1 /* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)def.h 8.3 (Berkeley) 10/25/94 8 */ 9 10 /* 11 * Mail -- a mail program 12 * 13 * Author: Kurt Shoens (UCB) March 25, 1978 14 */ 15 16 #include <sys/param.h> 17 #include <sys/stat.h> 18 #include <sys/time.h> 19 20 #include <signal.h> 21 #include <sgtty.h> 22 #include <unistd.h> 23 #include <stdlib.h> 24 #include <stdio.h> 25 #include <ctype.h> 26 #include <string.h> 27 #include "pathnames.h" 28 29 #define APPEND /* New mail goes to end of mailbox */ 30 31 #define ESCAPE '~' /* Default escape for sending */ 32 #define NMLSIZE 1024 /* max names in a message list */ 33 #define PATHSIZE MAXPATHLEN /* Size of pathnames throughout */ 34 #define HSHSIZE 59 /* Hash size for aliases and vars */ 35 #define LINESIZE BUFSIZ /* max readable line width */ 36 #define STRINGSIZE ((unsigned) 128)/* Dynamic allocation units */ 37 #define MAXARGC 1024 /* Maximum list of raw strings */ 38 #define NOSTR ((char *) 0) /* Null string pointer */ 39 #define MAXEXP 25 /* Maximum expansion of aliases */ 40 41 #define equal(a, b) (strcmp(a,b)==0)/* A nice function to string compare */ 42 43 struct message { 44 short m_flag; /* flags, see below */ 45 short m_offset; /* offset in block of message */ 46 long m_block; /* block number of this message */ 47 long m_size; /* Bytes in the message */ 48 long m_lines; /* Lines in the message */ 49 }; 50 51 /* 52 * flag bits. 53 */ 54 55 #define MUSED (1<<0) /* entry is used, but this bit isn't */ 56 #define MDELETED (1<<1) /* entry has been deleted */ 57 #define MSAVED (1<<2) /* entry has been saved */ 58 #define MTOUCH (1<<3) /* entry has been noticed */ 59 #define MPRESERVE (1<<4) /* keep entry in sys mailbox */ 60 #define MMARK (1<<5) /* message is marked! */ 61 #define MODIFY (1<<6) /* message has been modified */ 62 #define MNEW (1<<7) /* message has never been seen */ 63 #define MREAD (1<<8) /* message has been read sometime. */ 64 #define MSTATUS (1<<9) /* message status has changed */ 65 #define MBOX (1<<10) /* Send this to mbox, regardless */ 66 67 /* 68 * Given a file address, determine the block number it represents. 69 */ 70 #define blockof(off) ((int) ((off) / 4096)) 71 #define offsetof(off) ((int) ((off) % 4096)) 72 #define positionof(block, offset) ((off_t)(block) * 4096 + (offset)) 73 74 /* 75 * Format of the command description table. 76 * The actual table is declared and initialized 77 * in lex.c 78 */ 79 struct cmd { 80 char *c_name; /* Name of command */ 81 int (*c_func)(); /* Implementor of the command */ 82 short c_argtype; /* Type of arglist (see below) */ 83 short c_msgflag; /* Required flags of messages */ 84 short c_msgmask; /* Relevant flags of messages */ 85 }; 86 87 /* Yechh, can't initialize unions */ 88 89 #define c_minargs c_msgflag /* Minimum argcount for RAWLIST */ 90 #define c_maxargs c_msgmask /* Max argcount for RAWLIST */ 91 92 /* 93 * Argument types. 94 */ 95 96 #define MSGLIST 0 /* Message list type */ 97 #define STRLIST 1 /* A pure string */ 98 #define RAWLIST 2 /* Shell string list */ 99 #define NOLIST 3 /* Just plain 0 */ 100 #define NDMLIST 4 /* Message list, no defaults */ 101 102 #define P 040 /* Autoprint dot after command */ 103 #define I 0100 /* Interactive command bit */ 104 #define M 0200 /* Legal from send mode bit */ 105 #define W 0400 /* Illegal when read only bit */ 106 #define F 01000 /* Is a conditional command */ 107 #define T 02000 /* Is a transparent command */ 108 #define R 04000 /* Cannot be called from collect */ 109 110 /* 111 * Oft-used mask values 112 */ 113 114 #define MMNORM (MDELETED|MSAVED)/* Look at both save and delete bits */ 115 #define MMNDEL MDELETED /* Look only at deleted bit */ 116 117 /* 118 * Structure used to return a break down of a head 119 * line (hats off to Bill Joy!) 120 */ 121 122 struct headline { 123 char *l_from; /* The name of the sender */ 124 char *l_tty; /* His tty string (if any) */ 125 char *l_date; /* The entire date string */ 126 }; 127 128 #define GTO 1 /* Grab To: line */ 129 #define GSUBJECT 2 /* Likewise, Subject: line */ 130 #define GCC 4 /* And the Cc: line */ 131 #define GBCC 8 /* And also the Bcc: line */ 132 #define GMASK (GTO|GSUBJECT|GCC|GBCC) 133 /* Mask of places from whence */ 134 135 #define GNL 16 /* Print blank line after */ 136 #define GDEL 32 /* Entity removed from list */ 137 #define GCOMMA 64 /* detract puts in commas */ 138 139 /* 140 * Structure used to pass about the current 141 * state of the user-typed message header. 