usr/src/cmd/sh/mode.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  26 /* All Rights Reserved */
  27
  28 #ifndef _MODE_H
  29 #define _MODE_H
  30
  31 /*
  32  *      UNIX shell
  33  */
  34
  35 #include <unistd.h>
  36
  37 #ifdef pdp11
  38 typedef char BOOL;
  39 #else
  40 typedef short BOOL;
  41 #endif
  42
  43 #define BYTESPERWORD    (sizeof (char *))
  44 #define ALIGNSIZ        (sizeof (double))
  45 #define NIL     ((char *)0)
  46
  47
  48 /*
  49  * the following nonsense is required
  50  * because casts turn an Lvalue
  51  * into an Rvalue so two cheats
  52  * are necessary, one for each context.
  53  */
  54 #define Rcheat(a)       ((int)(a))
  55
  56
  57 /* address puns for storage allocation */
  58 typedef union
  59 {
  60         struct forknod  *_forkptr;
  61         struct comnod   *_comptr;
  62         struct fndnod   *_fndptr;
  63         struct parnod   *_parptr;
  64         struct ifnod    *_ifptr;
  65         struct whnod    *_whptr;
  66         struct fornod   *_forptr;
  67         struct lstnod   *_lstptr;
  68         struct blk      *_blkptr;
  69         struct namnod   *_namptr;
  70         char    *_bytptr;
  71 } address;
  72
  73
  74 /* heap storage */
  75 struct blk
  76 {
  77         struct blk      *word;
  78         char            pad[ALIGNSIZ - sizeof (struct blk *)];
  79 };
  80
  81 /*
  82  * largefile converson hack note.
  83  * the shell uses the *fnxt and *fend pointers when
  84  * parsing a script. However, it was also using the
  85  * difference between them when doing lseeks. Because
  86  * that doesn't work in the largefile world, I have
  87  * added a parallel set of offset counters that need to
  88  * be updated whenever the "buffer" offsets the shell
  89  * uses get changed. Most of this code is in word.c.
  90  * If you change it, have fun...
  91  */
  92
  93 #define BUFFERSIZE      128
  94 struct fileblk
  95 {
  96         int     fdes;
  97         unsigned flin;
  98         BOOL    feof;
  99         unsigned char   fsiz;
 100         unsigned char   *fnxt;
 101         unsigned char   *fend;
 102         off_t           nxtoff;         /* file offset */
 103         off_t           endoff;         /* file offset */
 104         unsigned char   **feval;
 105         struct fileblk  *fstak;
 106         unsigned char   fbuf[BUFFERSIZE];
 107 };
 108
 109 struct tempblk
 110 {
 111         int fdes;
 112         struct tempblk *fstak;
 113 };
 114
 115
 116 /* for files not used with file descriptors */
 117 struct filehdr
 118 {
 119         int     fdes;
 120         unsigned        flin;
 121         BOOL    feof;
 122         unsigned char   fsiz;
 123         unsigned char   *fnxt;
 124         unsigned char   *fend;
 125         off_t           nxtoff;         /* file offset */
 126         off_t           endoff;         /* file offset */
 127         unsigned char   **feval;
 128         struct fileblk  *fstak;
 129         unsigned char   _fbuf[1];
 130 };
 131
 132 struct sysnod
 133 {
 134         char    *sysnam;
 135         int     sysval;
 136 };
 137
 138 /* this node is a proforma for those that follow */
 139 struct trenod
 140 {
 141         int     tretyp;
 142         struct ionod    *treio;
 143 };
 144
 145 /* dummy for access only */
 146 struct argnod
 147 {
 148         struct argnod   *argnxt;
 149         unsigned char   argval[1];
 150 };
 151
 152 struct dolnod
 153 {
 154         struct dolnod   *dolnxt;
 155         int     doluse;
 156         unsigned char   **dolarg;
 157 };
 158
 159 struct forknod
 160 {
 161         int     forktyp;
 162         struct ionod    *forkio;
 163         struct trenod   *forktre;
 164 };
 165
 166 struct comnod
 167 {
 168         int     comtyp;
 169         struct ionod    *comio;
 170         struct argnod   *comarg;
 171         struct argnod   *comset;
 172 };
 173
 174 struct fndnod
 175 {
 176         int     fndtyp;
 177         unsigned char   *fndnam;
 178         struct trenod   *fndval;
 179         int     fndref;
 180 };
 181
 182 struct ifnod
 183 {
 184         int     iftyp;
 185         struct trenod   *iftre;
 186         struct trenod   *thtre;
 187         struct trenod   *eltre;
 188 };
 189
 190 struct whnod
 191 {
 192         int     whtyp;
 193         struct trenod   *whtre;
 194         struct trenod   *dotre;
 195 };
 196
 197 struct fornod
 198 {
 199         int     fortyp;
 200         struct trenod   *fortre;
 201         unsigned char   *fornam;
 202         struct comnod   *forlst;
 203 };
 204
 205 struct swnod
 206 {
 207         int     swtyp;
 208         unsigned char *swarg;
 209         struct regnod   *swlst;
 210 };
 211
 212 struct regnod
 213 {
 214         struct argnod   *regptr;
 215         struct trenod   *regcom;
 216         struct regnod   *regnxt;
 217 };
 218
 219 struct parnod
 220 {
 221         int     partyp;
 222         struct trenod   *partre;
 223 };
 224
 225 struct lstnod
 226 {
 227         int     lsttyp;
 228         struct trenod   *lstlef;
 229         struct trenod   *lstrit;
 230 };
 231
 232 struct ionod
 233 {
 234         int     iofile;
 235         char    *ioname;
 236         char    *iolink;
 237         struct ionod    *ionxt;
 238         struct ionod    *iolst;
 239 };
 240
 241 struct fdsave
 242 {
 243         int org_fd;
 244         int dup_fd;
 245 };
 246
 247
 248 #define         fndptr(x)       ((struct fndnod *)x)
 249 #define         comptr(x)       ((struct comnod *)x)
 250 #define         forkptr(x)      ((struct forknod *)x)
 251 #define         parptr(x)       ((struct parnod *)x)
 252 #define         lstptr(x)       ((struct lstnod *)x)
 253 #define         forptr(x)       ((struct fornod *)x)
 254 #define         whptr(x)        ((struct whnod *)x)
 255 #define         ifptr(x)        ((struct ifnod *)x)
 256 #define         swptr(x)        ((struct swnod *)x)
 257
 258 #endif /* _MODE_H */