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Die with a sensible error message if a symbol cannot be found.

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This commit is contained in:
pooka 2011-02-24 09:52:34 +00:00
parent 05e91bfee8
commit e1463ae3cd
1 changed files with 22 additions and 16 deletions
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38
lib/librumpclient/rumpclient.c
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@ -1,4 +1,4 @@
/* $NetBSD: rumpclient.c,v 1.33 2011/02/18 16:22:10 pooka Exp $ */
/* $NetBSD: rumpclient.c,v 1.34 2011/02/24 09:52:34 pooka Exp $ */
/*
* Copyright (c) 2010, 2011 Antti Kantee. All Rights Reserved.
@ -43,6 +43,7 @@ __RCSID("$NetBSD");
#include <assert.h>
#include <dlfcn.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <link.h>
@ -743,24 +744,29 @@ rumpclient_init()
*/
#define FINDSYM2(_name_,_syscall_) \
if ((host_##_name_ = rumpclient_dlsym(RTLD_NEXT, \
#_syscall_)) == NULL) \
/* host_##_name_ = _syscall_ */;
#_syscall_)) == NULL) { \
if (rumpclient_dlsym == dlsym) \
host_##_name_ = _name_; /* static fallback */ \
else \
errx(1, "cannot find %s: %s", #_syscall_, \
dlerror()); \
}
#define FINDSYM(_name_) FINDSYM2(_name_,_name_)
FINDSYM2(socket,__socket30);
FINDSYM(close);
FINDSYM(connect);
FINDSYM(fcntl);
FINDSYM(poll);
FINDSYM(read);
FINDSYM(sendto);
FINDSYM(setsockopt);
FINDSYM(dup);
FINDSYM(kqueue);
FINDSYM(execve);
FINDSYM2(socket,__socket30)
FINDSYM(close)
FINDSYM(connect)
FINDSYM(fcntl)
FINDSYM(poll)
FINDSYM(read)
FINDSYM(sendto)
FINDSYM(setsockopt)
FINDSYM(dup)
FINDSYM(kqueue)
FINDSYM(execve)
#if !__NetBSD_Prereq__(5,99,7)
FINDSYM(kevent);
FINDSYM(kevent)
#else
FINDSYM2(kevent,_sys___kevent50);
FINDSYM2(kevent,_sys___kevent50)
#endif
#undef FINDSYM
#undef FINDSY2