diplodocus.org Git - nmh/blob - uip/forwsbr.c

   1
   2 /*
   3  * forwsbr.c -- subroutine to build a draft from a component file
   4  *
   5  * This code is Copyright (c) 2012, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <fcntl.h>
  12 #include <h/fmt_scan.h>
  13 #include <h/tws.h>
  14 #include <h/utils.h>
  15
  16 /*
  17  * Take from replsbr.c - a buffer big enough to read in data header lines
  18  * in reasonable chunks but not enough to slurp in the whole message
  19  */
  20
  21 static char msgbuf[256];
  22 #define COMPFREE(c) if (c->c_text) free(c->c_text)
  23
  24 /*
  25  * A list of components we treat as addresses
  26  */
  27
  28 static char *addrcomps[] = {
  29     "from",
  30     "sender",
  31     "reply-to",
  32     "to",
  33     "cc",
  34     "bcc",
  35     "resent-from",
  36     "resent-sender",
  37     "resent-reply-to",
  38     "resent-to",
  39     "resent-cc",
  40     "resent-bcc",
  41     NULL
  42 };
  43
  44 int
  45 build_form (char *form, char *digest, int *dat, char *from, char *to,
  46             char *cc, char *fcc, char *subject, char *inputfile)
  47 {
  48     int in;
  49     int fmtsize, state;
  50     int i;
  51     register char *nfs;
  52     char *line, tmpfil[BUFSIZ], name[NAMESZ], **ap;
  53     FILE *tmp;
  54     register struct comp *cptr;
  55     struct format *fmt;
  56     char *cp = NULL;
  57     m_getfld_state_t gstate = 0;
  58
  59     /*
  60      * Open the message we'll be scanning for components
  61      */
  62
  63     if ((tmp = fopen(inputfile, "r")) == NULL)
  64         adios (inputfile, "Unable to open");
  65
  66     /* Get new format string */
  67     nfs = new_fs (form, NULL, NULL);
  68     fmtsize = strlen (nfs) + 256;
  69
  70     /* Compile format string */
  71     (void) fmt_compile (nfs, &fmt, 1);
  72
  73     /*
  74      * Mark any components tagged as address components
  75      */
  76
  77     for (ap = addrcomps; *ap; ap++) {
  78         cptr = fmt_findcomp (*ap);
  79         if (cptr)
  80             cptr->c_type |= CT_ADDR;
  81     }
  82
  83     /*
  84      * Process our message and save all relevant components
  85      *
  86      * A lot of this is taken from replsbr.c; should we try to merge
  87      * these routines?
  88      */
  89
  90     for (;;) {
  91         int msg_count = sizeof msgbuf;
  92         state = m_getfld (&gstate, name, msgbuf, &msg_count, tmp);
  93         switch (state) {
  94             case FLD:
  95             case FLDPLUS:
  96                 /*
  97                  * If we find a component that we're interested in, save
  98                  * a copy.  We don't do all of that weird buffer switching
  99                  * that replout does.
 100                  */
 101
 102                 i = fmt_addcomptext(name, msgbuf);
 103                 if (i != -1) {
 104                     while (state == FLDPLUS) {
 105                         msg_count = sizeof msgbuf;
 106                         state = m_getfld (&gstate, name, msgbuf, &msg_count, tmp);
 107                         fmt_appendcomp(i, name, msgbuf);
 108                     }
 109                 }
 110                 while (state == FLDPLUS) {
 111                     msg_count = sizeof msgbuf;
 112                     state = m_getfld (&gstate, name, msgbuf, &msg_count, tmp);
 113                 }
 114                 break;
 115
 116             case LENERR:
 117             case FMTERR:
 118             case BODY:
 119             case FILEEOF:
 120                 goto finished;
 121
 122             default:
 123                 adios(NULL, "m_getfld() returned %d", state);
 124         }
 125     }
 126
 127     /*
 128      * Override any components just in case they were included in the
 129      * input message.  Also include command-line components given here
 130      *
 131      * With the memory rework I've changed things so we always get copies
 132      * of these strings; I don't like the idea that the caller of this
 133      * function has to know to pass in already-allocated memory (and that
 134      * it will be free()'d by us).
 135      */
 136
 137 finished:
 138     m_getfld_state_destroy (&gstate);
 139
 140     cptr = fmt_findcomp ("digest");
 141     if (cptr) {
 142         COMPFREE(cptr);
 143         cptr->c_text = getcpy(digest);
 144     }
 145     cptr = fmt_findcomp ("nmh-date");
 146     if (cptr) {
 147         COMPFREE(cptr);
 148         cptr->c_text = getcpy(dtimenow (0));
 149     }
 150     cptr = fmt_findcomp ("nmh-from");
 151     if (cptr) {
 152         COMPFREE(cptr);
 153         cptr->c_text = getcpy(from);
 154     }
 155     cptr = fmt_findcomp ("nmh-to");
 156     if (cptr) {
 157         COMPFREE(cptr);
 158         cptr->c_text = getcpy(to);
 159     }
 160     cptr = fmt_findcomp ("nmh-cc");
 161     if (cptr) {
 162         COMPFREE(cptr);
 163         cptr->c_text = getcpy(cc);
 164     }
 165     cptr = fmt_findcomp ("nmh-subject");
 166     if (cptr) {
 167         COMPFREE(cptr);
 168         cptr->c_text = getcpy(subject);
 169     }
 170     cptr = fmt_findcomp ("fcc");
 171     if (cptr) {
 172         COMPFREE(cptr);
 173         cptr->c_text = getcpy(fcc);
 174     }
 175
 176     cp = m_mktemp2(NULL, invo_name, NULL, &tmp);
 177     if (cp == NULL) adios("forw", "unable to create temporary file");
 178     strncpy (tmpfil, cp, sizeof(tmpfil));
 179     unlink (tmpfil);
 180     if ((in = dup (fileno (tmp))) == NOTOK)
 181         adios ("dup", "unable to");
 182
 183     line = mh_xmalloc ((unsigned) fmtsize);
 184     fmt_scan (fmt, line, fmtsize - 1, fmtsize, dat, NULL);
 185     fputs (line, tmp);
 186     free (line);
 187     if (fclose (tmp))
 188         adios (tmpfil, "error writing");
 189
 190     lseek (in, (off_t) 0, SEEK_SET);
 191
 192     /*
 193      * Free any component buffers that we allocated
 194      */
 195
 196     fmt_free(fmt, 1);
 197
 198     return in;
 199 }