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 "picksbr.h"
  10 #include "sbr/m_name.h"
  11 #include "sbr/getarguments.h"
  12 #include "sbr/seq_setprev.h"
  13 #include "sbr/seq_save.h"
  14 #include "sbr/smatch.h"
  15 #include "sbr/m_convert.h"
  16 #include "sbr/getfolder.h"
  17 #include "sbr/folder_read.h"
  18 #include "sbr/folder_free.h"
  19 #include "sbr/context_save.h"
  20 #include "sbr/context_replace.h"
  21 #include "sbr/context_find.h"
  22 #include "sbr/ambigsw.h"
  23 #include "sbr/path.h"
  24 #include "sbr/print_version.h"
  25 #include "sbr/print_help.h"
  26 #include "sbr/seq_nameok.h"
  27 #include "sbr/seq_add.h"
  28 #include "sbr/error.h"
  29 #include "h/tws.h"
  30 #include "h/done.h"
  31 #include "h/utils.h"
  32 #include "sbr/m_maildir.h"
  33
  34 #define PICK_SWITCHES \
  35     X("reverse", 0, REVSW) \
  36     X("and", 0, ANDSW) \
  37     X("or", 0, ORSW) \
  38     X("not", 0, NOTSW) \
  39     X("lbrace", 0, LBRSW) \
  40     X("rbrace", 0, RBRSW) \
  41     X("cc  pattern", 0, CCSW) \
  42     X("date  pattern", 0, DATESW) \
  43     X("from  pattern", 0, FROMSW) \
  44     X("search  pattern", 0, SRCHSW) \
  45     X("subject  pattern", 0, SUBJSW) \
  46     X("to  pattern", 0, TOSW) \
  47     X("-othercomponent  pattern", 0, OTHRSW) \
  48     X("after date", 0, AFTRSW) \
  49     X("before date", 0, BEFRSW) \
  50     X("datefield field", 5, DATFDSW) \
  51     X("sequence name", 0, SEQSW) \
  52     X("nosequence", 0, NSEQSW) \
  53     X("public", 0, PUBLSW) \
  54     X("nopublic", 0, NPUBLSW) \
  55     X("zero", 0, ZEROSW) \
  56     X("nozero", 0, NZEROSW) \
  57     X("list", 0, LISTSW) \
  58     X("nolist", 0, NLISTSW) \
  59     X("debug", 0, DEBUGSW) \
  60     X("version", 0, VERSIONSW) \
  61     X("help", 0, HELPSW) \
  62
  63 #define X(sw, minchars, id) id,
  64 DEFINE_SWITCH_ENUM(PICK);
  65 #undef X
  66
  67 #define X(sw, minchars, id) { sw, minchars, id },
  68 DEFINE_SWITCH_ARRAY(PICK, switches);
  69 #undef X
  70
  71 static int listsw = -1;
  72
  73 static void putzero_done (int) NORETURN;
  74
  75 int
  76 main (int argc, char **argv)
  77 {
  78     int publicsw = -1;
  79     bool zerosw = true;
  80     int vecp = 0;
  81     size_t seqp = 0;
  82     int msgnum;
  83     char *maildir, *folder = NULL, buf[100];
  84     char *cp, **argp, **arguments;
  85     svector_t seqs = svector_create (0);
  86     char *vec[MAXARGS];
  87     struct msgs_array msgs = { 0, 0, NULL };
  88     struct msgnum_array nums = { 0, 0, NULL };
  89     struct msgs *mp, *mp2;
  90     FILE *fp;
  91     int debug = 0;
  92     bool reverse = false;
  93     int start, end, inc;
  94
  95     if (nmh_init(argv[0], true, true)) { return 1; }
  96
  97     set_done(putzero_done);
  98
  99     arguments = getarguments (invo_name, argc, argv, 1);
 100     argp = arguments;
 101
 102     while ((cp = *argp++)) {
 103         if (*cp == '-') {
 104             if (*++cp == '-') {
 105                 vec[vecp++] = --cp;
 106                 goto pattern;
 107             }
 108             switch (smatch (cp, switches)) {
 109             case AMBIGSW:
 110                 ambigsw (cp, switches);
 111                 listsw = 0;     /* HACK */
 112                 done (1);
 113             case UNKWNSW:
 114                 die("-%s unknown", cp);
 115
 116             case HELPSW:
 117                 snprintf (buf, sizeof(buf), "%s [+folder] [msgs] [switches]",
 118                           invo_name);
 119                 print_help (buf, switches, 1);
 120                 listsw = 0;     /* HACK */
 121                 done (0);
 122             case VERSIONSW:
 123                 print_version(invo_name);
 124                 listsw = 0;     /* HACK */
 125                 done (0);
 126
 127             case REVSW:
 128                 reverse = true;
 129                 continue;
 130
 131             case CCSW:
 132             case DATESW:
 133             case FROMSW:
 134             case SUBJSW:
 135             case TOSW:
 136             case DATFDSW:
 137             case AFTRSW:
 138             case BEFRSW:
 139             case SRCHSW:
 140                 vec[vecp++] = --cp;
 141             pattern:
 142                 if (!(cp = *argp++))/* allow -xyz arguments */
 143                     die("missing argument to %s", argp[-2]);
 144                 vec[vecp++] = cp;
 145                 continue;
 146             case OTHRSW:
 147                 die("internal error!");
 148
 149             case ANDSW:
 150             case ORSW:
 151             case NOTSW:
 152             case LBRSW:
 153             case RBRSW:
 154                 vec[vecp++] = --cp;
 155                 continue;
 156
 157             case SEQSW:
 158                 if (!(cp = *argp++) || *cp == '-')
 159                     die("missing argument to %s", argp[-2]);
 160
 161                 if (!seq_nameok (cp))
 162                   done (1);
 163
 164                 svector_push_back (seqs, cp);
 165                 seqp++;
 166                 continue;
 167             case NSEQSW:
 168                 seqp = 0;
 169                 continue;
 170             case PUBLSW:
 171                 publicsw = 1;
 172                 continue;
 173             case NPUBLSW:
 174                 publicsw = 0;
 175                 continue;
 176             case ZEROSW:
 177                 zerosw = true;
 178                 continue;
 179             case NZEROSW:
 180                 zerosw = false;
 181                 continue;
 182
 183             case LISTSW:
 184                 listsw = 1;
 185                 continue;
 186             case NLISTSW:
 187                 listsw = 0;
 188                 continue;
 189
 190             case DEBUGSW:
 191                 ++debug;
 192                 continue;
 193             }
 194         }
 195         if (*cp == '+' || *cp == '@') {
 196             if (folder)
 197                 die("only one folder at a time!");
 198             folder = pluspath (cp);
 199         } else
 200                 app_msgarg(&msgs, cp);
 201     }
 202     vec[vecp] = NULL;
 203
 204     if (!context_find ("path"))
 205         free (path ("./", TFOLDER));
 206
 207     /*
 208      * If we didn't specify which messages to search,
 209      * then search the whole folder.
 210      */
 211     if (!msgs.size)
 212         app_msgarg(&msgs, "all");
 213
 214     if (!folder)
 215         folder = getfolder (1);
 216     maildir = m_maildir (folder);
 217
 218     if (chdir (maildir) == NOTOK)
 219         adios (maildir, "unable to change directory to");
 220
 221     /* read folder and create message structure */
 222     if (!(mp = folder_read (folder, 0)))
 223         die("unable to read folder %s", folder);
 224
 225     /* check for empty folder */
 226     if (mp->nummsg == 0)
 227         die("no messages in %s", folder);
 228
 229     /* parse all the message ranges/sequences and set SELECTED */
 230     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 231         if (!m_convert (mp, msgs.msgs[msgnum]))
 232             done (1);
 233
 234     /*
 235      * If we aren't saving the results to a sequence,
 236      * we default to list the results.
