[mmh] / uip / packf.c

/*
 * packf.c -- pack a nmh folder into a file
 *
 * $Id$
 *
 * 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>
#include <fcntl.h>
#include <h/dropsbr.h>
#include <h/utils.h>
#include <errno.h>

/*
 * We allocate space for messages (msgs array)
 * this number of elements at a time.
 */
#define MAXMSGS  256


static struct swit switches[] = {
#define FILESW         0
    { "file name", 0 },
#define MBOXSW         1
    { "mbox", 0 },
#define MMDFSW         2
    { "mmdf", 0 },
#define VERSIONSW      3
    { "version", 0 },
#define HELPSW         4
    { "help", 0 },
    { NULL, 0 }
};

static int md = NOTOK;
static int mbx_style = MBOX_FORMAT;
static int mapping = 0;

char *file = NULL;


int
main (int argc, char **argv)
{
    int nummsgs, maxmsgs, fd, msgnum;
    char *cp, *maildir, *msgnam, *folder = NULL, buf[BUFSIZ];
    char **argp, **arguments, **msgs;
    struct msgs *mp;
    struct stat st;

#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;

    /* Allocate the initial space to record message
     * names and ranges.
     */
    nummsgs = 0;
    maxmsgs = MAXMSGS;
    msgs = (char **) mh_xmalloc ((size_t) (maxmsgs * sizeof(*msgs)));

    /*
     * Parse arguments
     */
    while ((cp = *argp++)) {
        if (*cp == '-') {
            switch (smatch (++cp, switches)) {
                case AMBIGSW: 
                    ambigsw (cp, switches);
                    done (1);
                case UNKWNSW: 
                    adios (NULL, "-%s unknown", 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 FILESW: 
                    if (file)
                        adios (NULL, "only one file at a time!");
                    if (!(file = *argp++) || *file == '-')
                        adios (NULL, "missing argument to %s", argp[-2]);
                    continue;

                case MBOXSW:
                    mbx_style = MBOX_FORMAT;
                    mapping = 0;
                    continue;
                case MMDFSW:
                    mbx_style = MMDF_FORMAT;
                    mapping = 1;
                    continue;
            }
        }
        if (*cp == '+' || *cp == '@') {
            if (folder)
                adios (NULL, "only one folder at a time!");
            folder = path (cp + 1, *cp == '+' ? TFOLDER : TSUBCWF);
        } else {
            /*
             * Check if we need to allocate more space
             * for message name/ranges.
             */
            if (nummsgs >= maxmsgs) {
                maxmsgs += MAXMSGS;
                if (!(msgs = (char **) realloc (msgs,
                        (size_t) (maxmsgs * sizeof(*msgs)))))
                    adios (NULL, "unable to reallocate msgs storage");
            }
            msgs[nummsgs++] = cp;
        }
    }

    if (!file)
        file = "./msgbox";
    file = path (file, TFILE);

    /*
     * Check if file to be created (or appended to)
     * exists.  If not, ask for confirmation.
     */
    if (stat (file, &st) == NOTOK) {
        if (errno != ENOENT)
            adios (file, "error on file");
        cp = concat ("Create file \"", file, "\"? ", NULL);
        if (!getanswer (cp))
            done (1);
        free (cp);
    }

    if (!context_find ("path"))
        free (path ("./", TFOLDER));

    /* default is to pack whole folder */
    if (!nummsgs)
        msgs[nummsgs++] = "all";

    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 < nummsgs; msgnum++)
        if (!m_convert (mp, msgs[msgnum]))
            done (1);
    seq_setprev (mp);   /* set the previous-sequence */

    /* open and lock new maildrop file */
    if ((md = mbx_open(file, mbx_style, getuid(), getgid(), m_gmprot())) == NOTOK)
        adios (file, "unable to open");

    /* copy all the SELECTED messages to the file */
    for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
        if (is_selected(mp, msgnum)) {
            if ((fd = open (msgnam = m_name (msgnum), O_RDONLY)) == NOTOK) {
                admonish (msgnam, "unable to read message");
                break;
            }

            if (mbx_copy (file, mbx_style, md, fd, mapping, NULL, 1) == NOTOK)
                adios (file, "error writing to file");

            close (fd);
        }

    /* close and unlock maildrop file */
    mbx_close (file, md);

    context_replace (pfolder, folder);  /* update current folder         */
    if (mp->hghsel != mp->curmsg)
        seq_setcur (mp, mp->lowsel);
    seq_save (mp);
    context_save ();                    /* save the context file         */
    folder_free (mp);                   /* free folder/message structure */
    return done (0);
}

int
done (int status)
{
    mbx_close (file, md);
    exit (status);
    return 1;  /* dead code to satisfy the compiler */
}