source: buchla-68k/libcio/fsinit.c@ 6262b5c

Last change on this file since 6262b5c was 6262b5c, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Added include files for global functions and variables.
  • Property mode set to 100644
File size: 4.1 KB
Line 
1/*
2 ============================================================================
3 fsinit.c -- Initialize file system
4 Version 9 -- 1988-01-31 -- D.N. Lynx Crowe
5 ============================================================================
6*/
7
8#define _FS_DEF_ /* define so that stdio.h and io.h get things right */
9
10#include "all.h"
11
12extern int16_t _bpbin, _dirin, _fatin, _dirmod, _fatmod;
13
14int16_t _badfd(void);
15int16_t _noper(void);
16
17int8_t *Stdbufs; /* buffer chain pointer */
18
19int8_t Wrkbuf[BPSEC]; /* sector work buffer */
20
21int32_t Stdbuf[MAXDFILE][BUFSIZL]; /* standard buffers */
22
23FILE Cbuffs[NSTREAMS]; /* stream file control table */
24
25struct fcb _fcbtab[MAXDFILE]; /* fcb table */
26
27struct channel chantab[MAXCHAN]; /* channel table: relates fd's to devices */
28
29#if TBUFFER
30
31/* WARNING: this ONLY works for 512 byte sectors, 9 sectors per track */
32
33int16_t _b_tbuf[9][256]; /* the track buffer */
34
35int16_t _b_trak; /* current track */
36int16_t _b_side; /* current side */
37int16_t _b_sect; /* current sector */
38int16_t _b_tsec; /* current base sector of current track */
39
40#endif
41
42/*
43
44*/
45
46/*
47 ============================================================================
48 _badfd() -- set "bad fd" error
49 ============================================================================
50*/
51
52int16_t _badfd(void)
53{
54 errno = EBADF; /* set bad fd code */
55 return(FAILURE); /* return with an error indication */
56}
57
58/*
59 ============================================================================
60 _noper() -- null return with no error condition
61 ============================================================================
62*/
63
64int16_t _noper(void)
65{
66 return(SUCCESS); /* return with a non-error indication */
67}
68
69/*
70
71*/
72
73/*
74 ============================================================================
75 InitCH() -- Initialize chantab structure entry
76 ============================================================================
77*/
78
79void InitCH(struct channel *cp, int8_t rdi, int8_t wri, int8_t ioi, int8_t ski, int16_t (*cfp)(), io_arg charg)
80{
81 cp->c_read = rdi;
82 cp->c_write = wri;
83 cp->c_ioctl = ioi;
84 cp->c_seek = ski;
85 cp->c_close = cfp;
86 cp->c_arg = charg;
87}
88
89/*
90 ============================================================================
91 Init_CB() -- Initialize Cbuff structure entry
92 ============================================================================
93*/
94
95void Init_CB(FILE *fp, int8_t unit, int8_t flags, int32_t *bufad, int16_t bufsize)
96{
97 fp->_bp = (int8_t *)0L;
98 fp->_bend = (int8_t *)0L;
99 fp->_buff = (int8_t *)bufad;
100 fp->_flags = flags;
101 fp->_unit = unit;
102 fp->_bytbuf = 0;
103 fp->_buflen = bufsize;
104};
105
106/*
107
108*/
109
110/*
111 ============================================================================
112 InitFS() -- Initialize file system
113 ============================================================================
114*/
115
116void InitFS(void)
117{
118 register int16_t i;
119
120 memset(_fcbtab, 0, sizeof _fcbtab); /* clear fcb table */
121 memsetw(Stdbuf, 0, sizeof Stdbuf / 2); /* clear buffers */
122
123 Init_CB(stdin, _BUSY, 0, (int8_t *)0L, BUFSIZ); /* stdin */
124 Init_CB(stdout, _BUSY, 1, (int8_t *)0L, 1); /* stdout */
125 Init_CB(stderr, _BUSY, 2, (int8_t *)0L, 1); /* stderr */
126
127 for (i = 3; i < NSTREAMS; i++)
128 Init_CB(&Cbuffs[i], 0, 0, (int8_t *)0L, 0);
129
130 Stdbuf[0][0] = 0L; /* initialize the buffer list */
131
132 for (i = 1; i < MAXDFILE; i++)
133 Stdbuf[i][0] = (int32_t)Stdbuf[i-1];
134
135 Stdbufs = Stdbuf[MAXDFILE-1];
136
137 InitCH(&chantab[0], 2, 0, 1, 0, _noper, (io_arg)CON_DEV ); /* 0 - stdin */
138 InitCH(&chantab[1], 0, 2, 1, 0, _noper, (io_arg)CON_DEV ); /* 1 - stdout */
139 InitCH(&chantab[2], 0, 2, 1, 0, _noper, (io_arg)CON_DEV ); /* 2 - stderr */
140
141 for (i = 3; i < MAXCHAN; i++) /* 3..MAXCHAN-1 - not preassigned */
142 InitCH(&chantab[i], 0, 0, 0, 0, _badfd, (io_arg)0L );
143
144 _bpbin = FALSE; /* BPB isn't in memory */
145 _dirin = FALSE; /* directory isn't in memory */
146 _fatin = FALSE; /* FAT isn't in memory */
147 _fatmod = FALSE; /* FAT hasn't been changed */
148 _dirmod = FALSE; /* directory hasn't been changed */
149
150#if TBUFFER
151 _b_trak = -1; /* no track in the buffer */
152 _b_side = -1; /* ... */
153#endif
154}
155
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