/*
* burst.c -- explode digests into individual messages
*
* $Id: burst.c,v 1.5 2002/08/23 20:37:01 jon Exp $
*
* This code is Copyright (c) 2002, by the authors of nmh. See the
* COPYRIGHT file in the root directory of the nmh distribution for
* complete copyright information.
*/
#include <h/mh.h>
static struct swit switches[] = {
#define INPLSW 0
{ "inplace", 0 },
#define NINPLSW 1
{ "noinplace", 0 },
#define QIETSW 2
{ "quiet", 0 },
#define NQIETSW 3
{ "noquiet", 0 },
#define VERBSW 4
{ "verbose", 0 },
#define NVERBSW 5
{ "noverbose", 0 },
#define VERSIONSW 6
{ "version", 0 },
#define HELPSW 7
{ "help", 0 },
{ NULL, 0 }
};
static char delim3[] = "-------";
struct smsg {
long s_start;
long s_stop;
};
/*
* static prototypes
*/
static int find_delim (int, struct smsg *);
static void burst (struct msgs **, int, struct smsg *, int, int, int, char *);
static void cpybrst (FILE *, FILE *, char *, char *, int);
int
main (int argc, char **argv)
{
int inplace = 0, quietsw = 0, verbosw = 0;
int msgp = 0, hi, msgnum, numburst;
char *cp, *maildir, *folder = NULL, buf[BUFSIZ];
char **argp, **arguments, *msgs[MAXARGS];
struct smsg *smsgs;
struct msgs *mp;
#ifdef LOCALE
setlocale(LC_ALL, "");
#endif
invo_name = r1bindex (argv[0], '/');
/* read user profile/context */
context_read();
arguments = getarguments (invo_name, argc, argv, 1);
argp = arguments;
while ((cp = *argp++)) {
if (*cp == '-') {
switch (smatch (++cp, switches)) {
case AMBIGSW:
ambigsw (cp, switches);
done (1);
case UNKWNSW:
adios (NULL, "-%s unknown\n", cp);
case HELPSW:
snprintf (buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
invo_name);
print_help (buf, switches, 1);
done (1);
case VERSIONSW:
print_version(invo_name);
done (1);
case INPLSW:
inplace++;
continue;
case NINPLSW:
inplace = 0;
continue;
case QIETSW:
quietsw++;
continue;
case NQIETSW:
quietsw = 0;
continue;
case VERBSW:
verbosw++;
continue;
case NVERBSW:
verbosw = 0;
continue;
}
}
if (*cp == '+' || *cp == '@') {
if (folder)
adios (NULL, "only one folder at a time!");
else
folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
} else {
msgs[msgp++] = cp;
}
}
if (!context_find ("path"))
free (path ("./", TFOLDER));
if (!msgp)
msgs[msgp++] = "cur";
if (!folder)
folder = getfolder (1);
maildir = m_maildir (folder);
if (chdir (maildir) == NOTOK)
adios (maildir, "unable to change directory to");
/* read folder and create message structure */
if (!(mp = folder_read (folder)))
adios (NULL, "unable to read folder %s", folder);
/* check for empty folder */
if (mp->nummsg == 0)
adios (NULL, "no messages in %s", folder);
/* parse all the message ranges/sequences and set SELECTED */
for (msgnum = 0; msgnum < msgp; msgnum++)
if (!m_convert (mp, msgs[msgnum]))
done (1);
seq_setprev (mp); /* set the previous-sequence */
smsgs = (struct smsg *)
calloc ((size_t) (MAXFOLDER + 2), sizeof(*smsgs));
if (smsgs == NULL)
adios (NULL, "unable to allocate burst storage");
hi = mp->hghmsg + 1;
/* burst all the SELECTED messages */
for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
if (is_selected (mp, msgnum)) {
if ((numburst = find_delim (msgnum, smsgs)) >= 1) {
if (verbosw)
printf ("%d message%s exploded from digest %d\n",
numburst, numburst > 1 ? "s" : "", msgnum);
burst (&mp, msgnum, smsgs, numburst, inplace, verbosw, maildir);
} else {
if (numburst == 0) {
if (!quietsw)
admonish (NULL, "message %d not in digest format",
msgnum);
} /* this pair of braces was missing before 1999-07-15 */
else
adios (NULL, "burst() botch -- you lose big");
}
}
}
free ((char *) smsgs);
context_replace (pfolder, folder); /* update current folder */
/*
* If -inplace is given, then the first message burst becomes
* the current message (which will now show a table of contents).
