[f40a309] | 1 | /*
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| 2 | ============================================================================
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| 3 | fsinit.c -- Initialize file system
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| 4 | Version 9 -- 1988-01-31 -- D.N. Lynx Crowe
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| 5 | ============================================================================
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| 6 | */
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| 7 |
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[b28a12e] | 8 | #include "ram.h"
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[f40a309] | 9 |
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[7258c6a] | 10 | int8_t *Stdbufs; /* buffer chain pointer */
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[f40a309] | 11 |
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[7258c6a] | 12 | int8_t Wrkbuf[BPSEC]; /* sector work buffer */
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[f40a309] | 13 |
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[7258c6a] | 14 | int32_t Stdbuf[MAXDFILE][BUFSIZL]; /* standard buffers */
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[f40a309] | 15 |
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| 16 | FILE Cbuffs[NSTREAMS]; /* stream file control table */
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| 17 |
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| 18 | struct fcb _fcbtab[MAXDFILE]; /* fcb table */
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| 19 |
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| 20 | struct channel chantab[MAXCHAN]; /* channel table: relates fd's to devices */
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| 21 |
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| 22 | #if TBUFFER
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| 23 |
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| 24 | /* WARNING: this ONLY works for 512 byte sectors, 9 sectors per track */
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| 25 |
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[7258c6a] | 26 | int16_t _b_tbuf[9][256]; /* the track buffer */
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[f40a309] | 27 |
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[7258c6a] | 28 | int16_t _b_trak; /* current track */
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| 29 | int16_t _b_side; /* current side */
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| 30 | int16_t _b_sect; /* current sector */
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| 31 | int16_t _b_tsec; /* current base sector of current track */
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[f40a309] | 32 |
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| 33 | #endif
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| 34 |
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| 35 | /*
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| 36 | ============================================================================
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[4a17aeb] | 37 | _badfio() -- set "bad fd" error on I/O
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[f40a309] | 38 | ============================================================================
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| 39 | */
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| 40 |
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[4a17aeb] | 41 | int16_t _badfio(io_arg arg, int8_t *buff, int16_t len)
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[f40a309] | 42 | {
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| 43 | errno = EBADF; /* set bad fd code */
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| 44 | return(FAILURE); /* return with an error indication */
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| 45 | }
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| 46 |
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| 47 | /*
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| 48 | ============================================================================
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[4a17aeb] | 49 | _badfc() -- set "bad fd" error on close
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[f40a309] | 50 | ============================================================================
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| 51 | */
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| 52 |
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[4a17aeb] | 53 | int16_t _badfc(io_arg arg)
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| 54 | {
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| 55 | errno = EBADF; /* set bad fd code */
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| 56 | return(FAILURE); /* return with an error indication */
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| 57 | }
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| 58 |
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| 59 | /*
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| 60 | ============================================================================
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| 61 | _nopo() -- null open with no error condition
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| 62 | ============================================================================
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| 63 | */
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| 64 |
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| 65 | int16_t _nopo(int8_t *name, int16_t flag, int16_t mode, struct channel *chp, struct devtabl *dp)
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| 66 | {
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| 67 | return(SUCCESS); /* return with a non-error indication */
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| 68 | }
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| 69 |
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| 70 | /*
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| 71 | ============================================================================
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| 72 | _nopc() -- null close with no error condition
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| 73 | ============================================================================
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| 74 | */
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| 75 |
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| 76 | int16_t _nopc(io_arg arg)
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[f40a309] | 77 | {
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| 78 | return(SUCCESS); /* return with a non-error indication */
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| 79 | }
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| 80 |
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| 81 | /*
