Source Code 1994 March

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Tape Archive | 1989-02-26 | 24.0 KB
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MacOS 8.1 extracted |
Win98 extracted |
DOS extracted
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This file was processed as: Tape Archive (archive/tar).

You can browse this item here: dev_fd.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 dev-fd/, mode 755 , uid 243 , gid 12 , size 0 , seconds 4402110541	default
`98%`	file	data	default
`100%`	TrID	Sybase iAnywhere database files	default (weak)
`100%`	lsar	Tar	default
`100%`	gt2	TAR Archiv gefunden (Auflistung ist deaktiviert)	default
`100%`	disktype	Pre-POSIX tar archive	default
hex view
+--------+-------------------------+-------------------------+--------+--------+
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|00000bc0| 0a 41 72 6e 6f 6c 64 20 | 52 6f 62 62 69 6e 73 0a |.Arnold |Robbins.|
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|000037b0| 5f 65 72 72 6f 72 29 3b | 0a 0a 09 69 66 20 28 28 |_error);|...if ((|
|000037c0| 77 66 70 20 3d 20 67 65 | 74 66 28 6d 69 6e 6f 72 |wfp = ge|tf(minor|
|000037d0| 28 64 65 76 29 29 29 20 | 3d 3d 20 4e 55 4c 4c 29 |(dev))) |== NULL)|
|000037e0| 0a 09 09 72 65 74 75 72 | 6e 20 28 75 2e 75 5f 65 |...retur|n (u.u_e|
|000037f0| 72 72 6f 72 29 3b 0a 0a | 09 2f 2a 0a 09 20 2a 20 |rror);..|./*.. * |
|00003800| 57 65 20 6d 75 73 74 20 | 65 78 70 6c 69 63 69 74 |We must |explicit|
|00003810| 6c 79 20 74 65 73 74 20 | 66 6f 72 20 74 68 69 73 |ly test |for this|
|00003820| 20 63 61 73 65 20 62 65 | 63 61 75 73 65 20 75 66 | case be|cause uf|
|00003830| 61 6c 6c 6f 63 28 29 20 | 6d 61 79 0a 09 20 2a 20 |alloc() |may.. * |
|00003840| 68 61 76 65 20 61 6c 6c | 6f 63 61 74 65 64 20 75 |have all|ocated u|
|00003850| 73 20 74 68 65 20 73 61 | 6d 65 20 66 69 6c 65 20 |s the sa|me file |
|00003860| 64 65 73 72 69 70 74 6f | 72 20 77 65 20 61 72 65 |desripto|r we are|
|00003870| 20 72 65 66 65 72 72 69 | 6e 67 0a 09 20 2a 20 74 | referri|ng.. * t|
|00003880| 6f 2c 20 69 66 20 74 68 | 65 20 70 72 6f 63 63 65 |o, if th|e procce|
|00003890| 73 73 20 72 65 66 65 72 | 72 65 64 20 74 6f 20 61 |ss refer|red to a|
|000038a0| 6e 20 69 6e 76 61 6c 69 | 64 20 28 63 6c 6f 73 65 |n invali|d (close|
|000038b0| 64 29 20 64 65 73 63 72 | 69 70 74 6f 72 2e 0a 09 |d) descr|iptor...|
|000038c0| 20 2a 20 4f 72 64 69 6e | 61 72 69 6c 79 20 74 68 | * Ordin|arily th|
|000038d0| 69 73 20 77 6f 75 6c 64 | 20 62 65 20 63 61 75 67 |is would| be caug|
|000038e0| 68 74 20 62 79 20 67 65 | 74 66 28 29 2c 20 62 75 |ht by ge|tf(), bu|
|000038f0| 74 20 62 79 20 74 68 65 | 20 74 69 6d 65 20 77 65 |t by the| time we|
|00003900| 0a 09 20 2a 20 72 65 61 | 63 68 20 74 68 69 73 20 |.. * rea|ch this |
|00003910| 72 6f 75 74 69 6e 65 20 | 75 5f 70 6f 66 69 6c 65 |routine |u_pofile|
|00003920| 5b 6d 69 6e 6f 72 28 64 | 65 76 29 5d 20 63 6f 75 |[minor(d|ev)] cou|
|00003930| 6c 64 20 61 6c 72 65 61 | 64 79 20 62 65 20 73 65 |ld alrea|dy be se|
|00003940| 74 0a 09 20 2a 20 74 6f | 20 70 6f 69 6e 74 20 74 |t.. * to| point t|
|00003950| 6f 20 6f 75 72 20 66 69 | 6c 65 20 73 74 72 75 63 |o our fi|le struc|
|00003960| 74 2e 0a 09 20 2a 2f 0a | 09 69 66 20 28 66 70 20 |t... */.|.if (fp |
|00003970| 3d 3d 20 77 66 70 29 0a | 09 09 72 65 74 75 72 6e |== wfp).|..return|
|00003980| 20 28 45 42 41 44 46 29 | 3b 0a 0a 09 76 70 20 3d | (EBADF)|;...vp =|
|00003990| 20 2a 76 70 70 3b 0a 0a | 09 2f 2a 0a 09 20 2a 20 | *vpp;..|./*.. * |
|000039a0| 46 61 6b 65 20 61 20 60 | 60 64 75 70 28 29 27 27 |Fake a `|`dup()''|
|000039b0| 20 73 79 73 20 63 61 6c | 6c 20 69 66 20 69 74 20 | sys cal|l if it |
|000039c0| 69 73 6e 27 74 20 61 20 | 76 6e 6f 64 65 2e 0a 09 |isn't a |vnode...|
|000039d0| 20 2a 2f 0a 09 69 66 20 | 28 77 66 70 2d 3e 66 5f | */..if |(wfp->f_|
|000039e0| 74 79 70 65 20 21 3d 20 | 44 54 59 50 45 5f 56 4e |type != |DTYPE_VN|
|000039f0| 4f 44 45 29 20 7b 0a 09 | 09 2f 2a 0a 09 09 20 2a |ODE) {..|./*... *|
|00003a00| 20 43 68 65 63 6b 20 74 | 68 61 74 20 74 68 65 20 | Check t|hat the |
|00003a10| 6d 6f 64 65 20 74 68 65 | 20 66 69 6c 65 20 69 73 |mode the| file is|
|00003a20| 20 62 65 69 6e 67 20 6f | 70 65 6e 65 64 0a 09 09 | being o|pened...|
|00003a30| 20 2a 20 66 6f 72 20 69 | 73 20 63 6f 6e 73 69 73 | * for i|s consis|
