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
32 static char sccsid[] = "@(#)aux.c 8.1 (Berkeley) 6/6/93";
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
46 * Mail -- a mail program
48 * Auxiliary functions.
51 static char *save2str(char *, char *);
54 * Return a pointer to a dynamic copy of the argument.
60 int size = strlen(str) + 1;
62 if ((new = salloc(size)) != NULL)
63 bcopy(str, new, size);
68 * Make a copy of new argument incorporating old one.
71 save2str(char *str, char *old)
74 int newsize = strlen(str) + 1;
75 int oldsize = old ? strlen(old) + 1 : 0;
77 if ((new = salloc(newsize + oldsize)) != NULL) {
79 bcopy(old, new, oldsize);
80 new[oldsize - 1] = ' ';
82 bcopy(str, new + oldsize, newsize);
88 * Touch the named message by setting its MTOUCH flag.
89 * Touched messages have the effect of not being sent
90 * back to the system mailbox on exit.
93 touch(struct message *mp)
97 if ((mp->m_flag & MREAD) == 0)
98 mp->m_flag |= MREAD|MSTATUS;
102 * Test to see if the passed file name is a directory.
103 * Return true if it is.
110 if (stat(name, &sbuf) < 0)
112 return (S_ISDIR(sbuf.st_mode));
116 * Count the number of arguments in the given string raw list.
119 argcount(char **argv)
123 for (ap = argv; *ap++ != NULL;)
125 return (ap - argv - 1);
129 * Return the desired header line from the passed message
130 * pointer (or NULL if the desired header field is not available).
133 hfield(const char *field, struct message *mp)
136 char linebuf[LINESIZE];
139 char *colon, *oldhfield = NULL;
142 if ((lc = mp->m_lines - 1) < 0)
144 if (readline(ibuf, linebuf, LINESIZE) < 0)
147 if ((lc = gethfield(ibuf, linebuf, lc, &colon)) < 0)
149 if ((hfield = ishfield(linebuf, colon, field)) != NULL)
150 oldhfield = save2str(hfield, oldhfield);
156 * Return the next header field found in the given message.
157 * Return >= 0 if something found, < 0 elsewise.
158 * "colon" is set to point to the colon in the header.
159 * Must deal with \ continuations & other such fraud.
162 gethfield(FILE *f, char linebuf[], int rem, char **colon)
164 char line2[LINESIZE];
171 if ((c = readline(f, linebuf, LINESIZE)) <= 0)
173 for (cp = linebuf; isprint((unsigned char)*cp) && *cp != ' ' && *cp != ':';
176 if (*cp != ':' || cp == linebuf)
179 * I guess we got a headline.
180 * Handle wraparounding
185 while (--cp >= linebuf && (*cp == ' ' || *cp == '\t'))
190 ungetc(c = getc(f), f);
191 if (c != ' ' && c != '\t')
193 if ((c = readline(f, line2, LINESIZE)) < 0)
196 for (cp2 = line2; *cp2 == ' ' || *cp2 == '\t'; cp2++)
199 if (cp + c >= linebuf + LINESIZE - 2)
212 * Check whether the passed line is a header line of
213 * the desired breed. Return the field body, or 0.
217 ishfield(char *linebuf, char *colon, const char *field)
222 if (strcasecmp(linebuf, field) != 0) {
227 for (cp++; *cp == ' ' || *cp == '\t'; cp++)
233 * Copy a string and lowercase the result.
234 * dsize: space left in buffer (including space for NULL)
237 istrncpy(char *dest, const char *src, size_t dsize)
240 strlcpy(dest, src, dsize);
241 for (; *dest; dest++)
242 *dest = tolower((unsigned char)*dest);
246 * The following code deals with input stacking to do source
247 * commands. All but the current file pointer are saved on
251 static int ssp; /* Top of file stack */
253 FILE *s_file; /* File we were in. */
254 int s_cond; /* Saved state of conditionals */
255 int s_loading; /* Loading .mailrc, etc. */
257 #define SSTACK_SIZE 64 /* XXX was NOFILE. */
258 static struct sstack sstack[SSTACK_SIZE];
261 * Pushdown current input file and switch to a new one.
262 * Set the global flag "sourcing" so that others will realize
263 * that they are no longer reading from a tty (in all probability).
266 source(char **arglist)
271 if ((cp = expand(*arglist)) == NULL)
273 if ((fi = Fopen(cp, "r")) == NULL) {
277 if (ssp >= SSTACK_SIZE - 1) {
278 printf("Too much \"sourcing\" going on.\n");
282 sstack[ssp].s_file = input;
283 sstack[ssp].s_cond = cond;
284 sstack[ssp].s_loading = loading;
294 * Pop the current input back to the previous level.
295 * Update the "sourcing" flag as appropriate.
301 printf("\"Source\" stack over-pop.\n");
307 printf("Unmatched \"if\"\n");
309 cond = sstack[ssp].s_cond;
310 loading = sstack[ssp].s_loading;
311 input = sstack[ssp].s_file;
318 * Touch the indicated file.
