Source Code 1992 March

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Tape Archive | 1989-03-03 | 24.0 KB
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You can browse this item here: egetopt.tar
Confidence	Program	Detection	Match Type	Support
`100%`	dexvert	Tape Archive `(archive/tar)`	magic	Supported
`100%`	file	tar archive	default
`99%`	file	tar archive (V7), file egetopt/, mode 755 , uid 243 , gid 12 , size 0 , seconds 4403603175	default
`98%`	file	data	default
`100%`	siegfried	x-fmt/265 Tape Archive Format	default
`100%`	lsar	Tar	default
`100%`	gt2	TAR Archiv gefunden (Auflistung ist deaktiviert)	default
`100%`	disktype	Pre-POSIX tar archive	default
hex view
+--------+-------------------------+-------------------------+--------+--------+
|00000000| 65 67 65 74 6f 70 74 2f | 00 00 00 00 00 00 00 00 |egetopt/|........|
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|00000200| 65 67 65 74 6f 70 74 2f | 52 45 41 44 4d 45 00 00 |egetopt/|README..|
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|00000400| 65 67 65 74 6f 70 74 2e | 63 20 2d 2d 20 45 78 74 |egetopt.|c -- Ext|
|00000410| 65 6e 64 65 64 20 27 67 | 65 74 6f 70 74 27 2e 0a |ended 'g|etopt'..|
|00000420| 0a 41 20 77 68 69 6c 65 | 20 62 61 63 6b 2c 20 61 |.A while| back, a|
|00000430| 20 70 75 62 6c 69 63 2d | 64 6f 6d 61 69 6e 20 76 | public-|domain v|
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|00000470| 20 6c 61 74 65 72 2c 20 | 61 20 67 65 6e 74 6c 65 | later, |a gentle|
|00000480| 6d 61 6e 20 62 79 20 74 | 68 65 20 6e 61 6d 65 20 |man by t|he name |
|00000490| 6f 66 20 4b 65 69 74 68 | 20 42 6f 73 74 69 63 20 |of Keith| Bostic |
|000004a0| 6d 61 64 65 20 73 6f 6d | 65 0a 65 6e 68 61 6e 63 |made som|e.enhanc|
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|000004f0| 38 29 20 74 68 65 72 65 | 20 68 61 73 20 62 65 65 |8) there| has bee|
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|00000510| 61 74 65 64 20 64 69 73 | 63 75 73 73 69 6f 6e 20 |ated dis|cussion |
|00000520| 69 6e 20 63 6f 6d 70 2e | 6c 61 6e 67 2e 63 20 61 |in comp.|lang.c a|
|00000530| 62 6f 75 74 20 74 68 65 | 20 6d 65 72 69 74 73 20 |bout the| merits |
|00000540| 61 6e 64 20 64 72 61 77 | 62 61 63 6b 73 20 6f 66 |and draw|backs of|
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|000005e0| 20 63 68 61 6e 67 65 73 | 20 74 68 61 74 20 49 20 | changes| that I |
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|00000650| 54 68 65 20 64 65 66 61 | 75 6c 74 20 62 65 68 61 |The defa|ult beha|
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|00000700| 6f 66 20 73 6f 6d 65 20 | 67 6c 6f 62 61 6c 20 76 |of some |global v|
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|00000870| 0a 65 67 65 74 6f 70 74 | 28 29 20 62 65 68 61 76 |.egetopt|() behav|
|00000880| 65 73 20 6c 69 6b 65 20 | 67 65 74 6f 70 74 28 29 |es like |getopt()|
|00000890| 20 77 69 74 68 20 74 68 | 65 20 66 6f 6c 6c 6f 77 | with th|e follow|
|000008a0| 69 6e 67 20 61 64 64 65 | 64 20 63 61 70 61 62 69 |ing adde|d capabi|
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|00000900| 20 6e 6f 77 20 73 74 6f | 72 65 64 20 69 6e 20 61 | now sto|red in a|
|00000910| 20 67 6c 6f 62 61 6c 20 | 69 6e 74 65 67 65 72 20 | global |integer |
|00000920| 63 61 6c 6c 65 64 20 27 | 6f 70 74 62 61 64 27 2c |called '|optbad',|
|00000930| 20 61 6e 64 20 74 68 65 | 20 63 61 6c 6c 65 72 0a | and the| caller.|
|00000940| 09 63 61 6e 20 73 65 74 | 20 74 68 69 73 20 76 61 |.can set| this va|
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|00000960| 20 20 54 68 65 20 69 6e | 69 74 69 61 6c 20 76 61 |  The in|itial va|
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|00000980| 69 73 0a 20 20 20 20 09 | 27 3f 27 2c 20 77 68 69 |is.    .|'?', whi|
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|000009f0| 20 65 67 65 74 6f 70 74 | 28 29 20 74 6f 20 72 65 | egetopt|() to re|
|00000a00| 74 75 72 6e 20 27 7e 27 | 0a 20 20 20 20 09 69 6e |turn '~'|.    .in|
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|00000a50| 20 20 20 09 6c 69 6e 65 | 73 20 69 6e 20 79 6f 75 |   .line|s in you|
|00000a60| 72 20 63 6f 64 65 20 62 | 65 66 6f 72 65 20 65 67 |r code b|efore eg|
|00000a70| 65 74 6f 70 74 28 29 20 | 67 65 74 73 20 63 61 6c |etopt() |gets cal|
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|00000a90| 6e 74 20 6f 70 74 62 61 | 64 3b 0a 09 09 6f 70 74 |nt optba|d;...opt|
|00000aa0| 62 61 64 20 3d 20 28 69 | 6e 74 29 27 7e 27 3b 0a |bad = (i|nt)'~';.|
|00000ab0| 0a 2d 2d 09 4f 70 74 69 | 6f 6e 73 20 63 61 6e 20 |.--.Opti|ons can |
|00000ac0| 62 65 67 69 6e 20 77 69 | 74 68 20 63 68 61 72 61 |begin wi|th chara|
|00000ad0| 63 74 65 72 73 20 6f 74 | 68 65 72 20 74 68 61 6e |cters ot|her than|
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|00000b20| 73 74 61 72 74 27 2e 20 | 20 49 74 20 70 6f 69 6e |start'. | It poin|
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|00000b40| 77 68 69 63 68 20 63 6f | 6e 73 69 73 74 73 20 6f |which co|nsists o|
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|00000b90| 20 69 6e 69 74 69 61 6c | 20 73 74 72 69 6e 67 20 | initial| string |
|00000ba0| 74 68 61 74 20 27 6f 70 | 74 73 74 61 72 74 27 0a |that 'op|tstart'.|
|00000bb0| 09 70 6f 69 6e 74 73 20 | 74 6f 20 69 73 20 22 2d |.points |to is "-|
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|00000c10| 61 6e 74 20 74 6f 20 61 | 6c 6c 6f 77 20 62 6f 74 |ant to a|llow bot|
|00000c20| 68 20 27 2b 27 20 61 6e | 64 20 27 2d 27 0a 20 20 |h '+' an|d '-'.  |
|00000c30| 20 20 09 61 73 20 6f 70 | 74 69 6f 6e 20 64 65 6c |  .as op|tion del|
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|00000c60| 20 69 6e 20 79 6f 75 72 | 20 63 6f 64 65 0a 20 20 | in your| code.  |
|00000c70| 20 20 09 62 65 66 6f 72 | 65 20 65 67 65 74 6f 70 |  .befor|e egetop|
|00000c80| 74 28 29 20 67 65 74 73 | 20 63 61 6c 6c 65 64 3a |t() gets| called:|
|00000c90| 0a 0a 09 09 65 78 74 65 | 72 6e 20 63 68 61 72 20 |....exte|rn char |
|00000ca0| 2a 6f 70 74 73 74 61 72 | 74 3b 0a 09 09 6f 70 74 |*optstar|t;...opt|
|00000cb0| 73 74 61 72 74 20 3d 20 | 22 2d 2b 22 3b 0a 0a 2d |start = |"-+";..-|
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|00000d60| 28 29 2c 20 74 68 65 20 | 67 6c 6f 62 61 6c 20 69 |(), the |global i|
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|00000dc0| 30 20 69 66 0a 09 74 68 | 65 72 65 20 77 61 73 20 |0 if..th|ere was |
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|00000e00| 6f 64 65 0a 09 61 6e 64 | 20 79 6f 75 20 63 61 6e |ode..and| you can|
|00000e10| 20 63 68 65 63 6b 20 74 | 68 65 20 76 61 6c 75 65 | check t|he value|
|00000e20| 20 6f 66 20 27 6f 70 74 | 63 68 61 72 27 20 61 66 | of 'opt|char' af|
|00000e30| 74 65 72 20 65 61 63 68 | 20 63 61 6c 6c 20 74 6f |ter each| call to|
|00000e40| 0a 09 65 67 65 74 6f 70 | 74 28 29 3a 0a 0a 09 09 |..egetop|t():....|
