1da2e3ebdSchin /***********************************************************************
2da2e3ebdSchin * *
3da2e3ebdSchin * This software is part of the ast package *
4*b30d1939SAndy Fiddaman * Copyright (c) 1997-2012 AT&T Intellectual Property *
5da2e3ebdSchin * and is licensed under the *
6*b30d1939SAndy Fiddaman * Eclipse Public License, Version 1.0 *
77c2fbfb3SApril Chin * by AT&T Intellectual Property *
8da2e3ebdSchin * *
9da2e3ebdSchin * A copy of the License is available at *
10*b30d1939SAndy Fiddaman * http://www.eclipse.org/org/documents/epl-v10.html *
11*b30d1939SAndy Fiddaman * (with md5 checksum b35adb5213ca9657e911e9befb180842) *
12da2e3ebdSchin * *
13da2e3ebdSchin * Information and Software Systems Research *
14da2e3ebdSchin * AT&T Research *
15da2e3ebdSchin * Florham Park NJ *
16da2e3ebdSchin * *
17da2e3ebdSchin * Glenn Fowler <gsf@research.att.com> *
18da2e3ebdSchin * *
19da2e3ebdSchin ***********************************************************************/
20da2e3ebdSchin #pragma prototyped
21da2e3ebdSchin /*
22da2e3ebdSchin * Glenn Fowler
23da2e3ebdSchin * AT&T Research
24da2e3ebdSchin */
25da2e3ebdSchin
26*b30d1939SAndy Fiddaman #include "dlllib.h"
27da2e3ebdSchin
28da2e3ebdSchin /*
29da2e3ebdSchin * find and load lib plugin/module library name with optional version ver and dlopen() flags
30da2e3ebdSchin * at least one dlopen() is called to initialize dlerror()
31da2e3ebdSchin * if path!=0 then library path up to size chars copied to path with trailing 0
32da2e3ebdSchin * if name contains a directory prefix then library search is limited to the dir and siblings
33da2e3ebdSchin */
34da2e3ebdSchin
35da2e3ebdSchin extern void*
dllplugin(const char * lib,const char * name,const char * ver,unsigned long rel,unsigned long * cur,int flags,char * path,size_t size)36*b30d1939SAndy Fiddaman dllplugin(const char* lib, const char* name, const char* ver, unsigned long rel, unsigned long* cur, int flags, char* path, size_t size)
37da2e3ebdSchin {
38da2e3ebdSchin void* dll;
39*b30d1939SAndy Fiddaman int err;
40da2e3ebdSchin int hit;
41da2e3ebdSchin Dllscan_t* dls;
42da2e3ebdSchin Dllent_t* dle;
43da2e3ebdSchin
44*b30d1939SAndy Fiddaman err = hit = 0;
45da2e3ebdSchin for (;;)
46da2e3ebdSchin {
47da2e3ebdSchin if (dls = dllsopen(lib, name, ver))
48da2e3ebdSchin {
49da2e3ebdSchin while (dle = dllsread(dls))
50da2e3ebdSchin {
51da2e3ebdSchin hit = 1;
52*b30d1939SAndy Fiddaman #if 0
53*b30d1939SAndy Fiddaman again:
54*b30d1939SAndy Fiddaman #endif
5534f9b3eeSRoland Mainz if (dll = dllopen(dle->path, flags|RTLD_GLOBAL|RTLD_PARENT))
56da2e3ebdSchin {
57*b30d1939SAndy Fiddaman if (!dllcheck(dll, dle->path, rel, cur))
58*b30d1939SAndy Fiddaman {
59*b30d1939SAndy Fiddaman err = state.error;
60*b30d1939SAndy Fiddaman dlclose(dll);
61*b30d1939SAndy Fiddaman dll = 0;
62*b30d1939SAndy Fiddaman continue;
63*b30d1939SAndy Fiddaman }
64da2e3ebdSchin if (path && size)
65*b30d1939SAndy Fiddaman strlcpy(path, dle->path, size);
66da2e3ebdSchin break;
67da2e3ebdSchin }
68da2e3ebdSchin else
69*b30d1939SAndy Fiddaman {
70*b30d1939SAndy Fiddaman #if 0
71*b30d1939SAndy Fiddaman /*
72*b30d1939SAndy Fiddaman * dlopen() should load implicit libraries
73*b30d1939SAndy Fiddaman * this code does that
74*b30d1939SAndy Fiddaman * but it doesn't help on galadriel
75*b30d1939SAndy Fiddaman */
76*b30d1939SAndy Fiddaman
77*b30d1939SAndy Fiddaman char* s;
78*b30d1939SAndy Fiddaman char* e;
79*b30d1939SAndy Fiddaman
80*b30d1939SAndy Fiddaman if ((s = dllerror(1)) && (e = strchr(s, ':')))
81*b30d1939SAndy Fiddaman {
82*b30d1939SAndy Fiddaman *e = 0;
83*b30d1939SAndy Fiddaman error(1, "AHA %s implicit", s);
84*b30d1939SAndy Fiddaman dll = dllplugin(lib, s, 0, 0, 0, flags, path, size);
85*b30d1939SAndy Fiddaman *e = ':';
86*b30d1939SAndy Fiddaman if (dll)
87*b30d1939SAndy Fiddaman {
88*b30d1939SAndy Fiddaman error(1, "AHA implicit %s => %s", s, path);
89*b30d1939SAndy Fiddaman goto again;
90*b30d1939SAndy Fiddaman }
91*b30d1939SAndy Fiddaman }
92*b30d1939SAndy Fiddaman #endif
93*b30d1939SAndy Fiddaman errorf("dll", NiL, 1, "dllplugin: %s dlopen failed: %s", dle->path, dllerror(1));
94*b30d1939SAndy Fiddaman err = state.error;
95*b30d1939SAndy Fiddaman }
96da2e3ebdSchin }
97da2e3ebdSchin dllsclose(dls);
98da2e3ebdSchin }
99da2e3ebdSchin if (hit)
100*b30d1939SAndy Fiddaman {
101*b30d1939SAndy Fiddaman if (!dll)
102*b30d1939SAndy Fiddaman state.error = err;
103da2e3ebdSchin return dll;
104*b30d1939SAndy Fiddaman }
105da2e3ebdSchin if (!lib)
106da2e3ebdSchin break;
107da2e3ebdSchin lib = 0;
108da2e3ebdSchin }
109*b30d1939SAndy Fiddaman if (dll = dllopen(name, flags))
110*b30d1939SAndy Fiddaman {
111*b30d1939SAndy Fiddaman if (!dllcheck(dll, name, rel, cur))
112*b30d1939SAndy Fiddaman {
113*b30d1939SAndy Fiddaman dlclose(dll);
114*b30d1939SAndy Fiddaman dll = 0;
115*b30d1939SAndy Fiddaman }
116*b30d1939SAndy Fiddaman else if (path && size)
117*b30d1939SAndy Fiddaman strlcpy(path, name, size);
118*b30d1939SAndy Fiddaman }
119da2e3ebdSchin return dll;
120da2e3ebdSchin }
121*b30d1939SAndy Fiddaman
122*b30d1939SAndy Fiddaman extern void*
dllplug(const char * lib,const char * name,const char * ver,int flags,char * path,size_t size)123*b30d1939SAndy Fiddaman dllplug(const char* lib, const char* name, const char* ver, int flags, char* path, size_t size)
124*b30d1939SAndy Fiddaman {
125*b30d1939SAndy Fiddaman return dllplugin(lib, name, ver, 0, NiL, flags, path, size);
126*b30d1939SAndy Fiddaman }
127