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1.1 root 1: #
2:
3: #include "local.h"
4: #include <sys/types.h>
5: #include <signal.h>
6: #include <stdio.h>
7:
8: #undef isalpha
9: #undef isdigit
10:
11: /*
12: * Mail -- a mail program
13: *
14: * Commands are:
15: * t <message list> print out these messages
16: * r <message list> reply to messages
17: * m <user list> mail to users (analogous to send)
18: * e <message list> edit messages
19: * c [directory] chdir to dir or home if none
20: * x exit quickly
21: * w <message list> file save messages in file
22: * q quit, save remaining stuff in mbox
23: * d <message list> delete messages
24: * u <message list> undelete messages
25: * h print message headers
26: *
27: * Author: Kurt Shoens (UCB) March 25, 1978
28: */
29:
30:
31: #define ESCAPE '~' /* Default escape for sending */
32: #define NMLSIZE 20 /* max names in a message list */
33: #define PATHSIZE 35 /* Size of pathnames throughout */
34: #define NAMESIZE 20 /* Max size of user name */
35: #define HSHSIZE 19 /* Hash size for aliases and vars */
36: #define HDRFIELDS 3 /* Number of header fields */
37: #define LINESIZE 512 /* max readable line width */
38: #define SCREEN 18 /* screen size in lines (effective) */
39: #define STRINGSIZE ((unsigned) 128)/* Dynamic allocation units */
40: #define MAXARGC 20 /* Maximum list of raw strings */
41: #define NOSTR ((char *) 0) /* Null string pointer */
42: #define equal(a, b) (strcmp(a,b)==0)/* A nice function to string compare */
43:
44: struct message {
45: short m_flag; /* flags, see below */
46: short m_block; /* block number of this message */
47: short m_offset; /* offset in block of message */
48: unsigned m_size; /* Bytes in the message */
49: short m_lines; /* Lines in the message */
50: };
51:
52: /*
53: * flag bits.
54: */
55:
56: #define MUSED 1 /* entry is used, but this bit isn't */
57: #define MDELETED 2 /* entry has been deleted */
58: #define MSAVED 4 /* entry has been saved */
59: #define MTOUCH 8 /* entry has been noticed */
60: #define MPRESERVE 16 /* keep entry in sys mailbox */
61: #define MMARK 32 /* message is marked! */
62: #define MODIFY 64 /* message has been modified */
63:
64: /*
65: * Format of the command description table.
66: * The actual table is declared and initialized
67: * in lex.c
68: */
69:
70: struct cmd {
71: char *c_name; /* Name of command */
72: int (*c_func)(); /* Implementor of the command */
73: short c_argtype; /* Type of arglist (see below) */
74: short c_msgflag; /* Required flags of messages */
75: short c_msgmask; /* Relevant flags of messages */
76: };
77:
78: /* Yechh, can't initialize unions */
79:
80: #define c_minargs c_msgflag /* Minimum argcount for RAWLIST */
81: #define c_maxargs c_msgmask /* Max argcount for RAWLIST */
82:
83: /*
84: * Argument types.
85: */
86:
87: #define MSGLIST 0 /* Message list type */
88: #define STRLIST 1 /* A pure string */
89: #define RAWLIST 2 /* Shell string list */
90: #define NOLIST 3 /* Just plain 0 */
91: #define NDMLIST 4 /* Message list, no defaults */
92:
93: #define P 040 /* Autoprint dot after command */
94: #define I 0100 /* Interactive command bit */
95: #define M 0200 /* Illegal from send mode bit */
96:
97: /*
98: * Oft-used mask values
99: */
100:
101: #define MMNORM (MDELETED|MSAVED)/* Look at both save and delete bits */
102: #define MMNDEL MDELETED /* Look only at deleted bit */
103:
104: /*
105: * Structure used to return a break down of a head
106: * line (hats off to Bill Joy!)
107: */
108:
109: struct headline {
110: char *l_from; /* The name of the sender */
111: char *l_tty; /* His tty string (if any) */
112: char *l_date; /* The entire date string */
113: };
114:
115: #define GTO 1 /* Grab To: line */
116: #define GSUBJECT 2 /* Likewise, Subject: line */
117: #define GCC 4 /* And the Cc: line */
118: #define GBCC 8 /* And also the Bcc: line */
119:
120: /*
121: * Structure used to pass about the current
122: * state of the user-typed message header.