|00003a40| 74 65 6e 74 20 77 69 74 | 68 20 74 68 65 20 6d 6f |tent wit|h the mo|
|00003a50| 64 65 20 6f 66 20 74 68 | 65 20 65 78 69 73 74 69 |de of th|e existi|
|00003a60| 6e 67 0a 09 09 20 2a 20 | 64 65 73 63 72 69 70 74 |ng... * |descript|
|00003a70| 6f 72 2e 20 54 68 69 73 | 20 69 73 6e 27 74 20 61 |or. This| isn't a|
|00003a80| 73 20 63 6c 65 61 6e 20 | 61 73 20 69 74 20 73 68 |s clean |as it sh|
|00003a90| 6f 75 6c 64 20 62 65 2c | 0a 09 09 20 2a 20 62 75 |ould be,|... * bu|
|00003aa0| 74 20 74 68 69 73 20 65 | 6e 74 69 72 65 20 64 72 |t this e|ntire dr|
|00003ab0| 69 76 65 72 20 69 73 20 | 61 20 72 65 61 6c 20 6b |iver is |a real k|
|00003ac0| 6c 75 64 67 65 20 61 6e | 79 77 61 79 2e 0a 09 09 |ludge an|yway....|
|00003ad0| 20 2a 2f 0a 09 09 72 77 | 6d 6f 64 65 20 3d 20 6d | */...rw|mode = m|
|00003ae0| 6f 64 65 20 26 20 28 46 | 52 45 41 44 7c 46 57 52 |ode & (F|READ|FWR|
|00003af0| 49 54 45 29 3b 0a 09 09 | 69 66 20 28 28 77 66 70 |ITE);...|if ((wfp|
|00003b00| 2d 3e 66 5f 66 6c 61 67 | 20 26 20 72 77 6d 6f 64 |->f_flag| & rwmod|
|00003b10| 65 29 20 21 3d 20 72 77 | 6d 6f 64 65 29 0a 09 09 |e) != rw|mode)...|
|00003b20| 09 72 65 74 75 72 6e 20 | 28 45 41 43 43 45 53 29 |.return |(EACCES)|
|00003b30| 3b 0a 0a 09 09 2f 2a 20 | 44 65 6c 65 74 65 20 72 |;..../* |Delete r|
|00003b40| 65 66 65 72 65 6e 63 65 | 73 20 74 6f 20 74 68 69 |eference|s to thi|
|00003b50| 73 20 70 73 65 75 64 6f | 2d 64 65 76 69 63 65 2e |s pseudo|-device.|
|00003b60| 20 2a 2f 0a 09 09 56 4e | 5f 52 45 4c 45 28 76 70 | */...VN|_RELE(vp|
|00003b70| 29 3b 09 09 2f 2a 20 43 | 68 75 63 6b 20 74 68 65 |);../* C|huck the|
|00003b80| 20 76 6e 6f 64 65 2e 20 | 2a 2f 0a 09 09 66 70 2d | vnode. |*/...fp-|
|00003b90| 3e 66 5f 63 6f 75 6e 74 | 20 3d 20 30 3b 09 2f 2a |>f_count| = 0;./*|
|00003ba0| 20 43 68 75 63 6b 20 74 | 68 65 20 66 69 6c 65 20 | Chuck t|he file |
|00003bb0| 73 74 72 75 63 74 75 72 | 65 2e 20 2a 2f 0a 09 09 |structur|e. */...|
|00003bc0| 63 72 66 72 65 65 28 66 | 70 2d 3e 66 5f 63 72 65 |crfree(f|p->f_cre|
|00003bd0| 64 29 3b 0a 09 09 2f 2a | 20 44 75 70 20 74 68 65 |d);.../*| Dup the|
|00003be0| 20 66 69 6c 65 20 64 65 | 73 63 72 69 70 74 6f 72 | file de|scriptor|
|00003bf0| 2e 20 2a 2f 0a 09 09 64 | 75 70 69 74 28 75 2e 75 |. */...d|upit(u.u|
|00003c00| 5f 72 2e 72 5f 76 61 6c | 31 2c 20 77 66 70 2c 20 |_r.r_val|1, wfp, |
|00003c10| 75 2e 75 5f 70 6f 66 69 | 6c 65 5b 6d 69 6e 6f 72 |u.u_pofi|le[minor|
|00003c20| 28 64 65 76 29 5d 29 3b | 0a 09 09 2a 76 70 70 20 |(dev)]);|...*vpp |
|00003c30| 3d 20 28 73 74 72 75 63 | 74 20 76 6e 6f 64 65 20 |= (struc|t vnode |
|00003c40| 2a 29 77 66 70 2d 3e 66 | 5f 64 61 74 61 3b 09 2f |*)wfp->f|_data;./|
|00003c50| 2a 20 6e 65 65 64 65 64 | 3f 20 2a 2f 0a 09 09 72 |* needed|? */...r|
|00003c60| 65 74 75 72 6e 20 28 30 | 29 3b 0a 09 7d 0a 0a 09 |eturn (0|);..}...|
|00003c70| 2f 2a 0a 09 20 2a 20 6e | 6f 77 20 68 61 76 65 20 |/*.. * n|ow have |
|00003c80| 61 20 72 65 67 75 6c 61 | 72 20 76 6e 6f 64 65 2e |a regula|r vnode.|
|00003c90| 0a 09 20 2a 2f 0a 09 65 | 72 72 6f 72 20 3d 20 30 |.. */..e|rror = 0|
|00003ca0| 3b 0a 09 77 76 70 20 3d | 20 28 73 74 72 75 63 74 |;..wvp =| (struct|
|00003cb0| 20 76 6e 6f 64 65 20 2a | 29 77 66 70 2d 3e 66 5f | vnode *|)wfp->f_|
|00003cc0| 64 61 74 61 3b 0a 0a 09 | 2f 2a 0a 09 20 2a 20 53 |data;...|/*.. * S|
|00003cd0| 69 6e 63 65 20 77 65 27 | 72 65 20 6f 70 65 6e 69 |ince we'|re openi|
|00003ce0| 6e 67 20 61 20 66 69 6c | 65 20 61 67 61 69 6e 2c |ng a fil|e again,|
|00003cf0| 20 77 65 20 72 75 6e 20 | 74 68 72 6f 75 67 68 20 | we run |through |
|00003d00| 61 6c 6c 20 74 68 65 0a | 09 20 2a 20 70 65 72 6d |all the.|. * perm|
|00003d10| 69 73 73 69 6f 6e 20 63 | 68 65 63 6b 73 20 73 6f |ission c|hecks so|
|00003d20| 20 74 68 69 73 20 63 61 | 6e 27 74 20 62 65 20 75 | this ca|n't be u|
|00003d30| 73 65 64 20 61 73 20 61 | 20 6c 6f 6f 70 68 6f 6c |sed as a| loophol|
|00003d40| 65 20 74 6f 0a 09 20 2a | 20 67 65 74 20 61 63 63 |e to.. *| get acc|
|00003d50| 65 73 73 20 74 6f 20 61 | 20 66 69 6c 65 20 77 65 |ess to a| file we|
|00003d60| 20 73 68 6f 75 6c 64 6e | 27 74 20 68 61 76 65 2e | shouldn|'t have.|
|00003d70| 20 20 28 47 52 4f 54 29 | 0a 09 20 2a 2f 0a 09 69 |  (GROT)|.. */..i|
|00003d80| 66 20 28 6d 6f 64 65 20 | 26 20 46 52 45 41 44 20 |f (mode |& FREAD |
|00003d90| 26 26 20 28 65 72 72 6f | 72 20 3d 20 56 4f 50 5f |&& (erro|r = VOP_|
