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/seq_setprev.h"
  10 #include "sbr/seq_save.h"
  11 #include "sbr/smatch.h"
  12 #include "sbr/m_convert.h"
  13 #include "sbr/getfolder.h"
  14 #include "sbr/folder_read.h"
  15 #include "sbr/folder_free.h"
  16 #include "sbr/context_save.h"
  17 #include "sbr/context_replace.h"
  18 #include "sbr/context_find.h"
  19 #include "sbr/ambigsw.h"
  20 #include "sbr/path.h"
  21 #include "sbr/print_version.h"
  22 #include "sbr/print_help.h"
  23 #include "sbr/seq_nameok.h"
  24 #include "sbr/seq_add.h"
  25 #include "sbr/error.h"
  26 #include "h/tws.h"
  27 #include "h/picksbr.h"
  28 #include "h/done.h"
  29 #include "h/utils.h"
  30 #include "sbr/m_maildir.h"
  31
  32 #define PICK_SWITCHES \
  33     X("reverse", 0, REVSW) \
  34     X("and", 0, ANDSW) \
  35     X("or", 0, ORSW) \
  36     X("not", 0, NOTSW) \
  37     X("lbrace", 0, LBRSW) \
  38     X("rbrace", 0, RBRSW) \
  39     X("cc  pattern", 0, CCSW) \
  40     X("date  pattern", 0, DATESW) \
  41     X("from  pattern", 0, FROMSW) \
  42     X("search  pattern", 0, SRCHSW) \
  43     X("subject  pattern", 0, SUBJSW) \
  44     X("to  pattern", 0, TOSW) \
  45     X("-othercomponent  pattern", 0, OTHRSW) \
  46     X("after date", 0, AFTRSW) \
  47     X("before date", 0, BEFRSW) \
  48     X("datefield field", 5, DATFDSW) \
  49     X("sequence name", 0, SEQSW) \
  50     X("nosequence", 0, NSEQSW) \
  51     X("public", 0, PUBLSW) \
  52     X("nopublic", 0, NPUBLSW) \
  53     X("zero", 0, ZEROSW) \
  54     X("nozero", 0, NZEROSW) \
  55     X("list", 0, LISTSW) \
  56     X("nolist", 0, NLISTSW) \
  57     X("debug", 0, DEBUGSW) \
  58     X("version", 0, VERSIONSW) \
  59     X("help", 0, HELPSW) \
  60
  61 #define X(sw, minchars, id) id,
  62 DEFINE_SWITCH_ENUM(PICK);
  63 #undef X
  64
  65 #define X(sw, minchars, id) { sw, minchars, id },
  66 DEFINE_SWITCH_ARRAY(PICK, switches);
  67 #undef X
  68
  69 static int listsw = -1;
  70
  71 static void putzero_done (int) NORETURN;
  72
  73 int
  74 main (int argc, char **argv)
  75 {
  76     int publicsw = -1;
  77     bool zerosw = true;
  78     int vecp = 0;
  79     size_t seqp = 0;
  80     int msgnum;
  81     char *maildir, *folder = NULL, buf[100];
  82     char *cp, **argp, **arguments;
  83     svector_t seqs = svector_create (0);
  84     char *vec[MAXARGS];
  85     struct msgs_array msgs = { 0, 0, NULL };
  86     struct msgnum_array nums = { 0, 0, NULL };
  87     struct msgs *mp, *mp2;
  88     FILE *fp;
  89     int debug = 0;
  90     bool reverse = false;
  91     int start, end, inc;
  92
  93     if (nmh_init(argv[0], true, true)) { return 1; }
  94
  95     set_done(putzero_done);
  96
  97     arguments = getarguments (invo_name, argc, argv, 1);
  98     argp = arguments;
  99
 100     while ((cp = *argp++)) {
 101         if (*cp == '-') {
 102             if (*++cp == '-') {
 103                 vec[vecp++] = --cp;
 104                 goto pattern;
 105             }
 106             switch (smatch (cp, switches)) {
 107             case AMBIGSW:
 108                 ambigsw (cp, switches);
 109                 listsw = 0;     /* HACK */
 110                 done (1);
 111             case UNKWNSW:
 112                 die("-%s unknown", cp);
 113
 114             case HELPSW:
 115                 snprintf (buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
 116                           invo_name);
 117                 print_help (buf, switches, 1);
 118                 listsw = 0;     /* HACK */
 119                 done (0);
 120             case VERSIONSW:
 121                 print_version(invo_name);
 122                 listsw = 0;     /* HACK */
 123                 done (0);
 124
 125             case REVSW:
 126                 reverse = true;
 127                 continue;
 128
 129             case CCSW:
 130             case DATESW:
 131             case FROMSW:
 132             case SUBJSW:
 133             case TOSW:
 134             case DATFDSW:
 135             case AFTRSW:
 136             case BEFRSW:
 137             case SRCHSW:
 138                 vec[vecp++] = --cp;
 139             pattern:
 140                 if (!(cp = *argp++))/* allow -xyz arguments */
 141                     die("missing argument to %s", argp[-2]);
 142                 vec[vecp++] = cp;
 143                 continue;
 144             case OTHRSW:
 145                 die("internal error!");
 146
 147             case ANDSW:
 148             case ORSW:
 149             case NOTSW:
 150             case LBRSW:
 151             case RBRSW:
 152                 vec[vecp++] = --cp;
 153                 continue;
 154
 155             case SEQSW:
 156                 if (!(cp = *argp++) || *cp == '-')
 157                     die("missing argument to %s", argp[-2]);
 158
 159                 if (!seq_nameok (cp))
 160                   done (1);
 161
 162                 svector_push_back (seqs, cp);
 163                 seqp++;
 164                 continue;
 165             case NSEQSW:
 166                 seqp = 0;
 167                 continue;
 168             case PUBLSW:
 169                 publicsw = 1;
 170                 continue;
 171             case NPUBLSW:
 172                 publicsw = 0;
 173                 continue;
 174             case ZEROSW:
 175                 zerosw = true;
 176                 continue;
 177             case NZEROSW:
 178                 zerosw = false;
 179                 continue;
 180
 181             case LISTSW:
 182                 listsw = 1;
 183                 continue;
 184             case NLISTSW:
 185                 listsw = 0;
 186                 continue;
 187
 188             case DEBUGSW:
 189                 ++debug;
 190                 continue;
 191             }
 192         }
 193         if (*cp == '+' || *cp == '@') {
 194             if (folder)
 195                 die("only one folder at a time!");
 196             folder = pluspath (cp);
 197         } else
 198                 app_msgarg(&msgs, cp);
 199     }
 200     vec[vecp] = NULL;
 201
 202     if (!context_find ("path"))
 203         free (path ("./", TFOLDER));
 204
 205     /*
 206      * If we didn't specify which messages to search,
 207      * then search the whole folder.
