/ Source Code 1992 March / Source_Code_CD-ROM_Walnut_Creek_March_1992.iso / usenet / compsrcs / unix / volume22 / tpipe

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+--------+-------------------------+-------------------------+--------+--------+
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|00000010| 75 73 63 21 62 62 6e 2e | 63 6f 6d 21 70 61 70 61 |usc!bbn.|com!papa|
|00000020| 79 61 2e 62 62 6e 2e 63 | 6f 6d 21 72 73 61 6c 7a |ya.bbn.c|om!rsalz|
|00000030| 0a 46 72 6f 6d 3a 20 72 | 73 61 6c 7a 40 75 75 6e |.From: r|salz@uun|
|00000040| 65 74 2e 75 75 2e 6e 65 | 74 20 28 52 69 63 68 20 |et.uu.ne|t (Rich |
|00000050| 53 61 6c 7a 29 0a 4e 65 | 77 73 67 72 6f 75 70 73 |Salz).Ne|wsgroups|
|00000060| 3a 20 63 6f 6d 70 2e 73 | 6f 75 72 63 65 73 2e 75 |: comp.s|ources.u|
|00000070| 6e 69 78 0a 53 75 62 6a | 65 63 74 3a 20 76 32 32 |nix.Subj|ect: v22|
|00000080| 69 30 31 31 3a 20 20 41 | 20 22 74 65 65 22 20 74 |i011:  A| "tee" t|
|00000090| 68 61 74 20 66 65 65 64 | 73 20 69 6e 74 6f 20 70 |hat feed|s into p|
|000000a0| 69 70 65 73 2e 0a 4d 65 | 73 73 61 67 65 2d 49 44 |ipes..Me|ssage-ID|
|000000b0| 3a 20 3c 32 34 38 34 40 | 70 61 70 61 79 61 2e 62 |: <2484@|papaya.b|
|000000c0| 62 6e 2e 63 6f 6d 3e 0a | 44 61 74 65 3a 20 33 20 |bn.com>.|Date: 3 |
|000000d0| 4d 61 79 20 39 30 20 32 | 30 3a 34 33 3a 34 36 20 |May 90 2|0:43:46 |
|000000e0| 47 4d 54 0a 4c 69 6e 65 | 73 3a 20 32 36 33 0a 41 |GMT.Line|s: 263.A|
|000000f0| 70 70 72 6f 76 65 64 3a | 20 72 73 61 6c 7a 40 75 |pproved:| rsalz@u|
|00000100| 75 6e 65 74 2e 55 55 2e | 4e 45 54 0a 58 2d 43 68 |unet.UU.|NET.X-Ch|
|00000110| 65 63 6b 73 75 6d 2d 53 | 6e 65 66 72 75 3a 20 65 |ecksum-S|nefru: e|
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|00000140| 61 30 0a 0a 53 75 62 6d | 69 74 74 65 64 2d 62 79 |a0..Subm|itted-by|
|00000150| 3a 20 44 61 76 69 64 20 | 42 20 52 6f 73 65 6e 20 |: David |B Rosen |
|00000160| 3c 72 6f 73 65 6e 40 62 | 75 63 61 73 62 2e 62 75 |<rosen@b|ucasb.bu|
|00000170| 2e 65 64 75 3e 0a 50 6f | 73 74 69 6e 67 2d 6e 75 |.edu>.Po|sting-nu|
|00000180| 6d 62 65 72 3a 20 56 6f | 6c 75 6d 65 20 32 32 2c |mber: Vo|lume 22,|
|00000190| 20 49 73 73 75 65 20 31 | 31 0a 41 72 63 68 69 76 | Issue 1|1.Archiv|
|000001a0| 65 2d 6e 61 6d 65 3a 20 | 74 70 69 70 65 0a 0a 74 |e-name: |tpipe..t|
|000001b0| 70 69 70 65 20 69 73 20 | 61 20 73 69 6d 70 6c 65 |pipe is |a simple|
|000001c0| 20 75 74 69 6c 69 74 79 | 20 70 72 6f 67 72 61 6d | utility| program|
|000001d0| 20 74 68 61 74 20 63 61 | 6e 20 62 65 20 75 73 65 | that ca|n be use|
|000001e0| 64 20 74 6f 20 73 70 6c | 69 74 20 61 20 75 6e 69 |d to spl|it a uni|
|000001f0| 78 0a 70 69 70 65 6c 69 | 6e 65 20 69 6e 74 6f 20 |x.pipeli|ne into |
|00000200| 74 77 6f 20 70 69 70 65 | 6c 69 6e 65 73 2e 20 54 |two pipe|lines. T|
|00000210| 68 61 74 20 69 73 2c 20 | 74 68 65 20 6f 75 74 70 |hat is, |the outp|
|00000220| 75 74 20 6f 66 20 6f 6e | 65 20 70 69 70 65 6c 69 |ut of on|e pipeli|
|00000230| 6e 65 20 63 61 6e 0a 62 | 65 20 72 65 70 6c 69 63 |ne can.b|e replic|
|00000240| 61 74 65 64 20 61 6e 64 | 20 73 75 70 70 6c 69 65 |ated and| supplie|
|00000250| 64 20 61 73 20 74 68 65 | 20 69 6e 70 75 74 20 74 |d as the| input t|
|00000260| 6f 20 74 77 6f 20 6f 74 | 68 65 72 20 70 69 70 65 |o two ot|her pipe|
