usr.bin/mail/def.h

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)def.h       8.4 (Berkeley) 4/20/95
  30  *
  31  * $FreeBSD: src/usr.bin/mail/def.h,v 1.4.6.4 2003/01/06 05:46:03 mikeh Exp $
  32  * $DragonFly: src/usr.bin/mail/def.h,v 1.3 2004/09/08 03:01:11 joerg Exp $
  33  */
  34
  35 /*
  36  * Mail -- a mail program
  37  *
  38  * Author: Kurt Shoens (UCB) March 25, 1978
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/stat.h>
  43
  44 #include <ctype.h>
  45 #include <err.h>
  46 #include <paths.h>
  47 #include <signal.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <termios.h>
  52 #include <time.h>
  53 #include <unistd.h>
  54
  55 #include "pathnames.h"
  56
  57 #define APPEND                          /* New mail goes to end of mailbox */
  58
  59 #define ESCAPE          '~'             /* Default escape for sending */
  60 #define NMLSIZE         1024            /* max names in a message list */
  61 #define PATHSIZE        MAXPATHLEN      /* Size of pathnames throughout */
  62 #define HSHSIZE         59              /* Hash size for aliases and vars */
  63 #define LINESIZE        BUFSIZ          /* max readable line width */
  64 #define STRINGSIZE      ((unsigned)128) /* Dynamic allocation units */
  65 #define MAXARGC         1024            /* Maximum list of raw strings */
  66 #define MAXEXP          25              /* Maximum expansion of aliases */
  67
  68 #define equal(a, b)     (strcmp(a,b)==0)/* A nice function to string compare */
  69
  70 struct message {
  71         short   m_flag;                 /* flags, see below */
  72         short   m_offset;               /* offset in block of message */
  73         long    m_block;                /* block number of this message */
  74         long    m_size;                 /* Bytes in the message */
  75         long    m_lines;                /* Lines in the message */
  76 };
  77
  78 /*
  79  * flag bits.
  80  */
  81
  82 #define MUSED           (1<<0)          /* entry is used, but this bit isn't */
  83 #define MDELETED        (1<<1)          /* entry has been deleted */
  84 #define MSAVED          (1<<2)          /* entry has been saved */
  85 #define MTOUCH          (1<<3)          /* entry has been noticed */
  86 #define MPRESERVE       (1<<4)          /* keep entry in sys mailbox */
  87 #define MMARK           (1<<5)          /* message is marked! */
  88 #define MODIFY          (1<<6)          /* message has been modified */
  89 #define MNEW            (1<<7)          /* message has never been seen */
  90 #define MREAD           (1<<8)          /* message has been read sometime. */
  91 #define MSTATUS         (1<<9)          /* message status has changed */
  92 #define MBOX            (1<<10)         /* Send this to mbox, regardless */
  93
  94 /*
  95  * Given a file address, determine the block number it represents.
  96  */
  97 #define blockof(off)                    ((int)((off) / 4096))
  98 #define boffsetof(off)                  ((int)((off) % 4096))
  99 #define positionof(block, offset)       ((off_t)(block) * 4096 + (offset))
 100
 101 /*
 102  * Format of the command description table.
 103  * The actual table is declared and initialized
 104  * in lex.c
 105  */
 106 struct cmd {
 107         const   char *c_name;           /* Name of command */
 108         int     (*c_func)();            /* Implementor of the command */
 109         short   c_argtype;              /* Type of arglist (see below) */
 110         short   c_msgflag;              /* Required flags of messages */
 111         short   c_msgmask;              /* Relevant flags of messages */
 112 };
 113
 114 /* Yechh, can't initialize unions */
 115
 116 #define c_minargs c_msgflag             /* Minimum argcount for RAWLIST */
 117 #define c_maxargs c_msgmask             /* Max argcount for RAWLIST */
 118
 119 /*
 120  * Argument types.
 121  */
 122
 123 #define MSGLIST  0              /* Message list type */
 124 #define STRLIST  1              /* A pure string */
 125 #define RAWLIST  2              /* Shell string list */
 126 #define NOLIST   3              /* Just plain 0 */
 127 #define NDMLIST  4              /* Message list, no defaults */
 128
 129 #define P       040             /* Autoprint dot after command */
 130 #define I       0100            /* Interactive command bit */
 131 #define M       0200            /* Legal from send mode bit */
 132 #define W       0400            /* Illegal when read only bit */
 133 #define F       01000           /* Is a conditional command */
 134 #define T       02000           /* Is a transparent command */
 135 #define R       04000           /* Cannot be called from collect */
 136
 137 /*
 138  * Oft-used mask values
 139  */
 140
 141 #define MMNORM          (MDELETED|MSAVED)/* Look at both save and delete bits */
 142 #define MMNDEL          MDELETED        /* Look only at deleted bit */
 143
 144 /*
 145  * Structure used to return a break down of a head
 146  * line (hats off to Bill Joy!)