|00000e50| 65 78 74 65 72 6e 20 69 | 6e 74 20 6f 70 74 63 68 |extern i|nt optch|
|00000e60| 61 72 3b 0a 0a 2d 2d 09 | 54 68 65 20 6f 6c 64 20 |ar;..--.|The old |
|00000e70| 67 65 74 6f 70 74 28 29 | 20 77 72 69 74 65 73 20 |getopt()| writes |
|00000e80| 65 72 72 6f 72 20 6d 65 | 73 73 61 67 65 73 20 74 |error me|ssages t|
|00000e90| 6f 20 66 69 6c 65 20 64 | 65 73 63 72 69 70 74 6f |o file d|escripto|
|00000ea0| 72 20 32 0a 09 28 6f 72 | 20 74 6f 20 73 74 64 65 |r 2..(or| to stde|
|00000eb0| 72 72 2c 20 64 65 70 65 | 6e 64 69 6e 67 20 6f 6e |rr, depe|nding on|
|00000ec0| 20 79 6f 75 72 20 69 6d | 70 6c 65 6d 65 6e 74 61 | your im|plementa|
|00000ed0| 74 69 6f 6e 29 2e 20 20 | 49 6e 20 65 67 65 74 6f |tion).  |In egeto|
|00000ee0| 70 74 28 29 2c 0a 09 79 | 6f 75 20 63 61 6e 20 63 |pt(),..y|ou can c|
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|00000f30| 69 6e 74 65 67 65 72 20 | 27 6f 70 74 65 72 72 66 |integer |'opterrf|
|00000f40| 64 27 20 63 6f 6e 74 61 | 69 6e 73 20 74 68 65 20 |d' conta|ins the |
|00000f50| 66 69 6c 65 20 64 65 73 | 63 72 69 70 74 6f 72 0a |file des|criptor.|
|00000f60| 09 74 6f 20 75 73 65 20 | 66 6f 72 20 77 72 69 74 |.to use |for writ|
|00000f70| 69 6e 67 20 65 72 72 6f | 72 20 6d 65 73 73 61 67 |ing erro|r messag|
|00000f80| 65 73 2e 20 20 41 73 20 | 79 6f 75 20 6d 69 67 68 |es.  As |you migh|
|00000f90| 74 20 68 61 76 65 20 67 | 75 65 73 73 65 64 2c 0a |t have g|uessed,.|
|00000fa0| 09 74 68 69 73 20 76 61 | 72 69 61 62 6c 65 20 69 |.this va|riable i|
|00000fb0| 73 20 69 6e 69 74 69 61 | 6c 69 7a 65 64 20 74 6f |s initia|lized to|
|00000fc0| 20 32 2e 20 20 41 73 20 | 61 6e 20 65 78 61 6d 70 | 2.  As |an examp|
|00000fd0| 6c 65 2c 20 69 66 20 79 | 6f 75 20 77 61 6e 74 0a |le, if y|ou want.|
|00000fe0| 09 79 6f 75 72 20 65 67 | 65 74 6f 70 74 28 29 20 |.your eg|etopt() |
|00000ff0| 65 72 72 6f 72 73 20 74 | 6f 20 67 6f 20 74 6f 20 |errors t|o go to |
|00001000| 74 68 65 20 66 69 6c 65 | 20 22 65 67 65 74 6f 70 |the file| "egetop|
|00001010| 74 2e 65 72 72 73 22 2c | 20 64 6f 0a 20 20 20 20 |t.errs",| do.    |
|00001020| 09 73 6f 6d 65 74 68 69 | 6e 67 20 73 69 6d 69 6c |.somethi|ng simil|
|00001030| 61 72 20 74 6f 20 74 68 | 65 20 66 6f 6c 6c 6f 77 |ar to th|e follow|
|00001040| 69 6e 67 20 62 65 66 6f | 72 65 20 63 61 6c 6c 69 |ing befo|re calli|
|00001050| 6e 67 20 65 67 65 74 6f | 70 74 28 29 3a 0a 0a 09 |ng egeto|pt():...|
|00001060| 09 65 78 74 65 72 6e 20 | 69 6e 74 20 6f 70 74 65 |.extern |int opte|
|00001070| 72 72 66 64 3b 0a 0a 09 | 09 46 49 4c 45 20 2a 65 |rrfd;...|.FILE *e|
|00001080| 6f 75 74 20 3d 20 66 6f | 70 65 6e 28 22 65 67 65 |out = fo|pen("ege|
|00001090| 74 6f 70 74 2e 65 72 72 | 73 22 2c 20 22 77 22 29 |topt.err|s", "w")|
|000010a0| 3b 0a 0a 09 09 69 66 20 | 28 65 6f 75 74 20 3d 3d |;....if |(eout ==|
|000010b0| 20 28 46 49 4c 45 29 4e | 55 4c 4c 29 20 7b 0a 09 | (FILE)N|ULL) {..|
|000010c0| 09 09 2f 2a 20 65 72 72 | 6f 72 20 63 6f 6e 64 69 |../* err|or condi|
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|000010e0| 65 78 69 74 28 31 29 3b | 0a 09 09 7d 0a 0a 09 09 |exit(1);|...}....|
|000010f0| 6f 70 74 65 72 72 66 64 | 20 3d 20 66 69 6c 65 6e |opterrfd| = filen|
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|00001120| 73 20 6f 66 20 67 65 74 | 6f 70 74 28 29 20 61 6c |s of get|opt() al|
|00001130| 6c 6f 77 20 79 6f 75 20 | 74 6f 20 73 65 74 20 74 |low you |to set t|
|00001140| 68 65 20 67 6c 6f 62 61 | 6c 0a 09 69 6e 74 65 67 |he globa|l..integ|
|00001150| 65 72 20 27 6f 70 74 65 | 72 72 27 20 74 6f 20 63 |er 'opte|rr' to c|
|00001160| 6f 6e 74 72 6f 6c 20 77 | 68 65 74 68 65 72 20 65 |ontrol w|hether e|
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|000011f0| 6c 65 73 20 65 72 72 6f | 72 20 6f 75 74 70 75 74 |les erro|r output|
|00001200| 2e 0a 09 49 6e 20 65 67 | 65 74 6f 70 74 28 29 2c |...In eg|etopt(),|
|00001210| 20 27 6f 70 74 65 72 72 | 27 20 69 73 20 74 72 65 | 'opterr|' is tre|
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|000012c0| 6c 6f 62 61 6c 20 69 6e | 74 65 67 65 72 20 63 61 |lobal in|teger ca|
|000012d0| 6c 6c 65 64 20 27 6f 70 | 74 6e 65 65 64 27 20 77 |lled 'op|tneed' w|
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|00001330| 41 73 20 79 6f 75 20 6d | 69 67 68 74 0a 20 20 20 |As you m|ight.   |
|00001340| 20 09 68 61 76 65 20 73 | 75 73 70 65 63 74 65 64 | .have s|uspected|
|00001350| 2c 20 27 6f 70 74 6e 65 | 65 64 27 20 69 73 20 69 |, 'optne|ed' is i|
|00001360| 6e 69 74 69 61 6c 69 7a | 65 64 20 74 6f 20 27 3a |nitializ|ed to ':|
|00001370| 27 2e 0a 0a 09 49 6e 20 | 61 64 64 69 74 69 6f 6e |'....In |addition|
|00001380| 2c 20 73 6f 6d 65 74 68 | 69 6e 67 20 74 68 61 74 |, someth|ing that|
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|000013b0| 68 65 20 6f 6c 64 0a 09 | 67 65 74 6f 70 74 28 29 |he old..|getopt()|
|000013c0| 20 69 73 20 69 74 73 20 | 69 6e 61 62 69 6c 69 74 | is its |inabilit|
|000013d0| 79 20 74 6f 20 68 61 6e | 64 6c 65 20 6e 6f 6e 2d |y to han|dle non-|
|000013e0| 6d 61 6e 64 61 74 6f 72 | 79 20 6f 70 74 69 6f 6e |mandator|y option|
|000013f0| 20 61 72 67 75 6d 65 6e | 74 73 2e 0a 09 46 6f 72 | argumen|ts...For|
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|00001410| 6f 70 74 69 6f 6e 20 63 | 61 6c 6c 65 64 20 27 64 |option c|alled 'd|
|00001420| 27 20 77 61 73 20 73 70 | 65 63 69 66 69 65 64 20 |' was sp|ecified |
|00001430| 61 73 20 74 61 6b 69 6e | 67 0a 09 61 6e 20 61 72 |as takin|g..an ar|
|00001440| 67 75 6d 65 6e 74 20 74 | 6f 20 74 68 65 20 70 72 |gument t|o the pr|
|00001450| 6f 67 72 61 6d 20 27 66 | 6f 6f 27 2c 20 79 6f 75 |ogram 'f|oo', you|
|00001460| 27 64 20 67 65 74 20 74 | 68 65 20 66 6f 6c 6c 6f |'d get t|he follo|
|00001470| 77 69 6e 67 0a 09 72 65 | 73 75 6c 74 73 20 77 68 |wing..re|sults wh|
|00001480| 65 6e 20 69 6e 76 6f 6b | 69 6e 67 20 27 66 6f 6f |en invok|ing 'foo|
|00001490| 27 20 69 6e 20 64 69 66 | 66 65 72 65 6e 74 20 77 |' in dif|ferent w|
|000014a0| 61 79 73 3a 0a 0a 09 31 | 29 09 66 6f 6f 20 2d 64 |ays:...1|).foo -d|
|000014b0| 41 42 43 20 2d 78 20 2e | 2e 2e 0a 0a 09 09 09 67 |ABC -x .|.......g|
|000014c0| 65 74 6f 70 74 28 29 20 | 72 65 74 75 72 6e 3a 09 |etopt() |return:.|
|000014d0| 27 64 27 0a 09 09 09 6f | 70 74 61 72 67 3a 09 09 |'d'....o|ptarg:..|
|000014e0| 09 22 41 42 43 22 0a 0a | 09 32 29 09 66 6f 6f 20 |."ABC"..|.2).foo |
|000014f0| 2d 64 41 42 43 20 2d 78 | 20 2e 2e 2e 0a 0a 09 09 |-dABC -x| .......|
|00001500| 09 67 65 74 6f 70 74 28 | 29 20 72 65 74 75 72 6e |.getopt(|) return|
|00001510| 3a 09 27 64 27 0a 09 09 | 09 6f 70 74 61 72 67 3a |:.'d'...|.optarg:|
|00001520| 09 09 09 22 41 42 43 22 | 0a 0a 09 33 29 09 66 6f |..."ABC"|...3).fo|
|00001530| 6f 20 2d 64 20 2d 78 20 | 2e 2e 2e 0a 0a 09 09 41 |o -d -x |.......A|
|00001540| 29 09 67 65 74 6f 70 74 | 28 29 20 72 65 74 75 72 |).getopt|() retur|
