=($fsopts -A)
			}
		}{~ $attr fskey fskeyfile}{		# first form is deprecated
			fsopts=($opts -k $val)
		}
	}
	if{no $schedaddr}{
		ifs='
	'
		schedaddr=`{cat /grid/slave/schedaddr}
		if{no $schedaddr}{
			echo no scheduler address found >[1=2]
			raise error
		}
	}
	mount $opts $schedaddr /n/remote
	no $schedfsaddr ||
		mount $fsopts $schedfsaddr /n/gridfs
}

# print a format(2) file with the given format
fn fmtcat {
	if {! ~ $#* 2} {
		echo usage: fmtread fmt file >[1=2]
		raise usage
	}
	(fmt file) := $*
	{echo $fmt >[1=0]; read -o 0; cat} <> $file
}

# readconfig command.
# on entry $configfile is name of configuration file, or empty for default.
# $root is default root directory.
# run command for each entry in the config file, setting $attr and $val
# to the attribute and the value in the entry.
fn readconfig {
	(cmd nil) := $*
	if{no $configfile}{
		if{ftest -f $root/config}{
			configfile = $root/config
		}
	} {
		if{! ~ $configfile '/*' './*'} {
			configfile = $root/$configfile
		}
		if{! ftest -f $configfile}{
			echo cannot find config file $configfile >[1=2]
			raise 'config error'
		}
	}
	if{! no $configfile} {
		< $configfile getsexprs {
			(attr sval) := ${els $sexp}
			if{! ~ $#sval 1}{
				echo bad config line $sexp >[1=2]
				raise continue;
			}
			attr = ${text $attr}
			val := ${text $sval}
			$cmd
		}
	}
}