 208      */
 209     if (!msgs.size)
 210         app_msgarg(&msgs, "all");
 211
 212     if (!folder)
 213         folder = getfolder (1);
 214     maildir = m_maildir (folder);
 215
 216     if (chdir (maildir) == NOTOK)
 217         adios (maildir, "unable to change directory to");
 218
 219     /* read folder and create message structure */
 220     if (!(mp = folder_read (folder, 0)))
 221         die("unable to read folder %s", folder);
 222
 223     /* check for empty folder */
 224     if (mp->nummsg == 0)
 225         die("no messages in %s", folder);
 226
 227     /* parse all the message ranges/sequences and set SELECTED */
 228     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 229         if (!m_convert (mp, msgs.msgs[msgnum]))
 230             done (1);
 231
 232     /*
 233      * If we aren't saving the results to a sequence,
 234      * we default to list the results.
 235      */
 236     if (listsw == -1)
 237         listsw = !seqp;
 238
 239     if (publicsw == 1 && is_readonly(mp))
 240         die("folder %s is read-only, so -public not allowed", folder);
 241
 242     if (!pcompile (vec, NULL))
 243         done (1);
 244
 245     /* If printing message numbers to standard out, force line buffering on.
 246      */
 247     if (listsw)
 248         setvbuf (stdout, NULL, _IOLBF, 0);
 249
 250     /*
 251      * Scan through all the SELECTED messages and check for a
 252      * match.  If there is NOT a match, then add it to a list to
 253      * remove from the final sequence (it will make sense later)
 254      */
 255     if (!reverse) { /* Overflow or underflow is fine. */
 256         start = mp->lowsel;
 257         end = mp->hghsel + 1;
 258         inc = 1;
 259     } else {
 260         start = mp->hghsel;
 261         end = mp->lowsel - 1;
 262         inc = -1;
 263     }
 264     for (msgnum = start; msgnum != end; msgnum += inc) {
 265         if (is_selected (mp, msgnum)) {
 266             if ((fp = fopen (cp = m_name (msgnum), "r")) == NULL)
 267                 admonish (cp, "unable to read message");
 268             if (fp && pmatches (fp, msgnum, 0L, 0L, debug)) {
 269                 if (listsw)
 270                     puts(m_name (msgnum));
 271             } else {
 272                 app_msgnum(&nums, msgnum);
 273             }
 274             if (fp)
 275                 fclose (fp);
 276         }
 277     }
 278
 279     if (nums.size >= mp->numsel)
 280         die("no messages match specification");
 281
 282     /*
 283      * So, what's happening here?
 284      *
 285      * - Re-read the folder and sequences, but with locking.
 286      * - Recreate the original set of selected messages from the command line
 287      * - Set the previous sequence
 288      * - Remove any messages that did NOT result in hits from the selection
 289      * - Add to any new sequences
 290      */
 291
 292     if (!(mp2 = folder_read (folder, 1)))
 293         die("unable to reread folder %s", folder);
 294
 295     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 296         if (!m_convert (mp2, msgs.msgs[msgnum]))
 297             done (1);
 298     seq_setprev (mp2);  /* set the previous-sequence */
 299
 300     /*
 301      * Nums contains a list of messages that we did NOT match.  Remove
 302      * that from the selection.
 303      */
 304
 305     for (msgnum = 0; msgnum < nums.size; msgnum++) {
 306         unset_selected(mp2, nums.msgnums[msgnum]);
 307         mp2->numsel--;
 308     }
 309
 310     /*
 311      * Add the matching messages to sequences
 312      */
 313     if (seqp > 0) {
 314         for (seqp = 0; seqp < svector_size (seqs); seqp++)
 315             if (!seq_addsel (mp2, svector_at (seqs, seqp), publicsw, zerosw))
 316                 done (1);
 317     }
 318
 319     /*
 320      * Print total matched if not printing each matched message number.
 321      */
 322     if (!listsw) {
 323         printf ("%d hit%s\n", mp2->numsel, PLURALS(mp2->numsel));
 324     }
 325
 326     svector_free (seqs);
 327     context_replace (pfolder, folder);  /* update current folder         */
 328     seq_save (mp2);                     /* synchronize message sequences */
 329     context_save ();                    /* save the context file         */
 330     folder_free (mp);                   /* free folder/message structure */
 331     folder_free (mp2);
 332     done (0);
 333     return 1;
 334 }
 335
 336
 337 static void NORETURN
 338 putzero_done (int status)
 339 {
 340     if (listsw && status && !isatty (fileno (stdout)))
 341         puts("0");
 342     exit (status);
 343 }