|00003da0| 41 43 43 45 53 53 28 77 | 76 70 2c 20 56 52 45 41 |ACCESS(w|vp, VREA|
|00003db0| 44 2c 20 75 2e 75 5f 63 | 72 65 64 29 29 29 0a 09 |D, u.u_c|red)))..|
|00003dc0| 09 67 6f 74 6f 20 62 61 | 64 3b 0a 09 69 66 20 28 |.goto ba|d;..if (|
|00003dd0| 6d 6f 64 65 20 26 20 28 | 46 57 52 49 54 45 7c 46 |mode & (|FWRITE|F|
|00003de0| 54 52 55 4e 43 29 29 20 | 7b 0a 09 09 69 66 20 28 |TRUNC)) |{...if (|
|00003df0| 76 70 2d 3e 76 5f 74 79 | 70 65 20 3d 3d 20 56 44 |vp->v_ty|pe == VD|
|00003e00| 49 52 29 20 7b 0a 09 09 | 09 65 72 72 6f 72 20 3d |IR) {...|.error =|
|00003e10| 20 45 49 53 44 49 52 3b | 0a 09 09 09 67 6f 74 6f | EISDIR;|....goto|
|00003e20| 20 62 61 64 3b 0a 09 09 | 7d 0a 09 09 69 66 20 28 | bad;...|}...if (|
|00003e30| 28 65 72 72 6f 72 20 3d | 20 56 4f 50 5f 41 43 43 |(error =| VOP_ACC|
|00003e40| 45 53 53 28 77 76 70 2c | 20 56 57 52 49 54 45 2c |ESS(wvp,| VWRITE,|
|00003e50| 20 75 2e 75 5f 63 72 65 | 64 29 29 29 0a 09 09 09 | u.u_cre|d)))....|
|00003e60| 67 6f 74 6f 20 62 61 64 | 3b 0a 09 7d 0a 0a 09 2f |goto bad|;..}.../|
|00003e70| 2a 0a 09 20 2a 20 54 68 | 65 20 66 69 6c 65 20 6d |*.. * Th|e file m|
|00003e80| 75 73 74 20 61 6c 77 61 | 79 73 20 65 78 69 73 74 |ust alwa|ys exist|
|00003e90| 2c 20 73 6f 20 77 65 20 | 64 6f 6e 27 74 20 65 76 |, so we |don't ev|
|00003ea0| 65 6e 20 62 6f 74 68 65 | 72 20 74 65 73 74 69 6e |en bothe|r testin|
|00003eb0| 67 0a 09 20 2a 20 66 6f | 72 20 69 74 73 20 70 72 |g.. * fo|r its pr|
|00003ec0| 65 73 65 6e 63 65 2e 0a | 09 20 2a 2f 0a 09 69 66 |esence..|. */..if|
|00003ed0| 20 28 28 6d 6f 64 65 20 | 26 20 28 46 43 52 45 41 | ((mode |& (FCREA|
|00003ee0| 54 7c 46 45 58 43 4c 29 | 29 20 3d 3d 20 28 46 43 |T|FEXCL)|) == (FC|
|00003ef0| 52 45 41 54 7c 46 45 58 | 43 4c 29 29 20 7b 0a 09 |REAT|FEX|CL)) {..|
|00003f00| 09 65 72 72 6f 72 20 3d | 20 45 45 58 49 53 54 3b |.error =| EEXIST;|
|00003f10| 0a 09 09 67 6f 74 6f 20 | 62 61 64 3b 0a 09 7d 0a |...goto |bad;..}.|
|00003f20| 0a 09 2f 2a 0a 09 20 2a | 20 54 68 69 73 20 6d 61 |../*.. *| This ma|
|00003f30| 79 20 6e 6f 74 20 6d 61 | 6b 65 20 61 6e 79 20 73 |y not ma|ke any s|
|00003f40| 65 6e 73 65 2c 20 62 75 | 74 20 49 27 6d 20 70 61 |ense, bu|t I'm pa|
|00003f50| 72 61 6e 6f 69 64 20 61 | 6e 64 20 66 69 67 75 72 |ranoid a|nd figur|
|00003f60| 65 20 74 68 61 74 0a 09 | 20 2a 20 69 74 27 73 20 |e that..| * it's |
|00003f70| 70 72 6f 62 61 62 6c 79 | 20 61 6e 20 65 72 72 6f |probably| an erro|
|00003f80| 72 2e 0a 09 20 2a 2f 0a | 09 69 66 20 28 6d 6f 64 |r... */.|.if (mod|
|00003f90| 65 20 26 20 46 54 52 55 | 4e 43 29 20 7b 0a 09 09 |e & FTRU|NC) {...|
|00003fa0| 65 72 72 6f 72 20 3d 20 | 45 42 55 53 59 3b 0a 09 |error = |EBUSY;..|
|00003fb0| 09 67 6f 74 6f 20 62 61 | 64 3b 0a 09 7d 0a 0a 09 |.goto ba|d;..}...|
|00003fc0| 2f 2a 20 43 61 6c 6c 20 | 74 68 65 20 64 65 76 69 |/* Call |the devi|
|00003fd0| 63 65 2d 73 70 65 63 69 | 66 69 63 20 6f 70 65 6e |ce-speci|fic open|
|00003fe0| 20 72 6f 75 74 69 6e 65 | 2c 20 69 66 20 61 6e 79 | routine|, if any|
|00003ff0| 2e 20 2a 2f 0a 09 76 6d | 6f 64 65 20 3d 20 6d 6f |. */..vm|ode = mo|
|00004000| 64 65 20 26 20 7e 28 46 | 43 52 45 41 54 20 7c 20 |de & ~(F|CREAT | |
|00004010| 46 45 58 43 4c 29 3b 0a | 09 69 66 20 28 77 76 70 |FEXCL);.|.if (wvp|
|00004020| 2d 3e 76 5f 74 79 70 65 | 20 21 3d 20 56 52 45 47 |->v_type| != VREG|
|00004030| 20 26 26 0a 09 09 09 28 | 65 72 72 6f 72 20 3d 20 | &&....(|error = |
|00004040| 56 4f 50 5f 4f 50 45 4e | 28 26 77 76 70 2c 20 76 |VOP_OPEN|(&wvp, v|
|00004050| 6d 6f 64 65 2c 20 75 2e | 75 5f 63 72 65 64 29 29 |mode, u.|u_cred))|
|00004060| 20 21 3d 20 30 29 0a 09 | 09 67 6f 74 6f 20 62 61 | != 0)..|.goto ba|
|00004070| 64 3b 0a 0a 09 2f 2a 0a | 09 20 2a 20 4d 61 64 65 |d;.../*.|. * Made|
|00004080| 20 69 74 20 74 68 69 73 | 20 66 61 72 2c 20 6e 6f | it this| far, no|
|00004090| 77 20 72 65 74 75 72 6e | 20 74 68 65 20 6f 74 68 |w return| the oth|
|000040a0| 65 72 20 76 6e 6f 64 65 | 20 62 61 63 6b 20 75 70 |er vnode| back up|
|000040b0| 20 74 68 65 0a 09 20 2a | 20 63 61 6c 6c 20 63 68 | the.. *| call ch|
|000040c0| 61 69 6e 20 66 6f 72 20 | 69 6e 73 65 72 74 69 6f |ain for |insertio|
|000040d0| 6e 20 69 6e 74 6f 20 74 | 68 65 20 66 69 6c 65 20 |n into t|he file |
|000040e0| 74 61 62 6c 65 20 65 6e | 74 72 79 2e 0a 09 20 2a |table en|try... *|
|000040f0| 2f 0a 09 56 4e 5f 52 45 | 4c 45 28 76 70 29 3b 09 |/..VN_RE|LE(vp);.|