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| 82 | ============================================================================
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| 83 | InitCH() -- Initialize chantab structure entry
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| 84 | ============================================================================
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| 85 | */
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| 86 |
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[4a17aeb] | 87 | void InitCH(struct channel *cp, int8_t rdi, int8_t wri, int8_t ioi, int8_t ski, chclo cfp, io_arg charg)
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[f40a309] | 88 | {
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| 89 | cp->c_read = rdi;
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| 90 | cp->c_write = wri;
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| 91 | cp->c_ioctl = ioi;
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| 92 | cp->c_seek = ski;
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| 93 | cp->c_close = cfp;
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| 94 | cp->c_arg = charg;
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| 95 | }
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| 96 |
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| 97 | /*
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| 98 | ============================================================================
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| 99 | Init_CB() -- Initialize Cbuff structure entry
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| 100 | ============================================================================
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| 101 | */
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| 102 |
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[33b5477] | 103 | void Init_CB(FILE *fp, int8_t flags, int8_t unit, int32_t *bufad, int16_t bufsize)
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[f40a309] | 104 | {
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[7258c6a] | 105 | fp->_bp = (int8_t *)0L;
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| 106 | fp->_bend = (int8_t *)0L;
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| 107 | fp->_buff = (int8_t *)bufad;
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[f40a309] | 108 | fp->_flags = flags;
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| 109 | fp->_unit = unit;
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| 110 | fp->_bytbuf = 0;
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| 111 | fp->_buflen = bufsize;
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| 112 | };
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| 113 |
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| 114 | /*
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| 115 | ============================================================================
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| 116 | InitFS() -- Initialize file system
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| 117 | ============================================================================
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| 118 | */
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| 119 |
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[0580615] | 120 | void InitFS(void)
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[f40a309] | 121 | {
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[7258c6a] | 122 | register int16_t i;
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[f40a309] | 123 |
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| 124 | memset(_fcbtab, 0, sizeof _fcbtab); /* clear fcb table */
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| 125 | memsetw(Stdbuf, 0, sizeof Stdbuf / 2); /* clear buffers */
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| 126 |
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[7258c6a] | 127 | Init_CB(stdin, _BUSY, 0, (int8_t *)0L, BUFSIZ); /* stdin */
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| 128 | Init_CB(stdout, _BUSY, 1, (int8_t *)0L, 1); /* stdout */
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| 129 | Init_CB(stderr, _BUSY, 2, (int8_t *)0L, 1); /* stderr */
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[f40a309] | 130 |
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| 131 | for (i = 3; i < NSTREAMS; i++)
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[7258c6a] | 132 | Init_CB(&Cbuffs[i], 0, 0, (int8_t *)0L, 0);
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[f40a309] | 133 |
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| 134 | Stdbuf[0][0] = 0L; /* initialize the buffer list */
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| 135 |
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| 136 | for (i = 1; i < MAXDFILE; i++)
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[7258c6a] | 137 | Stdbuf[i][0] = (int32_t)Stdbuf[i-1];
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[f40a309] | 138 |
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| 139 | Stdbufs = Stdbuf[MAXDFILE-1];
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| 140 |
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[4a17aeb] | 141 | InitCH(&chantab[0], 2, 0, 1, 0, _nopc, (io_arg)CON_DEV ); /* 0 - stdin */
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| 142 | InitCH(&chantab[1], 0, 2, 1, 0, _nopc, (io_arg)CON_DEV ); /* 1 - stdout */
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| 143 | InitCH(&chantab[2], 0, 2, 1, 0, _nopc, (io_arg)CON_DEV ); /* 2 - stderr */
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[f40a309] | 144 |
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| 145 | for (i = 3; i < MAXCHAN; i++) /* 3..MAXCHAN-1 - not preassigned */
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[4a17aeb] | 146 | InitCH(&chantab[i], 0, 0, 0, 0, _badfc, (io_arg)0L );
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[f40a309] | 147 |
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| 148 | _bpbin = FALSE; /* BPB isn't in memory */
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| 149 | _dirin = FALSE; /* directory isn't in memory */
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| 150 | _fatin = FALSE; /* FAT isn't in memory */
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| 151 | _fatmod = FALSE; /* FAT hasn't been changed */
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| 152 | _dirmod = FALSE; /* directory hasn't been changed */
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| 153 |
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| 154 | #if TBUFFER
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| 155 | _b_trak = -1; /* no track in the buffer */
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| 156 | _b_side = -1; /* ... */
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| 157 | #endif
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| 158 | }
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[6262b5c] | 159 |
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