printforward.c

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#include <unistd.h>
#include "buffer.h"
#include "logmsg.h"
#include "stralloc.h"
#include "cdbread.h"
 
#define WHO "printmaillist"
 
static void badformat()
{
  logmsg(WHO,100,FATAL,"bad database format");
}
static void nomem()
{
  logmsg(WHO,111,FATAL,"out of memory");
}
 
static void getch(char *ch)
{
  int r;
  r = buffer_get(buffer_0small,ch,1);
  if (r == -1)
    logmsg(WHO,111,FATAL,"unable to read input");
  if (r == 0)
    badformat();
}
 
static void out(char *ch)
{
  if (buffer_put(buffer_1small,ch,1) == -1)
    logmsg(WHO,111,FATAL,"unable to write output");
}
 
static void printbuf(char *buf)
{
  while (*buf)
    out(buf++);
}
 
static void printsafe(char *buf,int len)
{
  char ch;
 
  while (len) {
    ch = *buf;
    if ((ch <= 32) || (ch == ',') || (ch == ':') || (ch == ';') || (ch == '\\') || (ch == '#'))
      out("\\");
    out(&ch);
    ++buf;
    --len;
  }
}
 
stralloc key = {0};
stralloc data = {0};
 
int main()
{
  uint32 eod;
  uint32 pos;
  uint32 klen;
  uint32 dlen;
  char buf[8];
  char ch;
  int i;
  int j;
 
  for (i = 0; i < 4; ++i) 
    getch(buf + i);
  eod = cdb_unpack(buf);
 
  for (i = 4; i < 2048; ++i) 
    getch(&ch);
 
  pos = 2048;
  while (pos < eod) {
    if (eod - pos < 8) badformat();
    pos += 8;
    for (i = 0; i < 8; ++i) getch(buf + i);
    klen = cdb_unpack(buf);
    dlen = cdb_unpack(buf + 4);
 
    if (!stralloc_copys(&key,"")) nomem();
    if (eod - pos < klen) badformat();
    pos += klen;
    while (klen) {
      --klen;
      getch(&ch);
      if (!stralloc_append(&key,&ch)) nomem();
    }
 
    if (eod - pos < dlen) badformat();
    pos += dlen;
    if (!stralloc_copys(&data,"")) nomem();
    while (dlen) {
      --dlen;
      getch(&ch);
      if (!stralloc_append(&data,&ch)) nomem();
    }
 
    if (!key.len) badformat();
    if (key.s[0] == '?') {
      printsafe(key.s + 1,key.len - 1);
      printbuf(": ?");
      printsafe(data.s,data.len);
      printbuf(";\n");
    }
    else if (key.s[0] == ':') {
      printsafe(key.s + 1,key.len - 1);
      printbuf(":\n");
 
      i = 0;
      for (j = 0; j < data.len; ++j)
        if (!data.s[j]) {
          if ((data.s[i] == '.') || (data.s[i] == '/')) {
            printbuf(", ");
            printsafe(data.s + i,j - i);
            printbuf("\n");
          }
          else if ((data.s[i] == '|') || (data.s[i] == '!')) {
            printbuf(", ");
            printsafe(data.s + i,j - i);
            printbuf("\n");
          }
          else if ((data.s[i] == '&') && (j - i < 900)) {
            printbuf(", ");
            printsafe(data.s + i,j - i);
            printbuf("\n");
          }
          else badformat();
          i = j + 1;
        }
      if (i != j) badformat();
      printbuf(";\n");
    }
    else badformat();
  }
 
  if (buffer_flush(buffer_1small) == -1)
    logmsg(WHO,111,FATAL,"unable to write output");
  _exit(0);
}