|00004100| 09 2f 2a 20 57 65 20 64 | 6f 6e 27 74 20 6e 65 65 |./* We d|on't nee|
|00004110| 64 20 74 68 69 73 20 61 | 6e 79 6d 6f 72 65 2e 20 |d this a|nymore. |
|00004120| 2a 2f 0a 09 77 76 70 2d | 3e 76 5f 63 6f 75 6e 74 |*/..wvp-|>v_count|
|00004130| 2b 2b 3b 0a 09 2a 76 70 | 70 20 3d 20 77 76 70 3b |++;..*vp|p = wvp;|
|00004140| 0a 09 72 65 74 75 72 6e | 20 28 30 29 3b 0a 0a 62 |..return| (0);..b|
|00004150| 61 64 3a 0a 09 72 65 74 | 75 72 6e 20 28 65 72 72 |ad:..ret|urn (err|
|00004160| 6f 72 29 3b 0a 7d 0a 0a | 23 65 6c 73 65 09 2f 2a |or);.}..|#else./*|
|00004170| 20 21 20 4e 46 53 20 2a | 2f 0a 0a 66 64 6f 70 65 | ! NFS *|/..fdope|
|00004180| 6e 28 64 65 76 2c 20 6d | 6f 64 65 29 0a 64 65 76 |n(dev, m|ode).dev|
|00004190| 5f 74 20 64 65 76 3b 0a | 69 6e 74 20 6d 6f 64 65 |_t dev;.|int mode|
|000041a0| 3b 0a 7b 0a 09 73 74 72 | 75 63 74 20 66 69 6c 65 |;.{..str|uct file|
|000041b0| 20 2a 66 70 2c 20 2a 77 | 66 70 3b 0a 09 73 74 72 | *fp, *w|fp;..str|
|000041c0| 75 63 74 20 69 6e 6f 64 | 65 20 2a 69 70 2c 20 2a |uct inod|e *ip, *|
|000041d0| 77 69 70 3b 0a 09 69 6e | 74 20 72 77 6d 6f 64 65 |wip;..in|t rwmode|
|000041e0| 2c 20 65 72 72 6f 72 3b | 0a 0a 09 2f 2a 20 74 68 |, error;|.../* th|
|000041f0| 69 73 20 63 68 65 63 6b | 20 61 64 64 65 64 20 62 |is check| added b|
|00004200| 79 20 41 44 52 20 2a 2f | 0a 09 69 66 20 28 6d 69 |y ADR */|..if (mi|
|00004210| 6e 6f 72 28 64 65 76 29 | 20 3e 3d 20 4e 4f 46 49 |nor(dev)| >= NOFI|
|00004220| 4c 45 29 09 2f 2a 20 73 | 61 6e 69 74 79 20 63 68 |LE)./* s|anity ch|
|00004230| 65 63 6b 20 2a 2f 0a 09 | 09 72 65 74 75 72 6e 20 |eck */..|.return |
|00004240| 28 45 4e 58 49 4f 29 3b | 0a 0a 09 2f 2a 0a 09 20 |(ENXIO);|.../*.. |
|00004250| 2a 20 4e 6f 74 65 20 74 | 68 65 20 68 6f 72 72 69 |* Note t|he horri|
|00004260| 64 20 6b 6c 75 64 67 65 | 20 68 65 72 65 3a 20 75 |d kludge| here: u|
|00004270| 2e 75 5f 72 2e 72 5f 76 | 61 6c 31 20 63 6f 6e 74 |.u_r.r_v|al1 cont|
|00004280| 61 69 6e 73 20 74 68 65 | 20 76 61 6c 75 65 0a 09 |ains the| value..|
|00004290| 20 2a 20 6f 66 20 74 68 | 65 20 6e 65 77 20 66 69 | * of th|e new fi|
|000042a0| 6c 65 20 64 65 73 63 72 | 69 70 74 6f 72 2c 20 77 |le descr|iptor, w|
|000042b0| 68 69 63 68 20 68 61 73 | 20 6e 6f 74 20 62 65 65 |hich has| not bee|
|000042c0| 6e 20 64 69 73 74 75 72 | 62 65 64 20 73 69 6e 63 |n distur|bed sinc|
|000042d0| 65 0a 09 20 2a 20 69 74 | 20 77 61 73 20 61 6c 6c |e.. * it| was all|
|000042e0| 6f 63 61 74 65 64 2e 0a | 09 20 2a 2f 0a 09 69 66 |ocated..|. */..if|
|000042f0| 20 28 28 66 70 20 3d 20 | 67 65 74 66 28 75 2e 75 | ((fp = |getf(u.u|
|00004300| 5f 72 2e 72 5f 76 61 6c | 31 29 29 20 3d 3d 20 4e |_r.r_val|1)) == N|
|00004310| 55 4c 4c 29 0a 09 09 72 | 65 74 75 72 6e 20 28 75 |ULL)...r|eturn (u|
|00004320| 2e 75 5f 65 72 72 6f 72 | 29 3b 0a 0a 09 69 66 20 |.u_error|);...if |
|00004330| 28 28 77 66 70 20 3d 20 | 67 65 74 66 28 6d 69 6e |((wfp = |getf(min|
|00004340| 6f 72 28 64 65 76 29 29 | 29 20 3d 3d 20 4e 55 4c |or(dev))|) == NUL|
|00004350| 4c 29 0a 09 09 72 65 74 | 75 72 6e 20 28 75 2e 75 |L)...ret|urn (u.u|
|00004360| 5f 65 72 72 6f 72 29 3b | 0a 0a 09 2f 2a 0a 09 20 |_error);|.../*.. |
|00004370| 2a 20 57 65 20 6d 75 73 | 74 20 65 78 70 6c 69 63 |* We mus|t explic|
|00004380| 69 74 6c 79 20 74 65 73 | 74 20 66 6f 72 20 74 68 |itly tes|t for th|
|00004390| 69 73 20 63 61 73 65 20 | 62 65 63 61 75 73 65 20 |is case |because |
|000043a0| 75 66 61 6c 6c 6f 63 28 | 29 20 6d 61 79 0a 09 20 |ufalloc(|) may.. |
|000043b0| 2a 20 68 61 76 65 20 61 | 6c 6c 6f 63 61 74 65 64 |* have a|llocated|
|000043c0| 20 75 73 20 74 68 65 20 | 73 61 6d 65 20 66 69 6c | us the |same fil|
|000043d0| 65 20 64 65 73 72 69 70 | 74 6f 72 20 77 65 20 61 |e desrip|tor we a|
|000043e0| 72 65 20 72 65 66 65 72 | 72 69 6e 67 0a 09 20 2a |re refer|ring.. *|
|000043f0| 20 74 6f 2c 20 69 66 20 | 74 68 65 20 70 72 6f 63 | to, if |the proc|
|00004400| 63 65 73 73 20 72 65 66 | 65 72 72 65 64 20 74 6f |cess ref|erred to|
|00004410| 20 61 6e 20 69 6e 76 61 | 6c 69 64 20 28 63 6c 6f | an inva|lid (clo|
|00004420| 73 65 64 29 20 64 65 73 | 63 72 69 70 74 6f 72 2e |sed) des|criptor.|
|00004430| 0a 09 20 2a 20 4f 72 64 | 69 6e 61 72 69 6c 79 20 |.. * Ord|inarily |
|00004440| 74 68 69 73 20 77 6f 75 | 6c 64 20 62 65 20 63 61 |this wou|ld be ca|
