2 ** burst.c -- explode digests into individual messages
4 ** This code is Copyright (c) 2002, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
11 static struct swit switches[] = {
31 static char delim3[] = "-------";
41 static int find_delim (int, struct smsg *);
42 static void burst (struct msgs **, int, struct smsg *, int, int, int, char *);
43 static void cpybrst (FILE *, FILE *, char *, char *, int);
47 main (int argc, char **argv)
49 int inplace = 0, quietsw = 0, verbosw = 0;
50 int msgp = 0, hi, msgnum, numburst;
51 char *cp, *maildir, *folder = NULL, buf[BUFSIZ];
52 char **argp, **arguments, *msgs[MAXARGS];
57 setlocale(LC_ALL, "");
59 invo_name = r1bindex (argv[0], '/');
61 /* read user profile/context */
64 arguments = getarguments (invo_name, argc, argv, 1);
67 while ((cp = *argp++)) {
69 switch (smatch (++cp, switches)) {
71 ambigsw (cp, switches);
74 adios (NULL, "-%s unknown\n", cp);
77 snprintf (buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
79 print_help (buf, switches, 1);
82 print_version(invo_name);
107 if (*cp == '+' || *cp == '@') {
109 adios (NULL, "only one folder at a time!");
111 folder = pluspath (cp);
117 if (!context_find ("path"))
118 free (path ("./", TFOLDER));
120 msgs[msgp++] = "cur";
122 folder = getfolder (1);
123 maildir = m_maildir (folder);
125 if (chdir (maildir) == NOTOK)
126 adios (maildir, "unable to change directory to");
128 /* read folder and create message structure */
129 if (!(mp = folder_read (folder)))
130 adios (NULL, "unable to read folder %s", folder);
132 /* check for empty folder */
134 adios (NULL, "no messages in %s", folder);
136 /* parse all the message ranges/sequences and set SELECTED */
137 for (msgnum = 0; msgnum < msgp; msgnum++)
138 if (!m_convert (mp, msgs[msgnum]))
140 seq_setprev (mp); /* set the previous-sequence */
142 smsgs = (struct smsg *)
143 calloc ((size_t) (MAXFOLDER + 2), sizeof(*smsgs));
145 adios (NULL, "unable to allocate burst storage");
149 /* burst all the SELECTED messages */
150 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
151 if (is_selected (mp, msgnum)) {
152 if ((numburst = find_delim (msgnum, smsgs)) >= 1) {
154 printf ("%d message%s exploded from digest %d\n",
155 numburst, numburst > 1 ? "s" : "", msgnum);
156 burst (&mp, msgnum, smsgs, numburst, inplace, verbosw, maildir);
160 admonish (NULL, "message %d not in digest format",
162 } /* this pair of braces was missing before 1999-07-15 */
164 adios (NULL, "burst() botch -- you lose big");
169 free ((char *) smsgs);
170 context_replace (pfolder, folder); /* update current folder */
173 ** If -inplace is given, then the first message burst becomes
174 ** the current message (which will now show a table of contents).
175 ** Otherwise, the first message extracted from the first digest
176 ** becomes the current message.
179 if (mp->lowsel != mp->curmsg)
180 seq_setcur (mp, mp->lowsel);
182 if (hi <= mp->hghmsg)
186 seq_save (mp); /* synchronize message sequences */
187 context_save (); /* save the context file */
188 folder_free (mp); /* free folder/message structure */
195 ** Scan the message and find the beginning and
196 ** end of all the messages in the digest.
200 find_delim (int msgnum, struct smsg *smsgs)
202 int ld3, wasdlm, msgp;
209 ld3 = strlen (delim3);
211 if ((in = fopen (msgnam = m_name (msgnum), "r")) == NULL)
212 adios (msgnam, "unable to read message");
214 for (msgp = 0, pos = 0L; msgp <= MAXFOLDER;) {
215 while (fgets (buffer, sizeof(buffer), in) && buffer[0] == '\n')
216 pos += (long) strlen (buffer);
219 fseek (in, pos, SEEK_SET);
220 smsgs[msgp].s_start = pos;
222 for (c = 0; fgets (buffer, sizeof(buffer), in); c = buffer[0]) {
223 if (strncmp (buffer, delim3, ld3) == 0
224 && (msgp == 1 || c == '\n')
225 && ((cc = peekc (in)) == '\n' || cc == EOF))
228 pos += (long) strlen (buffer);
231 wasdlm = strncmp (buffer, delim3, ld3) == 0;
232 if (smsgs[msgp].s_start != pos)
233 smsgs[msgp++].s_stop = (c == '\n' && wasdlm) ? pos - 1 : pos;
237 smsgs[msgp - 1].s_stop -= ((long) strlen (buffer) + 1);
238 msgp++; /* fake "End of XXX Digest" */
243 pos += (long) strlen (buffer);
247 return (msgp - 1); /* toss "End of XXX Digest" */
252 ** Burst out the messages in the digest into the folder
256 burst (struct msgs **mpp, int msgnum, struct smsg *smsgs, int numburst,
257 int inplace, int verbosw, char *maildir)
261 char f1[BUFSIZ], f2[BUFSIZ], f3[BUFSIZ];
266 if ((in = fopen (msgnam = m_name (msgnum), "r")) == NULL)
267 adios (msgnam, "unable to read message");
269 mode = fstat (fileno(in), &st) != NOTOK ? (st.st_mode & 0777) : m_gmprot();
273 ** See if we have enough space in the folder
274 ** structure for all the new messages.