|00000270| 6c 69 6e 65 73 0a 65 78 | 65 63 75 74 69 6e 67 20 |lines.ex|ecuting |
|00000280| 73 69 6d 75 6c 74 61 6e | 65 6f 75 73 6c 79 2e 0a |simultan|eously..|
|00000290| 0a 46 6f 72 20 65 78 61 | 6d 70 6c 65 0a 20 20 20 |.For exa|mple.   |
|000002a0| 20 63 6d 64 31 20 3c 69 | 6e 66 69 6c 65 20 7c 20 | cmd1 <i|nfile | |
|000002b0| 74 70 69 70 65 20 22 63 | 6d 64 32 20 7c 20 63 6d |tpipe "c|md2 | cm|
|000002c0| 64 33 20 3e 6f 75 74 66 | 69 6c 65 22 20 7c 20 63 |d3 >outf|ile" | c|
|000002d0| 6d 64 34 20 0a 77 69 6c | 6c 20 6c 6f 6f 6b 20 6c |md4 .wil|l look l|
|000002e0| 69 6b 65 20 74 68 69 73 | 20 64 69 61 67 72 61 6d |ike this| diagram|
|000002f0| 61 74 69 63 61 6c 6c 79 | 3a 0a 09 09 09 20 2d 2d |atically|:.... --|
|00000300| 3e 20 63 6d 64 32 20 2d | 2d 3e 20 63 6d 64 33 20 |> cmd2 -|-> cmd3 |
|00000310| 2d 2d 3e 20 6f 75 74 66 | 69 6c 65 0a 09 09 20 20 |--> outf|ile...  |
|00000320| 20 20 20 20 20 2f 0a 20 | 20 20 20 69 6e 66 69 6c |     /. |   infil|
|00000330| 65 20 20 2d 2d 3e 20 63 | 6d 64 31 20 2d 3c 0a 09 |e  --> c|md1 -<..|
|00000340| 09 20 20 20 20 20 20 20 | 5c 5c 0a 09 09 09 20 2d |.       |\\.... -|
|00000350| 2d 3e 20 63 6d 64 34 20 | 2d 2d 3e 20 20 28 73 74 |-> cmd4 |-->  (st|
|00000360| 61 6e 64 61 72 64 20 6f | 75 74 70 75 74 29 0a 0a |andard o|utput)..|
|00000370| 23 21 20 2f 62 69 6e 2f | 73 68 0a 23 20 54 68 69 |#! /bin/|sh.# Thi|
|00000380| 73 20 69 73 20 61 20 73 | 68 65 6c 6c 20 61 72 63 |s is a s|hell arc|
|00000390| 68 69 76 65 2e 20 20 52 | 65 6d 6f 76 65 20 61 6e |hive.  R|emove an|
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|000003c0| 70 61 63 6b 0a 23 20 69 | 74 20 62 79 20 73 61 76 |pack.# i|t by sav|
|000003d0| 69 6e 67 20 69 74 20 69 | 6e 74 6f 20 61 20 66 69 |ing it i|nto a fi|
|000003e0| 6c 65 20 61 6e 64 20 74 | 79 70 69 6e 67 20 22 73 |le and t|yping "s|
|000003f0| 68 20 66 69 6c 65 22 2e | 20 20 54 6f 20 6f 76 65 |h file".|  To ove|
|00000400| 72 77 72 69 74 65 20 65 | 78 69 73 74 69 6e 67 0a |rwrite e|xisting.|
|00000410| 23 20 66 69 6c 65 73 2c | 20 74 79 70 65 20 22 73 |# files,| type "s|
|00000420| 68 20 66 69 6c 65 20 2d | 63 22 2e 20 20 59 6f 75 |h file -|c".  You|
|00000430| 20 63 61 6e 20 61 6c 73 | 6f 20 66 65 65 64 20 74 | can als|o feed t|
|00000440| 68 69 73 20 61 73 20 73 | 74 61 6e 64 61 72 64 20 |his as s|tandard |
|00000450| 69 6e 70 75 74 20 76 69 | 61 0a 23 20 75 6e 73 68 |input vi|a.# unsh|
|00000460| 61 72 2c 20 6f 72 20 62 | 79 20 74 79 70 69 6e 67 |ar, or b|y typing|
|00000470| 20 22 73 68 20 3c 66 69 | 6c 65 22 2c 20 65 2e 67 | "sh <fi|le", e.g|
|00000480| 2e 2e 20 20 49 66 20 74 | 68 69 73 20 61 72 63 68 |..  If t|his arch|
|00000490| 69 76 65 20 69 73 20 63 | 6f 6d 70 6c 65 74 65 2c |ive is c|omplete,|
|000004a0| 20 79 6f 75 0a 23 20 77 | 69 6c 6c 20 73 65 65 20 | you.# w|ill see |
|000004b0| 74 68 65 20 66 6f 6c 6c | 6f 77 69 6e 67 20 6d 65 |the foll|owing me|
|000004c0| 73 73 61 67 65 20 61 74 | 20 74 68 65 20 65 6e 64 |ssage at| the end|
|000004d0| 3a 0a 23 09 09 22 45 6e | 64 20 6f 66 20 73 68 65 |:.#.."En|d of she|
|000004e0| 6c 6c 20 61 72 63 68 69 | 76 65 2e 22 0a 23 20 43 |ll archi|ve.".# C|
|000004f0| 6f 6e 74 65 6e 74 73 3a | 20 20 4d 61 6b 65 66 69 |ontents:|  Makefi|
|00000500| 6c 65 20 52 45 41 44 4d | 45 20 74 70 69 70 65 2e |le READM|E tpipe.|
