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|00000000| 53 75 62 6a 65 63 74 3a | 20 20 76 30 37 69 30 39 |Subject:|  v07i09|
|00000010| 30 3a 20 20 46 69 6e 64 | 20 73 65 63 75 72 69 74 |0:  Find| securit|
|00000020| 79 20 68 6f 6c 65 73 20 | 69 6e 20 73 68 65 6c 6c |y holes |in shell|
|00000030| 2d 65 73 63 61 70 65 73 | 0a 4e 65 77 73 67 72 6f |-escapes|.Newsgro|
|00000040| 75 70 73 3a 20 6d 6f 64 | 2e 73 6f 75 72 63 65 73 |ups: mod|.sources|
|00000050| 0a 41 70 70 72 6f 76 65 | 64 3a 20 6d 69 72 72 6f |.Approve|d: mirro|
|00000060| 72 21 72 73 0a 0a 53 75 | 62 6d 69 74 74 65 64 20 |r!rs..Su|bmitted |
|00000070| 62 79 3a 20 69 68 6e 70 | 34 21 75 74 7a 6f 6f 21 |by: ihnp|4!utzoo!|
|00000080| 68 63 72 21 68 63 72 76 | 78 31 21 68 75 67 68 0a |hcr!hcrv|x1!hugh.|
|00000090| 4d 6f 64 2e 73 6f 75 72 | 63 65 73 3a 20 56 6f 6c |Mod.sour|ces: Vol|
|000000a0| 75 6d 65 20 37 2c 20 49 | 73 73 75 65 20 39 30 0a |ume 7, I|ssue 90.|
|000000b0| 41 72 63 68 69 76 65 2d | 6e 61 6d 65 3a 20 66 6f |Archive-|name: fo|
|000000c0| 72 6b 74 65 73 74 0a 0a | 49 20 77 6f 75 6c 64 20 |rktest..|I would |
|000000d0| 6c 69 6b 65 20 74 6f 20 | 73 75 62 6d 69 74 20 74 |like to |submit t|
|000000e0| 68 65 20 66 6f 6c 6c 6f | 77 69 6e 67 20 70 72 6f |he follo|wing pro|
|000000f0| 67 72 61 6d 20 74 6f 20 | 6d 6f 64 2e 73 6f 75 72 |gram to |mod.sour|
|00000100| 63 65 73 2e 20 20 49 20 | 68 6f 70 65 0a 74 68 61 |ces.  I |hope.tha|
|00000110| 74 20 74 68 65 20 63 6f | 6d 6d 65 6e 74 73 20 61 |t the co|mments a|
|00000120| 72 65 20 73 75 66 66 69 | 63 69 65 6e 74 20 65 78 |re suffi|cient ex|
|00000130| 70 6c 61 6e 61 74 69 6f | 6e 2e 20 20 49 20 64 6f |planatio|n.  I do|
|00000140| 6e 27 74 20 73 65 65 20 | 74 68 61 74 20 61 0a 6d |n't see |that a.m|
|00000150| 61 6e 75 61 6c 20 69 73 | 20 77 6f 72 74 68 77 68 |anual is| worthwh|
|00000160| 69 6c 65 2e 0a 0a 49 20 | 68 61 76 65 20 72 75 6e |ile...I |have run|
|00000170| 20 74 68 69 73 20 70 72 | 6f 67 72 61 6d 20 75 6e | this pr|ogram un|
|00000180| 64 65 72 20 53 79 73 74 | 65 6d 20 56 20 61 6e 64 |der Syst|em V and|
|00000190| 20 56 65 72 73 69 6f 6e | 20 37 2e 20 20 49 20 68 | Version| 7.  I h|
|000001a0| 61 76 65 20 6e 6f 74 0a | 74 65 73 74 65 64 20 69 |ave not.|tested i|
|000001b0| 74 20 75 6e 64 65 72 20 | 42 53 44 2c 20 62 75 74 |t under |BSD, but|
|000001c0| 20 49 20 6b 6e 6f 77 20 | 6f 66 20 6e 6f 20 69 6d | I know |of no im|
|000001d0| 70 65 64 69 6d 65 6e 74 | 2e 0a 0a 57 69 74 68 20 |pediment|...With |
|000001e0| 74 68 69 73 20 70 72 6f | 67 72 61 6d 2c 20 49 20 |this pro|gram, I |
|000001f0| 68 61 76 65 20 66 6f 75 | 6e 64 20 62 75 67 73 20 |have fou|nd bugs |
