git.marmaro.de Git - mmh/blob - sbr/folder_addmsg.c

   1 /*
   2 ** folder_addmsg.c -- Link message into folder
   3 **
   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.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <fcntl.h>
  11 #include <errno.h>
  12
  13 /*
  14 ** Link message into a folder.  Return the new number
  15 ** of the message.  If an error occurs, return -1.
  16 */
  17
  18 int
  19 folder_addmsg(struct msgs **mpp, char *msgfile, int selected,
  20         int unseen, int preserve, int deleting, char *from_dir)
  21 {
  22         int infd, outfd, linkerr, msgnum;
  23         char *nmsg, newmsg[BUFSIZ];
  24         char oldmsg[BUFSIZ];
  25         struct msgs *mp;
  26         struct stat st1, st2;
  27
  28         mp = *mpp;
  29
  30         /* should we preserve the numbering of the message? */
  31         if (preserve && (msgnum = m_atoi(msgfile)) > 0) {
  32                 ;
  33         } else if (mp->nummsg == 0) {
  34                 /* check if we are adding to empty folder */
  35                 msgnum = 1;
  36         } else {
  37                 /* else use highest message number + 1 */
  38                 msgnum = mp->hghmsg + 1;
  39         }
  40
  41         /*
  42         ** We might need to make several attempts
  43         ** in order to add the message to the folder.
  44         */
  45         for (;; msgnum++) {
  46
  47                 /*
  48                 ** See if we need more space.  If we need space at the
  49                 ** end, then we allocate space for an addition 100 messages.
  50                 ** If we need space at the beginning of the range, then just
  51                 ** extend message status range to cover this message number.
  52                 */
  53                 if (msgnum > mp->hghoff) {
  54                         if ((mp = folder_realloc(mp, mp->lowoff, msgnum + 100)))
  55                                 *mpp = mp;
  56                         else {
  57                                 advise(NULL, "unable to allocate folder storage");
  58                                 return -1;
  59                         }
  60                 } else if (msgnum < mp->lowoff) {
  61                         if ((mp = folder_realloc(mp, msgnum, mp->hghoff)))
  62                                 *mpp = mp;
  63                         else {
  64                                 advise(NULL, "unable to allocate folder storage");
  65                                 return -1;
  66                         }
  67                 }
  68
  69                 /*
  70                 ** If a message is already in that slot,
  71                 ** then loop to next available slot.
  72                 */
  73                 if (does_exist(mp, msgnum))
  74                         continue;
  75
  76                 /* setup the bit flags for this message */
  77                 clear_msg_flags(mp, msgnum);
  78                 set_exists(mp, msgnum);
  79
  80                 /* should we set the SELECT_UNSEEN bit? */
  81                 if (unseen) {
  82                         set_unseen(mp, msgnum);
  83                 }
  84
  85                 /* should we set the SELECTED bit? */
  86                 if (selected) {
  87                         set_selected(mp, msgnum);
  88
  89                         /* check if highest or lowest selected */
  90                         if (mp->numsel == 0) {
  91                                 mp->lowsel = msgnum;
  92                                 mp->hghsel = msgnum;
  93                         } else {
  94                                 if (msgnum < mp->lowsel)
  95                                         mp->lowsel = msgnum;
  96                                 if (msgnum > mp->hghsel)
  97                                         mp->hghsel = msgnum;
  98                         }
  99
 100                         /* increment number selected */
 101                         mp->numsel++;
 102                 }
 103
 104                 /*
 105                 ** check if this is highest or lowest message
 106                 */
 107                 if (mp->nummsg == 0) {
 108                         mp->lowmsg = msgnum;
 109                         mp->hghmsg = msgnum;
 110                 } else {
 111                         if (msgnum < mp->lowmsg)
 112                                 mp->lowmsg = msgnum;
 113                         if (msgnum > mp->hghmsg)
 114                                 mp->hghmsg = msgnum;
 115                 }
 116
 117                 /* increment message count */
 118                 mp->nummsg++;
 119
 120                 nmsg = m_name(msgnum);
 121                 snprintf(newmsg, sizeof(newmsg), "%s/%s", mp->foldpath, nmsg);
 122
 123                 /*
 124                 ** Now try to link message into folder.  Then run the
 125                 ** external hook on the message if one was specified in
 126                 ** the context.  Run the refile hook if we're moving the
 127                 ** message from one place to another.  We have to construct
 128                 ** the from path name for this because it's not there.
 129                 ** Run the add hook if the message is getting copied or
 130                 ** linked somewhere else.
 131                 */
 132                 if (link(msgfile, newmsg) != -1) {
 133
 134                         if (deleting) {
 135                                 snprintf(oldmsg, sizeof (oldmsg), "%s/%s",
 136                                                 from_dir, msgfile);
 137                                 ext_hook("ref-hook", oldmsg, newmsg);
 138                         } else
 139                                 ext_hook("add-hook", newmsg, NULL);
 140
 141                         return msgnum;
 142                 } else {
 143                         linkerr = errno;
 144
 145                         /*
 146                         ** Check if the file in our desired location is
 147                         ** the same as the source file.  If so, then just
 148                         ** leave it alone and return.  Otherwise, we will
 149                         ** continue the main loop and try again at another
 150                         ** slot (hghmsg+1).
 151                         */
 152                         if (linkerr == EEXIST) {
 153                                 if (stat(msgfile, &st2) == 0 && stat(newmsg, &st1) == 0
 154                                         && st2.st_ino == st1.st_ino) {
 155                                         return msgnum;
 156                                 } else {
 157                                         continue;
 158                                 }
 159                         }
 160
 161                         /*
 162                         ** If link failed because we are trying to link
 163                         ** across devices, then check if there is a message
 164                         ** already in the desired location.  If so, then return
 165                         ** error, else just copy the message.
 166                         */
 167                         if (linkerr == EXDEV) {
 168                                 if (stat(newmsg, &st1) == 0) {
 169                                         advise(NULL, "message %s:%s already exists", mp->foldpath, newmsg);
 170                                         return -1;
 171                                 } else {
 172                                         if ((infd = open(msgfile, O_RDONLY)) == -1) {
 173                                                 advise(msgfile, "unable to open message %s", msgfile);
 174                                                 return -1;
 175                                         }
 176                                         fstat(infd, &st1);
 177                                         if ((outfd = creat(newmsg, (int) st1.st_mode & 0777)) == -1) {
 178                                                 advise(newmsg, "unable to create");
 179                                                 close(infd);
 180                                                 return -1;
 181                                         }
 182                                         cpydata(infd, outfd, msgfile, newmsg);
 183                                         close(infd);
 184                                         close(outfd);
 185
 186                                         if (deleting) {
 187                                                 snprintf(oldmsg, sizeof oldmsg,
 188                                                                 "%s/%s",
 189                                                                 from_dir,
 190                                                                 msgfile);
 191                                                 ext_hook("ref-hook", oldmsg, newmsg);
 192                                         } else
 193                                                 ext_hook("add-hook", newmsg, NULL);
 194
 195                                         return msgnum;
 196                                 }
 197                         }
 198
 199                         /*
 200                         ** Else, some other type of link error,
 201                         ** so just return error.
 202                         */
 203                         advise(newmsg, "error linking %s to", msgfile);
 204                         return -1;
 205                 }
 206         }
 207 }