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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)def.h 8.2 (Berkeley) 3/21/94 34 * $Id: def.h,v 1.6 1994/06/29 05:09:16 deraadt Exp $ 35 */ 36 37 /* 38 * Mail -- a mail program 39 * 40 * Author: Kurt Shoens (UCB) March 25, 1978 41 */ 42 43 #include <sys/param.h> 44 #include <sys/stat.h> 45 #include <sys/time.h> 46 47 #include <signal.h> 48 #include <sgtty.h> 49 #include <unistd.h> 50 #include <stdlib.h> 51 #include <stdio.h> 52 #include <ctype.h> 53 #include <string.h> 54 #include "pathnames.h" 55 56 #define APPEND /* New mail goes to end of mailbox */ 57 58 #define ESCAPE '~' /* Default escape for sending */ 59 #define NMLSIZE 1024 /* max names in a message list */ 60 #define PATHSIZE MAXPATHLEN /* Size of pathnames throughout */ 61 #define HSHSIZE 59 /* Hash size for aliases and vars */ 62 #define LINESIZE BUFSIZ /* max readable line width */ 63 #define STRINGSIZE ((unsigned) 128)/* Dynamic allocation units */ 64 #define MAXARGC 1024 /* Maximum list of raw strings */ 65 #define NOSTR ((char *) 0) /* Null string pointer */ 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_block; /* block number of this message */ 73 short m_offset; /* offset in block of message */ 74 long m_size; /* Bytes in the message */ 75 short 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 offsetof(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 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 GMASK (GTO|GSUBJECT|GCC|GBCC) 160 /* Mask of places from whence */ 161 162 #define GNL 16 /* Print blank line after */ 163 #define GDEL 32 /* Entity removed from list */ 164 #define GCOMMA 64 /* detract puts in commas */ 165 166 /* 167 * Structure used to pass about the current 168 * state of the user-typed message header. 169 */ 170 171 struct header { 172 struct name *h_to; /* Dynamic "To:" string */ 173 char *h_subject; /* Subject string */ 174 struct name *h_cc; /* Carbon copies string */ 175 struct name *h_bcc; /* Blind carbon copies */ 176 struct name *h_smopts; /* Sendmail options */ 177 }; 178 179 /* 180 * Structure of namelist nodes used in processing 181 * the recipients of mail and aliases and all that 182 * kind of stuff. 183 */ 184 185 struct name { 186 struct name *n_flink; /* Forward link in list. */ 187 struct name *n_blink; /* Backward list link */ 188 short n_type; /* From which list it came */ 189 char *n_name; /* This fella's name */ 190 }; 191 192 /* 193 * Structure of a variable node. All variables are 194 * kept on a singly-linked list of these, rooted by 195 * "variables" 196 */ 197 198 struct var { 199 struct var *v_link; /* Forward link to next variable */ 200 char *v_name; /* The variable's name */ 201 char *v_value; /* And it's current value */ 202 }; 203 204 struct group { 205 struct group *ge_link; /* Next person in this group */ 206 char *ge_name; /* This person's user name */ 207 }; 208 209 struct grouphead { 210 struct grouphead *g_link; /* Next grouphead in list */ 211 char *g_name; /* Name of this group */ 212 struct group *g_list; /* Users in group. */ 213 }; 214 215 #define NIL ((struct name *) 0) /* The nil pointer for namelists */ 216 #define NONE ((struct cmd *) 0) /* The nil pointer to command tab */ 217 #define NOVAR ((struct var *) 0) /* The nil pointer to variables */ 218 #define NOGRP ((struct grouphead *) 0)/* The nil grouphead pointer */ 219 #define NOGE ((struct group *) 0) /* The nil group pointer */ 220 221 /* 222 * Structure of the hash table of ignored header fields 223 */ 224 struct ignoretab { 225 int i_count; /* Number of entries */ 226 struct ignore { 227 struct ignore *i_link; /* Next ignored field in bucket */ 228 char *i_field; /* This ignored field */ 229 } *i_head[HSHSIZE]; 230 }; 231 232 /* 233 * Token values returned by the scanner used for argument lists. 234 * Also, sizes of scanner-related things. 235 */ 236 237 #define TEOL 0 /* End of the command line */ 238 #define TNUMBER 1 /* A message number */ 239 #define TDASH 2 /* A simple dash */ 240 #define TSTRING 3 /* A string (possibly containing -) */ 241 #define TDOT 4 /* A "." */ 242 #define TUP 5 /* An "^" */ 243 #define TDOLLAR 6 /* A "$" */ 244 #define TSTAR 7 /* A "*" */ 245 #define TOPEN 8 /* An '(' */ 246 #define TCLOSE 9 /* A ')' */ 247 #define TPLUS 10 /* A '+' */ 248 #define TERROR 11 /* A lexical error */ 249 250 #define REGDEP 2 /* Maximum regret depth. */ 251 #define STRINGLEN 1024 /* Maximum length of string token */ 252 253 /* 254 * Constants for conditional commands. These describe whether 255 * we should be executing stuff or not. 256 */ 257 258 #define CANY 0 /* Execute in send or receive mode */ 259 #define CRCV 1 /* Execute in receive mode only */ 260 #define CSEND 2 /* Execute in send mode only */ 261 262 /* 263 * Kludges to handle the change from setexit / reset to setjmp / longjmp 264 */ 265 266 #define setexit() setjmp(srbuf) 267 #define reset(x) longjmp(srbuf, x) 268 269 /* 270 * Truncate a file to the last character written. This is 271 * useful just before closing an old file that was opened 272 * for read/write. 273 */ 274 #define trunc(stream) { \ 275 (void)fflush(stream); \ 276 (void)ftruncate(fileno(stream), (off_t)ftell(stream)); \ 277 } 278