|00000200| 69 6e 20 61 20 6e 75 6d | 62 65 72 20 6f 66 20 55 |in a num|ber of U|
|00000210| 4e 49 58 20 53 79 73 74 | 65 6d 20 56 0a 75 74 69 |NIX Syst|em V.uti|
|00000220| 6c 69 74 69 65 73 2e 20 | 20 49 20 61 6d 20 73 75 |lities. | I am su|
|00000230| 72 65 20 74 68 61 74 20 | 42 53 44 20 70 72 6f 67 |re that |BSD prog|
|00000240| 72 61 6d 73 20 77 6f 75 | 6c 64 20 62 65 20 6a 75 |rams wou|ld be ju|
|00000250| 73 74 20 61 73 20 62 75 | 67 67 79 2c 20 62 75 74 |st as bu|ggy, but|
|00000260| 0a 49 20 68 61 76 65 6e | 27 74 20 74 65 73 74 65 |.I haven|'t teste|
|00000270| 64 20 74 68 65 6d 2e 20 | 20 48 65 72 65 20 61 72 |d them. | Here ar|
|00000280| 65 20 73 6f 6d 65 20 65 | 78 61 6d 70 6c 65 73 3a |e some e|xamples:|
|00000290| 0a 0a 50 72 6f 67 72 61 | 6d 73 20 74 68 61 74 20 |..Progra|ms that |
|000002a0| 6c 65 61 76 65 20 65 78 | 74 72 61 20 66 69 6c 65 |leave ex|tra file|
|000002b0| 20 64 65 73 63 72 69 70 | 74 6f 72 73 20 6f 70 65 | descrip|tors ope|
|000002c0| 6e 3a 0a 20 20 20 20 20 | 73 64 62 20 21 20 63 6f |n:.     |sdb ! co|
|000002d0| 6d 6d 61 6e 64 0a 20 20 | 20 20 20 6d 61 69 6c 78 |mmand.  |   mailx|
|000002e0| 20 7e 21 20 63 6f 6d 6d | 61 6e 64 20 64 75 72 69 | ~! comm|and duri|
|000002f0| 6e 67 20 6d 65 73 73 61 | 67 65 20 63 6f 6d 70 6f |ng messa|ge compo|
|00000300| 73 69 74 69 6f 6e 2c 20 | 61 6e 64 20 21 20 63 6f |sition, |and ! co|
|00000310| 6d 6d 61 6e 64 20 28 74 | 77 6f 20 65 78 74 72 61 |mmand (t|wo extra|
|00000320| 29 0a 20 20 20 20 20 6d | 61 69 6c 20 21 20 63 6f |).     m|ail ! co|
|00000330| 6d 6d 61 6e 64 0a 20 20 | 20 20 20 72 6e 20 21 20 |mmand.  |   rn ! |
|00000340| 6f 72 20 7c 20 63 6f 6d | 6d 61 6e 64 20 28 35 20 |or | com|mand (5 |
|00000350| 65 78 74 72 61 21 29 0a | 20 20 20 20 20 63 75 20 |extra!).|     cu |
|00000360| 7e 21 20 63 6f 6d 6d 61 | 6e 64 20 28 6f 6e 65 20 |~! comma|nd (one |
|00000370| 65 78 74 72 61 3a 20 6e | 75 6d 62 65 72 20 35 29 |extra: n|umber 5)|
|00000380| 0a 0a 50 72 6f 67 72 61 | 6d 73 20 74 68 61 74 20 |..Progra|ms that |
|00000390| 6c 65 61 76 65 20 73 69 | 67 6e 61 6c 73 20 69 67 |leave si|gnals ig|
|000003a0| 6e 6f 72 65 64 3a 0a 20 | 20 20 20 20 6d 61 69 6c |nored:. |    mail|
|000003b0| 78 20 7e 21 20 63 6f 6d | 6d 61 6e 64 20 28 53 49 |x ~! com|mand (SI|
|000003c0| 47 49 4e 54 21 29 0a 20 | 20 20 20 20 72 6e 20 21 |GINT!). |    rn !|
|000003d0| 20 61 6e 64 20 7c 20 63 | 6f 6d 6d 61 6e 64 73 20 | and | c|ommands |
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|00000430| 20 68 6f 70 65 20 70 72 | 6f 67 72 61 6d 6d 65 72 | hope pr|ogrammer|
