xref: /aoo42x/main/soltools/checkdll/checkdll.c (revision 7ce20373)
1 /**************************************************************
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *   http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
19  *
20  *************************************************************/
21 
22 
23 
24 
25 #include <stdio.h>
26 #include <string.h>
27 #include <errno.h>
28 #include <unistd.h>
29 #include <dlfcn.h>
30 
31 /*
32  * NOTE: Since no one is really interested in correct unload behavior I've
33  * disabled the shared library unload check. If you want to reenable it comment
34  * the following line out
35  */
36 #define NO_UNLOAD_CHECK
37 
38 static const char *pprog_name 	= "checkdll";
39 static const char *psymbol		= "GetVersionInfo";
40 
usage()41 void usage()
42 {
43 	fprintf(stderr, "usage: %s [-s] <dllname>\n", pprog_name);
44 	return;
45 }
46 
main(int argc,char * argv[])47 int main(int argc, char *argv[])
48 {
49 	int 	rc;
50     int     silent=0;
51 	void	*phandle;
52 	char 	*(*pfun)(void);
53 
54 	if ( argc < 2 || argc > 4) {
55 		usage();
56 		return 1;
57 	}
58 
59     if ( !strcmp(argv[1],"-s") ) {
60         silent = 1;
61         ++argv, --argc;
62     }
63 
64 	if ( (rc = access( argv[1], R_OK )) == -1 ) {
65 		fprintf(stderr, "%s: ERROR: %s: %s\n",
66                 pprog_name, argv[1], strerror(errno));
67 		return 2;
68 	}
69 
70 	if (!silent) printf("Checking DLL %s ...", argv[1]);
71 	fflush(stdout);
72 
73 	if ( (phandle = dlopen(argv[1], RTLD_NOW)) != NULL ) {
74 		if  ( (pfun = (char *(*)(void))dlsym(phandle, psymbol)) != NULL ) {
75 			if (!silent) printf(": ok\n");
76 		}
77 		else
78 		{
79 			printf(": WARNING: %s\n", dlerror());
80 		}
81 #ifdef NO_UNLOAD_CHECK
82 		_exit(0);
83 #else
84 		dlclose(phandle);
85 #endif
86 		return 0;
87 	}
88 
89 	printf(": ERROR: %s\n", dlerror());
90 	return 3;
91 }
92 
93 
94