|00004450| 75 67 68 74 20 62 79 20 | 67 65 74 66 28 29 2c 20 |ught by |getf(), |
|00004460| 62 75 74 20 62 79 20 74 | 68 65 20 74 69 6d 65 20 |but by t|he time |
|00004470| 77 65 0a 09 20 2a 20 72 | 65 61 63 68 20 74 68 69 |we.. * r|each thi|
|00004480| 73 20 72 6f 75 74 69 6e | 65 20 75 5f 70 6f 66 69 |s routin|e u_pofi|
|00004490| 6c 65 5b 6d 69 6e 6f 72 | 28 64 65 76 29 5d 20 63 |le[minor|(dev)] c|
|000044a0| 6f 75 6c 64 20 61 6c 72 | 65 61 64 79 20 62 65 20 |ould alr|eady be |
|000044b0| 73 65 74 0a 09 20 2a 20 | 74 6f 20 70 6f 69 6e 74 |set.. * |to point|
|000044c0| 20 74 6f 20 6f 75 72 20 | 66 69 6c 65 20 73 74 72 | to our |file str|
|000044d0| 75 63 74 2e 0a 09 20 2a | 2f 0a 09 69 66 20 28 66 |uct... *|/..if (f|
|000044e0| 70 20 3d 3d 20 77 66 70 | 29 0a 09 09 72 65 74 75 |p == wfp|)...retu|
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|00004680| 09 2f 2a 20 41 44 52 3a | 20 42 75 67 20 66 69 78 |./* ADR:| Bug fix|
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|00005260| 64 20 6b 6c 75 64 67 65 | 20 68 65 72 65 3a 20 75 |d kludge| here: u|
|00005270| 2e 75 5f 72 2e 72 5f 76 | 61 6c 31 20 63 6f 6e 74 |.u_r.r_v|al1 cont|
|00005280| 61 69 6e 73 20 74 68 65 | 20 76 61 6c 75 65 0a 09 |ains the| value..|
|00005290| 20 2a 20 6f 66 20 74 68 | 65 20 6e 65 77 20 66 69 | * of th|e new fi|
|000052a0| 6c 65 20 64 65 73 63 72 | 69 70 74 6f 72 2c 20 77 |le descr|iptor, w|
|000052b0| 68 69 63 68 20 68 61 73 | 20 6e 6f 74 20 62 65 65 |hich has| not bee|
|000052c0| 6e 20 64 69 73 74 75 72 | 62 65 64 20 73 69 6e 63 |n distur|bed sinc|
|000052d0| 65 0a 09 20 2a 20 69 74 | 20 77 61 73 20 61 6c 6c |e.. * it| was all|
|000052e0| 6f 63 61 74 65 64 2e 0a | 09 20 2a 2f 0a 09 69 66 |ocated..|. */..if|
|000052f0| 20 28 28 66 70 20 3d 20 | 67 65 74 66 28 75 2e 75 | ((fp = |getf(u.u|
|00005300| 5f 72 2e 72 5f 76 61 6c | 31 29 29 20 3d 3d 20 4e |_r.r_val|1)) == N|
|00005310| 55 4c 4c 29 0a 09 09 72 | 65 74 75 72 6e 20 28 75 |ULL)...r|eturn (u|
|00005320| 2e 75 5f 65 72 72 6f 72 | 29 3b 0a 0a 09 69 66 20 |.u_error|);...if |
|00005330| 28 28 77 66 70 20 3d 20 | 67 65 74 66 28 6d 69 6e |((wfp = |getf(min|
|00005340| 6f 72 28 64 65 76 29 29 | 29 20 3d 3d 20 4e 55 4c |or(dev))|) == NUL|
|00005350| 4c 29 0a 09 09 72 65 74 | 75 72 6e 20 28 75 2e 75 |L)...ret|urn (u.u|
|00005360| 5f 65 72 72 6f 72 29 3b | 0a 0a 09 2f 2a 0a 09 20 |_error);|.../*.. |
|00005370| 2a 20 57 65 20 6d 75 73 | 74 20 65 78 70 6c 69 63 |* We mus|t explic|
|00005380| 69 74 6c 79 20 74 65 73 | 74 20 66 6f 72 20 74 68 |itly tes|t for th|
|00005390| 69 73 20 63 61 73 65 20 | 62 65 63 61 75 73 65 20 |is case |because |
|000053a0| 75 66 61 6c 6c 6f 63 28 | 29 20 6d 61 79 0a 09 20 |ufalloc(|) may.. |
|000053b0| 2a 20 68 61 76 65 20 61 | 6c 6c 6f 63 61 74 65 64 |* have a|llocated|
|000053c0| 20 75 73 20 74 68 65 20 | 73 61 6d 65 20 66 69 6c | us the |same fil|
|000053d0| 65 20 64 65 73 72 69 70 | 74 6f 72 20 77 65 20 61 |e desrip|tor we a|
|000053e0| 72 65 20 72 65 66 65 72 | 72 69 6e 67 0a 09 20 2a |re refer|ring.. *|
|000053f0| 20 74 6f 2c 20 69 66 20 | 74 68 65 20 70 72 6f 63 | to, if |the proc|
|00005400| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005410| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005420| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005430| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005440| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005450| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005460| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005470| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005480| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005490| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000054a0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000054b0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000054c0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000054d0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000054e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000054f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005500| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005510| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005520| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005530| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005540| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005550| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005560| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005570| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005580| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005590| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000055a0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000055b0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000055c0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000055d0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000055e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000055f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005600| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005610| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005620| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005630| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005640| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005650| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005660| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005670| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005680| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005690| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000056a0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000056b0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000056c0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000056d0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000056e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000056f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005700| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005710| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005720| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005730| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005740| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005750| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005760| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005770| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005780| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005790| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000057a0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000057b0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000057c0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000057d0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000057e0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|000057f0| 00 00 00 00 00 00 00 00 | 00 00 00 00 00 00 00 00 |........|........|
|00005800| 57 65 20 6d 75 73 74 20 | 65 78 70 6c 69 63 69 74 |We must |explicit|
|00005810| 6c 79 20 74 65 73 74 20 | 66 6f 72 20 74 68 69 73 |ly test |for this|
|00005820| 20 63 61 73 65 20 62 65 | 63 61 75 73 65 20 75 66 | case be|cause uf|
|00005830| 61 6c 6c 6f 63 28 29 20 | 6d 61 79 0a 09 20 2a 20 |alloc() |may.. * |
|00005840| 68 61 76 65 20 61 6c 6c | 6f 63 61 74 65 64 20 75 |have all|ocated u|
|00005850| 73 20 74 68 65 20 73 61 | 6d 65 20 66 69 6c 65 20 |s the sa|me file |
|00005860| 64 65 73 72 69 70 74 6f | 72 20 77 65 20 61 72 65 |desripto|r we are|
|00005870| 20 72 65 66 65 72 72 69 | 6e 67 0a 09 20 2a 20 74 | referri|ng.. * t|
|00005880| 6f 2c 20 69 66 20 74 68 | 65 20 70 72 6f 63 63 65 |o, if th|e procce|
|00005890| 73 73 20 72 65 66 65 72 | 72 65 64 20 74 6f 20 61 |ss refer|red to a|
|000058a0| 6e 20 69 6e 76 61 6c 69 | 64 20 28 63 6c 6f 73 65 |n invali|d (close|
|000058b0| 64 29 20 64 65 73 63 72 | 69 70 74 6f 72 2e 0a 09 |d) descr|iptor...|
|000058c0| 20 2a 20 4f 72 64 69 6e | 61 72 69 6c 79 20 74 68 | * Ordin|arily th|
|000058d0| 69 73 20 77 6f 75 6c 64 | 20 62 65 20 63 61 75 67 |is would| be caug|
|000058e0| 68 74 20 62 79 20 67 65 | 74 66 28 29 2c 20 62 75 |ht by ge|tf(), bu|
|000058f0| 74 20 62 79 20 74 68 65 | 20 74 69 6d 65 20 77 65 |t by the| time we|
|00005900| 0a 09 20 2a 20 72 65 61 | 63 68 20 74 68 69 73 20 |.. * rea|ch this |
|00005910| 72 6f 75 74 69 6e 65 20 | 75 5f 70 6f 66 69 6c 65 |routine |u_pofile|
|00005920| 5b 6d 69 6e 6f 72 28 64 | 65 76 29 5d 20 63 6f 75 |[minor(d|ev)] cou|
|00005930| 6c 64 20 61 6c 72 65 61 | 64 79 20 62 65 20 73 65 |ld alrea|dy be se|
|00005940| 74 0a 09 20 2a 20 74 6f | 20 70 6f 69 6e 74 20 74 |t.. * to| point t|
|00005950| 6f 20 6f 75 72 20 66 69 | 6c 65 20 73 74 72 75 63 |o our fi|le struc|