|00001550| 6e 3a 09 27 64 27 0a 09 | 09 09 6f 70 74 61 72 67 |n:.'d'..|..optarg|
|00001560| 3a 09 09 09 22 2d 78 22 | 0a 0a 09 49 6e 20 74 68 |:..."-x"|...In th|
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|00001580| 20 33 2c 20 73 6f 6d 65 | 74 69 6d 65 73 20 6f 6e | 3, some|times on|
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|000015b0| 67 65 74 6f 70 74 28 29 | 20 72 65 74 75 72 6e 3a |getopt()| return:|
|000015c0| 09 27 64 27 0a 09 09 09 | 6f 70 74 61 72 67 3a 09 |.'d'....|optarg:.|
|000015d0| 09 09 4e 55 4c 4c 0a 0a | 09 54 68 69 73 20 77 6f |..NULL..|.This wo|
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|00001620| 2e 20 20 49 6e 20 74 68 | 65 20 6f 6c 64 20 67 65 |.  In th|e old ge|
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|00001660| 74 68 65 20 66 69 72 73 | 74 20 63 68 61 72 61 63 |the firs|t charac|
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|00001680| 61 6e 64 20 64 65 63 72 | 65 6d 65 6e 74 69 6e 67 |and decr|ementing|
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|000016b0| 27 2d 27 2e 20 20 48 6f | 77 65 76 65 72 2c 20 73 |'-'.  Ho|wever, s|
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|00001740| 53 69 6e 63 65 20 74 68 | 69 73 20 62 65 68 61 76 |Since th|is behav|
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|00001930| 09 6f 70 74 6e 65 65 64 | 20 3d 20 28 69 6e 74 29 |.optneed| = (int)|
|00001940| 27 21 27 3b 09 2f 2a 20 | 75 73 65 20 27 21 27 20 |'!';./* |use '!' |
|00001950| 69 6e 73 74 65 61 64 20 | 6f 66 20 27 3a 27 2f 0a |instead |of ':'/.|
|00001960| 09 09 6f 70 74 6d 61 79 | 62 65 20 3d 20 28 69 6e |..optmay|be = (in|
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|00001af0| 2d 63 20 2d 62 20 2e 2e | 2e 0a 0a 09 09 09 65 67 |-c -b ..|......eg|
|00001b00| 65 74 6f 70 74 28 29 20 | 72 65 74 75 72 6e 3a 09 |etopt() |return:.|
|00001b10| 27 61 27 0a 09 09 09 6f | 70 74 61 72 67 3a 09 09 |'a'....o|ptarg:..|
|00001b20| 09 4e 55 4c 4c 0a 0a 09 | 09 09 65 67 65 74 6f 70 |.NULL...|..egetop|
|00001b30| 74 28 29 20 72 65 74 75 | 72 6e 3a 09 27 63 27 0a |t() retu|rn:.'c'.|
|00001b40| 09 09 09 6f 70 74 61 72 | 67 3a 09 09 09 22 41 42 |...optar|g:..."AB|
|00001b50| 43 22 0a 0a 09 09 09 65 | 67 65 74 6f 70 74 28 29 |C".....e|getopt()|
|00001b60| 20 72 65 74 75 72 6e 3a | 09 27 64 27 0a 09 09 09 | return:|.'d'....|
|00001b70| 6f 70 74 61 72 67 3a 09 | 09 09 22 58 59 5a 22 0a |optarg:.|.."XYZ".|
|00001b80| 0a 09 3e 3e 3e 3e 3e 3e | 3e 3e 3e 3e 09 65 67 65 |..>>>>>>|>>>>.ege|
|00001b90| 74 6f 70 74 28 29 20 72 | 65 74 75 72 6e 3a 09 27 |topt() r|eturn:.'|
|00001ba0| 64 27 0a 09 3e 3e 3e 3e | 3e 3e 3e 3e 3e 3e 09 6f |d'..>>>>|>>>>>>.o|
|00001bb0| 70 74 61 72 67 3a 09 09 | 09 4e 55 4c 4c 0a 09 3e |ptarg:..|.NULL..>|
|00001bc0| 3e 20 4e 4f 54 45 20 3e | 3e 0a 09 3e 3e 3e 3e 3e |> NOTE >|>..>>>>>|
|00001bd0| 3e 3e 3e 3e 3e 09 65 67 | 65 74 6f 70 74 28 29 20 |>>>>>.eg|etopt() |
|00001be0| 72 65 74 75 72 6e 3a 09 | 27 78 27 0a 09 3e 3e 3e |return:.|'x'..>>>|
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|00001ea0| 0a 43 75 72 72 65 6e 74 | 20 76 65 72 73 69 6f 6e |.Current| version|
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|00001f40| 2e 2e 21 61 6d 65 73 21 | 66 78 67 72 70 21 6c 6a |..!ames!|fxgrp!lj|
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|00002000| 65 67 65 74 6f 70 74 2f | 4d 61 6b 65 66 69 6c 65 |egetopt/|Makefile|
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|00002200| 23 0a 23 20 4d 61 6b 65 | 66 69 6c 65 20 66 6f 72 |#.# Make|file for|
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|000022a0| 63 63 20 2d 6f 20 64 65 | 6d 6f 20 64 65 6d 6f 2e |cc -o de|mo demo.|
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|00002600| 23 69 6e 63 6c 75 64 65 | 20 3c 73 74 64 69 6f 2e |#include| <stdio.|
|00002610| 68 3e 0a 0a 2f 2a 0a 20 | 2a 20 54 68 69 73 20 69 |h>../*. |* This i|
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|00002630| 6d 20 66 6f 72 20 64 65 | 6d 6f 6e 73 74 72 61 74 |m for de|monstrat|
|00002640| 69 6e 67 20 74 68 65 20 | 63 61 70 61 62 69 6c 69 |ing the |capabili|
|00002650| 74 69 65 73 20 6f 66 20 | 65 67 65 74 6f 70 74 28 |ties of |egetopt(|
|00002660| 29 2e 0a 20 2a 20 52 75 | 6e 20 69 74 20 77 69 74 |).. * Ru|n it wit|
|00002670| 68 20 76 61 72 69 6f 75 | 73 20 63 6f 6d 62 69 6e |h variou|s combin|
|00002680| 61 74 69 6f 6e 73 20 6f | 66 20 6f 70 74 69 6f 6e |ations o|f option|
|00002690| 73 20 61 6e 64 20 61 72 | 67 75 6d 65 6e 74 73 20 |s and ar|guments |
|000026a0| 6f 6e 20 74 68 65 20 63 | 6f 6d 6d 61 6e 64 0a 20 |on the c|ommand. |
|000026b0| 2a 20 6c 69 6e 65 20 74 | 6f 20 73 65 65 20 68 6f |* line t|o see ho|
|000026c0| 77 20 65 67 65 74 6f 70 | 74 28 29 20 77 6f 72 6b |w egetop|t() work|
|000026d0| 73 2e 0a 20 2a 0a 20 2a | 20 45 78 70 65 72 69 6d |s.. *. *| Experim|
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|00002760| 2d 61 20 61 6e 64 20 2d | 62 20 74 61 6b 65 20 6e |-a and -|b take n|
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|00002780| 2d 63 20 61 6e 64 20 2d | 64 20 74 61 6b 65 20 6d |-c and -|d take m|
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|00002810| 23 64 65 66 69 6e 65 20 | 4f 50 54 5f 43 48 41 52 |#define |OPT_CHAR|
|00002820| 53 09 22 2d 2b 3d 22 0a | 2f 2a 20 4d 65 61 6e 69 |S."-+=".|/* Meani|
|00002830| 6e 67 3a 0a 20 2a 0a 20 | 2a 20 4f 70 74 69 6f 6e |ng:. *. |* Option|
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|00002850| 20 27 2d 27 2c 20 27 2b | 27 2c 20 6f 72 20 27 3d | '-', '+|', or '=|
|00002860| 27 2e 0a 20 2a 2f 0a 0a | 0a 2f 2a 0a 20 2a 20 4e |'.. */..|./*. * N|
|00002870| 65 77 20 67 6c 6f 62 61 | 6c 20 76 61 72 69 61 62 |ew globa|l variab|
|00002880| 6c 65 73 20 75 73 65 64 | 20 69 6e 20 65 67 65 74 |les used| in eget|
|00002890| 6f 70 74 28 29 20 6f 6e | 6c 79 3a 0a 20 2a 2f 0a |opt() on|ly:. */.|
|000028a0| 65 78 74 65 72 6e 20 69 | 6e 74 20 6f 70 74 6e 65 |extern i|nt optne|
|000028b0| 65 64 3b 09 2f 2a 20 63 | 68 61 72 61 63 74 65 72 |ed;./* c|haracter|
|000028c0| 20 75 73 65 64 20 66 6f | 72 20 6d 61 6e 64 61 74 | used fo|r mandat|
|000028d0| 6f 72 79 20 61 72 67 75 | 6d 65 6e 74 73 20 2a 2f |ory argu|ments */|
|000028e0| 0a 65 78 74 65 72 6e 20 | 69 6e 74 20 6f 70 74 6d |.extern |int optm|
|000028f0| 61 79 62 65 3b 09 2f 2a | 20 63 68 61 72 61 63 74 |aybe;./*| charact|
|00002900| 65 72 20 75 73 65 64 20 | 66 6f 72 20 6f 70 74 69 |er used |for opti|
|00002910| 6f 6e 61 6c 20 61 72 67 | 75 6d 65 6e 74 73 20 2a |onal arg|uments *|
|00002920| 2f 0a 65 78 74 65 72 6e | 20 69 6e 74 20 6f 70 74 |/.extern| int opt|
|00002930| 63 68 61 72 3b 09 2f 2a | 20 63 68 61 72 61 63 74 |char;./*| charact|
|00002940| 65 72 20 77 68 69 63 68 | 20 62 65 67 69 6e 73 20 |er which| begins |
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|00002970| 70 74 62 61 64 3b 09 2f | 2a 20 77 68 61 74 20 65 |ptbad;./|* what e|
