Commit | Line | Data |
c692d670 |
1 | #include "dlfcn.h" |
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2 | #include "string.h" |
3 | #include "stdio.h" |
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4 | |
5 | #define INCL_BASE |
6 | #include <os2.h> |
7 | |
8 | static ULONG retcode; |
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9 | static char fail[300]; |
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10 | |
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11 | char *os2error(int rc); |
12 | |
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13 | void * |
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14 | dlopen(const char *path, int mode) |
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15 | { |
16 | HMODULE handle; |
17 | char tmp[260], *beg, *dot; |
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18 | ULONG rc; |
19 | |
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20 | fail[0] = 0; |
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21 | if ((rc = DosLoadModule(fail, sizeof fail, (char*)path, &handle)) == 0) |
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22 | return (void *)handle; |
23 | |
24 | retcode = rc; |
25 | |
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26 | if (strlen(path) >= sizeof(tmp)) |
27 | return NULL; |
28 | |
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29 | /* Not found. