diff options
Diffstat (limited to 'lib/open3.rb')
-rw-r--r-- | lib/open3.rb | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/lib/open3.rb b/lib/open3.rb new file mode 100644 index 0000000000..9e34acffc9 --- /dev/null +++ b/lib/open3.rb @@ -0,0 +1,55 @@ +# Usage: +# require "open3" +# +# in, out, err = Open3.popen3('nroff -man') +# or +# include Open3 +# in, out, err = popen3('nroff -man') +# + +module Open3 + #[stdin, stdout, stderr] = popen3(command); + def popen3(cmd) + pw = IO::pipe # pipe[0] for read, pipe[1] for write + pr = IO::pipe + pe = IO::pipe + + pid = fork + if pid == nil then # child + pw[1].close + STDIN.reopen(pw[0]) + pw[0].close + + pr[0].close + STDOUT.reopen(pr[1]) + pr[1].close + + pe[0].close + STDERR.reopen(pe[1]) + pe[1].close + + exec(cmd) + exit + else + pw[0].close + pr[1].close + pe[1].close + pi = [ pw[1], pr[0], pe[0] ] + end + end + module_function :popen3 +end + +if $0 == __FILE__ + a = Open3.popen3("nroff -man") + Thread.start do + while gets + a[0].print $_ + end + a[0].close + end + while a[1].gets + print ":", $_ + end +end + |