|00002980| 67 65 74 6f 70 74 28 29 | 20 72 65 74 75 72 6e 73 |getopt()| returns|
|00002990| 20 66 6f 72 20 61 20 62 | 61 64 20 6f 70 74 69 6f | for a b|ad optio|
|000029a0| 6e 20 2a 2f 0a 65 78 74 | 65 72 6e 20 69 6e 74 20 |n */.ext|ern int |
|000029b0| 6f 70 74 65 72 72 66 64 | 3b 09 2f 2a 20 77 68 65 |opterrfd|;./* whe|
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|000029d0| 6f 72 20 6d 65 73 73 61 | 67 65 73 20 67 6f 20 2a |or messa|ges go *|
|000029e0| 2f 0a 65 78 74 65 72 6e | 20 63 68 61 72 20 2a 6f |/.extern| char *o|
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|00002a00| 6e 67 20 77 68 69 63 68 | 20 63 6f 6e 74 61 69 6e |ng which| contain|
|00002a10| 73 20 76 61 6c 69 64 20 | 6f 70 74 69 6f 6e 20 73 |s valid |option s|
|00002a20| 74 61 72 74 20 63 68 61 | 72 73 20 2a 2f 0a 0a 2f |tart cha|rs */../|
|00002a30| 2a 0a 20 2a 20 47 6c 6f | 62 61 6c 20 76 61 72 69 |*. * Glo|bal vari|
|00002a40| 61 62 6c 65 73 20 77 68 | 69 63 68 20 65 78 69 73 |ables wh|ich exis|
|00002a50| 74 20 69 6e 20 67 65 74 | 6f 70 74 28 29 20 61 6e |t in get|opt() an|
|00002a60| 64 20 65 67 65 74 6f 70 | 74 28 29 3a 0a 20 2a 2f |d egetop|t():. */|
|00002a70| 0a 65 78 74 65 72 6e 20 | 69 6e 74 20 6f 70 74 69 |.extern |int opti|
|00002a80| 6e 64 3b 09 2f 2a 20 69 | 6e 64 65 78 20 6f 66 20 |nd;./* i|ndex of |
|00002a90| 63 75 72 72 65 6e 74 20 | 61 72 67 76 5b 5d 20 2a |current |argv[] *|
|00002aa0| 2f 0a 65 78 74 65 72 6e | 20 69 6e 74 20 6f 70 74 |/.extern| int opt|
|00002ab0| 6f 70 74 3b 09 2f 2a 20 | 74 68 65 20 61 63 74 75 |opt;./* |the actu|
|00002ac0| 61 6c 20 6f 70 74 69 6f | 6e 20 70 6f 69 6e 74 65 |al optio|n pointe|
|00002ad0| 64 20 74 6f 20 2a 2f 0a | 65 78 74 65 72 6e 20 69 |d to */.|extern i|
|00002ae0| 6e 74 20 6f 70 74 65 72 | 72 3b 09 2f 2a 20 73 65 |nt opter|r;./* se|
|00002af0| 74 20 74 6f 20 30 20 74 | 6f 20 73 75 70 70 72 65 |t to 0 t|o suppre|
|00002b00| 73 73 20 65 67 65 74 6f | 70 74 27 73 20 65 72 72 |ss egeto|pt's err|
|00002b10| 6f 72 20 6d 65 73 73 61 | 67 65 73 20 2a 2f 0a 65 |or messa|ges */.e|
|00002b20| 78 74 65 72 6e 20 63 68 | 61 72 20 2a 6f 70 74 61 |xtern ch|ar *opta|
|00002b30| 72 67 3b 09 2f 2a 20 74 | 68 65 20 61 72 67 75 6d |rg;./* t|he argum|
|00002b40| 65 6e 74 20 6f 66 20 74 | 68 65 20 6f 70 74 69 6f |ent of t|he optio|
|00002b50| 6e 20 2a 2f 0a 0a 6d 61 | 69 6e 28 61 72 67 63 2c |n */..ma|in(argc,|
|00002b60| 20 61 72 67 76 29 0a 69 | 6e 74 20 61 72 67 63 3b | argv).i|nt argc;|
|00002b70| 0a 63 68 61 72 20 2a 2a | 61 72 67 76 3b 0a 7b 0a |.char **|argv;.{.|
|00002b80| 09 69 6e 74 20 63 68 3b | 0a 0a 09 6f 70 74 65 72 |.int ch;|...opter|
|00002b90| 72 66 64 20 3d 20 66 69 | 6c 65 6e 6f 28 73 74 64 |rfd = fi|leno(std|
|00002ba0| 6f 75 74 29 3b 09 2f 2a | 20 65 72 72 6f 72 73 20 |out);./*| errors |
|00002bb0| 74 6f 20 73 74 64 6f 75 | 74 20 2a 2f 0a 09 6f 70 |to stdou|t */..op|
|00002bc0| 74 65 72 72 20 3d 20 30 | 3b 09 09 2f 2a 20 73 65 |terr = 0|;../* se|
|00002bd0| 74 20 74 68 69 73 20 74 | 6f 20 31 20 74 6f 20 67 |t this t|o 1 to g|
|00002be0| 65 74 20 65 67 65 74 6f | 70 74 27 73 20 65 72 72 |et egeto|pt's err|
|00002bf0| 6f 72 20 6d 73 67 73 20 | 2a 2f 0a 09 6f 70 74 62 |or msgs |*/..optb|
|00002c00| 61 64 20 3d 20 27 21 27 | 3b 09 09 2f 2a 20 72 65 |ad = '!'|;../* re|
|00002c10| 74 75 72 6e 20 27 21 27 | 20 69 6e 73 74 65 61 64 |turn '!'| instead|
|00002c20| 20 6f 66 20 27 3f 27 20 | 6f 6e 20 65 72 72 6f 72 | of '?' |on error|
|00002c30| 20 2a 2f 0a 09 6f 70 74 | 6e 65 65 64 20 3d 20 27 | */..opt|need = '|
|00002c40| 7e 27 3b 09 09 2f 2a 20 | 6d 61 6e 64 61 74 6f 72 |~';../* |mandator|
|00002c50| 79 20 61 72 67 20 69 64 | 65 6e 74 69 66 69 65 72 |y arg id|entifier|
|00002c60| 20 28 69 6e 20 4f 50 54 | 5f 53 54 52 49 4e 47 29 | (in OPT|_STRING)|
|00002c70| 20 2a 2f 0a 09 6f 70 74 | 6d 61 79 62 65 20 3d 20 | */..opt|maybe = |
|00002c80| 27 3f 27 3b 09 09 2f 2a | 20 6f 70 74 69 6f 6e 61 |'?';../*| optiona|
|00002c90| 6c 20 61 72 67 20 69 64 | 65 6e 74 69 66 69 65 72 |l arg id|entifier|
|00002ca0| 20 28 69 6e 20 4f 50 54 | 5f 53 54 52 49 4e 47 29 | (in OPT|_STRING)|
|00002cb0| 20 2a 2f 0a 09 6f 70 74 | 73 74 61 72 74 20 3d 20 | */..opt|start = |
|00002cc0| 4f 50 54 5f 43 48 41 52 | 53 3b 09 2f 2a 20 63 68 |OPT_CHAR|S;./* ch|
|00002cd0| 61 72 61 63 74 65 72 73 | 20 74 68 61 74 20 63 61 |aracters| that ca|
|00002ce0| 6e 20 73 74 61 72 74 20 | 6f 70 74 69 6f 6e 73 20 |n start |options |
|00002cf0| 2a 2f 0a 0a 09 77 68 69 | 6c 65 20 28 28 63 68 20 |*/...whi|le ((ch |
|00002d00| 3d 20 65 67 65 74 6f 70 | 74 28 61 72 67 63 2c 20 |= egetop|t(argc, |
|00002d10| 61 72 67 76 2c 20 4f 50 | 54 5f 53 54 52 49 4e 47 |argv, OP|T_STRING|
|00002d20| 29 29 20 21 3d 20 45 4f | 46 29 20 7b 0a 09 09 70 |)) != EO|F) {...p|
|00002d30| 72 69 6e 74 66 28 22 5c | 6e 5c 74 6f 70 74 69 6f |rintf("\|n\toptio|
|00002d40| 6e 20 69 6e 64 65 78 20 | 28 6f 70 74 69 6e 64 29 |n index |(optind)|
|00002d50| 20 61 66 74 65 72 20 65 | 67 65 74 6f 70 74 28 29 | after e|getopt()|
|00002d60| 3a 20 25 35 64 5c 6e 22 | 2c 0a 09 09 09 6f 70 74 |: %5d\n"|,....opt|
|00002d70| 69 6e 64 29 3b 0a 09 09 | 70 72 69 6e 74 66 28 22 |ind);...|printf("|
|00002d80| 5c 74 5c 74 65 67 65 74 | 6f 70 74 28 29 20 72 65 |\t\teget|opt() re|
|00002d90| 74 75 72 6e 20 76 61 6c | 75 65 3a 20 20 20 20 20 |turn val|ue:     |
|00002da0| 20 20 20 20 20 20 20 25 | 63 20 28 25 64 29 5c 6e |       %|c (%d)\n|
|00002db0| 22 2c 0a 09 09 09 63 68 | 2c 20 63 68 29 3b 0a 09 |",....ch|, ch);..|
|00002dc0| 09 70 72 69 6e 74 66 28 | 22 5c 74 5c 74 63 68 61 |.printf(|"\t\tcha|
|00002dd0| 72 20 74 68 61 74 20 62 | 65 67 69 6e 73 20 6f 70 |r that b|egins op|
|00002de0| 74 69 6f 6e 20 28 6f 70 | 74 63 68 61 72 29 3a 20 |tion (op|tchar): |
|00002df0| 25 63 5c 6e 22 2c 0a 09 | 09 09 6f 70 74 63 68 61 |%c\n",..|..optcha|
|00002e00| 72 29 3b 0a 09 09 70 72 | 69 6e 74 66 28 22 5c 74 |r);...pr|intf("\t|
|00002e10| 5c 74 61 63 74 75 61 6c | 20 63 68 61 72 20 6c 6f |\tactual| char lo|
|00002e20| 6f 6b 65 64 20 61 74 20 | 28 6f 70 74 6f 70 74 29 |oked at |(optopt)|
|00002e30| 3a 20 20 20 20 25 63 5c | 6e 22 2c 0a 09 09 09 6f |:    %c\|n",....o|
|00002e40| 70 74 6f 70 74 29 3b 0a | 09 09 70 72 69 6e 74 66 |ptopt);.|..printf|
|00002e50| 28 22 5c 74 5c 74 6f 70 | 74 69 6f 6e 20 61 72 67 |("\t\top|tion arg|
|00002e60| 75 6d 65 6e 74 3a 20 20 | 20 20 20 20 20 20 20 20 |ument:  |        |
|00002e70| 20 20 20 20 20 20 20 20 | 20 5c 22 25 73 5c 22 5c |        | \"%s\"\|
|00002e80| 6e 22 2c 0a 09 09 09 6f | 70 74 61 72 67 20 3d 3d |n",....o|ptarg ==|
|00002e90| 20 4e 55 4c 4c 20 3f 20 | 22 28 6e 75 6c 6c 29 22 | NULL ? |"(null)"|
|00002ea0| 20 3a 20 6f 70 74 61 72 | 67 29 3b 0a 09 7d 0a 0a | : optar|g);..}..|
|00002eb0| 09 66 6f 72 20 28 3b 20 | 6f 70 74 69 6e 64 20 3c |.for (; |optind <|
|00002ec0| 20 61 72 67 63 3b 20 2b | 2b 6f 70 74 69 6e 64 29 | argc; +|+optind)|
