# From: megaadm@rina.quantum.de

# Subject: Bug report - closing down pipes which read from shell com

# To: bug-gnu-utils@prep.ai.mit.edu

# Date: Thu, 27 Feb 1997 23:19:16 +0100 (CET)

# CC: arnold@gnu.ai.mit.edu

# 

# Hello people,

# 

# i think i found a bug or something mysterious behaviour in

# gawk Version 3.0 patchlevel 0.

# 

# I am running on linux 2.0.25 under bash.

# 

# Could you please have a look at the following awk program

# an let me please know, if this is what i expect it to,

# namely a bug.

# 

# ----------- cut here --------------------------------------------

BEGIN	{

			# OS is linux 2.0.25

			# shell is bash

			# Gnu Awk (gawk) 3.0, patchlevel 0

			# The command i typed on the shell was "gawk -f <this_prog> -"

			#com = "cal 01 1997"

			com = ("cat " SRCDIR "/pipeio2.in")

			# Don't use empty lines, because Windows ECHO does

			# something different when invoked without arguments

			while ((com | getline fnam) > 0 && fnam != "") {

#				com_tr = "echo " fnam " | tr [0-9]. ..........."

#				com_tr = "echo " fnam " | sed 's/[0-9]/./g'"

				com_tr = "echo " fnam " | sed \"s/[0-9]/./g\""

				# print "\'" com_tr "\'"

				print "'" com_tr "'"

				com_tr | getline nam

				print nam

				# please run that program and take a look at the

				# output. I think this is what was expected.

				# Then comment in the following 4 lines and see

				# what happens. I expect the first pipe "com | getline"

				# not to be close, but i think this is exactly what happens

				# So, is this ok ?

				if (close(com_tr) < 0) {

					print ERRNO

					break

				}

			}

			close(com)

		}

# ----------- cut here --------------------------------------------

# 

# There is another thing i do not understand.

# Why doesn't the awk - command "close" reports an

# error, if i would say close("abc") which i had never

# openend ?

# 

# Regards,

# Ulrich Gvbel

# -- 

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