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

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