|00000510| 31 20 74 70 69 70 65 2e | 63 0a 23 20 57 72 61 70 |1 tpipe.|c.# Wrap|
|00000520| 70 65 64 20 62 79 20 72 | 73 61 6c 7a 40 70 61 70 |ped by r|salz@pap|
|00000530| 61 79 61 2e 62 62 6e 2e | 63 6f 6d 20 6f 6e 20 54 |aya.bbn.|com on T|
|00000540| 68 75 20 4d 61 79 20 20 | 33 20 31 36 3a 34 30 3a |hu May  |3 16:40:|
|00000550| 31 30 20 31 39 39 30 0a | 50 41 54 48 3d 2f 62 69 |10 1990.|PATH=/bi|
|00000560| 6e 3a 2f 75 73 72 2f 62 | 69 6e 3a 2f 75 73 72 2f |n:/usr/b|in:/usr/|
|00000570| 75 63 62 20 3b 20 65 78 | 70 6f 72 74 20 50 41 54 |ucb ; ex|port PAT|
|00000580| 48 0a 69 66 20 74 65 73 | 74 20 2d 66 20 27 4d 61 |H.if tes|t -f 'Ma|
|00000590| 6b 65 66 69 6c 65 27 20 | 2d 61 20 22 24 7b 31 7d |kefile' |-a "${1}|
|000005a0| 22 20 21 3d 20 22 2d 63 | 22 20 3b 20 74 68 65 6e |" != "-c|" ; then|
|000005b0| 20 0a 20 20 65 63 68 6f | 20 73 68 61 72 3a 20 57 | .  echo| shar: W|
|000005c0| 69 6c 6c 20 6e 6f 74 20 | 63 6c 6f 62 62 65 72 20 |ill not |clobber |
|000005d0| 65 78 69 73 74 69 6e 67 | 20 66 69 6c 65 20 5c 22 |existing| file \"|
|000005e0| 27 4d 61 6b 65 66 69 6c | 65 27 5c 22 0a 65 6c 73 |'Makefil|e'\".els|
|000005f0| 65 0a 65 63 68 6f 20 73 | 68 61 72 3a 20 45 78 74 |e.echo s|har: Ext|
|00000600| 72 61 63 74 69 6e 67 20 | 5c 22 27 4d 61 6b 65 66 |racting |\"'Makef|
|00000610| 69 6c 65 27 5c 22 20 5c | 28 31 30 37 20 63 68 61 |ile'\" \|(107 cha|
|00000620| 72 61 63 74 65 72 73 5c | 29 0a 73 65 64 20 22 73 |racters\|).sed "s|
|00000630| 2f 5e 58 2f 2f 22 20 3e | 27 4d 61 6b 65 66 69 6c |/^X//" >|'Makefil|
|00000640| 65 27 20 3c 3c 27 45 4e | 44 5f 4f 46 5f 46 49 4c |e' <<'EN|D_OF_FIL|
|00000650| 45 27 0a 58 43 43 20 3d | 09 09 63 63 0a 58 43 46 |E'.XCC =|..cc.XCF|
|00000660| 4c 41 47 53 20 3d 09 2d | 4f 0a 58 54 50 49 50 45 |LAGS =.-|O.XTPIPE|
|00000670| 20 3d 09 09 74 70 69 70 | 65 0a 58 43 46 49 4c 45 | =..tpip|e.XCFILE|
|00000680| 53 20 3d 09 74 70 69 70 | 65 2e 63 0a 58 0a 58 24 |S =.tpip|e.c.X.X$|
|00000690| 28 54 50 49 50 45 29 3a | 20 24 28 43 46 49 4c 45 |(TPIPE):| $(CFILE|
|000006a0| 53 29 0a 58 09 24 28 43 | 43 29 20 24 28 43 46 4c |S).X.$(C|C) $(CFL|
|000006b0| 41 47 53 29 20 24 28 43 | 46 49 4c 45 53 29 20 2d |AGS) $(C|FILES) -|
|000006c0| 6f 20 24 40 0a 45 4e 44 | 5f 4f 46 5f 46 49 4c 45 |o $@.END|_OF_FILE|
|000006d0| 0a 69 66 20 74 65 73 74 | 20 31 30 37 20 2d 6e 65 |.if test| 107 -ne|
|000006e0| 20 60 77 63 20 2d 63 20 | 3c 27 4d 61 6b 65 66 69 | `wc -c |<'Makefi|
|000006f0| 6c 65 27 60 3b 20 74 68 | 65 6e 0a 20 20 20 20 65 |le'`; th|en.    e|
|00000700| 63 68 6f 20 73 68 61 72 | 3a 20 5c 22 27 4d 61 6b |cho shar|: \"'Mak|
|00000710| 65 66 69 6c 65 27 5c 22 | 20 75 6e 70 61 63 6b 65 |efile'\"| unpacke|
|00000720| 64 20 77 69 74 68 20 77 | 72 6f 6e 67 20 73 69 7a |d with w|rong siz|
|00000730| 65 21 0a 66 69 0a 23 20 | 65 6e 64 20 6f 66 20 27 |e!.fi.# |end of '|
|00000740| 4d 61 6b 65 66 69 6c 65 | 27 0a 66 69 0a 69 66 20 |Makefile|'.fi.if |
|00000750| 74 65 73 74 20 2d 66 20 | 27 52 45 41 44 4d 45 27 |test -f |'README'|
|00000760| 20 2d 61 20 22 24 7b 31 | 7d 22 20 21 3d 20 22 2d | -a "${1|}" != "-|
|00000770| 63 22 20 3b 20 74 68 65 | 6e 20 0a 20 20 65 63 68 |c" ; the|n .  ech|
|00000780| 6f 20 73 68 61 72 3a 20 | 57 69 6c 6c 20 6e 6f 74 |o shar: |Will not|
|00000790| 20 63 6c 6f 62 62 65 72 | 20 65 78 69 73 74 69 6e | clobber| existin|
