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

   1
   2 /*
   3  * distsbr.c -- routines to do additional "dist-style" processing
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13 #include <fcntl.h>
  14 #include <h/utils.h>
  15
  16 static int  hdrfd = NOTOK;
  17 static int  txtfd = NOTOK;
  18
  19 #define BADHDR  "please re-edit %s to remove the ``%s'' header!"
  20 #define BADTXT  "please re-edit %s to consist of headers only!"
  21 #define BADMSG  "please re-edit %s to include a ``Resent-To:''!"
  22 #define BADRFT  "please re-edit %s and fix that header!"
  23
  24 /*
  25  * static prototypes
  26  */
  27 static void ready_msg(char *);
  28
  29 int
  30 distout (char *drft, char *msgnam, char *backup)
  31 {
  32     int state;
  33     register unsigned char *dp;
  34     register char *resent;
  35     char name[NAMESZ], buffer[BUFSIZ];
  36     register FILE *ifp, *ofp;
  37
  38     if (rename (drft, strcpy (backup, m_backup (drft))) == NOTOK)
  39         adios (backup, "unable to rename %s to",drft);
  40     if ((ifp = fopen (backup, "r")) == NULL)
  41         adios (backup, "unable to read");
  42
  43     if ((ofp = fopen (drft, "w")) == NULL)
  44         adios (drft, "unable to create temporary file");
  45     chmod (drft, m_gmprot ());
  46
  47     ready_msg (msgnam);
  48     lseek (hdrfd, (off_t) 0, SEEK_SET); /* msgnam not accurate */
  49     cpydata (hdrfd, fileno (ofp), msgnam, drft);
  50
  51     for (state = FLD, resent = NULL;;)
  52         switch (state =
  53                 m_getfld (state, name, buffer, sizeof buffer, ifp)) {
  54             case FLD:
  55             case FLDPLUS:
  56             case FLDEOF:
  57                 if (uprf (name, "distribute-"))
  58                     snprintf (name, sizeof(name), "%s%s", "Resent", &name[10]);
  59                 if (uprf (name, "distribution-"))
  60                     snprintf (name, sizeof(name), "%s%s", "Resent", &name[12]);
  61                 if (!uprf (name, "resent")) {
  62                     advise (NULL, BADHDR, "draft", name);
  63                     goto leave_bad;
  64                 }
  65                 if (state == FLD)
  66                     resent = add (":", add (name, resent));
  67                 resent = add (buffer, resent);
  68                 fprintf (ofp, "%s: %s", name, buffer);
  69                 while (state == FLDPLUS) {
  70                     state = m_getfld (state, name,
  71                             buffer, sizeof buffer, ifp);
  72                     resent = add (buffer, resent);
  73                     fputs (buffer, ofp);
  74                 }
  75                 if (state == FLDEOF)
  76                     goto process;
  77                 break;
  78
  79             case BODY:
  80             case BODYEOF:
  81                 for (dp = buffer; *dp; dp++)
  82                     if (!isspace (*dp)) {
  83                         advise (NULL, BADTXT, "draft");
  84                         goto leave_bad;
  85                     }
  86
  87             case FILEEOF:
  88                 goto process;
  89
  90             case LENERR:
  91             case FMTERR:
  92                 advise (NULL, BADRFT, "draft");
  93         leave_bad: ;
  94                 fclose (ifp);
  95                 fclose (ofp);
  96                 unlink (drft);
  97                 if (rename (backup, drft) == NOTOK)
  98                     adios (drft, "unable to rename %s to", backup);
  99                 return NOTOK;
 100
 101             default:
 102                 adios (NULL, "getfld() returned %d", state);
 103         }
 104 process: ;
 105     fclose (ifp);
 106     fflush (ofp);
 107
 108     if (!resent) {
 109         advise (NULL, BADMSG, "draft");
 110         fclose (ofp);
 111         unlink (drft);
 112         if (rename (backup, drft) == NOTOK)
 113             adios (drft, "unable to rename %s to", backup);
 114         return NOTOK;
 115     }
 116     free (resent);
 117
 118     if (txtfd != NOTOK) {
 119         lseek (txtfd, (off_t) 0, SEEK_SET); /* msgnam not accurate */
 120         cpydata (txtfd, fileno (ofp), msgnam, drft);
 121     }
 122
 123     fclose (ofp);
 124
 125     return OK;
 126 }
 127
 128
 129 static void
 130 ready_msg (char *msgnam)
 131 {
 132     int state, out;
 133     char name[NAMESZ], buffer[BUFSIZ], tmpfil[BUFSIZ];
 134     register FILE *ifp, *ofp;
 135
 136     if (hdrfd != NOTOK)
 137         close (hdrfd), hdrfd = NOTOK;
 138     if (txtfd != NOTOK)
 139         close (txtfd), txtfd = NOTOK;
 140
 141     if ((ifp = fopen (msgnam, "r")) == NULL)
 142         adios (msgnam, "unable to open message");
 143
 144     strncpy (tmpfil, m_tmpfil ("dist"), sizeof(tmpfil));
 145     if ((hdrfd = open (tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == NOTOK)
 146         adios (tmpfil, "unable to re-open temporary file");
 147     if ((out = dup (hdrfd)) == NOTOK
 148             || (ofp = fdopen (out, "w")) == NULL)
 149         adios (NULL, "no file descriptors -- you lose big");
 150     unlink (tmpfil);
 151
 152     for (state = FLD;;)
 153         switch (state =
 154                 m_getfld (state, name, buffer, sizeof buffer, ifp)) {
 155             case FLD:
 156             case FLDPLUS:
 157             case FLDEOF:
 158                 if (uprf (name, "resent"))
 159                     fprintf (ofp, "Prev-");
 160                 fprintf (ofp, "%s: %s", name, buffer);
 161                 while (state == FLDPLUS) {
 162                     state = m_getfld (state, name,
 163                             buffer, sizeof buffer, ifp);
 164                     fputs (buffer, ofp);
 165                 }
 166                 if (state == FLDEOF)
 167                     goto process;
 168                 break;
 169
 170             case BODY:
 171             case BODYEOF:
 172                 fclose (ofp);
 173
 174                 strncpy (tmpfil, m_tmpfil ("dist"), sizeof(tmpfil));
 175                 if ((txtfd = open (tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == NOTOK)
 176                     adios (tmpfil, "unable to open temporary file");
 177                 if ((out = dup (txtfd)) == NOTOK
 178                         || (ofp = fdopen (out, "w")) == NULL)
 179                     adios (NULL, "no file descriptors -- you lose big");
 180                 unlink (tmpfil);
 181                 fprintf (ofp, "\n%s", buffer);
 182                 while (state == BODY) {
 183                     state = m_getfld (state, name,
 184                             buffer, sizeof buffer, ifp);
 185                     fputs (buffer, ofp);
 186                 }
 187             case FILEEOF:
 188                 goto process;
 189
 190             case LENERR:
 191             case FMTERR:
 192                 adios (NULL, "format error in message %s", msgnam);
 193
 194             default:
 195                 adios (NULL, "getfld() returned %d", state);
 196         }
 197 process: ;
 198     fclose (ifp);
 199     fclose (ofp);
 200 }