2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)aux.c 8.1 (Berkeley) 6/6/93
30 * $FreeBSD: src/usr.bin/mail/aux.c,v 1.4.6.4 2003/01/06 05:46:03 mikeh Exp $
31 * $DragonFly: src/usr.bin/mail/aux.c,v 1.4 2004/09/08 03:01:11 joerg Exp $
40 * Mail -- a mail program
42 * Auxiliary functions.
45 static char *save2str(char *, char *);
48 * Return a pointer to a dynamic copy of the argument.
54 int size = strlen(str) + 1;
56 if ((new = salloc(size)) != NULL)
57 bcopy(str, new, size);
62 * Make a copy of new argument incorporating old one.
65 save2str(char *str, char *old)
68 int newsize = strlen(str) + 1;
69 int oldsize = old ? strlen(old) + 1 : 0;
71 if ((new = salloc(newsize + oldsize)) != NULL) {
73 bcopy(old, new, oldsize);
74 new[oldsize - 1] = ' ';
76 bcopy(str, new + oldsize, newsize);
82 * Touch the named message by setting its MTOUCH flag.
83 * Touched messages have the effect of not being sent
84 * back to the system mailbox on exit.
87 touch(struct message *mp)
90 if ((mp->m_flag & MREAD) == 0)
91 mp->m_flag |= MREAD|MSTATUS;
95 * Test to see if the passed file name is a directory.
96 * Return true if it is.
103 if (stat(name, &sbuf) < 0)
105 return (S_ISDIR(sbuf.st_mode));
109 * Count the number of arguments in the given string raw list.
112 argcount(char **argv)
116 for (ap = argv; *ap++ != NULL;)
118 return (ap - argv - 1);
122 * Return the desired header line from the passed message
123 * pointer (or NULL if the desired header field is not available).
126 hfield(const char *field, struct message *mp)
129 char linebuf[LINESIZE];
132 char *colon, *oldhfield = NULL;
135 if ((lc = mp->m_lines - 1) < 0)
137 if (readline(ibuf, linebuf, LINESIZE) < 0)
140 if ((lc = gethfield(ibuf, linebuf, lc, &colon)) < 0)
142 if ((hfield = ishfield(linebuf, colon, field)) != NULL)
143 oldhfield = save2str(hfield, oldhfield);
149 * Return the next header field found in the given message.
150 * Return >= 0 if something found, < 0 elsewise.
151 * "colon" is set to point to the colon in the header.
152 * Must deal with \ continuations & other such fraud.
155 gethfield(FILE *f, char *linebuf, int rem, char **colon)
157 char line2[LINESIZE];
164 if ((c = readline(f, linebuf, LINESIZE)) <= 0)
166 for (cp = linebuf; isprint((unsigned char)*cp) && *cp != ' ' && *cp != ':';
169 if (*cp != ':' || cp == linebuf)
172 * I guess we got a headline.
173 * Handle wraparounding
178 while (--cp >= linebuf && (*cp == ' ' || *cp == '\t'))
183 ungetc(c = getc(f), f);
184 if (c != ' ' && c != '\t')
186 if ((c = readline(f, line2, LINESIZE)) < 0)
189 for (cp2 = line2; *cp2 == ' ' || *cp2 == '\t'; cp2++)
192 if (cp + c >= linebuf + LINESIZE - 2)
205 * Check whether the passed line is a header line of
206 * the desired breed. Return the field body, or 0.
210 ishfield(char *linebuf, char *colon, const char *field)
215 if (strcasecmp(linebuf, field) != 0) {
220 for (cp++; *cp == ' ' || *cp == '\t'; cp++)
226 * Copy a string and lowercase the result.
227 * dsize: space left in buffer (including space for NULL)
230 istrncpy(char *dest, const char *src, size_t dsize)
233 strlcpy(dest, src, dsize);
235 *dest++ = tolower((unsigned char)*dest);
239 * The following code deals with input stacking to do source
240 * commands. All but the current file pointer are saved on
244 static int ssp; /* Top of file stack */
246 FILE *s_file; /* File we were in. */
247 int s_cond; /* Saved state of conditionals */
248 int s_loading; /* Loading .mailrc, etc. */
250 #define SSTACK_SIZE 64 /* XXX was NOFILE. */
251 static struct sstack sstack[SSTACK_SIZE];
254 * Pushdown current input file and switch to a new one.
255 * Set the global flag "sourcing" so that others will realize
256 * that they are no longer reading from a tty (in all probability).
259 source(char **arglist)
264 if ((cp = expand(*arglist)) == NULL)
266 if ((fi = Fopen(cp, "r")) == NULL) {
270 if (ssp >= SSTACK_SIZE - 1) {
271 printf("Too much \"sourcing\" going on.\n");
275 sstack[ssp].s_file = input;
276 sstack[ssp].s_cond = cond;
277 sstack[ssp].s_loading = loading;
287 * Pop the current input back to the previous level.
288 * Update the "sourcing" flag as appropriate.
