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#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "buffer.h"
#include "exit.h"
#include "cdb_make.h"
#include "open.h"
#include "stralloc.h"
#include "getln.h"
#include "strerr.h"
#include "byte.h"
#include "scan.h"
#include "fmt.h"
#include "ip4.h"
#define FATAL "rbldns-data: fatal: "
void nomem(void)
{
strerr_die2x(111,FATAL,"out of memory");
}
int fd;
buffer b;
char bspace[1024];
int fdcdb;
struct cdb_make cdb;
static stralloc tmp;
static stralloc line;
int match = 1;
unsigned long linenum = 0;
char strnum[FMT_ULONG];
void syntaxerror(const char *why)
{
strnum[fmt_ulong(strnum,linenum)] = 0;
strerr_die4x(111,FATAL,"unable to parse data line ",strnum,why);
}
void die_datatmp(void)
{
strerr_die2sys(111,FATAL,"unable to create data.tmp: ");
}
int main()
{
char ip[4];
unsigned long u;
unsigned int j;
unsigned int k;
char ch;
umask(022);
fd = open_read("data");
if (fd == -1) strerr_die2sys(111,FATAL,"unable to open data: ");
buffer_init(&b,buffer_unixread,fd,bspace,sizeof bspace);
fdcdb = open_trunc("data.tmp");
if (fdcdb == -1) die_datatmp();
if (cdb_make_start(&cdb,fdcdb) == -1) die_datatmp();
while (match) {
++linenum;
if (getln(&b,&line,&match,'\n') == -1)
strerr_die2sys(111,FATAL,"unable to read line: ");
while (line.len) {
ch = line.s[line.len - 1];
if ((ch != ' ') && (ch != '\t') && (ch != '\n')) break;
--line.len;
}
if (!line.len) continue;
switch(line.s[0]) {
default:
syntaxerror(": unrecognized leading character");
case '#':
break;
case ':':
j = byte_chr(line.s + 1,line.len - 1,':');
if (j >= line.len - 1) syntaxerror(": missing colon");
if (ip4_scan(line.s + 1,ip) != j) syntaxerror(": malformed IP address");
if (!stralloc_copyb(&tmp,ip,4)) nomem();
if (!stralloc_catb(&tmp,line.s + j + 2,line.len - j - 2)) nomem();
if (cdb_make_add(&cdb,"",0,tmp.s,tmp.len) == -1)
die_datatmp();
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (!stralloc_0(&line)) nomem();
j = 0;
if (!stralloc_copys(&tmp,"")) nomem();
for (;;) {
k = scan_ulong(line.s + j,&u);
if (!k) break;
ch = u;
if (!stralloc_catb(&tmp,&ch,1)) nomem();
j += k;
if (line.s[j] != '.') break;
++j;
}
if (!stralloc_catb(&tmp,"\0\0\0\0",4)) nomem();
tmp.len = 4;
if (line.s[j] == '/')
scan_ulong(line.s + j + 1,&u);
else
u = 32;
if (u > 32) u = 32;
ch = u;
if (!stralloc_catb(&tmp,&ch,1)) nomem();
if (cdb_make_add(&cdb,tmp.s,tmp.len,"",0) == -1)
die_datatmp();
break;
}
}
if (cdb_make_finish(&cdb) == -1) die_datatmp();
if (fsync(fdcdb) == -1) die_datatmp();
if (close(fdcdb) == -1) die_datatmp(); /* NFS stupidity */
if (rename("data.tmp","data.cdb") == -1)
strerr_die2sys(111,FATAL,"unable to move data.tmp to data.cdb: ");
_exit(0);
}
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