[thirdparty/bash.git] / builtins / psize.sh

#! /bin/sh
#
# psize.sh -- determine this system's pipe size, and write a define to
#             pipesize.h so ulimit.c can use it.

: ${TMPDIR:=/tmp}
TMPNAME=pipsize.$$
TMPFILE=$TMPDIR/$TMPNAME

trap 'rm -f $TMPFILE' 0 1 2 3 6 15

echo "/*"
echo " * pipesize.h"
echo " *"
echo " * This file is automatically generated by psize.sh"
echo " * Do not edit!"
echo " */"
echo ""

#
# Try to avoid tempfile races.  We can't really check for the file's
# existance before we run psize.aux, because `test -e' is not portable,
# `test -h' (test for symlinks) is not portable, and `test -f' only
# checks for regular files
#
rm -f $TMPFILE

./psize.aux 2>$TMPFILE | sleep 3

if [ -s $TMPFILE ]; then
	echo "#define PIPESIZE `cat $TMPFILE`"
else
	echo "#define PIPESIZE 512"
fi

exit 0
Commit	Line	Data
726f6388 JA	1	#! /bin/sh
	2	#
	3	# psize.sh -- determine this system's pipe size, and write a define to
	4	# pipesize.h so ulimit.c can use it.
	5
bb70624e	6	: ${TMPDIR:=/tmp}
cce855bc JA	7	TMPNAME=pipsize.$$
	8	TMPFILE=$TMPDIR/$TMPNAME
	9
	10	trap 'rm -f $TMPFILE' 0 1 2 3 6 15
	11
726f6388 JA	12	echo "/*"
	13	echo " * pipesize.h"
	14	echo " *"
	15	echo " * This file is automatically generated by psize.sh"
	16	echo " * Do not edit!"
	17	echo " */"
	18	echo ""
	19
cce855bc JA	20	#
	21	# Try to avoid tempfile races. We can't really check for the file's
	22	# existance before we run psize.aux, because `test -e' is not portable,
	23	# `test -h' (test for symlinks) is not portable, and `test -f' only
	24	# checks for regular files
	25	#
	26	rm -f $TMPFILE
	27
	28	./psize.aux 2>$TMPFILE \| sleep 3
726f6388	29
cce855bc JA	30	if [ -s $TMPFILE ]; then
cce855bc JA	31	echo "#define PIPESIZE `cat $TMPFILE`"
726f6388 JA	32	else
	33	echo "#define PIPESIZE 512"
	34	fi
	35
726f6388	36	exit 0