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/context_replace.h"
  10 #include "sbr/context_find.h"
  11 #include "sbr/ambigsw.h"
  12 #include "sbr/path.h"
  13 #include "sbr/print_version.h"
  14 #include "sbr/print_help.h"
  15 #include "sbr/seq_nameok.h"
  16 #include "sbr/seq_add.h"
  17 #include "sbr/error.h"
  18 #include "h/tws.h"
  19 #include "h/picksbr.h"
  20 #include "h/done.h"
  21 #include "h/utils.h"
  22 #include "sbr/m_maildir.h"
  23
  24 #define PICK_SWITCHES \
  25     X("reverse", 0, REVSW) \
  26     X("and", 0, ANDSW) \
  27     X("or", 0, ORSW) \
  28     X("not", 0, NOTSW) \
  29     X("lbrace", 0, LBRSW) \
  30     X("rbrace", 0, RBRSW) \
  31     X("cc  pattern", 0, CCSW) \
  32     X("date  pattern", 0, DATESW) \
  33     X("from  pattern", 0, FROMSW) \
  34     X("search  pattern", 0, SRCHSW) \
  35     X("subject  pattern", 0, SUBJSW) \
  36     X("to  pattern", 0, TOSW) \
  37     X("-othercomponent  pattern", 0, OTHRSW) \
  38     X("after date", 0, AFTRSW) \
  39     X("before date", 0, BEFRSW) \
  40     X("datefield field", 5, DATFDSW) \
  41     X("sequence name", 0, SEQSW) \
  42     X("nosequence", 0, NSEQSW) \
  43     X("public", 0, PUBLSW) \
  44     X("nopublic", 0, NPUBLSW) \
  45     X("zero", 0, ZEROSW) \
  46     X("nozero", 0, NZEROSW) \
  47     X("list", 0, LISTSW) \
  48     X("nolist", 0, NLISTSW) \
  49     X("debug", 0, DEBUGSW) \
  50     X("version", 0, VERSIONSW) \
  51     X("help", 0, HELPSW) \
  52
  53 #define X(sw, minchars, id) id,
  54 DEFINE_SWITCH_ENUM(PICK);
  55 #undef X
  56
  57 #define X(sw, minchars, id) { sw, minchars, id },
  58 DEFINE_SWITCH_ARRAY(PICK, switches);
  59 #undef X
  60
  61 static int listsw = -1;
  62
  63 static void putzero_done (int) NORETURN;
  64
  65 int
  66 main (int argc, char **argv)
  67 {
  68     int publicsw = -1;
  69     bool zerosw = true;
  70     int vecp = 0;
  71     size_t seqp = 0;
  72     int msgnum;
  73     char *maildir, *folder = NULL, buf[100];
  74     char *cp, **argp, **arguments;
  75     svector_t seqs = svector_create (0);
  76     char *vec[MAXARGS];
  77     struct msgs_array msgs = { 0, 0, NULL };
  78     struct msgnum_array nums = { 0, 0, NULL };
  79     struct msgs *mp, *mp2;
  80     FILE *fp;
  81     int debug = 0;
  82     bool reverse = false;
  83     int start, end, inc;
  84
  85     if (nmh_init(argv[0], true, true)) { return 1; }
  86
  87     set_done(putzero_done);
  88
  89     arguments = getarguments (invo_name, argc, argv, 1);
  90     argp = arguments;
  91
  92     while ((cp = *argp++)) {
  93         if (*cp == '-') {
  94             if (*++cp == '-') {
  95                 vec[vecp++] = --cp;
  96                 goto pattern;
  97             }
  98             switch (smatch (cp, switches)) {
  99             case AMBIGSW:
 100                 ambigsw (cp, switches);
 101                 listsw = 0;     /* HACK */
 102                 done (1);
 103             case UNKWNSW:
 104                 die("-%s unknown", cp);
 105
 106             case HELPSW:
 107                 snprintf (buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
 108                           invo_name);
 109                 print_help (buf, switches, 1);
 110                 listsw = 0;     /* HACK */
 111                 done (0);
 112             case VERSIONSW:
 113                 print_version(invo_name);
 114                 listsw = 0;     /* HACK */
 115                 done (0);
 116
 117             case REVSW:
 118                 reverse = true;
 119                 continue;
 120
 121             case CCSW:
 122             case DATESW:
 123             case FROMSW:
 124             case SUBJSW:
 125             case TOSW:
 126             case DATFDSW:
 127             case AFTRSW:
 128             case BEFRSW:
 129             case SRCHSW:
 130                 vec[vecp++] = --cp;
 131             pattern:
 132                 if (!(cp = *argp++))/* allow -xyz arguments */
 133                     die("missing argument to %s", argp[-2]);
 134                 vec[vecp++] = cp;
 135                 continue;
 136             case OTHRSW:
 137                 die("internal error!");
 138
 139             case ANDSW:
 140             case ORSW:
 141             case NOTSW:
 142             case LBRSW:
 143             case RBRSW:
 144                 vec[vecp++] = --cp;
 145                 continue;
 146
 147             case SEQSW:
 148                 if (!(cp = *argp++) || *cp == '-')
 149                     die("missing argument to %s", argp[-2]);
 150
 151                 if (!seq_nameok (cp))
 152                   done (1);
 153
 154                 svector_push_back (seqs, cp);
 155                 seqp++;
 156                 continue;
 157             case NSEQSW:
 158                 seqp = 0;
 159                 continue;
 160             case PUBLSW:
 161                 publicsw = 1;
 162                 continue;
 163             case NPUBLSW:
 164                 publicsw = 0;
 165                 continue;
 166             case ZEROSW:
 167                 zerosw = true;
 168                 continue;
 169             case NZEROSW:
 170                 zerosw = false;
 171                 continue;
 172
 173             case LISTSW:
 174                 listsw = 1;
 175                 continue;
 176             case NLISTSW:
 177                 listsw = 0;
 178                 continue;
 179
 180             case DEBUGSW:
 181                 ++debug;
 182                 continue;
 183             }
 184         }
 185         if (*cp == '+' || *cp == '@') {
 186             if (folder)
 187                 die("only one folder at a time!");
 188             folder = pluspath (cp);
 189         } else
 190                 app_msgarg(&msgs, cp);
 191     }
 192     vec[vecp] = NULL;
 193
 194     if (!context_find ("path"))
 195         free (path ("./", TFOLDER));
 196
 197     /*
 198      * If we didn't specify which messages to search,
 199      * then search the whole folder.
 200      */
 201     if (!msgs.size)
 202         app_msgarg(&msgs, "all");
 203
 204     if (!folder)
 205         folder = getfolder (1);
 206     maildir = m_maildir (folder);
 207
 208     if (chdir (maildir) == NOTOK)
 209         adios (maildir, "unable to change directory to");
 210
 211     /* read folder and create message structure */
 212     if (!(mp = folder_read (folder, 0)))
 213         die("unable to read folder %s", folder);
 214
 215     /* check for empty folder */
 216     if (mp->nummsg == 0)
 217         die("no messages in %s", folder);
 218
 219     /* parse all the message ranges/sequences and set SELECTED */
 220     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 221         if (!m_convert (mp, msgs.msgs[msgnum]))
 222             done (1);
 223
 224     /*
 225      * If we aren't saving the results to a sequence,
 226      * we default to list the results.
 227      */
 228     if (listsw == -1)
 229         listsw = !seqp;
 230
 231     if (publicsw == 1 && is_readonly(mp))
 232         die("folder %s is read-only, so -public not allowed", folder);
 233
 234     if (!pcompile (vec, NULL))
 235         done (1);
 236
 237     /* If printing message numbers to standard out, force line buffering on.
 238      */
 239     if (listsw)
 240         setvbuf (stdout, NULL, _IOLBF, 0);
 241
 242     /*
 243      * Scan through all the SELECTED messages and check for a
 244      * match.  If there is NOT a match, then add it to a list to
 245      * remove from the final sequence (it will make sense later)
 246      */
 247     if (!reverse) { /* Overflow or underflow is fine. */
 248         start = mp->lowsel;
 249         end = mp->hghsel + 1;
 250         inc = 1;
 251     } else {
 252         start = mp->hghsel;
 253         end = mp->lowsel - 1;
 254         inc = -1;
 255     }
 256     for (msgnum = start; msgnum != end; msgnum += inc) {
 257         if (is_selected (mp, msgnum)) {
 258             if ((fp = fopen (cp = m_name (msgnum), "r")) == NULL)
 259                 admonish (cp, "unable to read message");
 260             if (fp && pmatches (fp, msgnum, 0L, 0L, debug)) {
 261                 if (listsw)
 262                     puts(m_name (msgnum));
 263             } else {
 264                 app_msgnum(&nums, msgnum);
 265             }
 266             if (fp)
 267                 fclose (fp);
 268         }
 269     }
 270
 271     if (nums.size >= mp->numsel)
 272         die("no messages match specification");
 273
 274     /*
 275      * So, what's happening here?
 276      *
 277      * - Re-read the folder and sequences, but with locking.
 278      * - Recreate the original set of selected messages from the command line
 279      * - Set the previous sequence
 280      * - Remove any messages that did NOT result in hits from the selection
 281      * - Add to any new sequences
 282      */
 283
 284     if (!(mp2 = folder_read (folder, 1)))
 285         die("unable to reread folder %s", folder);
 286
 287     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 288         if (!m_convert (mp2, msgs.msgs[msgnum]))
 289             done (1);
 290     seq_setprev (mp2);  /* set the previous-sequence */
 291
 292     /*
 293      * Nums contains a list of messages that we did NOT match.  Remove
 294      * that from the selection.
 295      */
 296
 297     for (msgnum = 0; msgnum < nums.size; msgnum++) {
 298         unset_selected(mp2, nums.msgnums[msgnum]);
 299         mp2->numsel--;
 300     }
 301
 302     /*
 303      * Add the matching messages to sequences
 304      */
 305     if (seqp > 0) {
 306         for (seqp = 0; seqp < svector_size (seqs); seqp++)
 307             if (!seq_addsel (mp2, svector_at (seqs, seqp), publicsw, zerosw))
 308                 done (1);
 309     }
 310
 311     /*
 312      * Print total matched if not printing each matched message number.
 313      */
 314     if (!listsw) {
 315         printf ("%d hit%s\n", mp2->numsel, PLURALS(mp2->numsel));
 316     }
 317
 318     svector_free (seqs);
 319     context_replace (pfolder, folder);  /* update current folder         */
 320     seq_save (mp2);                     /* synchronize message sequences */
 321     context_save ();                    /* save the context file         */
 322     folder_free (mp);                   /* free folder/message structure */
 323     folder_free (mp2);
 324     done (0);
 325     return 1;
 326 }
 327
 328
 329 static void NORETURN
 330 putzero_done (int status)
 331 {
 332     if (listsw && status && !isatty (fileno (stdout)))
 333         puts("0");
 334     exit (status);
 335 }