diplodocus.org Git - nmh/blob - uip/pick.c

   1
   2 /*
   3  * pick.c -- search for messages by content
   4  *
   5  * This code is Copyright (c) 2002, 2008, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/tws.h>
  12 #include <h/picksbr.h>
  13 #include <h/utils.h>
  14
  15 #define PICK_SWITCHES \
  16     X("reverse", 0, REVSW) \
  17     X("and", 0, ANDSW) \
  18     X("or", 0, ORSW) \
  19     X("not", 0, NOTSW) \
  20     X("lbrace", 0, LBRSW) \
  21     X("rbrace", 0, RBRSW) \
  22     X("cc  pattern", 0, CCSW) \
  23     X("date  pattern", 0, DATESW) \
  24     X("from  pattern", 0, FROMSW) \
  25     X("search  pattern", 0, SRCHSW) \
  26     X("subject  pattern", 0, SUBJSW) \
  27     X("to  pattern", 0, TOSW) \
  28     X("-othercomponent  pattern", 0, OTHRSW) \
  29     X("after date", 0, AFTRSW) \
  30     X("before date", 0, BEFRSW) \
  31     X("datefield field", 5, DATFDSW) \
  32     X("sequence name", 0, SEQSW) \
  33     X("nosequence", 0, NSEQSW) \
  34     X("public", 0, PUBLSW) \
  35     X("nopublic", 0, NPUBLSW) \
  36     X("zero", 0, ZEROSW) \
  37     X("nozero", 0, NZEROSW) \
  38     X("list", 0, LISTSW) \
  39     X("nolist", 0, NLISTSW) \
  40     X("debug", 0, DEBUGSW) \
  41     X("version", 0, VERSIONSW) \
  42     X("help", 0, HELPSW) \
  43
  44 #define X(sw, minchars, id) id,
  45 DEFINE_SWITCH_ENUM(PICK);
  46 #undef X
  47
  48 #define X(sw, minchars, id) { sw, minchars, id },
  49 DEFINE_SWITCH_ARRAY(PICK, switches);
  50 #undef X
  51
  52 static int listsw = -1;
  53
  54 static void putzero_done (int) NORETURN;
  55
  56 int
  57 main (int argc, char **argv)
  58 {
  59     int publicsw = -1, zerosw = 1, vecp = 0;
  60     size_t seqp = 0;
  61     int msgnum;
  62     char *maildir, *folder = NULL, buf[100];
  63     char *cp, **argp, **arguments;
  64     svector_t seqs = svector_create (0);
  65     char *vec[MAXARGS];
  66     struct msgs_array msgs = { 0, 0, NULL };
  67     struct msgnum_array nums = { 0, 0, NULL };
  68     struct msgs *mp, *mp2;
  69     FILE *fp;
  70     int debug = 0;
  71     int reverse = 0;
  72     int start, end, inc;
  73
  74     if (nmh_init(argv[0], 1)) { return 1; }
  75
  76     done=putzero_done;
  77
  78     /* Deprecated.  Use -debug instead. */
  79     if ((cp = getenv ("MHPDEBUG")) && *cp)
  80         ++debug;
  81
  82     arguments = getarguments (invo_name, argc, argv, 1);
  83     argp = arguments;
  84
  85     while ((cp = *argp++)) {
  86         if (*cp == '-') {
  87             if (*++cp == '-') {
  88                 vec[vecp++] = --cp;
  89                 goto pattern;
  90             }
  91             switch (smatch (cp, switches)) {
  92             case AMBIGSW:
  93                 ambigsw (cp, switches);
  94                 listsw = 0;     /* HACK */
  95                 done (1);
  96             case UNKWNSW:
  97                 adios (NULL, "-%s unknown", cp);
  98
  99             case HELPSW:
 100                 snprintf (buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
 101                           invo_name);
 102                 print_help (buf, switches, 1);
 103                 listsw = 0;     /* HACK */
 104                 done (0);
 105             case VERSIONSW:
 106                 print_version(invo_name);
 107                 listsw = 0;     /* HACK */
 108                 done (0);
 109
 110             case REVSW:
 111                 reverse = 1;
 112                 continue;
 113
 114             case CCSW:
 115             case DATESW:
 116             case FROMSW:
 117             case SUBJSW:
 118             case TOSW:
 119             case DATFDSW:
 120             case AFTRSW:
 121             case BEFRSW:
 122             case SRCHSW:
 123                 vec[vecp++] = --cp;
 124             pattern:
 125                 if (!(cp = *argp++))/* allow -xyz arguments */
 126                     adios (NULL, "missing argument to %s", argp[-2]);
 127                 vec[vecp++] = cp;
 128                 continue;
 129             case OTHRSW:
 130                 adios (NULL, "internal error!");
 131
 132             case ANDSW:
 133             case ORSW:
 134             case NOTSW:
 135             case LBRSW:
 136             case RBRSW:
 137                 vec[vecp++] = --cp;
 138                 continue;
 139
 140             case SEQSW:
 141                 if (!(cp = *argp++) || *cp == '-')
 142                     adios (NULL, "missing argument to %s", argp[-2]);
 143
 144                 if (!seq_nameok (cp))
 145                   done (1);
 146
 147                 svector_push_back (seqs, cp);
 148                 seqp++;
 149                 continue;
 150             case NSEQSW:
 151                 seqp = 0;
 152                 continue;
 153             case PUBLSW:
 154                 publicsw = 1;
 155                 continue;
 156             case NPUBLSW:
 157                 publicsw = 0;
 158                 continue;
 159             case ZEROSW:
 160                 zerosw++;
 161                 continue;
 162             case NZEROSW:
 163                 zerosw = 0;
 164                 continue;
 165
 166             case LISTSW:
 167                 listsw = 1;
 168                 continue;
 169             case NLISTSW:
 170                 listsw = 0;
 171                 continue;
 172
 173             case DEBUGSW:
 174                 ++debug;
 175                 continue;
 176             }
 177         }
 178         if (*cp == '+' || *cp == '@') {
 179             if (folder)
 180                 adios (NULL, "only one folder at a time!");
 181             else
 182                 folder = pluspath (cp);
 183         } else
 184                 app_msgarg(&msgs, cp);
 185     }
 186     vec[vecp] = NULL;
 187
 188     if (!context_find ("path"))
 189         free (path ("./", TFOLDER));
 190
 191     /*
 192      * If we didn't specify which messages to search,
 193      * then search the whole folder.