|00002ed0| 20 7b 0a 09 09 70 72 69 | 6e 74 66 28 22 5c 6e 5c | {...pri|ntf("\n\|
|00002ee0| 74 61 72 67 75 6d 65 6e | 74 20 69 6e 64 65 78 20 |targumen|t index |
|00002ef0| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |        |        |
|00002f00| 20 20 20 20 20 20 20 20 | 25 35 64 5c 6e 22 2c 0a |        |%5d\n",.|
|00002f10| 09 09 09 6f 70 74 69 6e | 64 29 3b 0a 09 09 70 72 |...optin|d);...pr|
|00002f20| 69 6e 74 66 28 22 5c 74 | 5c 74 61 72 67 75 6d 65 |intf("\t|\targume|
|00002f30| 6e 74 3a 20 20 20 20 20 | 20 20 20 20 20 20 20 20 |nt:     |        |
|00002f40| 20 20 20 20 20 20 20 20 | 20 20 20 20 20 5c 22 25 |        |     \"%|
|00002f50| 73 5c 22 5c 6e 22 2c 0a | 09 09 09 61 72 67 76 5b |s\"\n",.|...argv[|
|00002f60| 6f 70 74 69 6e 64 5d 20 | 3d 3d 20 4e 55 4c 4c 20 |optind] |== NULL |
|00002f70| 3f 20 22 28 6e 75 6c 6c | 29 22 20 3a 20 61 72 67 |? "(null|)" : arg|
|00002f80| 76 5b 6f 70 74 69 6e 64 | 5d 29 3b 0a 09 7d 0a 0a |v[optind|]);..}..|
|00002f90| 09 65 78 69 74 28 30 29 | 3b 0a 7d 0a 63 74 65 72 |.exit(0)|;.}.cter|
|00002fa0| 20 74 68 61 74 20 62 65 | 67 69 6e 73 20 61 20 67 | that be|gins a g|
|00002fb0| 69 76 65 6e 20 6f 70 74 | 69 6f 6e 2c 20 6f 72 20 |iven opt|ion, or |
|00002fc0| 30 20 69 66 0a 09 74 68 | 65 72 65 20 77 61 73 20 |0 if..th|ere was |
|00002fd0| 61 6e 20 65 72 72 6f 72 | 2e 20 20 4a 75 73 74 20 |an error|.  Just |
|00002fe0| 70 75 74 20 74 68 65 20 | 66 6f 6c 6c 6f 77 69 6e |put the |followin|
|00002ff0| 67 20 6c 69 6e 65 20 69 | 6e 20 79 6f 75 72 20 63 |g line i|n your c|
|00003000| 65 67 65 74 6f 70 74 2f | 65 67 65 74 6f 70 74 2e |egetopt/|egetopt.|
|00003010| 63 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |c.......|........|
|00003020| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003030| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003040| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003050| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003060| 00 00 00 00 20 20 20 36 | 34 34 20 00 20 20 20 32 |....   6|44 .   2|
|00003070| 34 33 20 00 20 20 20 20 | 31 32 20 00 20 20 20 20 |43 .    |12 .    |
|00003080| 20 20 31 35 32 35 35 20 | 20 34 34 30 33 36 30 33 |  15255 | 4403603|
|00003090| 31 37 36 20 20 20 37 34 | 31 36 00 20 00 00 00 00 |176   74|16. ....|
|000030a0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000030b0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000030c0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000030d0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000030e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000030f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003100| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003110| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003120| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003130| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003140| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003150| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003160| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003170| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003180| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003190| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000031a0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000031b0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000031c0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000031d0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000031e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000031f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00003200| 2f 2a 0a 20 2a 20 65 67 | 65 74 6f 70 74 2e 63 20 |/*. * eg|etopt.c |
|00003210| 2d 2d 20 45 78 74 65 6e | 64 65 64 20 27 67 65 74 |-- Exten|ded 'get|
|00003220| 6f 70 74 27 2e 0a 20 2a | 0a 20 2a 20 41 20 77 68 |opt'.. *|. * A wh|
|00003230| 69 6c 65 20 62 61 63 6b | 2c 20 61 20 70 75 62 6c |ile back|, a publ|
|00003240| 69 63 2d 64 6f 6d 61 69 | 6e 20 76 65 72 73 69 6f |ic-domai|n versio|
|00003250| 6e 20 6f 66 20 67 65 74 | 6f 70 74 28 29 20 77 61 |n of get|opt() wa|
|00003260| 73 20 70 6f 73 74 65 64 | 20 74 6f 20 74 68 65 0a |s posted| to the.|
|00003270| 20 2a 20 6e 65 74 2e 20 | 20 41 20 62 69 74 20 6c | * net. | A bit l|
|00003280| 61 74 65 72 2c 20 61 20 | 67 65 6e 74 6c 65 6d 61 |ater, a |gentlema|
|00003290| 6e 20 62 79 20 74 68 65 | 20 6e 61 6d 65 20 6f 66 |n by the| name of|
|000032a0| 20 4b 65 69 74 68 20 42 | 6f 73 74 69 63 20 6d 61 | Keith B|ostic ma|
|000032b0| 64 65 20 73 6f 6d 65 0a | 20 2a 20 65 6e 68 61 6e |de some.| * enhan|
|000032c0| 63 65 6d 65 6e 74 73 20 | 61 6e 64 20 72 65 70 6f |cements |and repo|
|000032d0| 73 74 65 64 20 69 74 2e | 0a 20 2a 0a 20 2a 20 49 |sted it.|. *. * I|
|000032e0| 6e 20 72 65 63 65 6e 74 | 20 77 65 65 6b 73 20 28 |n recent| weeks (|
|000032f0| 69 2e 65 2e 2c 20 65 61 | 72 6c 79 2d 74 6f 2d 6d |i.e., ea|rly-to-m|
|00003300| 69 64 20 31 39 38 38 29 | 20 74 68 65 72 65 27 73 |id 1988)| there's|
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|00003320| 61 74 65 64 20 64 69 73 | 63 75 73 73 69 6f 6e 20 |ated dis|cussion |
|00003330| 69 6e 20 63 6f 6d 70 2e | 6c 61 6e 67 2e 63 20 61 |in comp.|lang.c a|
|00003340| 62 6f 75 74 20 74 68 65 | 20 6d 65 72 69 74 73 20 |bout the| merits |
|00003350| 61 6e 64 20 64 72 61 77 | 62 61 63 6b 73 0a 20 2a |and draw|backs. *|
|00003360| 20 6f 66 20 67 65 74 6f | 70 74 28 29 2c 20 65 73 | of geto|pt(), es|
|00003370| 70 65 63 69 61 6c 6c 79 | 20 77 69 74 68 20 72 65 |pecially| with re|
|00003380| 67 61 72 64 20 74 6f 20 | 69 74 73 20 68 61 6e 64 |gard to |its hand|
|00003390| 6c 69 6e 67 20 6f 66 20 | 27 3f 27 2e 0a 20 2a 0a |ling of |'?'.. *.|
|000033a0| 20 2a 20 49 6e 20 6c 69 | 67 68 74 20 6f 66 20 74 | * In li|ght of t|
|000033b0| 68 69 73 2c 20 49 20 68 | 61 76 65 20 74 61 6b 65 |his, I h|ave take|
|000033c0| 6e 20 4d 72 2e 20 42 6f | 73 74 69 63 27 73 20 70 |n Mr. Bo|stic's p|
|000033d0| 75 62 6c 69 63 2d 64 6f | 6d 61 69 6e 20 67 65 74 |ublic-do|main get|
|000033e0| 6f 70 74 28 29 0a 20 2a | 20 61 6e 64 20 68 61 76 |opt(). *| and hav|
|000033f0| 65 20 6d 61 64 65 20 73 | 6f 6d 65 20 63 68 61 6e |e made s|ome chan|
|00003400| 67 65 73 20 74 68 61 74 | 20 49 20 68 6f 70 65 20 |ges that| I hope |
|00003410| 77 69 6c 6c 20 62 65 20 | 63 6f 6e 73 69 64 65 72 |will be |consider|
|00003420| 65 64 20 74 6f 20 62 65 | 0a 20 2a 20 69 6d 70 72 |ed to be|. * impr|
|00003430| 6f 76 65 6d 65 6e 74 73 | 2e 20 20 49 20 63 61 6c |ovements|.  I cal|
|00003440| 6c 20 74 68 69 73 20 72 | 6f 75 74 69 6e 65 20 27 |l this r|outine '|
|00003450| 65 67 65 74 6f 70 74 27 | 20 28 22 45 78 74 65 6e |egetopt'| ("Exten|
|00003460| 64 65 64 20 67 65 74 6f | 70 74 22 29 2e 0a 20 2a |ded geto|pt").. *|
|00003470| 20 54 68 65 20 64 65 66 | 61 75 6c 74 20 62 65 68 | The def|ault beh|
|00003480| 61 76 69 6f 72 20 6f 66 | 20 74 68 69 73 20 72 6f |avior of| this ro|
