2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
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15 * This product includes software developed by the University of
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33 * @(#)head.c 8.2 (Berkeley) 4/20/95
34 * $FreeBSD: src/usr.bin/mail/head.c,v 1.1.1.1.14.4 2003/01/06 05:46:03 mikeh Exp $
35 * $DragonFly: src/usr.bin/mail/head.c,v 1.2 2003/06/17 04:29:28 dillon Exp $
42 * Mail -- a mail program
44 * Routines for processing and detecting headlines.
48 * See if the passed line buffer is a mail header.
49 * Return true if yes. Note the extreme pains to
50 * accomodate all funny formats.
59 if (strncmp(linebuf, "From ", 5))
61 parse(linebuf, &hl, parbuf);
62 if (hl.l_from == NULL || hl.l_date == NULL) {
63 fail(linebuf, "No from or date field");
66 if (!isdate(hl.l_date)) {
67 fail(linebuf, "Date field not legal date");
79 const char *linebuf, *reason;
83 if (value("debug") == NULL)
85 fprintf(stderr, "\"%s\"\nnot a header because %s\n", linebuf, reason);
90 * Split a headline into its useful components.
91 * Copy the line into dynamic string space, then set
92 * pointers into the copied line in the passed headline
93 * structure. Actually, it scans.
109 * Skip over "From" first.
111 cp = nextword(cp, word);
112 cp = nextword(cp, word);
114 hl->l_from = copyin(word, &sp);
115 if (cp != NULL && cp[0] == 't' && cp[1] == 't' && cp[2] == 'y') {
116 cp = nextword(cp, word);
117 hl->l_tty = copyin(word, &sp);
120 hl->l_date = copyin(cp, &sp);
124 * Copy the string on the left into the string on the right
125 * and bump the right (reference) string pointer by the length.
126 * Thus, dynamically allocate space in the right string, copying
127 * the left string into it.
137 while ((*cp++ = *src++) != '\0')
144 * Test to see if the passed string is a ctime(3) generated
145 * date string as documented in the manual. The template
146 * below is used as the criterion of correctness.
147 * Also, we check for a possible trailing time zone using
148 * the tmztype template.
150 * If the mail file is created by Sys V (Solaris), there are
151 * no seconds in the time. If the mail is created by another
152 * program such as imapd, it might have timezone as
153 * <-|+>nnnn (-0800 for instance) at the end.
157 * 'A' An upper case char
158 * 'a' A lower case char
161 * 'O' A digit or space
162 * 'p' A punctuation char
163 * 'P' A punctuation char or space
168 static char *date_formats[] = {
169 "Aaa Aaa O0 00:00:00 0000", /* Mon Jan 01 23:59:59 2001 */
170 "Aaa Aaa O0 00:00:00 AAA 0000", /* Mon Jan 01 23:59:59 PST 2001 */
171 "Aaa Aaa O0 00:00:00 0000 p0000", /* Mon Jan 01 23:59:59 2001 -0800 */
172 "Aaa Aaa O0 00:00 0000", /* Mon Jan 01 23:59 2001 */
173 "Aaa Aaa O0 00:00 AAA 0000", /* Mon Jan 01 23:59 PST 2001 */
174 "Aaa Aaa O0 00:00 0000 p0000", /* Mon Jan 01 23:59 2001 -0800 */
184 for(i = 0; date_formats[i] != NULL; i++) {
185 if (cmatch(date, date_formats[i]))
192 * Match the given string (cp) against the given template (tp).
193 * Return 1 if they match, 0 if they don't
200 while (*cp != '\0' && *tp != '\0')
203 if (!islower((unsigned char)*cp++))
207 if (!isupper((unsigned char)*cp++))
215 if (!isdigit((unsigned char)*cp++))
219 if (*cp != ' ' && !isdigit((unsigned char)*cp))
224 if (!ispunct((unsigned char)*cp++))
228 if (*cp != ' ' && !ispunct((unsigned char)*cp))
241 if (*cp != '\0' || *tp != '\0')
247 * Collect a liberal (space, tab delimited) word into the word buffer
248 * passed. Also, return a pointer to the next word following that,
249 * or NULL if none follow.
261 while ((c = *wp++) != '\0' && c != ' ' && c != '\t') {
264 while ((c = *wp++) != '\0' && c != '"')
273 for (; c == ' ' || c == '\t'; c = *wp++)