code: plan9front

ref: a14f9efa6848f167f54dea3e3823b31dae1461c9
dir: /rc/bin/src/

#!/bin/rc

rfork e

sym = 'threadmain?z
	main?z'

fn dbsrc{
	echo $sym | db $1 | sed '1d;/symbol not found/d;s/.*\(\) //'
}

fn go{
	type=`{file <$1 | sed 's/stdin: //'}
	switch($type){
	case 'Ascii'
		plumbit $1 '(ascii file)'
	case 'rc executable file'
		plumbit $1 '(rc executable)'
	case *executable* *'plan 9 boot image'*
		plumbit  `{dbsrc $1} '(executable)'
	case *
		echo 'src: can''t find source for '$1 - unrecognized type $type >[1=2]
	}
}

fn plumbit{B $1}

fn usage{
	echo usage: 'src [-n] [-s symbol] executable ...'>[1=2]
	exit usage
}

while(~ $1 -*)
	switch($1){
	case -n
		shift
		fn plumbit {echo $1}
	case -s
		shift
		# add main in case symbol is undefined
		sym=$1'?z
			main?z'
		shift
	case -*
		usage
	}

if(~ $#* 0)
	usage
for(i in $*){
	if(~ $i /*)
		test -f $i && go $i && exit
	if not
		for(f in $path^/^$i)
			test -x $f && go $f && exit
	echo 'src: can''t find '$i
}