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, char_read = 0;
  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
  58     /*
  59      * Open the message we'll be scanning for components
  60      */
  61
  62     if ((tmp = fopen(inputfile, "r")) == NULL)
  63         adios (inputfile, "Unable to open");
  64
  65     /* Get new format string */
  66     nfs = new_fs (form, NULL, NULL);
  67     fmtsize = strlen (nfs) + 256;
  68
  69     /* Compile format string */
  70     (void) fmt_compile (nfs, &fmt, 1);
  71
  72     /*
  73      * Mark any components tagged as address components
  74      */
  75
  76     for (ap = addrcomps; *ap; ap++) {
  77         cptr = fmt_findcomp (*ap);
  78         if (cptr)
  79             cptr->c_type |= CT_ADDR;
  80     }
  81
  82     /*
  83      * Process our message and save all relevant components
  84      *
  85      * A lot of this is taken from replsbr.c; should we try to merge
  86      * these routines?
  87      */
  88
  89     for (state = FLD;;) {
  90         int msg_count = sizeof msgbuf;
  91         state = m_getfld(state, name, msgbuf, &msg_count, tmp);
  92         switch (state) {
  93             case FLD:
  94             case FLDPLUS:
  95                 /*
  96                  * If we find a component that we're interested in, save
  97                  * a copy.  We don't do all of that weird buffer switching
  98                  * that replout does.
  99                  */
 100
 101                 i = fmt_addcomptext(name, msgbuf);
 102                 if (i != -1) {
 103                     char_read += msg_count;
 104                     while (state == FLDPLUS) {
 105                         msg_count = sizeof msgbuf;
 106                         state = m_getfld(state, name, msgbuf, &msg_count, tmp);
 107                         fmt_appendcomp(i, name, msgbuf);
 108                         char_read += msg_count;
 109                     }
 110                 }
 111                 while (state == FLDPLUS)
 112                     msg_count = sizeof msgbuf;
 113                     state = m_getfld(state, name, msgbuf, &msg_count, tmp);
 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
 139     cptr = fmt_findcomp ("digest");
 140     if (cptr) {
 141         COMPFREE(cptr);
 142         cptr->c_text = getcpy(digest);
 143     }
 144     cptr = fmt_findcomp ("nmh-date");
 145     if (cptr) {
 146         COMPFREE(cptr);
 147         cptr->c_text = getcpy(dtimenow (0));
 148     }
 149     cptr = fmt_findcomp ("nmh-from");
 150     if (cptr) {
 151         COMPFREE(cptr);
 152         cptr->c_text = getcpy(from);
 153     }
 154     cptr = fmt_findcomp ("nmh-to");
 155     if (cptr) {
 156         COMPFREE(cptr);
 157         cptr->c_text = getcpy(to);
 158     }
 159     cptr = fmt_findcomp ("nmh-cc");
 160     if (cptr) {
 161         COMPFREE(cptr);
 162         cptr->c_text = getcpy(cc);
 163     }
 164     cptr = fmt_findcomp ("nmh-subject");
 165     if (cptr) {
 166         COMPFREE(cptr);
 167         cptr->c_text = getcpy(subject);
 168     }
 169     cptr = fmt_findcomp ("fcc");
 170     if (cptr) {
 171         COMPFREE(cptr);
 172         cptr->c_text = getcpy(fcc);
 173     }
 174
 175     cp = m_mktemp2(NULL, invo_name, NULL, &tmp);
 176     if (cp == NULL) adios("forw", "unable to create temporary file");
 177     strncpy (tmpfil, cp, sizeof(tmpfil));
 178     unlink (tmpfil);
 179     if ((in = dup (fileno (tmp))) == NOTOK)
 180         adios ("dup", "unable to");
 181
 182     line = mh_xmalloc ((unsigned) fmtsize);
 183     fmt_scan (fmt, line, fmtsize - 1, fmtsize, dat);
 184     fputs (line, tmp);
 185     free (line);
 186     if (fclose (tmp))
 187         adios (tmpfil, "error writing");
 188
 189     lseek (in, (off_t) 0, SEEK_SET);
 190
 191     /*
 192      * Free any component buffers that we allocated
 193      */
 194
 195     fmt_free(fmt, 1);
 196
 197     return in;
 198 }