|000007a0| 67 20 66 69 6c 65 20 5c | 22 27 52 45 41 44 4d 45 |g file \|"'README|
|000007b0| 27 5c 22 0a 65 6c 73 65 | 0a 65 63 68 6f 20 73 68 |'\".else|.echo sh|
|000007c0| 61 72 3a 20 45 78 74 72 | 61 63 74 69 6e 67 20 5c |ar: Extr|acting \|
|000007d0| 22 27 52 45 41 44 4d 45 | 27 5c 22 20 5c 28 32 31 |"'README|'\" \(21|
|000007e0| 31 38 20 63 68 61 72 61 | 63 74 65 72 73 5c 29 0a |18 chara|cters\).|
|000007f0| 73 65 64 20 22 73 2f 5e | 58 2f 2f 22 20 3e 27 52 |sed "s/^|X//" >'R|
|00000800| 45 41 44 4d 45 27 20 3c | 3c 27 45 4e 44 5f 4f 46 |EADME' <|<'END_OF|
|00000810| 5f 46 49 4c 45 27 0a 58 | 2d 2d 2d 2d 2d 2d 2d 2d |_FILE'.X|--------|
|00000820| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000830| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000840| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|00000850| 2d 2d 2d 2d 2d 0a 58 74 | 70 69 70 65 20 2d 2d 20 |-----.Xt|pipe -- |
|00000860| 20 72 65 70 6c 69 63 61 | 74 65 20 73 74 61 6e 64 | replica|te stand|
|00000870| 61 72 64 20 6f 75 74 70 | 75 74 20 74 6f 20 61 6e |ard outp|ut to an|
|00000880| 20 61 64 64 69 74 69 6f | 6e 61 6c 20 70 69 70 65 | additio|nal pipe|
|00000890| 6c 69 6e 65 0a 58 20 20 | 20 20 20 20 20 20 20 20 |line.X  |        |
|000008a0| 20 20 20 20 76 65 72 73 | 69 6f 6e 20 31 2e 30 32 |    vers|ion 1.02|
|000008b0| 20 20 20 20 36 20 4d 61 | 72 2e 20 31 39 39 30 0a |    6 Ma|r. 1990.|
|000008c0| 58 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |X-------|--------|
|000008d0| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|000008e0| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 2d 2d |--------|--------|
|000008f0| 2d 2d 2d 2d 2d 2d 2d 2d | 2d 2d 2d 2d 2d 2d 0a 58 |--------|------.X|
|00000900| 0a 58 74 70 69 70 65 20 | 69 73 20 61 20 73 69 6d |.Xtpipe |is a sim|
|00000910| 70 6c 65 20 75 74 69 6c | 69 74 79 20 70 72 6f 67 |ple util|ity prog|
|00000920| 72 61 6d 20 74 68 61 74 | 20 63 61 6e 20 62 65 20 |ram that| can be |
|00000930| 75 73 65 64 20 74 6f 20 | 73 70 6c 69 74 20 61 20 |used to |split a |
|00000940| 75 6e 69 78 0a 58 70 69 | 70 65 6c 69 6e 65 20 69 |unix.Xpi|peline i|
|00000950| 6e 74 6f 20 74 77 6f 20 | 70 69 70 65 6c 69 6e 65 |nto two |pipeline|
|00000960| 73 2e 20 54 68 61 74 20 | 69 73 2c 20 74 68 65 20 |s. That |is, the |
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|00000980| 70 65 6c 69 6e 65 20 63 | 61 6e 0a 58 62 65 20 72 |peline c|an.Xbe r|
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|000009b0| 70 75 74 20 74 6f 20 74 | 77 6f 20 6f 74 68 65 72 |put to t|wo other|
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|000009d0| 75 74 69 6e 67 20 73 69 | 6d 75 6c 74 61 6e 65 6f |uting si|multaneo|
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|00000c00| 29 2c 0a 58 61 6e 64 20 | 49 20 77 61 6e 74 65 64 |),.Xand |I wanted|
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|00000c30| 20 74 6f 20 74 68 65 20 | 73 61 6d 65 20 69 6e 70 | to the |same inp|
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|00000c90| 68 61 76 65 20 74 6f 20 | 65 78 65 63 75 74 65 20 |have to |execute |
|00000ca0| 74 68 65 20 65 61 72 6c | 79 20 70 61 72 74 73 20 |the earl|y parts |
|00000cb0| 6d 75 6c 74 69 70 6c 65 | 20 74 69 6d 65 73 2e 20 |multiple| times. |
