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