|00003490| 75 74 69 6e 65 20 69 73 | 20 74 68 65 20 73 61 6d |utine is| the sam|
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|000034b0| 6f 70 74 28 29 2c 0a 20 | 2a 20 62 75 74 20 69 74 |opt(),. |* but it|
|000034c0| 20 68 61 73 20 73 6f 6d | 65 20 6f 70 74 69 6f 6e | has som|e option|
|000034d0| 61 6c 20 66 65 61 74 75 | 72 65 73 20 74 68 61 74 |al featu|res that|
|000034e0| 20 6d 61 6b 65 20 69 74 | 20 6d 6f 72 65 20 75 73 | make it| more us|
|000034f0| 65 66 75 6c 2e 20 20 54 | 68 65 73 65 0a 20 2a 20 |eful.  T|hese. * |
|00003500| 6f 70 74 69 6f 6e 73 20 | 61 72 65 20 63 6f 6e 74 |options |are cont|
|00003510| 72 6f 6c 6c 65 64 20 62 | 79 20 74 68 65 20 73 65 |rolled b|y the se|
|00003520| 74 74 69 6e 67 73 20 6f | 66 20 73 6f 6d 65 20 67 |ttings o|f some g|
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|00003540| 0a 20 2a 20 42 79 20 6e | 6f 74 20 73 65 74 74 69 |. * By n|ot setti|
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|00003560| 65 78 74 72 61 20 67 6c | 6f 62 61 6c 20 76 61 72 |extra gl|obal var|
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|00003590| 65 20 66 75 6e 63 74 69 | 6f 6e 61 6c 69 74 79 20 |e functi|onality |
|000035a0| 61 73 20 67 65 74 6f 70 | 74 28 29 2c 20 77 68 69 |as getop|t(), whi|
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|00003610| 20 49 66 2c 20 6f 6e 20 | 74 68 65 20 6f 74 68 65 | If, on |the othe|
|00003620| 72 20 68 61 6e 64 2c 20 | 79 6f 75 20 61 72 65 20 |r hand, |you are |
|00003630| 73 6f 6d 65 6f 6e 65 20 | 77 68 6f 20 69 73 6e 27 |someone |who isn'|
|00003640| 74 20 73 61 74 69 73 66 | 69 65 64 20 77 69 74 68 |t satisf|ied with|
|00003650| 20 74 68 65 0a 20 2a 20 | 73 74 61 74 75 73 20 71 | the. * |status q|
|00003660| 75 6f 2c 20 65 67 65 74 | 6f 70 74 28 29 20 6d 61 |uo, eget|opt() ma|
|00003670| 79 20 76 65 72 79 20 77 | 65 6c 6c 20 67 69 76 65 |y very w|ell give|
|00003680| 20 79 6f 75 20 74 68 65 | 20 61 64 64 65 64 20 63 | you the| added c|
|00003690| 61 70 61 62 69 6c 69 74 | 69 65 73 0a 20 2a 20 79 |apabilit|ies. * y|
|000036a0| 6f 75 20 77 61 6e 74 2e | 0a 20 2a 0a 20 2a 20 4c |ou want.|. *. * L|
|000036b0| 6f 6f 6b 20 61 74 20 74 | 68 65 20 65 6e 63 6c 6f |ook at t|he enclo|
|000036c0| 73 65 64 20 52 45 41 44 | 4d 45 20 66 69 6c 65 20 |sed READ|ME file |
|000036d0| 66 6f 72 20 61 20 64 65 | 73 63 72 69 70 74 69 6f |for a de|scriptio|
|000036e0| 6e 20 6f 66 20 65 67 65 | 74 6f 70 74 28 29 27 73 |n of ege|topt()'s|
|000036f0| 0a 20 2a 20 6e 65 77 20 | 66 65 61 74 75 72 65 73 |. * new |features|
|00003700| 2e 0a 20 2a 0a 20 2a 20 | 54 68 65 20 63 6f 64 65 |.. *. * |The code|
|00003710| 20 77 61 73 20 6f 72 69 | 67 69 6e 61 6c 6c 79 20 | was ori|ginally |
|00003720| 70 6f 73 74 65 64 20 74 | 6f 20 74 68 65 20 6e 65 |posted t|o the ne|
|00003730| 74 20 61 73 20 67 65 74 | 6f 70 74 2e 63 20 62 79 |t as get|opt.c by|
|00003740| 20 2e 2e 2e 0a 20 2a 0a | 20 2a 09 4b 65 69 74 68 | .... *.| *.Keith|
|00003750| 20 42 6f 73 74 69 63 0a | 20 2a 09 41 52 50 41 3a | Bostic.| *.ARPA:|
|00003760| 20 6b 65 69 74 68 40 73 | 65 69 73 6d 6f 20 0a 20 | keith@s|eismo . |
|00003770| 2a 09 55 55 43 50 3a 20 | 73 65 69 73 6d 6f 21 6b |*.UUCP: |seismo!k|
|00003780| 65 69 74 68 0a 20 2a 0a | 20 2a 20 43 75 72 72 65 |eith. *.| * Curre|
|00003790| 6e 74 20 76 65 72 73 69 | 6f 6e 3a 20 61 64 64 65 |nt versi|on: adde|
|000037a0| 64 20 65 6e 68 61 6e 63 | 65 6d 65 6e 74 73 20 61 |d enhanc|ements a|
|000037b0| 6e 64 20 63 6f 6d 6d 65 | 6e 74 73 2c 20 72 65 66 |nd comme|nts, ref|
|000037c0| 6f 72 6d 61 74 74 65 64 | 20 63 6f 64 65 2e 0a 20 |ormatted| code.. |
|000037d0| 2a 0a 20 2a 09 4c 6c 6f | 79 64 20 5a 75 73 6d 61 |*. *.Llo|yd Zusma|
|000037e0| 6e 0a 20 2a 09 4d 61 73 | 74 65 72 20 42 79 74 65 |n. *.Mas|ter Byte|
|000037f0| 20 53 6f 66 74 77 61 72 | 65 0a 20 2a 09 4c 6f 73 | Softwar|e. *.Los|
|00003800| 20 47 61 74 6f 73 2c 20 | 43 61 6c 69 66 6f 72 6e | Gatos, |Californ|
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|00003830| 43 50 3a 09 09 2e 2e 2e | 21 61 6d 65 73 21 66 78 |CP:.....|!ames!fx|
|00003840| 67 72 70 21 6c 6a 7a 0a | 20 2a 0a 20 2a 20 20 20 |grp!ljz.| *. *   |
|00003850| 20 09 4d 61 79 2c 20 31 | 39 38 38 0a 20 2a 2f 0a | .May, 1|988. */.|
|00003860| 0a 2f 2a 0a 20 2a 20 49 | 66 20 79 6f 75 20 77 61 |./*. * I|f you wa|
|00003870| 6e 74 2c 20 69 6e 63 6c | 75 64 65 20 73 74 64 69 |nt, incl|ude stdi|
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|00003890| 20 77 68 65 72 65 20 45 | 4f 46 20 61 6e 64 20 4e | where E|OF and N|
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|00003930| 0a 23 69 66 6e 64 65 66 | 20 45 4f 46 0a 23 20 64 |.#ifndef| EOF.# d|
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|00003980| 28 63 68 61 72 20 2a 29 | 30 0a 23 65 6e 64 69 66 |(char *)|0.#endif|
|00003990| 20 2f 2a 20 21 20 4e 55 | 4c 4c 20 2a 2f 0a 0a 2f | /* ! NU|LL */../|
|000039a0| 2a 0a 20 2a 20 4e 6f 6e | 65 20 6f 66 20 74 68 65 |*. * Non|e of the|
|000039b0| 73 65 20 63 6f 6e 73 74 | 61 6e 74 73 20 61 72 65 |se const|ants are|
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|000039d0| 68 65 20 65 78 65 63 75 | 74 61 62 6c 65 20 70 6f |he execu|table po|
|000039e0| 72 74 69 6f 6e 20 6f 66 | 0a 20 2a 20 74 68 65 20 |rtion of|. * the |
|000039f0| 63 6f 64 65 20 2e 2e 2e | 20 74 68 65 69 72 20 73 |code ...| their s|
|00003a00| 6f 6c 65 20 70 75 72 70 | 6f 73 65 20 69 73 20 74 |ole purp|ose is t|
|00003a10| 6f 20 69 6e 69 74 69 61 | 6c 69 7a 65 20 67 6c 6f |o initia|lize glo|
|00003a20| 62 61 6c 20 76 61 72 69 | 61 62 6c 65 73 2e 0a 20 |bal vari|ables.. |
|00003a30| 2a 2f 0a 23 64 65 66 69 | 6e 65 20 42 41 44 43 48 |*/.#defi|ne BADCH|
|00003a40| 09 09 28 69 6e 74 29 27 | 3f 27 0a 23 64 65 66 69 |..(int)'|?'.#defi|
|00003a50| 6e 65 20 4e 45 45 44 53 | 45 50 09 09 28 69 6e 74 |ne NEEDS|EP..(int|
|00003a60| 29 27 3a 27 0a 23 64 65 | 66 69 6e 65 20 4d 41 59 |)':'.#de|fine MAY|
|00003a70| 42 45 53 45 50 09 28 69 | 6e 74 29 27 5c 30 27 0a |BESEP.(i|nt)'\0'.|
|00003a80| 23 64 65 66 69 6e 65 20 | 45 52 52 46 44 09 09 32 |#define |ERRFD..2|
|00003a90| 0a 23 64 65 66 69 6e 65 | 20 45 4d 53 47 09 09 22 |.#define| EMSG.."|
|00003aa0| 22 0a 23 64 65 66 69 6e | 65 20 53 54 41 52 54 09 |".#defin|e START.|
|00003ab0| 09 22 2d 22 0a 0a 2f 2a | 0a 20 2a 20 48 65 72 65 |."-"../*|. * Here|
|00003ac0| 20 61 72 65 20 61 6c 6c | 20 74 68 65 20 70 65 72 | are all| the per|
|00003ad0| 74 69 6e 65 6e 74 20 67 | 6c 6f 62 61 6c 20 76 61 |tinent g|lobal va|
|00003ae0| 72 69 61 62 6c 65 73 2e | 0a 20 2a 2f 0a 69 6e 74 |riables.|. */.int|
|00003af0| 20 6f 70 74 65 72 72 20 | 3d 20 31 3b 09 09 2f 2a | opterr |= 1;../*|
|00003b00| 20 69 66 20 74 72 75 65 | 2c 20 6f 75 74 70 75 74 | if true|, output|
|00003b10| 20 65 72 72 6f 72 20 6d | 65 73 73 61 67 65 20 2a | error m|essage *|
|00003b20| 2f 0a 69 6e 74 20 6f 70 | 74 69 6e 64 20 3d 20 31 |/.int op|tind = 1|