|00000cc0| 49 20 64 69 64 20 6e 6f | 74 20 68 61 76 65 20 65 |I did no|t have e|
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|00000cf0| 77 6f 75 6c 64 20 68 61 | 76 65 20 62 65 65 6e 20 |would ha|ve been |
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|00000d40| 74 6f 20 6e 61 6d 65 64 | 20 70 69 70 65 73 2c 20 |to named| pipes, |
|00000d50| 62 75 74 20 61 6e 79 77 | 61 79 20 69 74 27 73 0a |but anyw|ay it's.|
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|00001b30| 52 20 74 65 65 20 28 31 | 29 2c 0a 58 2e 42 52 20 |R tee (1|),.X.BR |
|00001b40| 73 68 20 28 31 29 2c 0a | 58 2e 42 52 20 63 61 74 |sh (1),.|X.BR cat|
|00001b50| 20 28 31 29 0a 58 0a 58 | 2e 53 48 20 41 55 54 48 | (1).X.X|.SH AUTH|
|00001b60| 4f 52 0a 58 44 61 76 69 | 64 20 42 20 52 6f 73 65 |OR.XDavi|d B Rose|
|00001b70| 6e 0a 58 2e 50 50 0a 58 | 54 48 49 53 20 53 4f 46 |n.X.PP.X|THIS SOF|
|00001b80| 54 57 41 52 45 20 49 53 | 20 50 52 4f 56 49 44 45 |TWARE IS| PROVIDE|
|00001b90| 44 20 22 41 53 20 49 53 | 22 20 41 4e 44 20 57 49 |D "AS IS|" AND WI|
|00001ba0| 54 48 4f 55 54 20 45 58 | 50 52 45 53 53 20 4f 52 |THOUT EX|PRESS OR|
|00001bb0| 20 49 4d 50 4c 49 45 44 | 20 57 41 52 52 41 4e 54 | IMPLIED| WARRANT|
|00001bc0| 59 2e 0a 45 4e 44 5f 4f | 46 5f 46 49 4c 45 0a 69 |Y..END_O|F_FILE.i|
|00001bd0| 66 20 74 65 73 74 20 32 | 34 36 35 20 2d 6e 65 20 |f test 2|465 -ne |
|00001be0| 60 77 63 20 2d 63 20 3c | 27 74 70 69 70 65 2e 31 |`wc -c <|'tpipe.1|
|00001bf0| 27 60 3b 20 74 68 65 6e | 0a 20 20 20 20 65 63 68 |'`; then|.    ech|
|00001c00| 6f 20 73 68 61 72 3a 20 | 5c 22 27 74 70 69 70 65 |o shar: |\"'tpipe|
|00001c10| 2e 31 27 5c 22 20 75 6e | 70 61 63 6b 65 64 20 77 |.1'\" un|packed w|
|00001c20| 69 74 68 20 77 72 6f 6e | 67 20 73 69 7a 65 21 0a |ith wron|g size!.|
|00001c30| 66 69 0a 23 20 65 6e 64 | 20 6f 66 20 27 74 70 69 |fi.# end| of 'tpi|
|00001c40| 70 65 2e 31 27 0a 66 69 | 0a 69 66 20 74 65 73 74 |pe.1'.fi|.if test|
|00001c50| 20 2d 66 20 27 74 70 69 | 70 65 2e 63 27 20 2d 61 | -f 'tpi|pe.c' -a|
|00001c60| 20 22 24 7b 31 7d 22 20 | 21 3d 20 22 2d 63 22 20 | "${1}" |!= "-c" |
|00001c70| 3b 20 74 68 65 6e 20 0a | 20 20 65 63 68 6f 20 73 |; then .|  echo s|
|00001c80| 68 61 72 3a 20 57 69 6c | 6c 20 6e 6f 74 20 63 6c |har: Wil|l not cl|
|00001c90| 6f 62 62 65 72 20 65 78 | 69 73 74 69 6e 67 20 66 |obber ex|isting f|
|00001ca0| 69 6c 65 20 5c 22 27 74 | 70 69 70 65 2e 63 27 5c |ile \"'t|pipe.c'\|
|00001cb0| 22 0a 65 6c 73 65 0a 65 | 63 68 6f 20 73 68 61 72 |".else.e|cho shar|
|00001cc0| 3a 20 45 78 74 72 61 63 | 74 69 6e 67 20 5c 22 27 |: Extrac|ting \"'|
|00001cd0| 74 70 69 70 65 2e 63 27 | 5c 22 20 5c 28 31 36 30 |tpipe.c'|\" \(160|
|00001ce0| 33 20 63 68 61 72 61 63 | 74 65 72 73 5c 29 0a 73 |3 charac|ters\).s|
|00001cf0| 65 64 20 22 73 2f 5e 58 | 2f 2f 22 20 3e 27 74 70 |ed "s/^X|//" >'tp|
|00001d00| 69 70 65 2e 63 27 20 3c | 3c 27 45 4e 44 5f 4f 46 |ipe.c' <|<'END_OF|
|00001d10| 5f 46 49 4c 45 27 0a 58 | 2f 2a 20 74 70 69 70 65 |_FILE'.X|/* tpipe|
|00001d20| 2e 63 20 2d 2d 20 74 65 | 65 20 61 20 70 69 70 65 |.c -- te|e a pipe|
|00001d30| 6c 69 6e 65 20 69 6e 74 | 6f 20 74 77 6f 20 70 69 |line int|o two pi|
|00001d40| 70 65 6c 69 6e 65 73 2e | 20 4c 69 6b 65 20 74 65 |pelines.| Like te|
|00001d50| 65 28 31 29 20 62 75 74 | 20 0a 58 20 20 20 61 72 |e(1) but| .X   ar|