319 * This is nifty for the shell.
324 struct timespec ts[2];
326 (void)clock_gettime(CLOCK_REALTIME, &ts[0]);
329 ts[1].tv_nsec = UTIME_OMIT;
330 (void)utimensat(AT_FDCWD, name, ts, 0);
334 * Get sender's name from this message. If the message has
335 * a bunch of arpanet stuff in it, we may have to skin the name
336 * before returning it.
339 nameof(struct message *mp, int reptype)
343 cp = skin(name1(mp, reptype));
344 if (reptype != 0 || charcount(cp, '!') < 2)
346 cp2 = strrchr(cp, '!');
348 while (cp2 > cp && *cp2 != '!')
356 * Start of a "comment".
360 skip_comment(char *cp)
364 for (; nesting > 0 && *cp; cp++) {
382 * Skin an arpa net address according to the RFC 822 interpretation
388 char *nbuf, *bufend, *cp, *cp2;
389 int c, gotlt, lastsp;
393 if (strchr(name, '(') == NULL && strchr(name, '<') == NULL
394 && strchr(name, ' ') == NULL)
397 /* We assume that length(input) <= length(output) */
398 if ((nbuf = malloc(strlen(name) + 1)) == NULL)
399 err(1, "Out of memory");
403 for (cp = name, cp2 = bufend; (c = *cp++) != '\0'; ) {
406 cp = skip_comment(cp);
412 * Start of a "quoted-string".
413 * Copy it in its entirety.
415 while ((c = *cp) != '\0') {
421 else if ((c = *cp) != '\0') {
430 if (cp[0] == 'a' && cp[1] == 't' && cp[2] == ' ')
431 cp += 3, *cp2++ = '@';
433 if (cp[0] == '@' && cp[1] == ' ')
434 cp += 2, *cp2++ = '@';
448 while ((c = *cp) != '\0' && c != ',') {
451 cp = skip_comment(cp);
453 while ((c = *cp) != '\0') {
457 if (c == '\\' && *cp != '\0')
472 if (c == ',' && !gotlt &&
473 (*cp == ' ' || *cp == '"' || *cp == '<')) {
484 if ((cp = realloc(nbuf, strlen(nbuf) + 1)) != NULL)
490 * Fetch the sender's name from the passed message.
492 * 0 -- get sender's name for display purposes
493 * 1 -- get sender's name for reply
494 * 2 -- get sender's name for Reply
497 name1(struct message *mp, int reptype)
499 char namebuf[LINESIZE];
500 char linebuf[LINESIZE];
505 if ((cp = hfield("from", mp)) != NULL)
507 if (reptype == 0 && (cp = hfield("sender", mp)) != NULL)
511 if (readline(ibuf, linebuf, LINESIZE) < 0)
512 return (savestr(namebuf));
514 for (cp = linebuf; *cp != '\0' && *cp != ' '; cp++)
516 for (; *cp == ' ' || *cp == '\t'; cp++)
518 for (cp2 = &namebuf[strlen(namebuf)];
519 *cp != '\0' && *cp != ' ' && *cp != '\t' &&
520 cp2 < namebuf + LINESIZE - 1;)
523 if (readline(ibuf, linebuf, LINESIZE) < 0)
524 return (savestr(namebuf));
525 if ((cp = strchr(linebuf, 'F')) == NULL)
526 return (savestr(namebuf));
527 if (strncmp(cp, "From", 4) != 0)
528 return (savestr(namebuf));
529 while ((cp = strchr(cp, 'r')) != NULL) {
530 if (strncmp(cp, "remote", 6) == 0) {
531 if ((cp = strchr(cp, 'f')) == NULL)
533 if (strncmp(cp, "from", 4) != 0)
535 if ((cp = strchr(cp, ' ')) == NULL)
542 cp2 = strrchr(namebuf, '!') + 1;
543 strlcpy(cp2, cp, sizeof(namebuf) - (cp2 - namebuf) - 1);
544 strcat(namebuf, "!");
549 return (savestr(namebuf));
553 * Count the occurrences of c in str
556 charcount(char *str, int c)
561 for (i = 0, cp = str; *cp != '\0'; cp++)
568 * See if the given header field is supposed to be ignored.
571 isign(const char *field, struct ignoretab ignore[2])
573 char realfld[LINESIZE];
575 if (ignore == ignoreall)
578 * Lower-case the string, so that "Status" and "status"
579 * will hash to the same place.
581 istrncpy(realfld, field, sizeof(realfld));
582 if (ignore[1].i_count > 0)
583 return (!member(realfld, ignore + 1));
585 return (member(realfld, ignore));
589 member(char *realfield, struct ignoretab *table)
593 for (igp = table->i_head[hash(realfield)]; igp != NULL; igp = igp->i_link)
594 if (*igp->i_field == *realfield &&
595 equal(igp->i_field, realfield))