bsd.c
上传用户:blenddy
上传日期:2007-01-07
资源大小:6495k
文件大小:3k
- /*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)dl.c 5.4 (Berkeley) 2/23/91";
- #endif /* LIBC_SCCS and not lint */
- #include <sys/types.h>
- #include <nlist.h>
- #include <link.h>
- #include <dlfcn.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include "dynloader.h"
- static char error_message[BUFSIZ];
- char *
- BSD44_derived_dlerror(void)
- {
- static char ret[BUFSIZ];
- strcpy(ret, error_message);
- error_message[0] = 0;
- return (ret[0] == 0) ? (char *) NULL : ret;
- }
- void *
- BSD44_derived_dlopen(const char *file, int num)
- {
- #if defined(__mips__) || (defined(__NetBSD__) && defined(vax))
- sprintf(error_message, "dlopen (%s) not supported", file);
- return NULL;
- #else
- void *vp;
- if ((vp = dlopen((char *) file, num)) == (void *) NULL)
- sprintf(error_message, "dlopen (%s) failed", file);
- return vp;
- #endif
- }
- void *
- BSD44_derived_dlsym(void *handle, const char *name)
- {
- #if defined(__mips__) || (defined(__NetBSD__) && defined(vax))
- sprintf(error_message, "dlsym (%s) failed", name);
- return NULL;
- #elif defined(__ELF__)
- return dlsym(handle, name);
- #else
- void *vp;
- char buf[BUFSIZ];
- if (*name != '_')
- {
- sprintf(buf, "_%s", name);
- name = buf;
- }
- if ((vp = dlsym(handle, (char *) name)) == (void *) NULL)
- sprintf(error_message, "dlsym (%s) failed", name);
- return vp;
- #endif
- }
- void
- BSD44_derived_dlclose(void *handle)
- {
- #if defined(__mips__) || (defined(__NetBSD__) && defined(vax))
- #else
- dlclose(handle);
- #endif
- }