|00001d60| 67 75 6d 65 6e 74 20 69 | 73 20 61 20 63 6f 6d 6d |gument i|s a comm|
|00001d70| 61 6e 64 20 6f 72 20 70 | 69 70 65 6c 69 6e 65 20 |and or p|ipeline |
|00001d80| 72 61 74 68 65 72 20 74 | 68 61 6e 20 61 20 66 69 |rather t|han a fi|
|00001d90| 6c 65 2e 0a 58 0a 58 20 | 20 20 53 65 65 20 74 68 |le..X.X |  See th|
|00001da0| 65 20 6d 61 6e 20 70 61 | 67 65 20 74 70 69 70 65 |e man pa|ge tpipe|
|00001db0| 28 31 29 20 73 75 70 70 | 6c 69 65 64 20 77 69 74 |(1) supp|lied wit|
|00001dc0| 68 20 74 68 69 73 20 73 | 6f 66 74 77 61 72 65 2e |h this s|oftware.|
|00001dd0| 0a 58 0a 58 20 20 20 54 | 68 69 73 20 76 65 72 73 |.X.X   T|his vers|
|00001de0| 69 6f 6e 20 75 73 65 73 | 20 74 68 65 20 75 6e 69 |ion uses| the uni|
|00001df0| 78 20 73 79 73 74 65 6d | 20 63 61 6c 6c 73 20 70 |x system| calls p|
|00001e00| 6f 70 65 6e 28 33 29 2c | 20 72 65 61 64 28 32 29 |open(3),| read(2)|
|00001e10| 2c 20 61 6e 64 0a 58 20 | 20 20 77 72 69 74 65 28 |, and.X |  write(|
|00001e20| 32 29 2e 20 20 49 74 20 | 75 73 65 73 20 77 72 69 |2).  It |uses wri|
|00001e30| 74 65 28 32 29 20 74 6f | 20 77 72 69 74 65 20 64 |te(2) to| write d|
|00001e40| 69 72 65 63 74 6c 79 20 | 74 6f 20 74 68 65 20 66 |irectly |to the f|
|00001e50| 69 6c 65 6e 6f 28 29 20 | 6f 66 0a 58 20 20 20 6f |ileno() |of.X   o|
|00001e60| 66 20 74 68 65 20 66 69 | 6c 65 20 70 6f 69 6e 74 |f the fi|le point|
|00001e70| 65 72 20 73 74 72 65 61 | 6d 20 72 65 74 75 72 6e |er strea|m return|
|00001e80| 65 64 20 62 79 20 70 6f | 70 65 6e 2e 0a 58 0a 58 |ed by po|pen..X.X|
|00001e90| 20 20 20 49 27 76 65 20 | 74 72 69 65 64 20 69 74 |   I've |tried it|
|00001ea0| 20 6f 75 74 20 75 6e 64 | 65 72 20 42 53 44 2c 20 | out und|er BSD, |
|00001eb0| 53 79 73 74 65 6d 20 56 | 2c 20 61 6e 64 20 61 6e |System V|, and an|
|00001ec0| 20 6f 6c 64 65 72 20 76 | 65 72 73 69 6f 6e 20 6f | older v|ersion o|
|00001ed0| 66 20 75 6e 69 78 2c 0a | 58 20 20 20 62 75 74 3a |f unix,.|X   but:|
|00001ee0| 0a 58 0a 58 20 20 20 54 | 48 49 53 20 53 4f 46 54 |.X.X   T|HIS SOFT|
|00001ef0| 57 41 52 45 20 49 53 20 | 50 52 4f 56 49 44 45 44 |WARE IS |PROVIDED|
|00001f00| 20 22 41 53 20 49 53 22 | 20 41 4e 44 20 57 49 54 | "AS IS"| AND WIT|
|00001f10| 48 4f 55 54 20 45 58 50 | 52 45 53 53 20 4f 52 20 |HOUT EXP|RESS OR |
|00001f20| 49 4d 50 4c 49 45 44 20 | 0a 58 20 20 20 57 41 52 |IMPLIED |.X   WAR|
|00001f30| 52 41 4e 54 59 2e 0a 58 | 0a 58 20 20 20 56 65 72 |RANTY..X|.X   Ver|
|00001f40| 73 69 6f 6e 20 31 2e 30 | 32 20 28 34 20 4d 61 72 |sion 1.0|2 (4 Mar|
|00001f50| 20 31 39 38 39 29 20 28 | 55 73 65 20 66 69 6c 65 | 1989) (|Use file|
|00001f60| 6e 6f 28 29 29 0a 58 0a | 58 2d 2d 0a 58 44 61 76 |no()).X.|X--.XDav|
|00001f70| 69 64 20 42 20 52 6f 73 | 65 6e 2c 20 43 6f 67 6e |id B Ros|en, Cogn|
|00001f80| 69 74 69 76 65 20 26 20 | 4e 65 75 72 61 6c 20 53 |itive & |Neural S|
|00001f90| 79 73 74 65 6d 73 20 20 | 20 20 20 20 20 20 20 20 |ystems  |        |
|00001fa0| 20 20 20 20 20 20 20 20 | 72 6f 73 65 6e 40 62 75 |        |rosen@bu|
|00001fb0| 63 61 73 62 2e 62 75 2e | 65 64 75 0a 58 43 65 6e |casb.bu.|edu.XCen|
|00001fc0| 74 65 72 20 66 6f 72 20 | 41 64 61 70 74 69 76 65 |ter for |Adaptive|
|00001fd0| 20 53 79 73 74 65 6d 73 | 20 20 20 20 20 20 20 20 | Systems|        |
|00001fe0| 20 20 20 20 20 20 20 20 | 20 72 6f 73 65 6e 25 62 |        | rosen%b|
