minix/external/bsd/nvi/dist/common/dldb.c

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/* $NetBSD: dldb.c,v 1.2 2013/11/22 15:52:05 christos Exp $ */
#include "config.h"
#include <dlfcn.h>
#include "common.h"
#include "pathnames.h"
static void relocate __P(());
#define RELOC(func,returntype,args,proto,types) \
static returntype reloc_##func __P(proto); \
returntype (*nvi_##func) __P(proto) = reloc_##func; \
static returntype reloc_##func args \
types \
{ \
relocate(); \
return nvi_##func args; \
}
RELOC(db_create,int,(a,b,c),(DB **, DB_ENV *, u_int32_t),
DB**a;DB_ENV*b;u_int32_t c;)
RELOC(db_env_create,int,(a,b),(DB_ENV **, u_int32_t),DB_ENV ** a;u_int32_t b;);
RELOC(db_strerror,char *,(a),(int),int a;)
#define LOADSYM(func) \
if ((nvi_##func = dlsym(handle, #func)) == NULL) \
goto error;
static void
relocate()
{
void *handle = dlopen(_PATH_DB3, RTLD_LAZY);
if (!handle)
goto error;
LOADSYM(db_create)
LOADSYM(db_env_create)
LOADSYM(db_strerror)
return;
error:
fprintf(stderr, "Relocation error: %s\n", dlerror());
abort();
}