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