|00001ff0| 75 63 61 73 62 40 7b 62 | 75 61 63 63 61 2c 62 75 |ucasb@{b|uacca,bu|
|00002000| 2d 69 74 7d 2e 62 75 2e | 65 64 75 0a 58 42 6f 73 |-it}.bu.|edu.XBos|
|00002010| 74 6f 6e 20 55 6e 69 76 | 65 72 73 69 74 79 20 20 |ton Univ|ersity  |
|00002020| 20 20 20 20 20 20 20 20 | 20 20 20 20 7b 6d 69 74 |        |    {mit|
|00002030| 2d 65 64 64 69 65 2c 68 | 61 72 76 61 72 64 2c 75 |-eddie,h|arvard,u|
|00002040| 75 6e 65 74 7d 21 62 75 | 2e 65 64 75 21 74 68 61 |unet}!bu|.edu!tha|
|00002050| 6c 61 6d 75 73 21 72 6f | 73 65 6e 0a 58 0a 58 2a |lamus!ro|sen.X.X*|
|00002060| 2f 0a 58 0a 58 23 69 6e | 63 6c 75 64 65 20 3c 73 |/.X.X#in|clude <s|
|00002070| 74 64 69 6f 2e 68 3e 0a | 58 0a 58 2f 2a 23 64 65 |tdio.h>.|X.X/*#de|
|00002080| 66 69 6e 65 20 4e 4f 48 | 41 43 4b 2a 2f 0a 58 0a |fine NOH|ACK*/.X.|
|00002090| 58 23 69 66 6e 64 65 66 | 20 42 55 46 53 49 5a 0a |X#ifndef| BUFSIZ.|
|000020a0| 58 23 64 65 66 69 6e 65 | 20 42 55 46 53 49 5a 20 |X#define| BUFSIZ |
|000020b0| 32 30 34 38 0a 58 23 65 | 6e 64 69 66 20 2f 2a 42 |2048.X#e|ndif /*B|
|000020c0| 55 46 53 49 5a 2a 2f 0a | 58 0a 58 69 6e 74 20 6d |UFSIZ*/.|X.Xint m|
|000020d0| 61 69 6e 28 61 72 67 63 | 2c 20 61 72 67 76 29 0a |ain(argc|, argv).|
|000020e0| 58 20 20 20 20 20 69 6e | 74 20 61 72 67 63 3b 0a |X     in|t argc;.|
|000020f0| 58 20 20 20 20 20 63 68 | 61 72 20 2a 61 72 67 76 |X     ch|ar *argv|
|00002100| 5b 5d 3b 0a 58 7b 0a 58 | 20 20 63 68 61 72 20 62 |[];.X{.X|  char b|
|00002110| 75 66 5b 42 55 46 53 49 | 5a 5d 3b 0a 58 20 20 72 |uf[BUFSI|Z];.X  r|
|00002120| 65 67 69 73 74 65 72 20 | 46 49 4c 45 20 2a 73 75 |egister |FILE *su|
|00002130| 62 70 69 70 65 6c 69 6e | 65 20 3d 20 4e 55 4c 4c |bpipelin|e = NULL|
|00002140| 3b 0a 58 20 20 72 65 67 | 69 73 74 65 72 20 75 6e |;.X  reg|ister un|
|00002150| 73 69 67 6e 65 64 20 6e | 3b 0a 58 0a 58 20 20 69 |signed n|;.X.X  i|
|00002160| 66 20 28 61 72 67 63 20 | 3d 3d 20 32 29 7b 0a 58 |f (argc |== 2){.X|
|00002170| 20 20 20 20 69 66 20 28 | 2a 61 72 67 76 5b 31 5d |    if (|*argv[1]|
|00002180| 29 20 7b 0a 58 20 20 20 | 20 20 20 69 66 20 28 28 |) {.X   |   if ((|
|00002190| 73 75 62 70 69 70 65 6c | 69 6e 65 20 3d 20 70 6f |subpipel|ine = po|
|000021a0| 70 65 6e 28 61 72 67 76 | 5b 31 5d 2c 22 77 22 29 |pen(argv|[1],"w")|
|000021b0| 29 20 3d 3d 20 4e 55 4c | 4c 29 20 7b 0a 58 09 66 |) == NUL|L) {.X.f|
|000021c0| 70 72 69 6e 74 66 28 73 | 74 64 65 72 72 2c 20 22 |printf(s|tderr, "|
|000021d0| 25 73 3a 20 63 61 6e 27 | 74 20 63 72 65 61 74 65 |%s: can'|t create|
|000021e0| 20 73 75 62 70 69 70 65 | 6c 69 6e 65 20 25 73 5c | subpipe|line %s\|
|000021f0| 6e 22 2c 20 61 72 67 76 | 5b 30 5d 2c 20 61 72 67 |n", argv|[0], arg|
|00002200| 76 5b 31 5d 29 3b 0a 58 | 09 65 78 69 74 28 31 29 |v[1]);.X|.exit(1)|
|00002210| 3b 0a 58 20 20 20 20 20 | 20 7d 0a 58 20 20 20 20 |;.X     | }.X    |
|00002220| 7d 0a 58 20 20 7d 20 65 | 6c 73 65 20 69 66 20 28 |}.X  } e|lse if (|
|00002230| 61 72 67 63 20 3e 20 32 | 29 20 7b 0a 58 20 20 20 |argc > 2|) {.X   |
|00002240| 20 66 70 72 69 6e 74 66 | 28 73 74 64 65 72 72 2c | fprintf|(stderr,|
|00002250| 20 22 75 73 61 67 65 3a | 20 25 73 20 5b 70 69 70 | "usage:| %s [pip|
|00002260| 65 6c 69 6e 65 5d 5c 6e | 22 2c 20 61 72 67 76 5b |eline]\n|", argv[|