142 */ 143 144 struct header { 145 struct name *h_to; /* Dynamic "To:" string */ 146 char *h_subject; /* Subject string */ 147 struct name *h_cc; /* Carbon copies string */ 148 struct name *h_bcc; /* Blind carbon copies */ 149 struct name *h_smopts; /* Sendmail options */ 150 }; 151 152 /* 153 * Structure of namelist nodes used in processing 154 * the recipients of mail and aliases and all that 155 * kind of stuff. 156 */ 157 158 struct name { 159 struct name *n_flink; /* Forward link in list. */ 160 struct name *n_blink; /* Backward list link */ 161 short n_type; /* From which list it came */ 162 char *n_name; /* This fella's name */ 163 }; 164 165 /* 166 * Structure of a variable node. All variables are 167 * kept on a singly-linked list of these, rooted by 168 * "variables" 169 */ 170 171 struct var { 172 struct var *v_link; /* Forward link to next variable */ 173 char *v_name; /* The variable's name */ 174 char *v_value; /* And it's current value */ 175 }; 176 177 struct group { 178 struct group *ge_link; /* Next person in this group */ 179 char *ge_name; /* This person's user name */ 180 }; 181 182 struct grouphead { 183 struct grouphead *g_link; /* Next grouphead in list */ 184 char *g_name; /* Name of this group */ 185 struct group *g_list; /* Users in group. */ 186 }; 187 188 #define NIL ((struct name *) 0) /* The nil pointer for namelists */ 189 #define NONE ((struct cmd *) 0) /* The nil pointer to command tab */ 190 #define NOVAR ((struct var *) 0) /* The nil pointer to variables */ 191 #define NOGRP ((struct grouphead *) 0)/* The nil grouphead pointer */ 192 #define NOGE ((struct group *) 0) /* The nil group pointer */ 193 194 /* 195 * Structure of the hash table of ignored header fields 196 */ 197 struct ignoretab { 198 int i_count; /* Number of entries */ 199 struct ignore { 200 struct ignore *i_link; /* Next ignored field in bucket */ 201 char *i_field; /* This ignored field */ 202 } *i_head[HSHSIZE]; 203 }; 204 205 /* 206 * Token values returned by the scanner used for argument lists. 207 * Also, sizes of scanner-related things. 208 */ 209 210 #define TEOL 0 /* End of the command line */ 211 #define TNUMBER 1 /* A message number */ 212 #define TDASH 2 /* A simple dash */ 213 #define TSTRING 3 /* A string (possibly containing -) */ 214 #define TDOT 4 /* A "." */ 215 #define TUP 5 /* An "^" */ 216 #define TDOLLAR 6 /* A "$" */ 217 #define TSTAR 7 /* A "*" */ 218 #define TOPEN 8 /* An '(' */ 219 #define TCLOSE 9 /* A ')' */ 220 #define TPLUS 10 /* A '+' */ 221 #define TERROR 11 /* A lexical error */ 222 223 #define REGDEP 2 /* Maximum regret depth. */ 224 #define STRINGLEN 1024 /* Maximum length of string token */ 225 226 /* 227 * Constants for conditional commands. These describe whether 228 * we should be executing stuff or not. 229 */ 230 231 #define CANY 0 /* Execute in send or receive mode */ 232 #define CRCV 1 /* Execute in receive mode only */ 233 #define CSEND 2 /* Execute in send mode only */ 234 235 /* 236 * Kludges to handle the change from setexit / reset to setjmp / longjmp 237 */ 238 239 #define setexit() setjmp(srbuf) 240 #define reset(x) longjmp(srbuf, x) 241 242 /* 243 * Truncate a file to the last character written. This is 244 * useful just before closing an old file that was opened 245 * for read/write. 246 */ 247 #define trunc(stream) { \ 248 (void)fflush(stream); \ 249 (void)ftruncate(fileno(stream), (long)ftell(stream)); \ 250 } 251