3 * burst.c -- explode digests into individual messages
5 * This code is Copyright (c) 2002, by the authors of nmh. See the
6 * COPYRIGHT file in the root directory of the nmh distribution for
7 * complete copyright information.
12 static struct swit switches[] = {
32 static char delim3[] = "-------";
42 static int find_delim (int, struct smsg *);
43 static void burst (struct msgs **, int, struct smsg *, int, int, int, char *);
44 static void cpybrst (FILE *, FILE *, char *, char *, int);
48 main (int argc, char **argv)
50 int inplace = 0, quietsw = 0, verbosw = 0;
51 int msgp = 0, hi, msgnum, numburst;
52 char *cp, *maildir, *folder = NULL, buf[BUFSIZ];
53 char **argp, **arguments, *msgs[MAXARGS];
58 setlocale(LC_ALL, "");
60 invo_name = r1bindex (argv[0], '/');
62 /* read user profile/context */
65 arguments = getarguments (invo_name, argc, argv, 1);
68 while ((cp = *argp++)) {
70 switch (smatch (++cp, switches)) {
72 ambigsw (cp, switches);
75 adios (NULL, "-%s unknown\n", cp);
78 snprintf (buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
80 print_help (buf, switches, 1);
83 print_version(invo_name);
108 if (*cp == '+' || *cp == '@') {
110 adios (NULL, "only one folder at a time!");
112 folder = pluspath (cp);
118 if (!context_find ("path"))
119 free (path ("./", TFOLDER));
121 msgs[msgp++] = "cur";
123 folder = getfolder (1);
124 maildir = m_maildir (folder);
126 if (chdir (maildir) == NOTOK)
127 adios (maildir, "unable to change directory to");
129 /* read folder and create message structure */
130 if (!(mp = folder_read (folder)))
131 adios (NULL, "unable to read folder %s", folder);
133 /* check for empty folder */
135 adios (NULL, "no messages in %s", folder);
137 /* parse all the message ranges/sequences and set SELECTED */
138 for (msgnum = 0; msgnum < msgp; msgnum++)
139 if (!m_convert (mp, msgs[msgnum]))
141 seq_setprev (mp); /* set the previous-sequence */
143 smsgs = (struct smsg *)
144 calloc ((size_t) (MAXFOLDER + 2), sizeof(*smsgs));
146 adios (NULL, "unable to allocate burst storage");
150 /* burst all the SELECTED messages */
151 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
152 if (is_selected (mp, msgnum)) {
153 if ((numburst = find_delim (msgnum, smsgs)) >= 1) {
155 printf ("%d message%s exploded from digest %d\n",
156 numburst, numburst > 1 ? "s" : "", msgnum);
157 burst (&mp, msgnum, smsgs, numburst, inplace, verbosw, maildir);
161 admonish (NULL, "message %d not in digest format",
163 } /* this pair of braces was missing before 1999-07-15 */
165 adios (NULL, "burst() botch -- you lose big");
170 free ((char *) smsgs);
171 context_replace (pfolder, folder); /* update current folder */
174 * If -inplace is given, then the first message burst becomes
175 * the current message (which will now show a table of contents).
176 * Otherwise, the first message extracted from the first digest
177 * becomes the current message.
180 if (mp->lowsel != mp->curmsg)
181 seq_setcur (mp, mp->lowsel);
183 if (hi <= mp->hghmsg)
187 seq_save (mp); /* synchronize message sequences */
188 context_save (); /* save the context file */
189 folder_free (mp); /* free folder/message structure */
196 * Scan the message and find the beginning and
197 * end of all the messages in the digest.
201 find_delim (int msgnum, struct smsg *smsgs)
203 int ld3, wasdlm, msgp;
210 ld3 = strlen (delim3);
212 if ((in = fopen (msgnam = m_name (msgnum), "r")) == NULL)
213 adios (msgnam, "unable to read message");
215 for (msgp = 0, pos = 0L; msgp <= MAXFOLDER;) {
216 while (fgets (buffer, sizeof(buffer), in) && buffer[0] == '\n')
217 pos += (long) strlen (buffer);
220 fseek (in, pos, SEEK_SET);
221 smsgs[msgp].s_start = pos;
223 for (c = 0; fgets (buffer, sizeof(buffer), in); c = buffer[0]) {
224 if (strncmp (buffer, delim3, ld3) == 0
225 && (msgp == 1 || c == '\n')
226 && ((cc = peekc (in)) == '\n' || cc == EOF))
229 pos += (long) strlen (buffer);
232 wasdlm = strncmp (buffer, delim3, ld3) == 0;
233 if (smsgs[msgp].s_start != pos)
234 smsgs[msgp++].s_stop = (c == '\n' && wasdlm) ? pos - 1 : pos;
238 smsgs[msgp - 1].s_stop -= ((long) strlen (buffer) + 1);
239 msgp++; /* fake "End of XXX Digest" */
244 pos += (long) strlen (buffer);
248 return (msgp - 1); /* toss "End of XXX Digest" */
253 * Burst out the messages in the digest into the folder
257 burst (struct msgs **mpp, int msgnum, struct smsg *smsgs, int numburst,
258 int inplace, int verbosw, char *maildir)
262 char f1[BUFSIZ], f2[BUFSIZ], f3[BUFSIZ];
267 if ((in = fopen (msgnam = m_name (msgnum), "r")) == NULL)
268 adios (msgnam, "unable to read message");
270 mode = fstat (fileno(in), &st) != NOTOK ? (st.st_mode & 0777) : m_gmprot();
274 * See if we have enough space in the folder
275 * structure for all the new messages.