|00000440| 73 20 77 69 6c 6c 20 75 | 73 65 20 46 6f 72 6b 54 |s will u|se ForkT|
|00000450| 65 73 74 20 74 6f 20 63 | 61 74 63 68 20 74 68 69 |est to c|atch thi|
|00000460| 73 20 74 79 70 65 20 6f | 66 20 62 75 67 0a 65 61 |s type o|f bug.ea|
|00000470| 72 6c 79 2e 20 20 45 78 | 65 72 63 69 73 65 20 66 |rly.  Ex|ercise f|
|00000480| 6f 72 20 74 68 65 20 72 | 65 61 64 65 72 3a 20 77 |or the r|eader: w|
|00000490| 68 61 74 20 63 61 6e 20 | 79 6f 75 20 73 63 72 69 |hat can |you scri|
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|000004d0| 20 52 65 64 65 6c 6d 65 | 69 65 72 20 28 34 31 36 | Redelme|ier (416|
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|00000520| 2d 2d 72 24 20 20 5d 0a | 2d 2d 2d 2d 2d 2d 2d 2d |--r$  ].|--------|
|00000530| 2d 2d 43 55 54 20 48 45 | 52 45 2d 2d 2d 2d 2d 2d |--CUT HE|RE------|
|00000540| 2d 2d 2d 2d 0a 0a 23 21 | 20 2f 62 69 6e 2f 73 68 |----..#!| /bin/sh|
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|00000630| 6f 72 6b 74 65 73 74 2e | 63 0a 23 20 57 72 61 70 |orktest.|c.# Wrap|
|00000640| 70 65 64 20 62 79 20 72 | 73 40 6d 69 72 72 6f 72 |ped by r|s@mirror|
|00000650| 20 6f 6e 20 57 65 64 20 | 44 65 63 20 31 30 20 31 | on Wed |Dec 10 1|
|00000660| 33 3a 34 34 3a 34 36 20 | 31 39 38 36 0a 50 41 54 |3:44:46 |1986.PAT|
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|000011b0| 65 20 3c 65 72 72 6e 6f | 2e 68 3e 0a 58 65 78 74 |e <errno|.h>.Xext|
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|000011e0| 5f 65 72 72 6c 69 73 74 | 5b 5d 3b 0a 58 0a 58 23 |_errlist|[];.X.X#|
|000011f0| 69 6e 63 6c 75 64 65 20 | 3c 73 69 67 6e 61 6c 2e |include |<signal.|
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|00001210| 61 6c 28 29 29 28 29 3b | 0a 58 0a 58 6d 61 69 6e |al())();|.X.Xmain|
|00001220| 28 61 72 67 63 2c 20 61 | 72 67 76 2c 20 65 6e 76 |(argc, a|rgv, env|
|00001230| 70 29 0a 58 69 6e 74 20 | 61 72 67 63 3b 0a 58 63 |p).Xint |argc;.Xc|
|00001240| 68 61 72 20 2a 2a 61 72 | 67 76 2c 20 2a 2a 65 6e |har **ar|gv, **en|
|00001250| 76 70 3b 0a 58 7b 0a 58 | 09 72 65 67 69 73 74 65 |vp;.X{.X|.registe|
|00001260| 72 20 69 6e 74 20 69 3b | 0a 58 09 75 6e 73 69 67 |r int i;|.X.unsig|
|00001270| 6e 65 64 20 61 6c 20 3d | 20 61 6c 61 72 6d 28 30 |ned al =| alarm(0|
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|000012a0| 58 0a 58 09 70 72 69 6e | 74 66 28 22 25 64 20 61 |X.X.prin|tf("%d a|
|000012b0| 72 67 28 73 29 3a 22 2c | 20 61 72 67 63 29 3b 0a |rg(s):",| argc);.|
|000012c0| 58 09 66 6f 72 20 28 69 | 3d 30 3b 20 69 3c 61 72 |X.for (i|=0; i<ar|
|000012d0| 67 63 3b 20 69 2b 2b 29 | 0a 58 09 09 69 66 20 28 |gc; i++)|.X..if (|
