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 "sbr/ambigsw.h"
  10 #include "sbr/path.h"
  11 #include "sbr/print_version.h"
  12 #include "sbr/print_help.h"
  13 #include "sbr/seq_nameok.h"
  14 #include "sbr/seq_add.h"
  15 #include "sbr/error.h"
  16 #include "h/tws.h"
  17 #include "h/picksbr.h"
  18 #include "h/done.h"
  19 #include "h/utils.h"
  20 #include "sbr/m_maildir.h"
  21
  22 #define PICK_SWITCHES \
  23     X("reverse", 0, REVSW) \
  24     X("and", 0, ANDSW) \
  25     X("or", 0, ORSW) \
  26     X("not", 0, NOTSW) \
  27     X("lbrace", 0, LBRSW) \
  28     X("rbrace", 0, RBRSW) \
  29     X("cc  pattern", 0, CCSW) \
  30     X("date  pattern", 0, DATESW) \
  31     X("from  pattern", 0, FROMSW) \
  32     X("search  pattern", 0, SRCHSW) \
  33     X("subject  pattern", 0, SUBJSW) \
  34     X("to  pattern", 0, TOSW) \
  35     X("-othercomponent  pattern", 0, OTHRSW) \
  36     X("after date", 0, AFTRSW) \
  37     X("before date", 0, BEFRSW) \
  38     X("datefield field", 5, DATFDSW) \
  39     X("sequence name", 0, SEQSW) \
  40     X("nosequence", 0, NSEQSW) \
  41     X("public", 0, PUBLSW) \
  42     X("nopublic", 0, NPUBLSW) \
  43     X("zero", 0, ZEROSW) \
  44     X("nozero", 0, NZEROSW) \
  45     X("list", 0, LISTSW) \
  46     X("nolist", 0, NLISTSW) \
  47     X("debug", 0, DEBUGSW) \
  48     X("version", 0, VERSIONSW) \
  49     X("help", 0, HELPSW) \
  50
  51 #define X(sw, minchars, id) id,
  52 DEFINE_SWITCH_ENUM(PICK);
  53 #undef X
  54
  55 #define X(sw, minchars, id) { sw, minchars, id },
  56 DEFINE_SWITCH_ARRAY(PICK, switches);
  57 #undef X
  58
  59 static int listsw = -1;
  60
  61 static void putzero_done (int) NORETURN;
  62
  63 int
  64 main (int argc, char **argv)
  65 {
  66     int publicsw = -1;
  67     bool zerosw = true;
  68     int vecp = 0;
  69     size_t seqp = 0;
  70     int msgnum;
  71     char *maildir, *folder = NULL, buf[100];
  72     char *cp, **argp, **arguments;
  73     svector_t seqs = svector_create (0);
  74     char *vec[MAXARGS];
  75     struct msgs_array msgs = { 0, 0, NULL };
  76     struct msgnum_array nums = { 0, 0, NULL };
  77     struct msgs *mp, *mp2;
  78     FILE *fp;
  79     int debug = 0;
  80     bool reverse = false;
  81     int start, end, inc;
  82
  83     if (nmh_init(argv[0], true, true)) { return 1; }
  84
  85     set_done(putzero_done);
  86
  87     arguments = getarguments (invo_name, argc, argv, 1);
  88     argp = arguments;
  89
  90     while ((cp = *argp++)) {
  91         if (*cp == '-') {
  92             if (*++cp == '-') {
  93                 vec[vecp++] = --cp;
  94                 goto pattern;
  95             }
  96             switch (smatch (cp, switches)) {
  97             case AMBIGSW:
  98                 ambigsw (cp, switches);
  99                 listsw = 0;     /* HACK */
 100                 done (1);
 101             case UNKWNSW:
 102                 die("-%s unknown", cp);
 103
 104             case HELPSW:
 105                 snprintf (buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
 106                           invo_name);
 107                 print_help (buf, switches, 1);
 108                 listsw = 0;     /* HACK */
 109                 done (0);
 110             case VERSIONSW:
 111                 print_version(invo_name);
 112                 listsw = 0;     /* HACK */
 113                 done (0);
 114
 115             case REVSW:
 116                 reverse = true;
 117                 continue;
 118
 119             case CCSW:
 120             case DATESW:
 121             case FROMSW:
 122             case SUBJSW:
 123             case TOSW:
 124             case DATFDSW:
 125             case AFTRSW:
 126             case BEFRSW:
 127             case SRCHSW:
 128                 vec[vecp++] = --cp;
 129             pattern:
 130                 if (!(cp = *argp++))/* allow -xyz arguments */
 131                     die("missing argument to %s", argp[-2]);
 132                 vec[vecp++] = cp;
 133                 continue;
 134             case OTHRSW:
 135                 die("internal error!");
 136
 137             case ANDSW:
 138             case ORSW:
 139             case NOTSW:
 140             case LBRSW:
 141             case RBRSW:
 142                 vec[vecp++] = --cp;
 143                 continue;
 144
 145             case SEQSW:
 146                 if (!(cp = *argp++) || *cp == '-')
 147                     die("missing argument to %s", argp[-2]);
 148
 149                 if (!seq_nameok (cp))
 150                   done (1);
 151
 152                 svector_push_back (seqs, cp);
 153                 seqp++;
 154                 continue;
 155             case NSEQSW:
 156                 seqp = 0;
 157                 continue;
 158             case PUBLSW:
 159                 publicsw = 1;
 160                 continue;
 161             case NPUBLSW:
 162                 publicsw = 0;
 163                 continue;
 164             case ZEROSW:
 165                 zerosw = true;
 166                 continue;
 167             case NZEROSW:
 168                 zerosw = false;
 169                 continue;
 170
 171             case LISTSW:
 172                 listsw = 1;
 173                 continue;
 174             case NLISTSW:
 175                 listsw = 0;
 176                 continue;
 177
 178             case DEBUGSW:
 179                 ++debug;
 180                 continue;
 181             }
 182         }
 183         if (*cp == '+' || *cp == '@') {
 184             if (folder)
 185                 die("only one folder at a time!");
 186             folder = pluspath (cp);
 187         } else
 188                 app_msgarg(&msgs, cp);
 189     }
 190     vec[vecp] = NULL;
 191
 192     if (!context_find ("path"))
 193         free (path ("./", TFOLDER));
 194
 195     /*
 196      * If we didn't specify which messages to search,
 197      * then search the whole folder.
 198      */
 199     if (!msgs.size)
 200         app_msgarg(&msgs, "all");
 201
 202     if (!folder)
 203         folder = getfolder (1);
 204     maildir = m_maildir (folder);
 205
 206     if (chdir (maildir) == NOTOK)
 207         adios (maildir, "unable to change directory to");
 208
 209     /* read folder and create message structure */
 210     if (!(mp = folder_read (folder, 0)))
 211         die("unable to read folder %s", folder);
 212
 213     /* check for empty folder */
 214     if (mp->nummsg == 0)
 215         die("no messages in %s", folder);
 216
 217     /* parse all the message ranges/sequences and set SELECTED */
 218     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 219         if (!m_convert (mp, msgs.msgs[msgnum]))
 220             done (1);
 221
 222     /*
 223      * If we aren't saving the results to a sequence,
 224      * we default to list the results.
 225      */
 226     if (listsw == -1)
 227         listsw = !seqp;
 228
 229     if (publicsw == 1 && is_readonly(mp))
 230         die("folder %s is read-only, so -public not allowed", folder);
 231
 232     if (!pcompile (vec, NULL))
 233         done (1);
 234
 235     /* If printing message numbers to standard out, force line buffering on.
 236      */
 237     if (listsw)
 238         setvbuf (stdout, NULL, _IOLBF, 0);
 239
 240     /*
 241      * Scan through all the SELECTED messages and check for a
 242      * match.  If there is NOT a match, then add it to a list to
 243      * remove from the final sequence (it will make sense later)
 244      */
 245     if (!reverse) { /* Overflow or underflow is fine. */
 246         start = mp->lowsel;
 247         end = mp->hghsel + 1;
 248         inc = 1;
 249     } else {
 250         start = mp->hghsel;
 251         end = mp->lowsel - 1;
 252         inc = -1;
 253     }
 254     for (msgnum = start; msgnum != end; msgnum += inc) {
 255         if (is_selected (mp, msgnum)) {
 256             if ((fp = fopen (cp = m_name (msgnum), "r")) == NULL)
 257                 admonish (cp, "unable to read message");
 258             if (fp && pmatches (fp, msgnum, 0L, 0L, debug)) {
 259                 if (listsw)
 260                     puts(m_name (msgnum));
 261             } else {
 262                 app_msgnum(&nums, msgnum);
 263             }
 264             if (fp)
 265                 fclose (fp);
 266         }
 267     }
 268
 269     if (nums.size >= mp->numsel)
 270         die("no messages match specification");
 271
 272     /*
 273      * So, what's happening here?
 274      *
 275      * - Re-read the folder and sequences, but with locking.
 276      * - Recreate the original set of selected messages from the command line
 277      * - Set the previous sequence
 278      * - Remove any messages that did NOT result in hits from the selection
 279      * - Add to any new sequences
 280      */
 281
 282     if (!(mp2 = folder_read (folder, 1)))
 283         die("unable to reread folder %s", folder);
 284
 285     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 286         if (!m_convert (mp2, msgs.msgs[msgnum]))
 287             done (1);
 288     seq_setprev (mp2);  /* set the previous-sequence */
 289
 290     /*
 291      * Nums contains a list of messages that we did NOT match.  Remove
 292      * that from the selection.
 293      */
 294
 295     for (msgnum = 0; msgnum < nums.size; msgnum++) {
 296         unset_selected(mp2, nums.msgnums[msgnum]);
 297         mp2->numsel--;
 298     }
 299
 300     /*
 301      * Add the matching messages to sequences
 302      */
 303     if (seqp > 0) {
 304         for (seqp = 0; seqp < svector_size (seqs); seqp++)
 305             if (!seq_addsel (mp2, svector_at (seqs, seqp), publicsw, zerosw))
 306                 done (1);
 307     }
 308
 309     /*
 310      * Print total matched if not printing each matched message number.
 311      */
 312     if (!listsw) {
 313         printf ("%d hit%s\n", mp2->numsel, PLURALS(mp2->numsel));
 314     }
 315
 316     svector_free (seqs);
 317     context_replace (pfolder, folder);  /* update current folder         */
 318     seq_save (mp2);                     /* synchronize message sequences */
 319     context_save ();                    /* save the context file         */
 320     folder_free (mp);                   /* free folder/message structure */
 321     folder_free (mp2);
 322     done (0);
 323     return 1;
 324 }
 325
 326
 327 static void NORETURN
 328 putzero_done (int status)
 329 {
 330     if (listsw && status && !isatty (fileno (stdout)))
 331         puts("0");
 332     exit (status);
 333 }