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#include <unistd.h>
#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];
int32_t 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);
}