==== t1 ====
grep t.s /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t1.out

==== t2 ====
grep -w separated /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t1.out

==== t3 ====
grep ^Beginning /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t3.out

==== t4 ====
grep -i end$ /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t4.out

==== t5 ====
egrep '\?|\*$' /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t5.out

==== t6 ====
grep -v [l] /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t6.out

==== t7 ====
grep -x line /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t7.out

==== t8 ====
fgrep line. /home/src/regress/usr.bin/grep/in | diff - /dev/null

==== t9 ====
grep non.existent /home/src/regress/usr.bin/grep/in | diff - /dev/null

==== t10 ====
grep -s foo nonexistentfile | diff - /dev/null

==== t11 ====
grep -C1 examples /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t11.out

==== t12 ====
egrep -f /home/src/regress/usr.bin/grep/t1.out /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t1.out

==== t13 ====
grep 'abcd. abcd.' /home/src/regress/usr.bin/grep/t13.in | diff - /home/src/regress/usr.bin/grep/t13.out

==== t14 ====
test X`grep -w -l u_int /home/src/regress/usr.bin/grep/t14.in` = X/home/src/regress/usr.bin/grep/t14.in

==== t15 ====
grep -w tu /home/src/regress/usr.bin/grep/t15.in | diff - /home/src/regress/usr.bin/grep/t15.out

==== t16 ====
grep -w to /home/src/regress/usr.bin/grep/t15.in | diff - /home/src/regress/usr.bin/grep/t15.out

==== t17 ====
grep -w '^foo' /home/src/regress/usr.bin/grep/t17.in | diff - /home/src/regress/usr.bin/grep/t17.out

==== t18 ====
grep -w '^foo$' /home/src/regress/usr.bin/grep/t17.in | diff - /home/src/regress/usr.bin/grep/t17.out

==== t19 ====
grep  -w 'a.' /home/src/regress/usr.bin/grep/t19.in | diff - /home/src/regress/usr.bin/grep/t19.out
fgrep -w -e 'aa' -e 'a_' /home/src/regress/usr.bin/grep/t19.in | diff - /home/src/regress/usr.bin/grep/t19.out

==== t20 ====
echo '='   | grep  -w  '='  | diff - /dev/null
echo '='   | fgrep -w  '='  | diff - /dev/null
echo 'a='  | grep  -w  'a=' | diff - /dev/null
echo 'a='  | fgrep -w  'a=' | diff - /dev/null
echo '=b'  | grep  -w  '=b' | diff - /dev/null
echo '=b'  | fgrep -w  '=b' | diff - /dev/null
echo 'a=b' | grep  -qw 'a=b'
echo 'a=b' | fgrep -qw 'a=b'
echo '+'   | grep  -w  '+'  | diff - /dev/null
echo '+'   | fgrep -w  '+'  | diff - /dev/null
echo 'a+'  | grep  -w  'a+' | diff - /dev/null
echo 'a+'  | fgrep -w  'a+' | diff - /dev/null
echo '+b'  | grep  -w  '+b' | diff - /dev/null
echo '+b'  | fgrep -w  '+b' | diff - /dev/null
echo 'a+b' | grep  -qw 'a+b'
echo 'a+b' | fgrep -qw 'a+b'

==== t21 ====
grep -l D.e /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t21.out
egrep -l D.e /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t21.out
grep -l '.*D.e' /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t21.out
egrep -l '.*D.e' /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/t21.out

==== t22 ====
grep -l 'a.*b' /home/src/regress/usr.bin/grep/t22.in
/home/src/regress/usr.bin/grep/t22.in

==== t23 ====
egrep -w 'word1|word2|word3' /home/src/regress/usr.bin/grep/t23.in
word1
word1-hyphen
word2|
|word2|
-word3-

==== t24 ====
grep -e '' < /home/src/regress/usr.bin/grep/in | diff - /home/src/regress/usr.bin/grep/in
grep -x -e '' < /home/src/regress/usr.bin/grep/in | diff - /dev/null
grep -f /dev/null < /home/src/regress/usr.bin/grep/in | diff - /dev/null

==== t25 ====
grep -o [ab] /home/src/regress/usr.bin/grep/t25.in | diff - /home/src/regress/usr.bin/grep/t25.out

==== t26 ====
echo 'aaab' | grep -o 'a*' | head -n 10 | diff - /home/src/regress/usr.bin/grep/t26.out

==== t27 ====
grep -A1 'C' /home/src/regress/usr.bin/grep/t27.in | diff - /home/src/regress/usr.bin/grep/t27a.out
grep -B1 'C' /home/src/regress/usr.bin/grep/t27.in | diff - /home/src/regress/usr.bin/grep/t27b.out
grep -C1 'C' /home/src/regress/usr.bin/grep/t27.in | diff - /home/src/regress/usr.bin/grep/t27c.out

==== t28 ====
grep -m 0 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /dev/null
grep -m 1 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_1.out
grep -m 2 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_2.out
grep -m 3 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_3.out
grep -m 4 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_4.out
grep -m 5 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_4.out
grep -m 6 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_4.out
grep -m 7 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_4.out
grep -m 8 -o x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_4.out
grep -m 0 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /dev/null
grep -m 1 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_5.out
grep -m 2 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_6.out
grep -m 3 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_7.out
grep -m 4 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_8.out
grep -m 5 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_8.out
grep -m 6 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_8.out
grep -m 7 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_8.out
grep -m 8 x.y /home/src/regress/usr.bin/grep/t28.in | diff - /home/src/regress/usr.bin/grep/t28_8.out