|00005960| 74 2e 0a 09 20 2a 2f 0a | 09 69 66 20 28 66 70 20 |t... */.|.if (fp |
|00005970| 3d 3d 20 77 66 70 29 0a | 09 09 72 65 74 75 72 6e |== wfp).|..return|
|00005980| 20 28 45 42 41 44 46 29 | 3b 0a 0a 09 76 70 20 3d | (EBADF)|;...vp =|
|00005990| 20 2a 76 70 70 3b 0a 0a | 09 2f 2a 0a 09 20 2a 20 | *vpp;..|./*.. * |
|000059a0| 46 61 6b 65 20 61 20 60 | 60 64 75 70 28 29 27 27 |Fake a `|`dup()''|
|000059b0| 20 73 79 73 20 63 61 6c | 6c 20 69 66 20 69 74 20 | sys cal|l if it |
|000059c0| 69 73 6e 27 74 20 61 20 | 76 6e 6f 64 65 2e 0a 09 |isn't a |vnode...|
|000059d0| 20 2a 2f 0a 09 69 66 20 | 28 77 66 70 2d 3e 66 5f | */..if |(wfp->f_|
|000059e0| 74 79 70 65 20 21 3d 20 | 44 54 59 50 45 5f 56 4e |type != |DTYPE_VN|
|000059f0| 4f 44 45 29 20 7b 0a 09 | 09 2f 2a 0a 09 09 20 2a |ODE) {..|./*... *|
|00005a00| 20 43 68 65 63 6b 20 74 | 68 61 74 20 74 68 65 20 | Check t|hat the |
|00005a10| 6d 6f 64 65 20 74 68 65 | 20 66 69 6c 65 20 69 73 |mode the| file is|
|00005a20| 20 62 65 69 6e 67 20 6f | 70 65 6e 65 64 0a 09 09 | being o|pened...|
|00005a30| 20 2a 20 66 6f 72 20 69 | 73 20 63 6f 6e 73 69 73 | * for i|s consis|
|00005a40| 74 65 6e 74 20 77 69 74 | 68 20 74 68 65 20 6d 6f |tent wit|h the mo|
|00005a50| 64 65 20 6f 66 20 74 68 | 65 20 65 78 69 73 74 69 |de of th|e existi|
|00005a60| 6e 67 0a 09 09 20 2a 20 | 64 65 73 63 72 69 70 74 |ng... * |descript|
|00005a70| 6f 72 2e 20 54 68 69 73 | 20 69 73 6e 27 74 20 61 |or. This| isn't a|
|00005a80| 73 20 63 6c 65 61 6e 20 | 61 73 20 69 74 20 73 68 |s clean |as it sh|
|00005a90| 6f 75 6c 64 20 62 65 2c | 0a 09 09 20 2a 20 62 75 |ould be,|... * bu|
|00005aa0| 74 20 74 68 69 73 20 65 | 6e 74 69 72 65 20 64 72 |t this e|ntire dr|
|00005ab0| 69 76 65 72 20 69 73 20 | 61 20 72 65 61 6c 20 6b |iver is |a real k|
|00005ac0| 6c 75 64 67 65 20 61 6e | 79 77 61 79 2e 0a 09 09 |ludge an|yway....|
|00005ad0| 20 2a 2f 0a 09 09 72 77 | 6d 6f 64 65 20 3d 20 6d | */...rw|mode = m|
|00005ae0| 6f 64 65 20 26 20 28 46 | 52 45 41 44 7c 46 57 52 |ode & (F|READ|FWR|
|00005af0| 49 54 45 29 3b 0a 09 09 | 69 66 20 28 28 77 66 70 |ITE);...|if ((wfp|
|00005b00| 2d 3e 66 5f 66 6c 61 67 | 20 26 20 72 77 6d 6f 64 |->f_flag| & rwmod|
|00005b10| 65 29 20 21 3d 20 72 77 | 6d 6f 64 65 29 0a 09 09 |e) != rw|mode)...|
|00005b20| 09 72 65 74 75 72 6e 20 | 28 45 41 43 43 45 53 29 |.return |(EACCES)|
|00005b30| 3b 0a 0a 09 09 2f 2a 20 | 44 65 6c 65 74 65 20 72 |;..../* |Delete r|
|00005b40| 65 66 65 72 65 6e 63 65 | 73 20 74 6f 20 74 68 69 |eference|s to thi|
|00005b50| 73 20 70 73 65 75 64 6f | 2d 64 65 76 69 63 65 2e |s pseudo|-device.|
|00005b60| 20 2a 2f 0a 09 09 56 4e | 5f 52 45 4c 45 28 76 70 | */...VN|_RELE(vp|
|00005b70| 29 3b 09 09 2f 2a 20 43 | 68 75 63 6b 20 74 68 65 |);../* C|huck the|
|00005b80| 20 76 6e 6f 64 65 2e 20 | 2a 2f 0a 09 09 66 70 2d | vnode. |*/...fp-|
|00005b90| 3e 66 5f 63 6f 75 6e 74 | 20 3d 20 30 3b 09 2f 2a |>f_count| = 0;./*|
|00005ba0| 20 43 68 75 63 6b 20 74 | 68 65 20 66 69 6c 65 20 | Chuck t|he file |
|00005bb0| 73 74 72 75 63 74 75 72 | 65 2e 20 2a 2f 0a 09 09 |structur|e. */...|
|00005bc0| 63 72 66 72 65 65 28 66 | 70 2d 3e 66 5f 63 72 65 |crfree(f|p->f_cre|
|00005bd0| 64 29 3b 0a 09 09 2f 2a | 20 44 75 70 20 74 68 65 |d);.../*| Dup the|
|00005be0| 20 66 69 6c 65 20 64 65 | 73 63 72 69 70 74 6f 72 | file de|scriptor|
|00005bf0| 2e 20 2a 2f 0a 09 09 64 | 75 70 69 74 28 75 2e 75 |. */...d|upit(u.u|
|00005c00| 5f 72 2e 72 5f 76 61 6c | 31 2c 20 77 66 70 2c 20 |_r.r_val|1, wfp, |
|00005c10| 75 2e 75 5f 70 6f 66 69 | 6c 65 5b 6d 69 6e 6f 72 |u.u_pofi|le[minor|
|00005c20| 28 64 65 76 29 5d 29 3b | 0a 09 09 2a 76 70 70 20 |(dev)]);|...*vpp |
|00005c30| 3d 20 28 73 74 72 75 63 | 74 20 76 6e 6f 64 65 20 |= (struc|t vnode |
|00005c40| 2a 29 77 66 70 2d 3e 66 | 5f 64 61 74 61 3b 09 2f |*)wfp->f|_data;./|
|00005c50| 2a 20 6e 65 65 64 65 64 | 3f 20 2a 2f 0a 09 09 72 |* needed|? */...r|
|00005c60| 65 74 75 72 6e 20 28 30 | 29 3b 0a 09 7d 0a 0a 09 |eturn (0|);..}...|
|00005c70| 2f 2a 0a 09 20 2a 20 6e | 6f 77 20 68 61 76 65 20 |/*.. * n|ow have |
|00005c80| 61 20 72 65 67 75 6c 61 | 72 20 76 6e 6f 64 65 2e |a regula|r vnode.|
|00005c90| 0a 09 20 2a 2f 0a 09 65 | 72 72 6f 72 20 3d 20 30 |.. */..e|rror = 0|
|00005ca0| 3b 0a 09 77 76 70 20 3d | 20 28 73 74 72 75 63 74 |;..wvp =| (struct|
