1 path=':/bin:/tmp::/:.:/no/such/dir:.' 2 path='/bin:/tmp:/:/no/such/dir' 3 path='/bin:/tmp:/:/no/such/dir' 4 path='/bin':'/tmp':'/':'/no/such/dir' 5 path='/bin':'/tmp':'/':'/no/such/dir' 6 path_/usr/xbin=/opt/xbin/ 7 paths=/bin /tmp / /no/such/dir /opt/xbin 8 PATHS=/BIN /TMP / /NO/SUCH/DIR /OPT/XBIN 9 The answer is 42 10 dirname of 'a/b/c def a.b.c a.b/c a a.a .gitignore a a.a' is 'a/b . . a.b . . . . .' 11 basename of 'a/b/c def a.b.c a.b/c a a.a .gitignore a a.a' is 'c def a.b.c c a a.a .gitignore a a.a' 12 suffix of 'a/b/c def a.b.c a.b/c a a.a .gitignore a a.a' is 'c b/c a gitignore a' 13 root of 'a/b/c def a.b.c a.b/c a a.a .gitignore a a.a' is 'a/b/c def a.b a a a a a' 14 S: 15 C: 16 @: 17 S:empty 18 C:empty 19 @: 20 :a b b c: 21 :a b b c: 22 : b c: 23 :a c: 24 :x__ 3 x__ 3: 25 :a b b c: 26 :a b b c: 27 : b c: 28 make: RE substitution error: (details omitted) 29 make: Unclosed substitution for (, missing) 30 :C,word,____,:Q}: 31 :a c: 32 :x__ 3 x__ 3: 33 :+one+ +two+ +three+: 34 mod-at-resolve:w1d2d3w w2i3w w1i2d3 2i${RES3}w w1d2d3 2i${RES3} 1i${RES2}w: 35 mod-subst-dollar:$1: 36 mod-subst-dollar:$2: 37 mod-subst-dollar:$3: 38 mod-subst-dollar:$4: 39 mod-subst-dollar:$5: 40 mod-subst-dollar:$6: 41 mod-subst-dollar:$7: 42 mod-subst-dollar:$8: 43 mod-subst-dollar:U8: 44 mod-subst-dollar:$$$$: 45 mod-loop-dollar:1: 46 mod-loop-dollar:${word}: 47 mod-loop-dollar:$3$: 48 mod-loop-dollar:$${word}$: 49 mod-loop-dollar:$$5$$: 50 mod-loop-dollar:$$${word}$$: 51 exit status 0 52