294 printf("\"Source\" stack over-pop.\n");
300 printf("Unmatched \"if\"\n");
302 cond = sstack[ssp].s_cond;
303 loading = sstack[ssp].s_loading;
304 input = sstack[ssp].s_file;
311 * Touch the indicated file.
312 * This is nifty for the shell.
318 struct timeval tv[2];
322 gettimeofday(&tv[0], NULL);
324 TIMESPEC_TO_TIMEVAL(&tv[1], &sb.st_mtimespec);
329 * Get sender's name from this message. If the message has
330 * a bunch of arpanet stuff in it, we may have to skin the name
331 * before returning it.
334 nameof(struct message *mp, int reptype)
338 cp = skin(name1(mp, reptype));
339 if (reptype != 0 || charcount(cp, '!') < 2)
341 cp2 = strrchr(cp, '!');
343 while (cp2 > cp && *cp2 != '!')
351 * Start of a "comment".
355 skip_comment(char *cp)
359 for (; nesting > 0 && *cp; cp++) {
377 * Skin an arpa net address according to the RFC 822 interpretation
383 char *nbuf, *bufend, *cp, *cp2;
384 int c, gotlt, lastsp;
388 if (strchr(name, '(') == NULL && strchr(name, '<') == NULL
389 && strchr(name, ' ') == NULL)
392 /* We assume that length(input) <= length(output) */
393 if ((nbuf = malloc(strlen(name) + 1)) == NULL)
394 err(1, "Out of memory");
398 for (cp = name, cp2 = bufend; (c = *cp++) != '\0'; ) {
401 cp = skip_comment(cp);
407 * Start of a "quoted-string".
408 * Copy it in its entirety.
410 while ((c = *cp) != '\0') {
416 else if ((c = *cp) != '\0') {
425 if (cp[0] == 'a' && cp[1] == 't' && cp[2] == ' ')
426 cp += 3, *cp2++ = '@';
428 if (cp[0] == '@' && cp[1] == ' ')
429 cp += 2, *cp2++ = '@';
443 while ((c = *cp) != '\0' && c != ',') {
446 cp = skip_comment(cp);
448 while ((c = *cp) != '\0') {
452 if (c == '\\' && *cp != '\0')
467 if (c == ',' && *cp == ' ' && !gotlt) {
478 if ((cp = realloc(nbuf, strlen(nbuf) + 1)) != NULL)
484 * Fetch the sender's name from the passed message.
486 * 0 -- get sender's name for display purposes
487 * 1 -- get sender's name for reply
488 * 2 -- get sender's name for Reply
491 name1(struct message *mp, int reptype)
493 char namebuf[LINESIZE];
494 char linebuf[LINESIZE];
499 if ((cp = hfield("from", mp)) != NULL)
501 if (reptype == 0 && (cp = hfield("sender", mp)) != NULL)
505 if (readline(ibuf, linebuf, LINESIZE) < 0)
506 return (savestr(namebuf));
508 for (cp = linebuf; *cp != '\0' && *cp != ' '; cp++)
510 for (; *cp == ' ' || *cp == '\t'; cp++)
512 for (cp2 = &namebuf[strlen(namebuf)];
513 *cp != '\0' && *cp != ' ' && *cp != '\t' &&
514 cp2 < namebuf + LINESIZE - 1;)
517 if (readline(ibuf, linebuf, LINESIZE) < 0)
518 return (savestr(namebuf));
519 if ((cp = strchr(linebuf, 'F')) == NULL)
520 return (savestr(namebuf));
521 if (strncmp(cp, "From", 4) != 0)
522 return (savestr(namebuf));
523 while ((cp = strchr(cp, 'r')) != NULL) {
524 if (strncmp(cp, "remote", 6) == 0) {
525 if ((cp = strchr(cp, 'f')) == NULL)
527 if (strncmp(cp, "from", 4) != 0)
529 if ((cp = strchr(cp, ' ')) == NULL)
536 cp2 = strrchr(namebuf, '!') + 1;
537 strlcpy(cp2, cp, sizeof(namebuf) - (cp2 - namebuf) - 1);
538 strcat(namebuf, "!");
543 return (savestr(namebuf));
547 * Count the occurances of c in str
550 charcount(char *str, int c)
555 for (i = 0, cp = str; *cp != '\0'; cp++)
562 * See if the given header field is supposed to be ignored.
565 isign(const char *field, struct ignoretab ignore[2])
567 char realfld[LINESIZE];
569 if (ignore == ignoreall)
572 * Lower-case the string, so that "Status" and "status"
573 * will hash to the same place.
575 istrncpy(realfld, field, sizeof(realfld));
576 if (ignore[1].i_count > 0)
577 return (!member(realfld, ignore + 1));
579 return (member(realfld, ignore));
583 member(char *realfield, struct ignoretab *table)
587 for (igp = table->i_head[hash(realfield)]; igp != NULL; igp = igp->i_link)
588 if (*igp->i_field == *realfield &&
589 equal(igp->i_field, realfield))