 147  */
 148
 149 struct headline {
 150         char    *l_from;        /* The name of the sender */
 151         char    *l_tty;         /* His tty string (if any) */
 152         char    *l_date;        /* The entire date string */
 153 };
 154
 155 #define GTO     1               /* Grab To: line */
 156 #define GSUBJECT 2              /* Likewise, Subject: line */
 157 #define GCC     4               /* And the Cc: line */
 158 #define GBCC    8               /* And also the Bcc: line */
 159 #define GREPLYTO 0x10           /* And the Reply-To: line */
 160 #define GINREPLYTO 0x20         /* The In-Reply-To: line */
 161 #define GMASK   (GTO|GSUBJECT|GCC|GBCC|GREPLYTO|GINREPLYTO)
 162                                 /* Mask of places from whence */
 163
 164 #define GNL     0x40            /* Print blank line after */
 165 #define GDEL    0x80            /* Entity removed from list */
 166 #define GCOMMA  0x100           /* detract puts in commas */
 167
 168 /*
 169  * Structure used to pass about the current
 170  * state of the user-typed message header.
 171  */
 172
 173 struct header {
 174         struct  name *h_bcc;            /* Blind carbon copies */
 175         struct  name *h_cc;             /* Carbon copies string */
 176         struct  name *h_smopts;         /* Sendmail options */
 177         struct  name *h_to;             /* Dynamic "To:" string */
 178         char    *h_inreplyto;           /* Reference */
 179         char    *h_replyto;             /* Reply address */
 180         char    *h_subject;             /* Subject string */
 181 };
 182
 183 /*
 184  * Structure of namelist nodes used in processing
 185  * the recipients of mail and aliases and all that
 186  * kind of stuff.
 187  */
 188
 189 struct name {
 190         struct  name *n_flink;          /* Forward link in list. */
 191         struct  name *n_blink;          /* Backward list link */
 192         short   n_type;                 /* From which list it came */
 193         char    *n_name;                /* This fella's name */
 194 };
 195
 196 /*
 197  * Structure of a variable node.  All variables are
 198  * kept on a singly-linked list of these, rooted by
 199  * "variables"
 200  */
 201
 202 struct var {
 203         struct  var *v_link;            /* Forward link to next variable */
 204         char    *v_name;                /* The variable's name */
 205         char    *v_value;               /* And it's current value */
 206 };
 207
 208 struct group {
 209         struct  group *ge_link;         /* Next person in this group */
 210         char    *ge_name;               /* This person's user name */
 211 };
 212
 213 struct grouphead {
 214         struct  grouphead *g_link;      /* Next grouphead in list */
 215         char    *g_name;                /* Name of this group */
 216         struct  group *g_list;          /* Users in group. */
 217 };
 218
 219 /*
 220  * Structure of the hash table of ignored header fields
 221  */
 222 struct ignoretab {
 223         int     i_count;                        /* Number of entries */
 224         struct  ignore {
 225                 struct  ignore *i_link; /* Next ignored field in bucket */
 226                 char    *i_field;       /* This ignored field */
 227         } *i_head[HSHSIZE];
 228 };
 229
 230 /*
 231  * Token values returned by the scanner used for argument lists.
 232  * Also, sizes of scanner-related things.
 233  */
 234
 235 #define TEOL    0                       /* End of the command line */
 236 #define TNUMBER 1                       /* A message number */
 237 #define TDASH   2                       /* A simple dash */
 238 #define TSTRING 3                       /* A string (possibly containing -) */
 239 #define TDOT    4                       /* A "." */
 240 #define TUP     5                       /* An "^" */
 241 #define TDOLLAR 6                       /* A "$" */
 242 #define TSTAR   7                       /* A "*" */
 243 #define TOPEN   8                       /* An '(' */
 244 #define TCLOSE  9                       /* A ')' */
 245 #define TPLUS   10                      /* A '+' */
 246 #define TERROR  11                      /* A lexical error */
 247
 248 #define REGDEP  2                       /* Maximum regret depth. */
 249 #define STRINGLEN       1024            /* Maximum length of string token */
 250
 251 /*
 252  * Constants for conditional commands.  These describe whether
 253  * we should be executing stuff or not.
 254  */
 255
 256 #define CANY            0               /* Execute in send or receive mode */
 257 #define CRCV            1               /* Execute in receive mode only */
 258 #define CSEND           2               /* Execute in send mode only */
 259
 260 /*
 261  * Kludges to handle the change from setexit / reset to setjmp / longjmp
 262  */
 263
 264 #define setexit()       setjmp(srbuf)
 265 #define reset(x)        longjmp(srbuf, x)
 266
 267 /*
 268  * Truncate a file to the last character written. This is
 269  * useful just before closing an old file that was opened
 270  * for read/write.
 271  */
 272 #define trunc(stream) {                                                 \
 273         fflush(stream);                                                 \
 274         ftruncate(fileno(stream), (off_t)ftell(stream));                \
 275 }