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