|000012e0| 61 72 67 76 5b 69 5d 20 | 3d 3d 20 4e 55 4c 4c 29 |argv[i] |== NULL)|
|000012f0| 0a 58 09 09 09 70 72 69 | 6e 74 66 28 22 20 4e 55 |.X...pri|ntf(" NU|
|00001300| 4c 4c 21 22 29 3b 0a 58 | 09 09 65 6c 73 65 0a 58 |LL!");.X|..else.X|
|00001310| 09 09 09 70 72 69 6e 74 | 66 28 22 20 5c 22 25 73 |...print|f(" \"%s|
|00001320| 5c 22 22 2c 20 61 72 67 | 76 5b 69 5d 29 3b 0a 58 |\"", arg|v[i]);.X|
|00001330| 09 70 72 69 6e 74 66 28 | 22 5c 6e 22 29 3b 0a 58 |.printf(|"\n");.X|
|00001340| 09 69 66 20 28 61 72 67 | 76 5b 61 72 67 63 5d 20 |.if (arg|v[argc] |
|00001350| 21 3d 20 4e 55 4c 4c 29 | 0a 58 09 09 70 72 69 6e |!= NULL)|.X..prin|
|00001360| 74 66 28 22 41 72 67 20 | 6c 69 73 74 20 69 73 20 |tf("Arg |list is |
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|00001380| 20 4e 55 4c 4c 21 5c 6e | 22 29 3b 0a 58 0a 58 09 | NULL!\n|");.X.X.|
|00001390| 70 72 69 6e 74 66 28 22 | 52 65 61 6c 20 55 49 44 |printf("|Real UID|
|000013a0| 20 3d 20 25 64 2c 20 47 | 49 44 20 3d 20 25 64 3b | = %d, G|ID = %d;|
|000013b0| 20 45 66 66 65 63 74 69 | 76 65 20 55 49 44 20 3d | Effecti|ve UID =|
|000013c0| 20 25 64 2c 20 47 49 44 | 20 3d 20 25 64 2e 5c 6e | %d, GID| = %d.\n|
|000013d0| 22 2c 0a 58 09 09 67 65 | 74 75 69 64 28 29 2c 20 |",.X..ge|tuid(), |
|000013e0| 67 65 74 67 69 64 28 29 | 2c 20 67 65 74 65 75 69 |getgid()|, geteui|
|000013f0| 64 28 29 2c 20 67 65 74 | 65 67 69 64 28 29 29 3b |d(), get|egid());|
|00001400| 0a 58 0a 58 09 69 66 20 | 28 61 6c 29 0a 58 09 09 |.X.X.if |(al).X..|
|00001410| 70 72 69 6e 74 66 28 22 | 41 6c 61 72 6d 20 73 65 |printf("|Alarm se|
|00001420| 74 20 74 6f 20 67 6f 20 | 6f 66 66 20 69 6e 20 25 |t to go |off in %|
|00001430| 75 20 73 65 63 6f 6e 64 | 73 2e 5c 6e 22 2c 20 61 |u second|s.\n", a|
|00001440| 6c 29 3b 0a 58 0a 58 09 | 70 72 69 6e 74 66 28 22 |l);.X.X.|printf("|
|00001450| 46 69 6c 65 20 44 65 73 | 63 72 69 70 74 6f 72 73 |File Des|criptors|
|00001460| 3a 5c 6e 22 29 3b 0a 58 | 09 66 6f 72 20 28 69 3d |:\n");.X|.for (i=|
|00001470| 30 3b 20 69 21 3d 34 30 | 3b 20 69 2b 2b 29 09 2f |0; i!=40|; i++)./|
|00001480| 2a 20 49 20 68 6f 70 65 | 20 34 30 20 69 73 20 65 |* I hope| 40 is e|
|00001490| 6e 6f 75 67 68 2e 20 2a | 2f 0a 58 09 09 69 66 20 |nough. *|/.X..if |
|000014a0| 28 66 73 74 61 74 28 69 | 2c 20 26 73 62 29 20 3d |(fstat(i|, &sb) =|
|000014b0| 3d 20 2d 31 29 20 7b 0a | 58 09 09 09 69 66 20 28 |= -1) {.|X...if (|
|000014c0| 65 72 72 6e 6f 20 21 3d | 20 45 42 41 44 46 29 0a |errno !=| EBADF).|
|000014d0| 58 09 09 09 09 70 72 69 | 6e 74 66 28 22 5c 74 25 |X....pri|ntf("\t%|