123: */
124:
125: struct header {
126: char *h_to; /* Dynamic "To:" string */
127: char *h_subject; /* Subject string */
128: char *h_cc; /* Carbon copies string */
129: char *h_bcc; /* Blind carbon copies */
130: int h_seq; /* Sequence for optimization */
131: };
132:
133: /*
134: * Structure of namelist nodes used in processing
135: * the recipients of mail and aliases and all that
136: * kind of stuff.
137: */
138:
139: struct name {
140: struct name *n_flink; /* Forward link in list. */
141: struct name *n_blink; /* Backward list link */
142: char *n_name; /* This fella's name */
143: };
144:
145: /*
146: * Structure of a variable node. All variables are
147: * kept on a singly-linked list of these, rooted by
148: * "variables"
149: */
150:
151: struct var {
152: struct var *v_link; /* Forward link to next variable */
153: char *v_name; /* The variable's name */
154: char *v_value; /* And it's current value */
155: };
156:
157: struct group {
158: struct group *ge_link; /* Next person in this group */
159: char *ge_name; /* This person's user name */
160: };
161:
162: struct grouphead {
163: struct grouphead *g_link; /* Next grouphead in list */
164: char *g_name; /* Name of this group */
165: struct group *g_list; /* Users in group. */
166: };
167:
168: #define NIL ((struct name *) 0) /* The nil pointer for namelists */
169: #define NONE ((struct cmd *) 0) /* The nil pointer to command tab */
170: #define NOVAR ((struct var *) 0) /* The nil pointer to variables */
171: #define NOGRP ((struct grouphead *) 0)/* The nil grouphead pointer */
172: #define NOGE ((struct group *) 0) /* The nil group pointer */
173:
174: /*
175: * Token values returned by the scanner used for argument lists.
176: * Also, sizes of scanner-related things.
177: */
178:
179: #define TEOL 0 /* End of the command line */
180: #define TNUMBER 1 /* A message number */
181: #define TDASH 2 /* A simple dash */
182: #define TSTRING 3 /* A string (possibly containing -) */
183: #define TDOT 4 /* A "." */
184: #define TUP 5 /* An "^" */
185: #define TDOLLAR 6 /* A "$" */
186: #define TSTAR 7 /* A "*" */
187: #define TOPEN 8 /* An '(' */
188: #define TCLOSE 9 /* A ')' */
189:
190: #define REGDEP 2 /* Maximum regret depth. */
191: #define STRINGLEN 16 /* Maximum length of string token */
192:
193: /*
194: * Kludges to handle the change from setexit / reset to setjmp / longjmp
195: */
196:
197: #define setexit() setjmp(srbuf)
198: #define reset(x) longjmp(srbuf, x)
199:
200: /*
201: * If we have a system with the vfork() system call, define VFORK
202: * otherwise . . .
203: */
204:
205: #ifndef VFORK
206: #define vfork() fork()
207: #endif
208:
209: /*
210: * Forward declarations of routine types to keep lint and cc happy.
211: */
212:
213: FILE *Fdopen();
214: FILE *collect();
215: FILE *infix();
216: FILE *mesedit();
217: FILE *mespipe();
218: FILE *setinput();
219: char **unpack();
220: char *addto();
221: char *calloc();
222: char *copy();
223: char *copyin();
224: char *detract();
225: char *expand();
226: char *gets();
227: char *hfield();
228: char *index();
229: char *nameof();
230: char *nextword();
231: char *getenv();
232: char *hcontents();
233: char *netmap();
234: char *netname();
235: char *readtty();
236: char *rindex();
237: char *rpair();
238: char *salloc();
239: char *savestr();
240: char *savestr();
241: char *snarf();
242: char *value();
243: char *vcopy();
244: char *yankword();
245: off_t fsize();
246: struct cmd *lex();
247: struct grouphead *findgroup();
248: struct name *cat();
249: struct name *delname();
250: struct name *elide();
251: struct name *extract();
252: struct name *map();
253: struct name *outof();
254: struct name *put();
255: struct name *usermap();
256: struct name *verify();
257: struct var *lookup();
258: unsigned int msize();
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