276 if ((mp->hghmsg + numburst > mp->hghoff) &&
277 !(mp = folder_realloc (mp, mp->lowoff, mp->hghmsg + numburst)))
278 adios (NULL, "unable to allocate folder storage");
281 j = mp->hghmsg; /* old value */
282 mp->hghmsg += numburst;
283 mp->nummsg += numburst;
286 ** If this is not the highest SELECTED message, then
287 ** increment mp->hghsel by numburst, since the highest
288 ** SELECTED is about to be slid down by that amount.
290 if (msgnum < mp->hghsel)
291 mp->hghsel += numburst;
294 ** If -inplace is given, renumber the messages after the
295 ** source message, to make room for each of the messages
296 ** contained within the digest.
298 ** This is equivalent to refiling a message from the point
299 ** of view of the external hooks.
302 for (i = mp->hghmsg; j > msgnum; i--, j--) {
303 strncpy (f1, m_name (i), sizeof(f1));
304 strncpy (f2, m_name (j), sizeof(f2));
305 if (does_exist (mp, j)) {
307 printf ("message %d becomes message %d\n", j, i);
309 if (rename (f2, f1) == NOTOK)
310 admonish (f1, "unable to rename %s to", f2);
312 (void)snprintf(f1, sizeof (f1), "%s/%d", maildir, i);
313 (void)snprintf(f2, sizeof (f2), "%s/%d", maildir, j);
314 ext_hook("ref-hook", f1, f2);
316 copy_msg_flags (mp, i, j);
317 clear_msg_flags (mp, j);
318 mp->msgflags |= SEQMOD;
323 unset_selected (mp, msgnum);
325 /* new hghmsg is hghmsg + numburst
327 ** At this point, there is an array of numburst smsgs, each
328 ** element of which contains the starting and stopping offsets
329 ** (seeks) of the message in the digest. The inplace flag is set
330 ** if the original digest is replaced by a message containing
331 ** the table of contents. smsgs[0] is that table of contents.
332 ** 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
335 ** of a scratch file. Extract a message from the digest to the
336 ** scratch file. Move the original message to a backup file if
337 ** the destination message number is the same as the number of
338 ** the original message, which only happens if the inplace flag
339 ** is set. Then move the scratch file to the destination message.
341 ** Moving the original message to the backup file is equivalent
342 ** to deleting the message from the point of view of the external
343 ** hooks. And bursting each message is equivalent to adding a
347 i = inplace ? msgnum + numburst : mp->hghmsg;
348 for (j = numburst; j >= (inplace ? 0 : 1); i--, j--) {
349 strncpy (f1, m_name (i), sizeof(f1));
350 strncpy (f2, m_mktemp(invo_name, NULL, &out), sizeof(f2));
352 if (verbosw && i != msgnum)
353 printf ("message %d of digest %d becomes message %d\n", j, msgnum, i);
356 fseek (in, smsgs[j].s_start, SEEK_SET);
357 cpybrst (in, out, msgnam, f2,
358 (int) (smsgs[j].s_stop - smsgs[j].s_start));
362 strncpy (f3, m_backup (f1), sizeof(f3));
363 if (rename (f1, f3) == NOTOK)
364 admonish (f3, "unable to rename %s to", f1);
366 (void)snprintf(f3, sizeof (f3), "%s/%d", maildir, i);
367 ext_hook("del-hook", f3, (char *)0);
369 if (rename (f2, f1) == NOTOK)
370 admonish (f1, "unable to rename %s to", f2);
372 (void)snprintf(f3, sizeof (f3), "%s/%d", maildir, i);
373 ext_hook("add-hook", f3, (char *)0);
375 copy_msg_flags (mp, i, msgnum);
376 mp->msgflags |= SEQMOD;
388 ** Copy a mesage which is being burst out of a digest.
389 ** It will remove any "dashstuffing" in the message.
393 cpybrst (FILE *in, FILE *out, char *ifile, char *ofile, int len)
395 register int c, state;
397 for (state = S1; (c = fgetc (in)) != EOF && len > 0; len--) {
432 state = (c == '\n') ? S1 : S2;
441 if (ferror (in) && !feof (in))
442 adios (ifile, "error reading");
444 adios (ofile, "error writing");