277 if ((mp->hghmsg + numburst > mp->hghoff) &&
278 !(mp = folder_realloc (mp, mp->lowoff, mp->hghmsg + numburst)))
279 adios (NULL, "unable to allocate folder storage");
282 j = mp->hghmsg; /* old value */
283 mp->hghmsg += numburst;
284 mp->nummsg += numburst;
287 * If this is not the highest SELECTED message, then
288 * increment mp->hghsel by numburst, since the highest
289 * SELECTED is about to be slid down by that amount.
291 if (msgnum < mp->hghsel)
292 mp->hghsel += numburst;
295 * If -inplace is given, renumber the messages after the
296 * source message, to make room for each of the messages
297 * contained within the digest.
299 * This is equivalent to refiling a message from the point
300 * of view of the external hooks.
303 for (i = mp->hghmsg; j > msgnum; i--, j--) {
304 strncpy (f1, m_name (i), sizeof(f1));
305 strncpy (f2, m_name (j), sizeof(f2));
306 if (does_exist (mp, j)) {
308 printf ("message %d becomes message %d\n", j, i);
310 if (rename (f2, f1) == NOTOK)
311 admonish (f1, "unable to rename %s to", f2);
313 (void)snprintf(f1, sizeof (f1), "%s/%d", maildir, i);
314 (void)snprintf(f2, sizeof (f2), "%s/%d", maildir, j);
315 ext_hook("ref-hook", f1, f2);
317 copy_msg_flags (mp, i, j);
318 clear_msg_flags (mp, j);
319 mp->msgflags |= SEQMOD;
324 unset_selected (mp, msgnum);
326 /* new hghmsg is hghmsg + numburst
328 * At this point, there is an array of numburst smsgs, each element of
329 * which contains the starting and stopping offsets (seeks) of the message
330 * in the digest. The inplace flag is set if the original digest is replaced
331 * by a message containing the table of contents. smsgs[0] is that table of
332 * contents. Go through the message numbers in reverse order (high to low).
334 * Set f1 to the name of the destination message, f2 to the name of a scratch
335 * file. Extract a message from the digest to the scratch file. Move the
336 * original message to a backup file if the destination message number is the
337 * same as the number of the original message, which only happens if the
338 * inplace flag is set. Then move the scratch file to the destination message.
340 * Moving the original message to the backup file is equivalent to deleting the
341 * message from the point of view of the external hooks. And bursting each
342 * message is equivalent to adding a new message.
345 i = inplace ? msgnum + numburst : mp->hghmsg;
346 for (j = numburst; j >= (inplace ? 0 : 1); i--, j--) {
347 strncpy (f1, m_name (i), sizeof(f1));
348 strncpy (f2, m_mktemp(invo_name, NULL, &out), sizeof(f2));
350 if (verbosw && i != msgnum)
351 printf ("message %d of digest %d becomes message %d\n", j, msgnum, i);
354 fseek (in, smsgs[j].s_start, SEEK_SET);
355 cpybrst (in, out, msgnam, f2,
356 (int) (smsgs[j].s_stop - smsgs[j].s_start));
360 strncpy (f3, m_backup (f1), sizeof(f3));
361 if (rename (f1, f3) == NOTOK)
362 admonish (f3, "unable to rename %s to", f1);
364 (void)snprintf(f3, sizeof (f3), "%s/%d", maildir, i);
365 ext_hook("del-hook", f3, (char *)0);
367 if (rename (f2, f1) == NOTOK)
368 admonish (f1, "unable to rename %s to", f2);
370 (void)snprintf(f3, sizeof (f3), "%s/%d", maildir, i);
371 ext_hook("add-hook", f3, (char *)0);
373 copy_msg_flags (mp, i, msgnum);
374 mp->msgflags |= SEQMOD;
386 * Copy a mesage which is being burst out of a digest.
387 * It will remove any "dashstuffing" in the message.
391 cpybrst (FILE *in, FILE *out, char *ifile, char *ofile, int len)
393 register int c, state;
395 for (state = S1; (c = fgetc (in)) != EOF && len > 0; len--) {
430 state = (c == '\n') ? S1 : S2;
439 if (ferror (in) && !feof (in))
440 adios (ifile, "error reading");
442 adios (ofile, "error writing");