|000014e0| 64 20 65 72 72 6f 72 3a | 20 25 73 5c 6e 22 2c 20 |d error:| %s\n", |
|000014f0| 69 2c 20 73 79 73 5f 65 | 72 72 6c 69 73 74 5b 65 |i, sys_e|rrlist[e|
|00001500| 72 72 6e 6f 5d 29 3b 0a | 58 09 09 7d 20 65 6c 73 |rrno]);.|X..} els|
|00001510| 65 20 7b 0a 58 09 09 09 | 70 72 69 6e 74 66 28 22 |e {.X...|printf("|
|00001520| 5c 74 25 64 3a 20 64 65 | 76 3d 25 64 2c 20 69 6e |\t%d: de|v=%d, in|
|00001530| 6f 3d 25 64 2c 20 70 65 | 72 6d 3d 30 25 30 34 6f |o=%d, pe|rm=0%04o|
|00001540| 2c 20 22 2c 0a 58 09 09 | 09 09 69 2c 20 73 62 2e |, ",.X..|..i, sb.|
|00001550| 73 74 5f 64 65 76 2c 20 | 73 62 2e 73 74 5f 69 6e |st_dev, |sb.st_in|
|00001560| 6f 2c 20 73 62 2e 73 74 | 5f 6d 6f 64 65 26 30 37 |o, sb.st|_mode&07|
|00001570| 37 37 37 29 3b 0a 58 09 | 09 09 73 77 69 74 63 68 |777);.X.|..switch|
|00001580| 20 28 73 62 2e 73 74 5f | 6d 6f 64 65 20 26 20 53 | (sb.st_|mode & S|
|00001590| 5f 49 46 4d 54 29 20 7b | 0a 58 09 09 09 63 61 73 |_IFMT) {|.X...cas|
|000015a0| 65 20 53 5f 49 46 52 45 | 47 3a 0a 58 09 09 09 09 |e S_IFRE|G:.X....|
|000015b0| 70 72 69 6e 74 66 28 22 | 70 69 70 65 20 6f 72 20 |printf("|pipe or |
|000015c0| 72 65 67 75 6c 61 72 20 | 66 69 6c 65 5c 6e 22 29 |regular |file\n")|
|000015d0| 3b 0a 58 09 09 09 09 62 | 72 65 61 6b 3b 0a 58 09 |;.X....b|reak;.X.|
|000015e0| 09 09 2f 2a 20 65 78 74 | 65 6e 64 20 61 73 20 64 |../* ext|end as d|
|000015f0| 65 73 69 72 65 64 20 2a | 2f 0a 58 09 09 09 64 65 |esired *|/.X...de|
|00001600| 66 61 75 6c 74 3a 0a 58 | 09 09 09 09 70 72 69 6e |fault:.X|....prin|
|00001610| 74 66 28 22 49 46 4d 54 | 3d 30 25 6f 5c 6e 22 2c |tf("IFMT|=0%o\n",|
|00001620| 20 73 62 2e 73 74 5f 6d | 6f 64 65 3e 3e 31 32 29 | sb.st_m|ode>>12)|
|00001630| 3b 0a 58 09 09 09 09 62 | 72 65 61 6b 3b 0a 58 09 |;.X....b|reak;.X.|
|00001640| 09 09 7d 0a 58 09 09 7d | 0a 58 0a 58 09 70 72 69 |..}.X..}|.X.X.pri|
|00001650| 6e 74 66 28 22 53 69 67 | 6e 61 6c 73 3a 5c 6e 22 |ntf("Sig|nals:\n"|
|00001660| 29 3b 0a 58 09 66 6f 72 | 20 28 69 3d 31 3b 20 69 |);.X.for| (i=1; i|
|00001670| 21 3d 34 30 3b 20 69 2b | 2b 29 20 7b 09 2f 2a 20 |!=40; i+|+) {./* |
|00001680| 49 20 68 6f 70 65 20 34 | 30 20 69 73 20 65 6e 6f |I hope 4|0 is eno|
|00001690| 75 67 68 2e 20 2a 2f 0a | 58 09 09 72 65 67 69 73 |ugh. */.|X..regis|
|000016a0| 74 65 72 20 69 6e 74 20 | 6e 20 3d 20 28 69 6e 74 |ter int |n = (int|
|000016b0| 29 20 73 69 67 6e 61 6c | 28 69 2c 20 53 49 47 5f |) signal|(i, SIG_|
|000016c0| 49 47 4e 29 3b 0a 58 09 | 09 73 77 69 74 63 68 20 |IGN);.X.|.switch |
|000016d0| 28 6e 29 20 7b 0a 58 09 | 09 63 61 73 65 20 2d 31 |(n) {.X.|.case -1|
|000016e0| 3a 0a 58 09 09 63 61 73 | 65 20 53 49 47 5f 44 46 |:.X..cas|e SIG_DF|
