dso.c

Apache V2.0.15 Alpha For Linuxhttpd-2_0_15-alpha.tar.Z

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 */

#include "dso.h"
#include "apr_strings.h"

#if APR_HAS_DSO

#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
#if APR_HAVE_STRING_H
#include <string.h> /* for strerror() on HP-UX */
#endif

static apr_status_t dso_cleanup(void *thedso)
{
    apr_dso_handle_t *dso = thedso;

    if (dso->handle == NULL)
        return APR_SUCCESS;

#if defined(HPUX) || defined(HPUX10) || defined(HPUX11)
    shl_unload((shl_t)dso->handle);
#else
    if (dlclose(dso->handle) != 0)
        return APR_EINIT;
#endif
    dso->handle = NULL;

    return APR_SUCCESS;
}

APR_DECLARE(apr_status_t) apr_dso_load(apr_dso_handle_t **res_handle, 
                                       const char *path, apr_pool_t *ctx)
{
#if defined(HPUX) || defined(HPUX10) || defined(HPUX11)
    shl_t os_handle = shl_load(path, BIND_IMMEDIATE|BIND_VERBOSE|BIND_NOSTART, 0L);
#elif defined(OSF1) || defined(SEQUENT) || defined(SNI) ||\
    (defined(__FreeBSD_version) && (__FreeBSD_version >= 220000))
    void *os_handle = dlopen((char *)path, RTLD_NOW | RTLD_GLOBAL);
#else
    void *os_handle = dlopen(path, RTLD_NOW | RTLD_GLOBAL);
#endif    

    *res_handle = apr_pcalloc(ctx, sizeof(**res_handle));

    if(os_handle == NULL) {
#if defined(HPUX) || defined(HPUX10) || defined(HPUX11)
        (*res_handle)->errormsg = strerror(errno);
        return errno;
#else
        (*res_handle)->errormsg = dlerror();
        return APR_EDSOOPEN;
#endif
    }

    (*res_handle)->handle = (void*)os_handle;
    (*res_handle)->cont = ctx;
    (*res_handle)->errormsg = NULL;

    apr_pool_cleanup_register(ctx, *res_handle, dso_cleanup, apr_pool_cleanup_null);

    return APR_SUCCESS;
}
    
APR_DECLARE(apr_status_t) apr_dso_unload(apr_dso_handle_t *handle)
{
    return apr_pool_cleanup_run(handle->cont, handle, dso_cleanup);
}

APR_DECLARE(apr_status_t) apr_dso_sym(apr_dso_handle_sym_t *ressym, 
                                      apr_dso_handle_t *handle, 
                                      const char *symname)
{
#if defined(HPUX) || defined(HPUX10) || defined(HPUX11)
    void *symaddr = NULL;
    int status;

    errno = 0;
    status = shl_findsym((shl_t *)&handle->handle, symname, TYPE_PROCEDURE, &symaddr);
    if (status == -1 && errno == 0) /* try TYPE_DATA instead */
        status = shl_findsym((shl_t *)&handle->handle, symname, TYPE_DATA, &symaddr);
    if (status = -1)
        return APR_EINIT;
    *ressym = symaddr;
    return APR_SUCCESS;
#else /* not HP-UX; use dlsym()/dlerror() */

#if defined(DLSYM_NEEDS_UNDERSCORE)
    void *retval;
    char *symbol = (char*)malloc(sizeof(char)*(strlen(symname)+2));
    sprintf(symbol, "_%s", symname);
    retval = dlsym(handle->handle, symbol);
    free(symbol);

#elif defined(SEQUENT) || defined(SNI)
    void *retval = dlsym(handle->handle, (char *)symname);
#else
    void *retval = dlsym(handle->handle, symname);
#endif

    if (retval == NULL) {
        handle->errormsg = dlerror();
        return APR_EINIT;
    }

    *ressym = retval;
    
    return APR_SUCCESS;
#endif /* not HP-UX; use dlsym()/dlerror() */
}

APR_DECLARE(const char *) apr_dso_error(apr_dso_handle_t *dso, char *buffer, apr_size_t buflen)
{
    if (dso->errormsg) {
        apr_cpystrn(buffer, dso->errormsg, buflen);
        return dso->errormsg;
    }
    return "No Error";
}

#endif