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

   1
   2 /*
   3  * distsbr.c -- routines to do additional "dist-style" processing
   4  *
   5  * This code is Copyright (c) 2002, 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/utils.h>
  13
  14 static int  hdrfd = NOTOK;
  15 static int  txtfd = NOTOK;
  16
  17 #define BADHDR  "please re-edit %s to remove the ``%s'' header!"
  18 #define BADTXT  "please re-edit %s to consist of headers only!"
  19 #define BADMSG  "please re-edit %s to include a ``Resent-To:''!"
  20 #define BADRFT  "please re-edit %s and fix that header!"
  21
  22 /*
  23  * static prototypes
  24  */
  25 static void ready_msg(char *);
  26
  27 int
  28 distout (char *drft, char *msgnam, char *backup)
  29 {
  30     int state;
  31     register unsigned char *dp;
  32     register char *resent;
  33     char name[NAMESZ], buffer[BUFSIZ];
  34     register FILE *ifp, *ofp;
  35
  36     if (rename (drft, strcpy (backup, m_backup (drft))) == NOTOK)
  37         adios (backup, "unable to rename %s to",drft);
  38     if ((ifp = fopen (backup, "r")) == NULL)
  39         adios (backup, "unable to read");
  40
  41     if ((ofp = fopen (drft, "w")) == NULL)
  42         adios (drft, "unable to create temporary file");
  43     chmod (drft, m_gmprot ());
  44
  45     ready_msg (msgnam);
  46     lseek (hdrfd, (off_t) 0, SEEK_SET); /* msgnam not accurate */
  47     cpydata (hdrfd, fileno (ofp), msgnam, drft);
  48
  49     for (state = FLD, resent = NULL;;) {
  50         int buffersz = sizeof buffer;
  51         switch (state = m_getfld (state, name, buffer, &buffersz, ifp)) {
  52             case FLD:
  53             case FLDPLUS:
  54             case FLDEOF:
  55                 if (uprf (name, "distribute-"))
  56                     snprintf (name, sizeof(name), "%s%s", "Resent", &name[10]);
  57                 if (uprf (name, "distribution-"))
  58                     snprintf (name, sizeof(name), "%s%s", "Resent", &name[12]);
  59                 if (!uprf (name, "resent")) {
  60                     advise (NULL, BADHDR, "draft", name);
  61                     goto leave_bad;
  62                 }
  63                 if (state == FLD)
  64                     resent = add (":", add (name, resent));
  65                 resent = add (buffer, resent);
  66                 fprintf (ofp, "%s: %s", name, buffer);
  67                 while (state == FLDPLUS) {
  68                     buffersz = sizeof buffer;
  69                     state = m_getfld (state, name, buffer, &buffersz, ifp);
  70                     resent = add (buffer, resent);
  71                     fputs (buffer, ofp);
  72                 }
  73                 if (state == FLDEOF)
  74                     goto process;
  75                 break;
  76
  77             case BODY:
  78             case BODYEOF:
  79                 for (dp = buffer; *dp; dp++)
  80                     if (!isspace (*dp)) {
  81                         advise (NULL, BADTXT, "draft");
  82                         goto leave_bad;
  83                     }
  84
  85             case FILEEOF:
  86                 goto process;
  87
  88             case LENERR:
  89             case FMTERR:
  90                 advise (NULL, BADRFT, "draft");
  91         leave_bad: ;
  92                 fclose (ifp);
  93                 fclose (ofp);
  94                 unlink (drft);
  95                 if (rename (backup, drft) == NOTOK)
  96                     adios (drft, "unable to rename %s to", backup);
  97                 return NOTOK;
  98
  99             default:
 100                 adios (NULL, "getfld() returned %d", state);
 101         }
 102     }
 103 process: ;
 104     fclose (ifp);
 105     fflush (ofp);
 106
 107     if (!resent) {
 108         advise (NULL, BADMSG, "draft");
 109         fclose (ofp);
 110         unlink (drft);
 111         if (rename (backup, drft) == NOTOK)
 112             adios (drft, "unable to rename %s to", backup);
 113         return NOTOK;
 114     }
 115     free (resent);
 116
 117     if (txtfd != NOTOK) {
 118         lseek (txtfd, (off_t) 0, SEEK_SET); /* msgnam not accurate */
 119         cpydata (txtfd, fileno (ofp), msgnam, drft);
 120     }
 121
 122     fclose (ofp);
 123
 124     return OK;
 125 }
 126
 127
 128 static void
 129 ready_msg (char *msgnam)
 130 {
 131     int state, out;
 132     char name[NAMESZ], buffer[BUFSIZ], tmpfil[BUFSIZ];
 133     register FILE *ifp, *ofp;
 134     char *cp = NULL;
 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     cp = m_mktemp2(NULL, "dist", &hdrfd, NULL);
 145     if (cp == NULL) {
 146         adios("distsbr", "unable to create temporary file");
 147     }
 148     fchmod(hdrfd, 0600);
 149     strncpy(tmpfil, cp, sizeof(tmpfil));
 150     if ((out = dup (hdrfd)) == NOTOK
 151             || (ofp = fdopen (out, "w")) == NULL)
 152         adios (NULL, "no file descriptors -- you lose big");
 153     unlink (tmpfil);
 154
 155     for (state = FLD;;) {
 156         int buffersz = sizeof buffer;
 157         switch (state = m_getfld (state, name, buffer, &buffersz, ifp)) {
 158             case FLD:
 159             case FLDPLUS:
 160             case FLDEOF:
 161                 if (uprf (name, "resent"))
 162                     fprintf (ofp, "Prev-");
 163                 fprintf (ofp, "%s: %s", name, buffer);
 164                 while (state == FLDPLUS) {
 165                     buffersz = sizeof buffer;
 166                     state = m_getfld (state, name, buffer, &buffersz, ifp);
 167                     fputs (buffer, ofp);
 168                 }
 169                 if (state == FLDEOF)
 170                     goto process;
 171                 break;
 172
 173             case BODY:
 174             case BODYEOF:
 175                 fclose (ofp);
 176
 177                 cp = m_mktemp2(NULL, "dist", &txtfd, NULL);
 178                 if (cp == NULL) {
 179                     adios("distsbr", "unable to create temporary file");
 180                 }
 181                 fchmod(txtfd, 0600);
 182                 strncpy (tmpfil, cp, sizeof(tmpfil));
 183                 if ((out = dup (txtfd)) == NOTOK
 184                         || (ofp = fdopen (out, "w")) == NULL)
 185                     adios (NULL, "no file descriptors -- you lose big");
 186                 unlink (tmpfil);
 187                 fprintf (ofp, "\n%s", buffer);
 188                 while (state == BODY) {
 189                     buffersz = sizeof buffer;
 190                     state = m_getfld (state, name, buffer, &buffersz, ifp);
 191                     fputs (buffer, ofp);
 192                 }
 193             case FILEEOF:
 194                 goto process;
 195
 196             case LENERR:
 197             case FMTERR:
 198                 adios (NULL, "format error in message %s", msgnam);
 199
 200             default:
 201                 adios (NULL, "getfld() returned %d", state);
 202         }
 203     }
 204 process: ;
 205     fclose (ifp);
 206     fclose (ofp);
 207 }