read.tests   [plain text]

echo " a " | (read x; echo "$x.")

echo " a  b  " | ( read x y ; echo -"$x"-"$y"- )
echo " a  b\ " | ( read x y ; echo -"$x"-"$y"- )
echo " a  b  " | ( read x ; echo -"$x"- )
echo " a  b\ " | ( read x ; echo -"$x"- )

echo " a  b\ " | ( read -r x y ; echo -"$x"-"$y"- )
echo " a  b\ " | ( read -r x ; echo -"$x"- )

echo "\ a  b\ " | ( read -r x y ; echo -"$x"-"$y"- )
echo "\ a  b\ " | ( read -r x ; echo -"$x"- )
echo " \ a  b\ " | ( read -r x y ; echo -"$x"-"$y"- )
echo " \ a  b\ " | ( read -r x ; echo -"$x"- )

# make sure that CTLESC and CTLNUL are passed through correctly
echo $'\001' | ( read var ; recho "$var" )
echo $'\001' | ( read ; recho "$REPLY" )

echo $'\177' | ( read var ; recho "$var" )
echo $'\177' | ( read ; recho "$REPLY" )

# make sure a backslash-quoted \\n still disappears from the input when
# we're not reading in `raw' mode, and no stray CTLESC chars are left in
# the input stream
echo $'ab\\\ncd' | ( read ; recho "$REPLY" )

echo "A B " > /tmp/IN
unset x y z
read x y z < /tmp/IN
echo 1: "x[$x] y[$y] z[$z]"
echo 1a: ${z-z not set}
read x < /tmp/IN
echo 2: "x[$x]"
rm /tmp/IN

# this is where the bash `read' behavior with respect to $REPLY differs
# from ksh93
echo "A B " > /tmp/IN

read < /tmp/IN
echo "[$REPLY]"

rm /tmp/IN

echo " A B " > /tmp/IN

read < /tmp/IN
echo "[$REPLY]"

rm /tmp/IN

# make sure that read with more variables than words sets the extra
# variables to the empty string

bvar=bvar
cvar=cvar
echo aa > /tmp/IN
read avar bvar cvar < /tmp/IN
echo =="$avar"==
echo =="$bvar"==
echo =="$cvar"==

rm /tmp/IN

# test behavior of read with various settings of IFS

echo " foo" | { IFS= read line; recho "$line"; }

echo " foo" | { IFS= ; read line; recho "$line"; }

echo " foo" | { unset IFS ; read line; recho "$line"; }

echo " foo" | { IFS=$'\n' ; read line; recho "$line"; }

echo " foo" | { IFS=$' \n' ; read line; recho "$line"; }

echo " foo" | { IFS=$' \t\n' ; read line; recho "$line"; }

echo " foo" | { IFS=$':' ; read line; recho "$line"; }

# test read -d delim behavior
${THIS_SH} ./read1.sub

# test read -t timeout behavior
${THIS_SH} ./read2.sub

# test read -n nchars behavior
${THIS_SH} ./read3.sub

# test read -u fd behavior
${THIS_SH} ./read4.sub