|00003b30| 3b 09 09 2f 2a 20 69 6e | 64 65 78 20 69 6e 74 6f |;../* in|dex into|
|00003b40| 20 70 61 72 65 6e 74 20 | 61 72 67 76 20 76 65 63 | parent |argv vec|
|00003b50| 74 6f 72 20 2a 2f 0a 69 | 6e 74 20 6f 70 74 6f 70 |tor */.i|nt optop|
|00003b60| 74 3b 09 09 2f 2a 20 63 | 68 61 72 61 63 74 65 72 |t;../* c|haracter|
|00003b70| 20 63 68 65 63 6b 65 64 | 20 66 6f 72 20 76 61 6c | checked| for val|
|00003b80| 69 64 69 74 79 20 2a 2f | 0a 69 6e 74 20 6f 70 74 |idity */|.int opt|
|00003b90| 62 61 64 20 3d 20 42 41 | 44 43 48 3b 09 2f 2a 20 |bad = BA|DCH;./* |
|00003ba0| 63 68 61 72 61 63 74 65 | 72 20 72 65 74 75 72 6e |characte|r return|
|00003bb0| 65 64 20 6f 6e 20 65 72 | 72 6f 72 20 2a 2f 0a 69 |ed on er|ror */.i|
|00003bc0| 6e 74 20 6f 70 74 63 68 | 61 72 20 3d 20 30 3b 09 |nt optch|ar = 0;.|
|00003bd0| 2f 2a 20 63 68 61 72 61 | 63 74 65 72 20 74 68 61 |/* chara|cter tha|
|00003be0| 74 20 62 65 67 69 6e 73 | 20 72 65 74 75 72 6e 65 |t begins| returne|
|00003bf0| 64 20 6f 70 74 69 6f 6e | 20 2a 2f 0a 69 6e 74 20 |d option| */.int |
|00003c00| 6f 70 74 6e 65 65 64 20 | 3d 20 4e 45 45 44 53 45 |optneed |= NEEDSE|
|00003c10| 50 3b 09 2f 2a 20 66 6c | 61 67 20 66 6f 72 20 6d |P;./* fl|ag for m|
|00003c20| 61 6e 64 61 74 6f 72 79 | 20 61 72 67 75 6d 65 6e |andatory| argumen|
|00003c30| 74 20 2a 2f 0a 69 6e 74 | 20 6f 70 74 6d 61 79 62 |t */.int| optmayb|
|00003c40| 65 20 3d 20 4d 41 59 42 | 45 53 45 50 3b 2f 2a 20 |e = MAYB|ESEP;/* |
|00003c50| 66 6c 61 67 20 66 6f 72 | 20 6f 70 74 69 6f 6e 61 |flag for| optiona|
|00003c60| 6c 20 61 72 67 75 6d 65 | 6e 74 20 2a 2f 0a 69 6e |l argume|nt */.in|
|00003c70| 74 20 6f 70 74 65 72 72 | 66 64 20 3d 20 45 52 52 |t opterr|fd = ERR|
|00003c80| 46 44 3b 09 2f 2a 20 66 | 69 6c 65 20 64 65 73 63 |FD;./* f|ile desc|
|00003c90| 72 69 70 74 6f 72 20 66 | 6f 72 20 65 72 72 6f 72 |riptor f|or error|
|00003ca0| 20 74 65 78 74 20 2a 2f | 0a 63 68 61 72 20 2a 6f | text */|.char *o|
|00003cb0| 70 74 61 72 67 3b 09 09 | 2f 2a 20 61 72 67 75 6d |ptarg;..|/* argum|
|00003cc0| 65 6e 74 20 61 73 73 6f | 63 69 61 74 65 64 20 77 |ent asso|ciated w|
|00003cd0| 69 74 68 20 6f 70 74 69 | 6f 6e 20 2a 2f 0a 63 68 |ith opti|on */.ch|
|00003ce0| 61 72 20 2a 6f 70 74 73 | 74 61 72 74 20 3d 20 53 |ar *opts|tart = S|
|00003cf0| 54 41 52 54 3b 09 2f 2a | 20 6c 69 73 74 20 6f 66 |TART;./*| list of|
|00003d00| 20 63 68 61 72 61 63 74 | 65 72 73 20 74 68 61 74 | charact|ers that|
|00003d10| 20 73 74 61 72 74 20 6f | 70 74 69 6f 6e 73 20 2a | start o|ptions *|
|00003d20| 2f 0a 0a 0a 2f 2a 0a 20 | 2a 20 4d 61 63 72 6f 73 |/.../*. |* Macros|
|00003d30| 2e 0a 20 2a 2f 0a 0a 2f | 2a 0a 20 2a 20 43 6f 6e |.. */../|*. * Con|
|00003d40| 64 69 74 69 6f 6e 61 6c | 6c 79 20 70 72 69 6e 74 |ditional|ly print|
|00003d50| 20 6f 75 74 20 61 6e 20 | 65 72 72 6f 72 20 6d 65 | out an |error me|
|00003d60| 73 73 61 67 65 20 61 6e | 64 20 72 65 74 75 72 6e |ssage an|d return|
|00003d70| 20 28 64 65 70 65 6e 64 | 73 20 6f 6e 20 74 68 65 | (depend|s on the|
|00003d80| 0a 20 2a 20 73 65 74 74 | 69 6e 67 20 6f 66 20 27 |. * sett|ing of '|
|00003d90| 6f 70 74 65 72 72 27 20 | 61 6e 64 20 27 6f 70 74 |opterr' |and 'opt|
|00003da0| 65 72 72 66 64 27 29 2e | 20 20 4e 6f 74 65 20 74 |errfd').|  Note t|
|00003db0| 68 61 74 20 74 68 69 73 | 20 76 65 72 73 69 6f 6e |hat this| version|
|00003dc0| 20 6f 66 0a 20 2a 20 54 | 45 4c 4c 28 29 20 64 6f | of. * T|ELL() do|
|00003dd0| 65 73 6e 27 74 20 72 65 | 71 75 69 72 65 20 74 68 |esn't re|quire th|
|00003de0| 65 20 65 78 69 73 74 65 | 6e 63 65 20 6f 66 20 73 |e existe|nce of s|
|00003df0| 74 64 69 6f 2e 68 2e 0a | 20 2a 2f 0a 23 64 65 66 |tdio.h..| */.#def|
|00003e00| 69 6e 65 20 54 45 4c 4c | 28 53 29 09 7b 20 5c 0a |ine TELL|(S).{ \.|
|00003e10| 09 69 66 20 28 6f 70 74 | 65 72 72 20 26 26 20 6f |.if (opt|err && o|
|00003e20| 70 74 65 72 72 66 64 20 | 3e 3d 20 30 29 20 7b 20 |pterrfd |>= 0) { |
|00003e30| 5c 0a 09 09 63 68 61 72 | 20 6f 70 74 69 6f 6e 20 |\...char| option |
|00003e40| 3d 20 6f 70 74 6f 70 74 | 3b 20 5c 0a 09 09 77 72 |= optopt|; \...wr|
|00003e50| 69 74 65 28 6f 70 74 65 | 72 72 66 64 2c 20 2a 6e |ite(opte|rrfd, *n|
|00003e60| 61 72 67 76 2c 20 73 74 | 72 6c 65 6e 28 2a 6e 61 |argv, st|rlen(*na|
|00003e70| 72 67 76 29 29 3b 20 5c | 0a 09 09 77 72 69 74 65 |rgv)); \|...write|
|00003e80| 28 6f 70 74 65 72 72 66 | 64 2c 20 28 53 29 2c 20 |(opterrf|d, (S), |
|00003e90| 73 74 72 6c 65 6e 28 53 | 29 29 3b 20 5c 0a 09 09 |strlen(S|)); \...|
|00003ea0| 77 72 69 74 65 28 6f 70 | 74 65 72 72 66 64 2c 20 |write(op|terrfd, |
|00003eb0| 26 6f 70 74 69 6f 6e 2c | 20 31 29 3b 20 5c 0a 09 |&option,| 1); \..|
|00003ec0| 09 77 72 69 74 65 28 6f | 70 74 65 72 72 66 64 2c |.write(o|pterrfd,|
|00003ed0| 20 22 5c 6e 22 2c 20 31 | 29 3b 20 5c 0a 09 7d 20 | "\n", 1|); \..} |
|00003ee0| 5c 0a 09 72 65 74 75 72 | 6e 20 28 6f 70 74 62 61 |\..retur|n (optba|
|00003ef0| 64 29 3b 20 5c 0a 7d 0a | 0a 2f 2a 0a 20 2a 20 54 |d); \.}.|./*. * T|
|00003f00| 68 69 73 20 77 6f 72 6b | 73 20 73 69 6d 69 6c 61 |his work|s simila|
|00003f10| 72 6c 79 20 74 6f 20 69 | 6e 64 65 78 28 29 20 61 |rly to i|ndex() a|
|00003f20| 6e 64 20 73 74 72 63 68 | 72 28 29 2e 20 20 49 20 |nd strch|r().  I |
|00003f30| 69 6e 63 6c 75 64 65 20 | 69 74 20 73 6f 20 74 68 |include |it so th|
|00003f40| 61 74 20 79 6f 75 0a 20 | 2a 20 64 6f 6e 27 74 20 |at you. |* don't |
|00003f50| 6e 65 65 64 20 74 6f 20 | 62 65 20 63 6f 6e 63 65 |need to |be conce|
|00003f60| 72 6e 65 64 20 61 73 20 | 74 6f 20 77 68 69 63 68 |rned as |to which|
|00003f70| 20 6f 6e 65 20 79 6f 75 | 72 20 73 79 73 74 65 6d | one you|r system|
|00003f80| 20 68 61 73 2e 0a 20 2a | 2f 0a 73 74 61 74 69 63 | has.. *|/.static|
|00003f90| 20 63 68 61 72 20 2a 0a | 5f 73 69 6e 64 65 78 28 | char *.|_sindex(|
|00003fa0| 73 74 72 69 6e 67 2c 20 | 63 68 29 0a 63 68 61 72 |string, |ch).char|
|00003fb0| 20 2a 73 74 72 69 6e 67 | 3b 0a 69 6e 74 20 63 68 | *string|;.int ch|
|00003fc0| 3b 0a 7b 0a 09 69 66 20 | 28 73 74 72 69 6e 67 20 |;.{..if |(string |
|00003fd0| 21 3d 20 4e 55 4c 4c 29 | 20 7b 0a 09 09 66 6f 72 |!= NULL)| {...for|
|00003fe0| 20 28 3b 20 2a 73 74 72 | 69 6e 67 20 21 3d 20 27 | (; *str|ing != '|
|00003ff0| 5c 30 27 3b 20 2b 2b 73 | 74 72 69 6e 67 29 20 7b |\0'; ++s|tring) {|
|00004000| 0a 09 09 09 69 66 20 28 | 2a 73 74 72 69 6e 67 20 |....if (|*string |
|00004010| 3d 3d 20 28 63 68 61 72 | 29 63 68 29 20 7b 0a 09 |== (char|)ch) {..|
|00004020| 09 09 09 72 65 74 75 72 | 6e 20 28 73 74 72 69 6e |...retur|n (strin|
|00004030| 67 29 3b 0a 09 09 09 7d | 0a 09 09 7d 0a 09 7d 0a |g);....}|...}..}.|
|00004040| 0a 09 72 65 74 75 72 6e | 20 28 4e 55 4c 4c 29 3b |..return| (NULL);|
|00004050| 0a 7d 0a 0a 2f 2a 0a 20 | 2a 20 48 65 72 65 20 69 |.}../*. |* Here i|
|00004060| 74 20 69 73 3a 0a 20 2a | 2f 0a 69 6e 74 0a 65 67 |t is:. *|/.int.eg|
