2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 static char sccsid[] = "@(#)fio.c 8.2 (Berkeley) 4/20/95";
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
50 * Mail -- a mail program
55 extern int wait_status;
58 * Set up the input pointers while copying the mail file into /tmp.
61 setptr(FILE *ibuf, off_t offset)
68 char linebuf[LINESIZE], pathbuf[PATHSIZE];
71 /* Get temporary file. */
72 (void)snprintf(pathbuf, sizeof(pathbuf), "%s/mail.XXXXXXXXXX", tmpdir);
73 if ((c = mkstemp(pathbuf)) == -1 || (mestmp = Fdopen(c, "r+")) == NULL)
74 err(1, "can't open %s", pathbuf);
80 /* Seek into the file to get to the new messages */
81 (void)fseeko(ibuf, offset, SEEK_SET);
83 * We need to make "offset" a pointer to the end of
84 * the temp file that has the copy of the mail file.
85 * If any messages have been edited, this will be
86 * different from the offset into the mail file.
88 (void)fseeko(otf, (off_t)0, SEEK_END);
94 this.m_flag = MUSED|MNEW;
100 if (fgets(linebuf, sizeof(linebuf), ibuf) == NULL) {
101 if (append(&this, mestmp))
102 errx(1, "temporary file");
103 makemessage(mestmp, omsgCount);
106 count = strlen(linebuf);
108 * Transforms lines ending in <CR><LF> to just <LF>.
109 * This allows mail to be able to read Eudora mailboxes.
111 if (count >= 2 && linebuf[count - 1] == '\n' &&
112 linebuf[count - 2] == '\r') {
114 linebuf[count - 1] = '\n';
117 (void)fwrite(linebuf, sizeof(*linebuf), count, otf);
121 linebuf[count - 1] = '\0';
122 if (maybe && linebuf[0] == 'F' && ishead(linebuf)) {
124 if (append(&this, mestmp))
125 errx(1, "temporary file");
126 this.m_flag = MUSED|MNEW;
129 this.m_block = blockof(offset);
130 this.m_offset = boffsetof(offset);
132 } else if (linebuf[0] == 0) {
135 for (cp = linebuf, cp2 = "status";; cp++) {
136 if ((c = *cp2++) == '\0') {
137 while (isspace((unsigned char)*cp++))
141 while ((c = *cp++) != '\0')
143 this.m_flag |= MREAD;
145 this.m_flag &= ~MNEW;
149 if (*cp != c && *cp != toupper((unsigned char)c))
154 this.m_size += count;
156 maybe = linebuf[0] == 0;
161 * Drop the passed line onto the passed output buffer.
162 * If a write error occurs, return -1, else the count of
163 * characters written, including the newline if requested.
166 putline(FILE *obuf, char *linebuf, int outlf)
171 (void)fwrite(linebuf, sizeof(*linebuf), c, obuf);
182 * Read up a line from the specified input into the line
183 * buffer. Return the number of characters read. Do not
184 * include the newline (or carriage return) at the end.
187 readline(FILE *ibuf, char *linebuf, int linesize)
192 if (fgets(linebuf, linesize, ibuf) == NULL)
195 if (n > 0 && linebuf[n - 1] == '\n')
197 if (n > 0 && linebuf[n - 1] == '\r')
203 * Return a file buffer all ready to read up the
204 * passed message pointer.
207 setinput(struct message *mp)
212 positionof(mp->m_block, mp->m_offset), SEEK_SET) < 0)
218 * Take the data out of the passed ghost file and toss it into
219 * a dynamically allocated message structure.
222 makemessage(FILE *f, int omsgCount)
225 struct message *nmessage;
227 size = (msgCount + 1) * sizeof(struct message);
228 nmessage = (struct message *)realloc(message, size);
229 if (nmessage == NULL)
230 errx(1, "Insufficient memory for %d messages\n",
232 if (omsgCount == 0 || message == NULL)
235 dot = nmessage + (dot - message);
237 size -= (omsgCount + 1) * sizeof(struct message);
239 (void)lseek(fileno(f), (off_t)sizeof(*message), 0);
240 if (read(fileno(f), (void *)&message[omsgCount], size) != size)
241 errx(1, "Message temporary file corrupted");
242 message[msgCount].m_size = 0;
243 message[msgCount].m_lines = 0;
248 * Append the passed message descriptor onto the temp file.