 194      */
 195     if (!msgs.size)
 196         app_msgarg(&msgs, "all");
 197
 198     if (!folder)
 199         folder = getfolder (1);
 200     maildir = m_maildir (folder);
 201
 202     if (chdir (maildir) == NOTOK)
 203         adios (maildir, "unable to change directory to");
 204
 205     /* read folder and create message structure */
 206     if (!(mp = folder_read (folder, 0)))
 207         adios (NULL, "unable to read folder %s", folder);
 208
 209     /* check for empty folder */
 210     if (mp->nummsg == 0)
 211         adios (NULL, "no messages in %s", folder);
 212
 213     /* parse all the message ranges/sequences and set SELECTED */
 214     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 215         if (!m_convert (mp, msgs.msgs[msgnum]))
 216             done (1);
 217
 218     /*
 219      * If we aren't saving the results to a sequence,
 220      * we default to list the results.
 221      */
 222     if (listsw == -1)
 223         listsw = !seqp;
 224
 225     if (publicsw == 1 && is_readonly(mp))
 226         adios (NULL, "folder %s is read-only, so -public not allowed", folder);
 227
 228     if (!pcompile (vec, NULL))
 229         done (1);
 230
 231     /* If printing message numbers to standard out, force line buffering on.
 232      */
 233     if (listsw)
 234         setvbuf (stdout, NULL, _IOLBF, 0);
 235
 236     /*
 237      * Scan through all the SELECTED messages and check for a
 238      * match.  If there is NOT a match, then add it to a list to
 239      * remove from the final sequence (it will make sense later)
 240      */
 241     if (!reverse) { /* Overflow or underflow is fine. */
 242         start = mp->lowsel;
 243         end = mp->hghsel + 1;
 244         inc = 1;
 245     } else {
 246         start = mp->hghsel;
 247         end = mp->lowsel - 1;
 248         inc = -1;
 249     }
 250     for (msgnum = start; msgnum != end; msgnum += inc) {
 251         if (is_selected (mp, msgnum)) {
 252             if ((fp = fopen (cp = m_name (msgnum), "r")) == NULL)
 253                 admonish (cp, "unable to read message");
 254             if (fp && pmatches (fp, msgnum, 0L, 0L, debug)) {
 255                 if (listsw)
 256                     printf ("%s\n", m_name (msgnum));
 257             } else {
 258                 app_msgnum(&nums, msgnum);
 259             }
 260             if (fp)
 261                 fclose (fp);
 262         }
 263     }
 264
 265     if (nums.size >= mp->numsel)
 266         adios (NULL, "no messages match specification");
 267
 268     /*
 269      * So, what's happening here?
 270      *
 271      * - Re-read the folder and sequences, but with locking.
 272      * - Recreate the original set of selected messages from the command line
 273      * - Set the previous sequence
 274      * - Remove any messages that did NOT result in hits from the selection
 275      * - Add to any new sequences
 276      */
 277
 278     if (!(mp2 = folder_read (folder, 1)))
 279         adios (NULL, "unable to reread folder %s", folder);
 280
 281     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 282         if (!m_convert (mp2, msgs.msgs[msgnum]))
 283             done (1);
 284     seq_setprev (mp2);  /* set the previous-sequence */
 285
 286     /*
 287      * Nums contains a list of messages that we did NOT match.  Remove
 288      * that from the selection.
 289      */
 290
 291     for (msgnum = 0; msgnum < nums.size; msgnum++) {
 292         unset_selected(mp2, nums.msgnums[msgnum]);
 293         mp2->numsel--;
 294     }
 295
 296     /*
 297      * Add the matching messages to sequences
 298      */
 299     if (seqp > 0) {
 300         for (seqp = 0; seqp < svector_size (seqs); seqp++)
 301             if (!seq_addsel (mp2, svector_at (seqs, seqp), publicsw, zerosw))
 302                 done (1);
 303     }
 304
 305     /*
 306      * Print total matched if not printing each matched message number.
 307      */
 308     if (!listsw) {
 309         printf ("%d hit%s\n", mp2->numsel, mp2->numsel == 1 ? "" : "s");
 310     }
 311
 312     svector_free (seqs);
 313     context_replace (pfolder, folder);  /* update current folder         */
 314     seq_save (mp2);                     /* synchronize message sequences */
 315     context_save ();                    /* save the context file         */
 316     folder_free (mp);                   /* free folder/message structure */
 317     folder_free (mp2);
 318     done (0);
 319     return 1;
 320 }
 321
 322
 323 static void
 324 putzero_done (int status)
 325 {
 326     if (listsw && status && !isatty (fileno (stdout)))
 327         printf ("0\n");
 328     exit (status);
 329 }