#include "exit.h"

#include "scan.h"

#include "str.h"

#include "buffer.h"

#include "strerr.h"

#include "cdb.h"

#define FATAL "cdbget: fatal: "

void die_read(void)

{

  strerr_die2sys(111,FATAL,"unable to read input: ");

}

void die_write(void)

{

  strerr_die2sys(111,FATAL,"unable to write output: ");

}

void die_usage(void)

{

  strerr_die1x(111,"cdbget: usage: cdbget key [skip]");

}

static struct cdb c;

char buf[1024];

main(int argc,char **argv)

{

  char *key;

  int r;

  uint32 pos;

  uint32 len;

  unsigned long u = 0;

  if (!*argv) die_usage();

  if (!*++argv) die_usage();

  key = *argv;

  if (*++argv) {

    scan_ulong(*argv,&u);

  }

  cdb_init(&c,0);

  cdb_findstart(&c);

  for (;;) {

    r = cdb_findnext(&c,key,str_len(key));

    if (r == -1) die_read();

    if (!r) _exit(100);

    if (!u) break;

    --u;

  }

  pos = cdb_datapos(&c);

  len = cdb_datalen(&c);

  while (len > 0) {

    r = sizeof buf;

    if (r > len) r = len;

    if (cdb_read(&c,buf,r,pos) == -1) die_read();

    if (buffer_put(buffer_1small,buf,r) == -1) die_write();

    pos += r;

    len -= r;

  }

  if (buffer_flush(buffer_1small) == -1) die_write();

  _exit(0);

}