source: buchla-68k/libcio/fsinit.c@ 411371e

Last change on this file since 411371e was e225e77, checked in by Thomas Lopatic <thomas@…>, 8 years ago

Added missing includes and declarations.
  • Property mode set to 100644
File size: 4.2 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 "biosdefs.h"
11#include "errno.h"
12#include "io.h"
13#include "stdio.h"
14#include "stddefs.h"
15
16#include "memory.h"
17
18extern int16_t _bpbin, _dirin, _fatin, _dirmod, _fatmod;
19
20int16_t _badfd(void);
21int16_t _noper(void);
22
23int8_t *Stdbufs; /* buffer chain pointer */
24
25int8_t Wrkbuf[BPSEC]; /* sector work buffer */
26
27int32_t Stdbuf[MAXDFILE][BUFSIZL]; /* standard buffers */
28
29FILE Cbuffs[NSTREAMS]; /* stream file control table */
30
31struct fcb _fcbtab[MAXDFILE]; /* fcb table */
32
33struct channel chantab[MAXCHAN]; /* channel table: relates fd's to devices */
34
35#if TBUFFER
36
37/* WARNING: this ONLY works for 512 byte sectors, 9 sectors per track */
38
39int16_t _b_tbuf[9][256]; /* the track buffer */
40
41int16_t _b_trak; /* current track */
42int16_t _b_side; /* current side */
43int16_t _b_sect; /* current sector */
44int16_t _b_tsec; /* current base sector of current track */
45
46#endif
47
48/*
49
50*/
51
52/*
53 ============================================================================
54 _badfd() -- set "bad fd" error
55 ============================================================================
56*/
57
58int16_t _badfd(void)
59{
60 errno = EBADF; /* set bad fd code */
61 return(FAILURE); /* return with an error indication */
62}
63
64/*
65 ============================================================================
66 _noper() -- null return with no error condition
67 ============================================================================
68*/
69
70int16_t _noper(void)
71{
72 return(SUCCESS); /* return with a non-error indication */
73}
74
75/*
76
77*/
78
79/*
80 ============================================================================
81 InitCH() -- Initialize chantab structure entry
82 ============================================================================
83*/
84
85void InitCH(struct channel *cp, int8_t rdi, int8_t wri, int8_t ioi, int8_t ski, int16_t (*cfp)(), io_arg charg)
86{
87 cp->c_read = rdi;
88 cp->c_write = wri;
89 cp->c_ioctl = ioi;
90 cp->c_seek = ski;
91 cp->c_close = cfp;
92 cp->c_arg = charg;
93}
94
95/*
96 ============================================================================
97 Init_CB() -- Initialize Cbuff structure entry
98 ============================================================================
99*/
100
101void Init_CB(FILE *fp, int8_t unit, int8_t flags, int32_t *bufad, int16_t bufsize)
102{
103 fp->_bp = (int8_t *)0L;
104 fp->_bend = (int8_t *)0L;
105 fp->_buff = (int8_t *)bufad;
106 fp->_flags = flags;
107 fp->_unit = unit;
108 fp->_bytbuf = 0;
109 fp->_buflen = bufsize;
110};
111
112/*
113
114*/
115
116/*
117 ============================================================================
118 InitFS() -- Initialize file system
119 ============================================================================
120*/
121
122void InitFS(void)
123{
124 register int16_t i;
125
126 memset(_fcbtab, 0, sizeof _fcbtab); /* clear fcb table */
127 memsetw(Stdbuf, 0, sizeof Stdbuf / 2); /* clear buffers */
128
129 Init_CB(stdin, _BUSY, 0, (int8_t *)0L, BUFSIZ); /* stdin */
130 Init_CB(stdout, _BUSY, 1, (int8_t *)0L, 1); /* stdout */
131 Init_CB(stderr, _BUSY, 2, (int8_t *)0L, 1); /* stderr */
132
133 for (i = 3; i < NSTREAMS; i++)
134 Init_CB(&Cbuffs[i], 0, 0, (int8_t *)0L, 0);
135
136 Stdbuf[0][0] = 0L; /* initialize the buffer list */
137
138 for (i = 1; i < MAXDFILE; i++)
139 Stdbuf[i][0] = (int32_t)Stdbuf[i-1];
140
141 Stdbufs = Stdbuf[MAXDFILE-1];
142
143 InitCH(&chantab[0], 2, 0, 1, 0, _noper, (io_arg)CON_DEV ); /* 0 - stdin */
144 InitCH(&chantab[1], 0, 2, 1, 0, _noper, (io_arg)CON_DEV ); /* 1 - stdout */
145 InitCH(&chantab[2], 0, 2, 1, 0, _noper, (io_arg)CON_DEV ); /* 2 - stderr */
146
147 for (i = 3; i < MAXCHAN; i++) /* 3..MAXCHAN-1 - not preassigned */
148 InitCH(&chantab[i], 0, 0, 0, 0, _badfd, (io_arg)0L );
149
150 _bpbin = FALSE; /* BPB isn't in memory */
151 _dirin = FALSE; /* directory isn't in memory */
152 _fatin = FALSE; /* FAT isn't in memory */
153 _fatmod = FALSE; /* FAT hasn't been changed */
154 _dirmod = FALSE; /* directory hasn't been changed */
155
156#if TBUFFER
157 _b_trak = -1; /* no track in the buffer */
158 _b_side = -1; /* ... */
159#endif
160}
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