1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)def.h 8.4 (Berkeley) 4/20/95 32 * 33 * $FreeBSD$ 34 */ 35 36 /* 37 * Mail -- a mail program 38 * 39 * Author: Kurt Shoens (UCB) March 25, 1978 40 */ 41 42 #include <sys/param.h> 43 #include <sys/stat.h> 44 45 #include <ctype.h> 46 #include <err.h> 47 #include <paths.h> 48 #include <signal.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <termios.h> 53 #include <time.h> 54 #include <unistd.h> 55 56 #include "pathnames.h" 57 58 #define APPEND /* New mail goes to end of mailbox */ 59 60 #define ESCAPE '~' /* Default escape for sending */ 61 #define NMLSIZE 1024 /* max names in a message list */ 62 #define PATHSIZE MAXPATHLEN /* Size of pathnames throughout */ 63 #define HSHSIZE 59 /* Hash size for aliases and vars */ 64 #define LINESIZE BUFSIZ /* max readable line width */ 65 #define STRINGSIZE ((unsigned)128) /* Dynamic allocation units */ 66 #define MAXARGC 1024 /* Maximum list of raw strings */ 67 #define MAXEXP 25 /* Maximum expansion of aliases */ 68 69 #define equal(a, b) (strcmp(a,b)==0)/* A nice function to string compare */ 70 71 struct message { 72 short m_flag; /* flags, see below */ 73 short m_offset; /* offset in block of message */ 74 long m_block; /* block number of this message */ 75 long m_size; /* Bytes in the message */ 76 long m_lines; /* Lines in the message */ 77 }; 78 79 /* 80 * flag bits. 81 */ 82 83 #define MUSED (1<<0) /* entry is used, but this bit isn't */ 84 #define MDELETED (1<<1) /* entry has been deleted */ 85 #define MSAVED (1<<2) /* entry has been saved */ 86 #define MTOUCH (1<<3) /* entry has been noticed */ 87 #define MPRESERVE (1<<4) /* keep entry in sys mailbox */ 88 #define MMARK (1<<5) /* message is marked! */ 89 #define MODIFY (1<<6) /* message has been modified */ 90 #define MNEW (1<<7) /* message has never been seen */ 91 #define MREAD (1<<8) /* message has been read sometime. */ 92 #define MSTATUS (1<<9) /* message status has changed */ 93 #define MBOX (1<<10) /* Send this to mbox, regardless */ 94 95 /* 96 * Given a file address, determine the block number it represents. 97 */ 98 #define blockof(off) ((int)((off) / 4096)) 99 #define boffsetof(off) ((int)((off) % 4096)) 100 #define positionof(block, offset) ((off_t)(block) * 4096 + (offset)) 101 102 /* 103 * Format of the command description table. 104 * The actual table is declared and initialized 105 * in lex.c 106 */ 107 struct cmd { 108 const char *c_name; /* Name of command */ 109 int (*c_func)(void *); /* Implementor of the command */ 110 short c_argtype; /* Type of arglist (see below) */ 111 short c_msgflag; /* Required flags of messages */ 112 short c_msgmask; /* Relevant flags of messages */ 113 }; 114 115 /* Yechh, can't initialize unions */ 116 117 #define c_minargs c_msgflag /* Minimum argcount for RAWLIST */ 118 #define c_maxargs c_msgmask /* Max argcount for RAWLIST */ 119 120 /* 121 * Argument types. 122 */ 123 124 #define MSGLIST 0 /* Message list type */ 125 #define STRLIST 1 /* A pure string */ 126 #define RAWLIST 2 /* Shell string list */ 127 #define NOLIST 3 /* Just plain 0 */ 128 #define NDMLIST 4 /* Message list, no defaults */ 129 130 #define P 040 /* Autoprint dot after command */ 131 #define I 0100 /* Interactive command bit */ 132 #define M 0200 /* Legal from send mode bit */ 133 #define W 0400 /* Illegal when read only bit */ 134 #define F 01000 /* Is a conditional command */ 135 #define T 02000 /* Is a transparent command */ 136 #define R 04000 /* Cannot be called from collect */ 137 138 /* 139 * Oft-used mask values 140 */ 141 142 #define MMNORM (MDELETED|MSAVED)/* Look at both save and delete bits */ 143 #define MMNDEL MDELETED /* Look only at deleted bit */ 144 145 /* 146 * Structure used to return a break down of a head 147 * line (hats off to Bill Joy!) 148 */ 149 150 struct headline { 151 char *l_from; /* The name of the sender */ 152 char *l_tty; /* His tty string (if any) */ 153 char *l_date; /* The entire date string */ 154 }; 155 156 #define GTO 1 /* Grab To: line */ 157 #define GSUBJECT 2 /* Likewise, Subject: line */ 158 #define GCC 4 /* And the Cc: line */ 159 #define GBCC 8 /* And also the Bcc: line */ 160 #define GREPLYTO 0x10 /* And the Reply-To: line */ 161 #define GINREPLYTO 0x20 /* The In-Reply-To: line */ 162 #define GMASK (GTO|GSUBJECT|GCC|GBCC|GREPLYTO|GINREPLYTO) 163 /* Mask of places from whence */ 164 165 #define GNL 0x40 /* Print blank line after */ 166 #define GDEL 0x80 /* Entity removed from list */ 167 #define GCOMMA 0x100 /* detract puts in commas */ 168 169 /* 170 * Structure used to pass about the current 171 * state of the user-typed message header. 172 */ 173 174 struct header { 175 struct name *h_bcc; /* Blind carbon copies */ 176 struct name *h_cc; /* Carbon copies string */ 177 struct name *h_smopts; /* Sendmail options */ 178 struct name *h_to; /* Dynamic "To:" string */ 179 char *h_inreplyto; /* Reference */ 180 char *h_replyto; /* Reply address */ 181 char *h_subject; /* Subject string */ 182 }; 183 184 /* 185 * Structure of namelist nodes used in processing 186 * the recipients of mail and aliases and all that 187 * kind of stuff. 188 */ 189 190 struct name { 191 struct name *n_flink; /* Forward link in list. */ 192 struct name *n_blink; /* Backward list link */ 193 short n_type; /* From which list it came */ 194 char *n_name; /* This fella's name */ 195 }; 196 197 /* 198 * Structure of a variable node. All variables are 199 * kept on a singly-linked list of these, rooted by 200 * "variables" 201 */ 202 203 struct var { 204 struct var *v_link; /* Forward link to next variable */ 205 char *v_name; /* The variable's name */ 206 char *v_value; /* And it's current value */ 207 }; 208 209 struct group { 210 struct group *ge_link; /* Next person in this group */ 211 char *ge_name; /* This person's user name */ 212 }; 213 214 struct grouphead { 215 struct grouphead *g_link; /* Next grouphead in list */ 216 char *g_name; /* Name of this group */ 217 struct group *g_list; /* Users in group. */ 218 }; 219 220 /* 221 * Structure of the hash table of ignored header fields 222 */ 223 struct ignoretab { 224 int i_count; /* Number of entries */ 225 struct ignore { 226 struct ignore *i_link; /* Next ignored field in bucket */ 227 char *i_field; /* This ignored field */ 228 } *i_head[HSHSIZE]; 229 }; 230 231 /* 232 * Token values returned by the scanner used for argument lists. 233 * Also, sizes of scanner-related things. 234 */ 235 236 #define TEOL 0 /* End of the command line */ 237 #define TNUMBER 1 /* A message number */ 238 #define TDASH 2 /* A simple dash */ 239 #define TSTRING 3 /* A string (possibly containing -) */ 240 #define TDOT 4 /* A "." */ 241 #define TUP 5 /* An "^" */ 242 #define TDOLLAR 6 /* A "$" */ 243 #define TSTAR 7 /* A "*" */ 244 #define TOPEN 8 /* An '(' */ 245 #define TCLOSE 9 /* A ')' */ 246 #define TPLUS 10 /* A '+' */ 247 #define TERROR 11 /* A lexical error */ 248 249 #define REGDEP 2 /* Maximum regret depth. */ 250 #define STRINGLEN 1024 /* Maximum length of string token */ 251 252 /* 253 * Constants for conditional commands. These describe whether 254 * we should be executing stuff or not. 255 */ 256 257 #define CANY 0 /* Execute in send or receive mode */ 258 #define CRCV 1 /* Execute in receive mode only */ 259 #define CSEND 2 /* Execute in send mode only */ 260 261 /* 262 * Kludges to handle the change from setexit / reset to setjmp / longjmp 263 */ 264 265 #define setexit() setjmp(srbuf) 266 #define reset(x) longjmp(srbuf, x) 267 268 /* 269 * Truncate a file to the last character written. This is 270 * useful just before closing an old file that was opened 271 * for read/write. 272 */ 273 #define trunc(stream) { \ 274 (void)fflush(stream); \ 275 (void)ftruncate(fileno(stream), ftello(stream)); \ 276 } 277