 237      */
 238     if (listsw == -1)
 239         listsw = !seqp;
 240
 241     if (publicsw == 1 && is_readonly(mp))
 242         die("folder %s is read-only, so -public not allowed", folder);
 243
 244     if (!pcompile (vec, NULL))
 245         done (1);
 246
 247     /* If printing message numbers to standard out, force line buffering on.
 248      */
 249     if (listsw)
 250         setvbuf (stdout, NULL, _IOLBF, 0);
 251
 252     /*
 253      * Scan through all the SELECTED messages and check for a
 254      * match.  If there is NOT a match, then add it to a list to
 255      * remove from the final sequence (it will make sense later)
 256      */
 257     if (!reverse) { /* Overflow or underflow is fine. */
 258         start = mp->lowsel;
 259         end = mp->hghsel + 1;
 260         inc = 1;
 261     } else {
 262         start = mp->hghsel;
 263         end = mp->lowsel - 1;
 264         inc = -1;
 265     }
 266     for (msgnum = start; msgnum != end; msgnum += inc) {
 267         if (is_selected (mp, msgnum)) {
 268             if ((fp = fopen (cp = m_name (msgnum), "r")) == NULL)
 269                 admonish (cp, "unable to read message");
 270             if (fp && pmatches (fp, msgnum, 0L, 0L, debug)) {
 271                 if (listsw)
 272                     puts(m_name (msgnum));
 273             } else {
 274                 app_msgnum(&nums, msgnum);
 275             }
 276             if (fp)
 277                 fclose (fp);
 278         }
 279     }
 280
 281     if (nums.size >= mp->numsel)
 282         die("no messages match specification");
 283
 284     /*
 285      * So, what's happening here?
 286      *
 287      * - Re-read the folder and sequences, but with locking.
 288      * - Recreate the original set of selected messages from the command line
 289      * - Set the previous sequence
 290      * - Remove any messages that did NOT result in hits from the selection
 291      * - Add to any new sequences
 292      */
 293
 294     if (!(mp2 = folder_read (folder, 1)))
 295         die("unable to reread folder %s", folder);
 296
 297     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 298         if (!m_convert (mp2, msgs.msgs[msgnum]))
 299             done (1);
 300     seq_setprev (mp2);  /* set the previous-sequence */
 301
 302     /*
 303      * Nums contains a list of messages that we did NOT match.  Remove
 304      * that from the selection.
 305      */
 306
 307     for (msgnum = 0; msgnum < nums.size; msgnum++) {
 308         unset_selected(mp2, nums.msgnums[msgnum]);
 309         mp2->numsel--;
 310     }
 311
 312     /*
 313      * Add the matching messages to sequences
 314      */
 315     if (seqp > 0) {
 316         for (seqp = 0; seqp < svector_size (seqs); seqp++)
 317             if (!seq_addsel (mp2, svector_at (seqs, seqp), publicsw, zerosw))
 318                 done (1);
 319     }
 320
 321     /*
 322      * Print total matched if not printing each matched message number.
 323      */
 324     if (!listsw) {
 325         printf ("%d hit%s\n", mp2->numsel, PLURALS(mp2->numsel));
 326     }
 327
 328     svector_free (seqs);
 329     context_replace (pfolder, folder);  /* update current folder         */
 330     seq_save (mp2);                     /* synchronize message sequences */
 331     context_save ();                    /* save the context file         */
 332     folder_free (mp);                   /* free folder/message structure */
 333     folder_free (mp2);
 334     done (0);
 335     return 1;
 336 }
 337
 338
 339 static void NORETURN
 340 putzero_done (int status)
 341 {
 342     if (listsw && status && !isatty (fileno (stdout)))
 343         puts("0");
 344     exit (status);
 345 }