* Otherwise, the first message extracted from the first digest
* becomes the current message.
*/
if (inplace) {
if (mp->lowsel != mp->curmsg)
seq_setcur (mp, mp->lowsel);
} else {
if (hi <= mp->hghmsg)
seq_setcur (mp, hi);
}
seq_save (mp); /* synchronize message sequences */
context_save (); /* save the context file */
folder_free (mp); /* free folder/message structure */
return done (0);
}
/*
* Scan the message and find the beginning and
* end of all the messages in the digest.
*/
static int
find_delim (int msgnum, struct smsg *smsgs)
{
int ld3, wasdlm, msgp;
long pos;
char c, *msgnam;
int cc;
char buffer[BUFSIZ];
FILE *in;
ld3 = strlen (delim3);
if ((in = fopen (msgnam = m_name (msgnum), "r")) == NULL)
adios (msgnam, "unable to read message");
for (msgp = 0, pos = 0L; msgp <= MAXFOLDER;) {
while (fgets (buffer, sizeof(buffer), in) && buffer[0] == '\n')
pos += (long) strlen (buffer);
if (feof (in))
break;
fseek (in, pos, SEEK_SET);
smsgs[msgp].s_start = pos;
for (c = 0; fgets (buffer, sizeof(buffer), in); c = buffer[0]) {
if (strncmp (buffer, delim3, ld3) == 0
&& (msgp == 1 || c == '\n')
&& ((cc = peekc (in)) == '\n' || cc == EOF))
break;
else
pos += (long) strlen (buffer);
}
wasdlm = strncmp (buffer, delim3, ld3) == 0;
if (smsgs[msgp].s_start != pos)
smsgs[msgp++].s_stop = (c == '\n' && wasdlm) ? pos - 1 : pos;
if (feof (in)) {
#if 0
if (wasdlm) {
smsgs[msgp - 1].s_stop -= ((long) strlen (buffer) + 1);
msgp++; /* fake "End of XXX Digest" */
}
#endif
break;
}
pos += (long) strlen (buffer);
}
fclose (in);
return (msgp - 1); /* toss "End of XXX Digest" */
}
/*
* Burst out the messages in the digest into the folder
*/
static void
burst (struct msgs **mpp, int msgnum, struct smsg *smsgs, int numburst,
int inplace, int verbosw, char *maildir)
{
int i, j, mode;
char *msgnam;
char f1[BUFSIZ], f2[BUFSIZ], f3[BUFSIZ];
FILE *in, *out;
struct stat st;
struct msgs *mp;
if ((in = fopen (msgnam = m_name (msgnum), "r")) == NULL)
adios (msgnam, "unable to read message");
mode = fstat (fileno(in), &st) != NOTOK ? (st.st_mode & 0777) : m_gmprot();
mp = *mpp;
/*
* See if we have enough space in the folder
* structure for all the new messages.
*/
if ((mp->hghmsg + numburst > mp->hghoff) &&
!(mp = folder_realloc (mp, mp->lowoff, mp->hghmsg + numburst)))
adios (NULL, "unable to allocate folder storage");
*mpp = mp;
j = mp->hghmsg; /* old value */
mp->hghmsg += numburst;
mp->nummsg += numburst;
/*
* If this is not the highest SELECTED message, then
* increment mp->hghsel by numburst, since the highest
* SELECTED is about to be slid down by that amount.
*/
if (msgnum < mp->hghsel)
mp->hghsel += numburst;
/*
* If -inplace is given, renumber the messages after the
* source message, to make room for each of the messages
* contained within the digest.