|00004070| 65 74 6f 70 74 28 6e 61 | 72 67 63 2c 20 6e 61 72 |etopt(na|rgc, nar|
|00004080| 67 76 2c 20 6f 73 74 72 | 29 0a 69 6e 74 20 6e 61 |gv, ostr|).int na|
|00004090| 72 67 63 3b 0a 63 68 61 | 72 20 2a 2a 6e 61 72 67 |rgc;.cha|r **narg|
|000040a0| 76 3b 0a 63 68 61 72 20 | 2a 6f 73 74 72 3b 0a 7b |v;.char |*ostr;.{|
|000040b0| 0a 09 73 74 61 74 69 63 | 20 63 68 61 72 20 2a 70 |..static| char *p|
|000040c0| 6c 61 63 65 20 3d 20 45 | 4d 53 47 3b 09 2f 2a 20 |lace = E|MSG;./* |
|000040d0| 6f 70 74 69 6f 6e 20 6c | 65 74 74 65 72 20 70 72 |option l|etter pr|
|000040e0| 6f 63 65 73 73 69 6e 67 | 20 2a 2f 0a 09 72 65 67 |ocessing| */..reg|
|000040f0| 69 73 74 65 72 20 63 68 | 61 72 20 2a 6f 6c 69 3b |ister ch|ar *oli;|
|00004100| 09 09 2f 2a 20 6f 70 74 | 69 6f 6e 20 6c 65 74 74 |../* opt|ion lett|
|00004110| 65 72 20 6c 69 73 74 20 | 69 6e 64 65 78 20 2a 2f |er list |index */|
|00004120| 0a 09 72 65 67 69 73 74 | 65 72 20 63 68 61 72 20 |..regist|er char |
|00004130| 2a 6f 73 69 20 3d 20 4e | 55 4c 4c 3b 09 2f 2a 20 |*osi = N|ULL;./* |
|00004140| 6f 70 74 69 6f 6e 20 73 | 74 61 72 74 20 6c 69 73 |option s|tart lis|
|00004150| 74 20 69 6e 64 65 78 20 | 2a 2f 0a 0a 09 69 66 20 |t index |*/...if |
|00004160| 28 6e 61 72 67 76 20 3d | 3d 20 28 63 68 61 72 20 |(nargv =|= (char |
|00004170| 2a 2a 29 4e 55 4c 4c 29 | 20 7b 0a 09 09 72 65 74 |**)NULL)| {...ret|
|00004180| 75 72 6e 20 28 45 4f 46 | 29 3b 0a 09 7d 0a 0a 09 |urn (EOF|);..}...|
|00004190| 69 66 20 28 6e 61 72 67 | 63 20 3c 3d 20 6f 70 74 |if (narg|c <= opt|
|000041a0| 69 6e 64 20 7c 7c 20 6e | 61 72 67 76 5b 6f 70 74 |ind || n|argv[opt|
|000041b0| 69 6e 64 5d 20 3d 3d 20 | 4e 55 4c 4c 29 20 7b 0a |ind] == |NULL) {.|
|000041c0| 09 09 72 65 74 75 72 6e | 20 28 45 4f 46 29 3b 0a |..return| (EOF);.|
|000041d0| 09 7d 0a 0a 09 69 66 20 | 28 70 6c 61 63 65 20 3d |.}...if |(place =|
|000041e0| 3d 20 4e 55 4c 4c 29 20 | 7b 0a 09 09 70 6c 61 63 |= NULL) |{...plac|
|000041f0| 65 20 3d 20 45 4d 53 47 | 3b 0a 09 7d 0a 0a 09 2f |e = EMSG|;..}.../|
|00004200| 2a 0a 09 20 2a 20 55 70 | 64 61 74 65 20 73 63 61 |*.. * Up|date sca|
|00004210| 6e 6e 69 6e 67 20 70 6f | 69 6e 74 65 72 2e 0a 09 |nning po|inter...|
|00004220| 20 2a 2f 0a 09 69 66 20 | 28 2a 70 6c 61 63 65 20 | */..if |(*place |
|00004230| 3d 3d 20 27 5c 30 27 29 | 20 7b 0a 09 09 70 6c 61 |== '\0')| {...pla|
|00004240| 63 65 20 3d 20 6e 61 72 | 67 76 5b 6f 70 74 69 6e |ce = nar|gv[optin|
|00004250| 64 5d 3b 0a 09 09 69 66 | 20 28 70 6c 61 63 65 20 |d];...if| (place |
|00004260| 3d 3d 20 4e 55 4c 4c 29 | 20 7b 0a 09 09 09 72 65 |== NULL)| {....re|
|00004270| 74 75 72 6e 20 28 45 4f | 46 29 3b 0a 09 09 7d 0a |turn (EO|F);...}.|
|00004280| 09 09 6f 73 69 20 3d 20 | 5f 73 69 6e 64 65 78 28 |..osi = |_sindex(|
|00004290| 6f 70 74 73 74 61 72 74 | 2c 20 2a 70 6c 61 63 65 |optstart|, *place|
|000042a0| 29 3b 0a 09 09 69 66 20 | 28 6f 73 69 20 21 3d 20 |);...if |(osi != |
|000042b0| 4e 55 4c 4c 29 20 7b 0a | 09 09 09 6f 70 74 63 68 |NULL) {.|...optch|
|000042c0| 61 72 20 3d 20 28 69 6e | 74 29 2a 6f 73 69 3b 0a |ar = (in|t)*osi;.|
|000042d0| 09 09 7d 0a 09 09 69 66 | 20 28 6f 70 74 69 6e 64 |..}...if| (optind|
|000042e0| 20 3e 3d 20 6e 61 72 67 | 63 20 7c 7c 20 6f 73 69 | >= narg|c || osi|
|000042f0| 20 3d 3d 20 4e 55 4c 4c | 20 7c 7c 20 2a 2b 2b 70 | == NULL| || *++p|
|00004300| 6c 61 63 65 20 3d 3d 20 | 27 5c 30 27 29 20 7b 0a |lace == |'\0') {.|
|00004310| 09 09 20 20 20 20 09 72 | 65 74 75 72 6e 20 28 45 |..    .r|eturn (E|
|00004320| 4f 46 29 3b 0a 09 09 7d | 0a 0a 09 09 2f 2a 0a 09 |OF);...}|..../*..|
|00004330| 09 20 2a 20 54 77 6f 20 | 61 64 6a 61 63 65 6e 74 |. * Two |adjacent|
|00004340| 2c 20 69 64 65 6e 74 69 | 63 61 6c 20 66 6c 61 67 |, identi|cal flag|
|00004350| 20 63 68 61 72 61 63 74 | 65 72 73 20 77 65 72 65 | charact|ers were|
|00004360| 20 66 6f 75 6e 64 2e 0a | 09 09 20 2a 20 54 68 69 | found..|.. * Thi|
|00004370| 73 20 74 61 6b 65 73 20 | 63 61 72 65 20 6f 66 20 |s takes |care of |
|00004380| 22 2d 2d 22 2c 20 66 6f | 72 20 65 78 61 6d 70 6c |"--", fo|r exampl|
|00004390| 65 2e 0a 09 09 20 2a 2f | 0a 09 09 69 66 20 28 2a |e.... */|...if (*|
|000043a0| 70 6c 61 63 65 20 3d 3d | 20 70 6c 61 63 65 5b 2d |place ==| place[-|
|000043b0| 31 5d 29 20 7b 0a 09 09 | 09 2b 2b 6f 70 74 69 6e |1]) {...|.++optin|
|000043c0| 64 3b 0a 09 09 09 72 65 | 74 75 72 6e 20 28 45 4f |d;....re|turn (EO|
|000043d0| 46 29 3b 0a 09 09 7d 0a | 09 7d 0a 0a 09 2f 2a 0a |F);...}.|.}.../*.|
|000043e0| 09 20 2a 20 49 66 20 74 | 68 65 20 6f 70 74 69 6f |. * If t|he optio|
|000043f0| 6e 20 69 73 20 61 20 73 | 65 70 61 72 61 74 6f 72 |n is a s|eparator|
|00004400| 20 6f 72 20 74 68 65 20 | 6f 70 74 69 6f 6e 20 69 | or the |option i|
|00004410| 73 6e 27 74 20 69 6e 20 | 74 68 65 20 6c 69 73 74 |sn't in |the list|
|00004420| 2c 0a 09 20 2a 20 77 65 | 27 76 65 20 67 6f 74 20 |,.. * we|'ve got |
|00004430| 61 6e 20 65 72 72 6f 72 | 2e 0a 09 20 2a 2f 0a 09 |an error|... */..|
|00004440| 6f 70 74 6f 70 74 20 3d | 20 28 69 6e 74 29 2a 70 |optopt =| (int)*p|
|00004450| 6c 61 63 65 2b 2b 3b 0a | 09 6f 6c 69 20 3d 20 5f |lace++;.|.oli = _|
|00004460| 73 69 6e 64 65 78 28 6f | 73 74 72 2c 20 6f 70 74 |sindex(o|str, opt|
|00004470| 6f 70 74 29 3b 0a 09 69 | 66 20 28 6f 70 74 6f 70 |opt);..i|f (optop|
|00004480| 74 20 3d 3d 20 6f 70 74 | 6e 65 65 64 20 7c 7c 20 |t == opt|need || |
|00004490| 6f 70 74 6f 70 74 20 3d | 3d 20 6f 70 74 6d 61 79 |optopt =|= optmay|
|000044a0| 62 65 20 7c 7c 20 6f 6c | 69 20 3d 3d 20 4e 55 4c |be || ol|i == NUL|
|000044b0| 4c 29 20 7b 0a 09 09 2f | 2a 0a 09 09 20 2a 20 49 |L) {.../|*... * I|
|000044c0| 66 20 77 65 27 72 65 20 | 61 74 20 74 68 65 20 65 |f we're |at the e|
|000044d0| 6e 64 20 6f 66 20 74 68 | 65 20 63 75 72 72 65 6e |nd of th|e curren|
|000044e0| 74 20 61 72 67 75 6d 65 | 6e 74 2c 20 62 75 6d 70 |t argume|nt, bump|
|000044f0| 20 74 68 65 0a 09 09 20 | 2a 20 61 72 67 75 6d 65 | the... |* argume|
|00004500| 6e 74 20 69 6e 64 65 78 | 2e 0a 09 09 20 2a 2f 0a |nt index|.... */.|
|00004510| 09 09 69 66 20 28 2a 70 | 6c 61 63 65 20 3d 3d 20 |..if (*p|lace == |
|00004520| 27 5c 30 27 29 20 7b 0a | 09 09 09 2b 2b 6f 70 74 |'\0') {.|...++opt|
|00004530| 69 6e 64 3b 0a 09 09 7d | 0a 09 09 54 45 4c 4c 28 |ind;...}|...TELL(|
|00004540| 22 3a 20 69 6c 6c 65 67 | 61 6c 20 6f 70 74 69 6f |": illeg|al optio|
|00004550| 6e 20 2d 2d 20 22 29 3b | 09 2f 2a 20 62 79 65 62 |n -- ");|./* byeb|
|00004560| 79 65 20 2a 2f 0a 09 7d | 0a 0a 09 2f 2a 0a 09 20 |ye */..}|.../*.. |
|00004570| 2a 20 49 66 20 74 68 65 | 72 65 20 69 73 20 6e 6f |* If the|re is no|
|00004580| 20 61 72 67 75 6d 65 6e | 74 20 69 6e 64 69 63 61 | argumen|t indica|
|00004590| 74 6f 72 2c 20 74 68 65 | 6e 20 77 65 20 64 6f 6e |tor, the|n we don|
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+--------+-------------------------+-------------------------+--------+--------+