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# 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")
while ((com | getline fnam) > 0) {
# 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
# --
# /********************************************************\
# * Ulrich Gvbel, goebel@quantum.de *
# * Quantum Gesellschaft f|r Software mbH, Dortmund *
# * phone : +49-231-9749-201 fax: +49-231-9749-3 *
# * private: +49-231-803994 fax: +49-231-803994 *
# \********************************************************/
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