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