*
* This is equivalent to refiling a message from the point
* of view of the external hooks.
*/
if (inplace) {
for (i = mp->hghmsg; j > msgnum; i--, j--) {
strncpy (f1, m_name (i), sizeof(f1));
strncpy (f2, m_name (j), sizeof(f2));
if (does_exist (mp, j)) {
if (verbosw)
printf ("message %d becomes message %d\n", j, i);
if (rename (f2, f1) == NOTOK)
admonish (f1, "unable to rename %s to", f2);
(void)snprintf(f1, sizeof (f1), "%s/%d", maildir, i);
(void)snprintf(f2, sizeof (f2), "%s/%d", maildir, j);
ext_hook("ref-hook", f1, f2);
copy_msg_flags (mp, i, j);
clear_msg_flags (mp, j);
mp->msgflags |= SEQMOD;
}
}
}
unset_selected (mp, msgnum);
/* new hghmsg is hghmsg + numburst
*
* At this point, there is an array of numburst smsgs, each element of
* which contains the starting and stopping offsets (seeks) of the message
* in the digest. The inplace flag is set if the original digest is replaced
* by a message containing the table of contents. smsgs[0] is that table of
* contents. Go through the message numbers in reverse order (high to low).
*
* Set f1 to the name of the destination message, f2 to the name of a scratch
* file. Extract a message from the digest to the scratch file. Move the
* original message to a backup file if the destination message number is the
* same as the number of the original message, which only happens if the
* inplace flag is set. Then move the scratch file to the destination message.
*
* Moving the original message to the backup file is equivalent to deleting the
* message from the point of view of the external hooks. And bursting each
* message is equivalent to adding a new message.
*/
i = inplace ? msgnum + numburst : mp->hghmsg;
for (j = numburst; j >= (inplace ? 0 : 1); i--, j--) {
strncpy (f1, m_name (i), sizeof(f1));
strncpy (f2, m_scratch ("", invo_name), sizeof(f2));
if (verbosw && i != msgnum)
printf ("message %d of digest %d becomes message %d\n", j, msgnum, i);
if ((out = fopen (f2, "w")) == NULL)
adios (f2, "unable to write message");
chmod (f2, mode);
fseek (in, smsgs[j].s_start, SEEK_SET);
cpybrst (in, out, msgnam, f2,
(int) (smsgs[j].s_stop - smsgs[j].s_start));
fclose (out);
if (i == msgnum) {
strncpy (f3, m_backup (f1), sizeof(f3));
if (rename (f1, f3) == NOTOK)
admonish (f3, "unable to rename %s to", f1);
(void)snprintf(f3, sizeof (f3), "%s/%d", maildir, i);
ext_hook("del-hook", f3, (char *)0);
}
if (rename (f2, f1) == NOTOK)
admonish (f1, "unable to rename %s to", f2);
(void)snprintf(f3, sizeof (f3), "%s/%d", maildir, i);
ext_hook("add-hook", f3, (char *)0);
copy_msg_flags (mp, i, msgnum);
mp->msgflags |= SEQMOD;
}
fclose (in);
}
#define S1 0
#define S2 1
#define S3 2
/*
* Copy a mesage which is being burst out of a digest.
* It will remove any "dashstuffing" in the message.
*/
static void
cpybrst (FILE *in, FILE *out, char *ifile, char *ofile, int len)
{
register int c, state;
for (state = S1; (c = fgetc (in)) != EOF && len > 0; len--) {
if (c == 0)
continue;
switch (state) {
case S1:
switch (c) {
case '-':
state = S3;
break;
default:
state = S2;
case '\n':
fputc (c, out);
break;
}
break;
case S2:
switch (c) {
case '\n':
state = S1;
default:
fputc (c, out);
break;
}
break;
case S3:
switch (c) {
case ' ':
state = S2;
break;
default:
state = (c == '\n') ? S1 : S2;
fputc ('-', out);
fputc (c, out);
break;
}
break;
}
}
if (ferror (in) && !feof (in))
adios (ifile, "error reading");
if (ferror (out))
adios (ofile, "error writing");
}
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