|000016f0| 4c 3a 0a 58 09 09 09 62 | 72 65 61 6b 3b 0a 58 09 |L:.X...b|reak;.X.|
|00001700| 09 63 61 73 65 20 53 49 | 47 5f 49 47 4e 3a 0a 58 |.case SI|G_IGN:.X|
|00001710| 09 09 09 70 72 69 6e 74 | 66 28 22 5c 74 25 64 3a |...print|f("\t%d:|
|00001720| 20 53 49 47 5f 49 47 4e | 5c 6e 22 2c 20 69 29 3b | SIG_IGN|\n", i);|
|00001730| 0a 58 09 09 09 62 72 65 | 61 6b 3b 0a 58 09 09 64 |.X...bre|ak;.X..d|
|00001740| 65 66 61 75 6c 74 3a 0a | 58 09 09 09 70 72 69 6e |efault:.|X...prin|
|00001750| 74 66 28 22 5c 74 25 64 | 3a 20 25 64 5c 6e 22 2c |tf("\t%d|: %d\n",|
|00001760| 20 69 2c 20 6e 29 3b 0a | 58 09 09 09 62 72 65 61 | i, n);.|X...brea|
|00001770| 6b 3b 0a 58 09 09 7d 0a | 58 09 7d 0a 58 0a 58 09 |k;.X..}.|X.}.X.X.|
|00001780| 70 72 69 6e 74 66 28 22 | 45 6e 76 69 72 6f 6e 6d |printf("|Environm|
|00001790| 65 6e 74 3a 5c 6e 22 29 | 3b 0a 58 09 66 6f 72 20 |ent:\n")|;.X.for |
|000017a0| 28 69 3d 30 3b 20 65 6e | 76 70 5b 69 5d 21 3d 4e |(i=0; en|vp[i]!=N|
|000017b0| 55 4c 4c 3b 20 69 2b 2b | 29 0a 58 09 09 70 72 69 |ULL; i++|).X..pri|
|000017c0| 6e 74 66 28 22 5c 74 5c | 22 25 73 5c 22 5c 6e 22 |ntf("\t\|"%s\"\n"|
|000017d0| 2c 20 65 6e 76 70 5b 69 | 5d 29 3b 0a 58 0a 58 09 |, envp[i|]);.X.X.|
|000017e0| 65 78 69 74 28 30 29 3b | 0a 58 7d 0a 40 2f 2f 45 |exit(0);|.X}.@//E|
|000017f0| 2a 4f 2a 46 20 66 6f 72 | 6b 74 65 73 74 2e 63 2f |*O*F for|ktest.c/|
|00001800| 2f 0a 69 66 20 74 65 73 | 74 20 33 30 35 39 20 2d |/.if tes|t 3059 -|
|00001810| 6e 65 20 22 60 77 63 20 | 2d 63 20 3c 27 66 6f 72 |ne "`wc |-c <'for|
|00001820| 6b 74 65 73 74 2e 63 27 | 60 22 3b 20 74 68 65 6e |ktest.c'|`"; then|
|00001830| 0a 20 20 20 20 65 63 68 | 6f 20 73 68 61 72 3a 20 |.    ech|o shar: |
|00001840| 65 72 72 6f 72 20 74 72 | 61 6e 73 6d 69 74 74 69 |error tr|ansmitti|
|00001850| 6e 67 20 22 27 66 6f 72 | 6b 74 65 73 74 2e 63 27 |ng "'for|ktest.c'|
|00001860| 22 20 27 28 73 68 6f 75 | 6c 64 20 68 61 76 65 20 |" '(shou|ld have |
|00001870| 62 65 65 6e 20 33 30 35 | 39 20 63 68 61 72 61 63 |been 305|9 charac|
|00001880| 74 65 72 73 29 27 0a 66 | 69 0a 66 69 20 23 20 65 |ters)'.f|i.fi # e|
|00001890| 6e 64 20 6f 66 20 6f 76 | 65 72 77 72 69 74 69 6e |nd of ov|erwritin|
|000018a0| 67 20 63 68 65 63 6b 0a | 65 63 68 6f 20 73 68 61 |g check.|echo sha|
|000018b0| 72 3a 20 22 45 6e 64 20 | 6f 66 20 73 68 65 6c 6c |r: "End |of shell|
|000018c0| 20 61 72 63 68 69 76 65 | 2e 22 0a 65 78 69 74 20 | archive|.".exit |
|000018d0| 30 0a                   |                         |0.      |        |
+--------+-------------------------+-------------------------+--------+--------+