|00005cb0| 20 76 6e 6f 64 65 20 2a | 29 77 66 70 2d 3e 66 5f | vnode *|)wfp->f_|
|00005cc0| 64 61 74 61 3b 0a 0a 09 | 2f 2a 0a 09 20 2a 20 53 |data;...|/*.. * S|
|00005cd0| 69 6e 63 65 20 77 65 27 | 72 65 20 6f 70 65 6e 69 |ince we'|re openi|
|00005ce0| 6e 67 20 61 20 66 69 6c | 65 20 61 67 61 69 6e 2c |ng a fil|e again,|
|00005cf0| 20 77 65 20 72 75 6e 20 | 74 68 72 6f 75 67 68 20 | we run |through |
|00005d00| 61 6c 6c 20 74 68 65 0a | 09 20 2a 20 70 65 72 6d |all the.|. * perm|
|00005d10| 69 73 73 69 6f 6e 20 63 | 68 65 63 6b 73 20 73 6f |ission c|hecks so|
|00005d20| 20 74 68 69 73 20 63 61 | 6e 27 74 20 62 65 20 75 | this ca|n't be u|
|00005d30| 73 65 64 20 61 73 20 61 | 20 6c 6f 6f 70 68 6f 6c |sed as a| loophol|
|00005d40| 65 20 74 6f 0a 09 20 2a | 20 67 65 74 20 61 63 63 |e to.. *| get acc|
|00005d50| 65 73 73 20 74 6f 20 61 | 20 66 69 6c 65 20 77 65 |ess to a| file we|
|00005d60| 20 73 68 6f 75 6c 64 6e | 27 74 20 68 61 76 65 2e | shouldn|'t have.|
|00005d70| 20 20 28 47 52 4f 54 29 | 0a 09 20 2a 2f 0a 09 69 |  (GROT)|.. */..i|
|00005d80| 66 20 28 6d 6f 64 65 20 | 26 20 46 52 45 41 44 20 |f (mode |& FREAD |
|00005d90| 26 26 20 28 65 72 72 6f | 72 20 3d 20 56 4f 50 5f |&& (erro|r = VOP_|
|00005da0| 41 43 43 45 53 53 28 77 | 76 70 2c 20 56 52 45 41 |ACCESS(w|vp, VREA|
|00005db0| 44 2c 20 75 2e 75 5f 63 | 72 65 64 29 29 29 0a 09 |D, u.u_c|red)))..|
|00005dc0| 09 67 6f 74 6f 20 62 61 | 64 3b 0a 09 69 66 20 28 |.goto ba|d;..if (|
|00005dd0| 6d 6f 64 65 20 26 20 28 | 46 57 52 49 54 45 7c 46 |mode & (|FWRITE|F|
|00005de0| 54 52 55 4e 43 29 29 20 | 7b 0a 09 09 69 66 20 28 |TRUNC)) |{...if (|
|00005df0| 76 70 2d 3e 76 5f 74 79 | 70 65 20 3d 3d 20 56 44 |vp->v_ty|pe == VD|
|00005e00| 49 52 29 20 7b 0a 09 09 | 09 65 72 72 6f 72 20 3d |IR) {...|.error =|
|00005e10| 20 45 49 53 44 49 52 3b | 0a 09 09 09 67 6f 74 6f | EISDIR;|....goto|
|00005e20| 20 62 61 64 3b 0a 09 09 | 7d 0a 09 09 69 66 20 28 | bad;...|}...if (|
|00005e30| 28 65 72 72 6f 72 20 3d | 20 56 4f 50 5f 41 43 43 |(error =| VOP_ACC|
|00005e40| 45 53 53 28 77 76 70 2c | 20 56 57 52 49 54 45 2c |ESS(wvp,| VWRITE,|
|00005e50| 20 75 2e 75 5f 63 72 65 | 64 29 29 29 0a 09 09 09 | u.u_cre|d)))....|
|00005e60| 67 6f 74 6f 20 62 61 64 | 3b 0a 09 7d 0a 0a 09 2f |goto bad|;..}.../|
|00005e70| 2a 0a 09 20 2a 20 54 68 | 65 20 66 69 6c 65 20 6d |*.. * Th|e file m|
|00005e80| 75 73 74 20 61 6c 77 61 | 79 73 20 65 78 69 73 74 |ust alwa|ys exist|
|00005e90| 2c 20 73 6f 20 77 65 20 | 64 6f 6e 27 74 20 65 76 |, so we |don't ev|
|00005ea0| 65 6e 20 62 6f 74 68 65 | 72 20 74 65 73 74 69 6e |en bothe|r testin|
|00005eb0| 67 0a 09 20 2a 20 66 6f | 72 20 69 74 73 20 70 72 |g.. * fo|r its pr|
|00005ec0| 65 73 65 6e 63 65 2e 0a | 09 20 2a 2f 0a 09 69 66 |esence..|. */..if|
|00005ed0| 20 28 28 6d 6f 64 65 20 | 26 20 28 46 43 52 45 41 | ((mode |& (FCREA|
|00005ee0| 54 7c 46 45 58 43 4c 29 | 29 20 3d 3d 20 28 46 43 |T|FEXCL)|) == (FC|
|00005ef0| 52 45 41 54 7c 46 45 58 | 43 4c 29 29 20 7b 0a 09 |REAT|FEX|CL)) {..|
|00005f00| 09 65 72 72 6f 72 20 3d | 20 45 45 58 49 53 54 3b |.error =| EEXIST;|
|00005f10| 0a 09 09 67 6f 74 6f 20 | 62 61 64 3b 0a 09 7d 0a |...goto |bad;..}.|
|00005f20| 0a 09 2f 2a 0a 09 20 2a | 20 54 68 69 73 20 6d 61 |../*.. *| This ma|
|00005f30| 79 20 6e 6f 74 20 6d 61 | 6b 65 20 61 6e 79 20 73 |y not ma|ke any s|
|00005f40| 65 6e 73 65 2c 20 62 75 | 74 20 49 27 6d 20 70 61 |ense, bu|t I'm pa|
|00005f50| 72 61 6e 6f 69 64 20 61 | 6e 64 20 66 69 67 75 72 |ranoid a|nd figur|
|00005f60| 65 20 74 68 61 74 0a 09 | 20 2a 20 69 74 27 73 20 |e that..| * it's |
|00005f70| 70 72 6f 62 61 62 6c 79 | 20 61 6e 20 65 72 72 6f |probably| an erro|
|00005f80| 72 2e 0a 09 20 2a 2f 0a | 09 69 66 20 28 6d 6f 64 |r... */.|.if (mod|
|00005f90| 65 20 26 20 46 54 52 55 | 4e 43 29 20 7b 0a 09 09 |e & FTRU|NC) {...|
|00005fa0| 65 72 72 6f 72 20 3d 20 | 45 42 55 53 59 3b 0a 09 |error = |EBUSY;..|
|00005fb0| 09 67 6f 74 6f 20 62 61 | 64 3b 0a 09 7d 0a 0a 09 |.goto ba|d;..}...|
|00005fc0| 2f 2a 20 43 61 6c 6c 20 | 74 68 65 20 64 65 76 69 |/* Call |the devi|
|00005fd0| 63 65 2d 73 70 65 63 69 | 66 69 63 20 6f 70 65 6e |ce-speci|fic open|
|00005fe0| 20 72 6f 75 74 69 6e 65 | 2c 20 69 66 20 61 6e 79 | routine|, if any|
|00005ff0| 2e 20 2a 2f 0a 09 76 6d | 6f 64 65 20 3d 20 6d 6f |. */..vm|ode = mo|
+--------+-------------------------+-------------------------+--------+--------+