249 * If the write fails, return 1, else 0
252 append(struct message *mp, FILE *f)
254 return (fwrite((char *)mp, sizeof(*mp), 1, f) != 1);
258 * Delete a file, but only if the file is a plain file.
265 if (stat(name, &sb) < 0)
267 if (!S_ISREG(sb.st_mode)) {
271 return (unlink(name));
274 static int sigdepth; /* depth of holdsigs() */
275 static sigset_t nset, oset;
277 * Hold signals SIGHUP, SIGINT, and SIGQUIT.
283 if (sigdepth++ == 0) {
284 (void)sigemptyset(&nset);
285 (void)sigaddset(&nset, SIGHUP);
286 (void)sigaddset(&nset, SIGINT);
287 (void)sigaddset(&nset, SIGQUIT);
288 (void)sigprocmask(SIG_BLOCK, &nset, &oset);
293 * Release signals SIGHUP, SIGINT, and SIGQUIT.
300 (void)sigprocmask(SIG_SETMASK, &oset, NULL);
304 * Determine the size of the file possessed by
312 if (fstat(fileno(iob), &sbuf) < 0)
314 return (sbuf.st_size);
318 * Evaluate the string given as a new mailbox name.
319 * Supported meta characters:
320 * % for my system mail box
321 * %user for user's system mail box
322 * # for previous file
323 * & invoker's mbox file
324 * +file file in folder directory
325 * any shell meta character
326 * Return the file name as a dynamic string.
331 char xname[PATHSIZE];
332 char cmdbuf[PATHSIZE]; /* also used for file names */
339 * The order of evaluation is "%" and "#" expand into constants.
340 * "&" can expand into "+". "+" can expand into shell meta characters.
341 * Shell meta characters expand into constants.
342 * This way, we make no recursive expansion.
346 findmail(name[1] ? name + 1 : myname, xname, sizeof(xname));
347 return (savestr(xname));
351 if (prevfile[0] == 0) {
352 printf("No previous file\n");
355 return (savestr(prevfile));
357 if (name[1] == 0 && (name = value("MBOX")) == NULL)
361 if (name[0] == '+' && getfold(cmdbuf, sizeof(cmdbuf)) >= 0) {
362 (void)snprintf(xname, sizeof(xname), "%s/%s", cmdbuf, name + 1);
363 name = savestr(xname);
365 /* catch the most common shell meta character */
366 if (name[0] == '~' && homedir != NULL &&
367 (name[1] == '/' || name[1] == '\0')) {
368 (void)snprintf(xname, sizeof(xname), "%s%s", homedir, name + 1);
369 name = savestr(xname);
371 if (!strpbrk(name, "~{[*?$`'\"\\"))
372 return (savestr(name));
373 if (pipe(pivec) < 0) {
377 (void)snprintf(cmdbuf, sizeof(cmdbuf), "echo %s", name);
378 if ((sh = value("SHELL")) == NULL)
380 pid = start_command(sh, 0, -1, pivec[1], "-c", cmdbuf, NULL);
382 (void)close(pivec[0]);
383 (void)close(pivec[1]);
386 (void)close(pivec[1]);
387 l = read(pivec[0], xname, BUFSIZ);
388 (void)close(pivec[0]);
389 if (wait_child(pid) < 0 && WIFSIGNALED(wait_status) &&
390 WTERMSIG(wait_status) != SIGPIPE) {
391 fprintf(stderr, "\"%s\": Expansion failed.\n", name);
399 fprintf(stderr, "\"%s\": No match.\n", name);
403 fprintf(stderr, "\"%s\": Expansion buffer overflow.\n", name);
407 for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--)
410 if (strchr(xname, ' ') && stat(xname, &sbuf) < 0) {
411 fprintf(stderr, "\"%s\": Ambiguous.\n", name);
414 return (savestr(xname));
418 * Determine the current folder directory name.
421 getfold(char *name, int namelen)
426 if ((folder = value("folder")) == NULL)
429 copylen = strlcpy(name, folder, namelen);
431 copylen = snprintf(name, namelen, "%s/%s",
432 homedir ? homedir : ".", folder);
433 return (copylen < 0 || copylen >= namelen ? (-1) : (0));
437 * Return the name of the dead.letter file.
444 if ((cp = value("DEAD")) == NULL || (cp = expand(cp)) == NULL)
445 cp = expand("~/dead.letter");
446 else if (*cp != '/') {
449 (void)snprintf(buf, sizeof(buf), "~/%s", cp);