|00002270| 30 5d 29 3b 0a 58 20 20 | 20 20 65 78 69 74 28 32 |0]);.X  |  exit(2|
|00002280| 29 3b 0a 58 20 20 7d 0a | 58 0a 58 20 20 77 68 69 |);.X  }.|X.X  whi|
|00002290| 6c 65 20 28 28 6e 20 3d | 20 72 65 61 64 28 30 2c |le ((n =| read(0,|
|000022a0| 20 62 75 66 2c 20 42 55 | 46 53 49 5a 29 29 20 3e | buf, BU|FSIZ)) >|
|000022b0| 20 30 29 20 7b 0a 58 20 | 20 20 20 77 72 69 74 65 | 0) {.X |   write|
|000022c0| 28 31 2c 20 62 75 66 2c | 20 6e 29 3b 20 2f 2a 20 |(1, buf,| n); /* |
|000022d0| 77 72 69 74 65 20 74 6f | 20 73 74 61 6e 64 61 72 |write to| standar|
|000022e0| 64 20 6f 75 74 70 75 74 | 20 2a 2f 0a 58 20 20 20 |d output| */.X   |
|000022f0| 20 69 66 20 28 73 75 62 | 70 69 70 65 6c 69 6e 65 | if (sub|pipeline|
|00002300| 29 20 7b 20 20 2f 2a 20 | 77 72 69 74 65 20 74 6f |) {  /* |write to|
|00002310| 20 73 75 62 70 69 70 65 | 6c 69 6e 65 3a 20 2a 2f | subpipe|line: */|
|00002320| 0a 58 20 20 20 20 20 20 | 77 72 69 74 65 28 28 69 |.X      |write((i|
|00002330| 6e 74 29 66 69 6c 65 6e | 6f 28 73 75 62 70 69 70 |nt)filen|o(subpip|
|00002340| 65 6c 69 6e 65 29 2c 20 | 62 75 66 2c 20 6e 29 3b |eline), |buf, n);|
|00002350| 0a 58 20 20 20 20 7d 0a | 58 20 20 7d 0a 58 0a 58 |.X    }.|X  }.X.X|
|00002360| 20 20 69 66 20 28 73 75 | 62 70 69 70 65 6c 69 6e |  if (su|bpipelin|
|00002370| 65 29 20 70 63 6c 6f 73 | 65 28 73 75 62 70 69 70 |e) pclos|e(subpip|
|00002380| 65 6c 69 6e 65 29 3b 0a | 58 20 20 72 65 74 75 72 |eline);.|X  retur|
|00002390| 6e 20 30 3b 0a 58 7d 0a | 45 4e 44 5f 4f 46 5f 46 |n 0;.X}.|END_OF_F|
|000023a0| 49 4c 45 0a 69 66 20 74 | 65 73 74 20 31 36 30 33 |ILE.if t|est 1603|
|000023b0| 20 2d 6e 65 20 60 77 63 | 20 2d 63 20 3c 27 74 70 | -ne `wc| -c <'tp|
|000023c0| 69 70 65 2e 63 27 60 3b | 20 74 68 65 6e 0a 20 20 |ipe.c'`;| then.  |
|000023d0| 20 20 65 63 68 6f 20 73 | 68 61 72 3a 20 5c 22 27 |  echo s|har: \"'|
|000023e0| 74 70 69 70 65 2e 63 27 | 5c 22 20 75 6e 70 61 63 |tpipe.c'|\" unpac|
|000023f0| 6b 65 64 20 77 69 74 68 | 20 77 72 6f 6e 67 20 73 |ked with| wrong s|
|00002400| 69 7a 65 21 0a 66 69 0a | 23 20 65 6e 64 20 6f 66 |ize!.fi.|# end of|
|00002410| 20 27 74 70 69 70 65 2e | 63 27 0a 66 69 0a 65 63 | 'tpipe.|c'.fi.ec|
|00002420| 68 6f 20 73 68 61 72 3a | 20 45 6e 64 20 6f 66 20 |ho shar:| End of |
|00002430| 73 68 65 6c 6c 20 61 72 | 63 68 69 76 65 2e 0a 65 |shell ar|chive..e|
|00002440| 78 69 74 20 30 0a 65 78 | 69 74 20 30 20 23 20 4a |xit 0.ex|it 0 # J|
|00002450| 75 73 74 20 69 6e 20 63 | 61 73 65 2e 2e 2e 0a 2d |ust in c|ase....-|
|00002460| 2d 20 0a 50 6c 65 61 73 | 65 20 73 65 6e 64 20 63 |- .Pleas|e send c|
|00002470| 6f 6d 70 2e 73 6f 75 72 | 63 65 73 2e 75 6e 69 78 |omp.sour|ces.unix|
|00002480| 2d 72 65 6c 61 74 65 64 | 20 6d 61 69 6c 20 74 6f |-related| mail to|
|00002490| 20 72 73 61 6c 7a 40 75 | 75 6e 65 74 2e 75 75 2e | rsalz@u|unet.uu.|
|000024a0| 6e 65 74 2e 0a 55 73 65 | 20 61 20 64 6f 6d 61 69 |net..Use| a domai|
|000024b0| 6e 2d 62 61 73 65 64 20 | 61 64 64 72 65 73 73 20 |n-based |address |
|000024c0| 6f 72 20 67 69 76 65 20 | 61 6c 74 65 72 6e 61 74 |or give |alternat|
|000024d0| 65 20 70 61 74 68 73 2c | 20 6f 72 20 79 6f 75 20 |e paths,| or you |
|000024e0| 6d 61 79 20 6c 6f 73 65 | 20 6f 75 74 2e 0a       |may lose| out..  |
+--------+-------------------------+-------------------------+--------+--------+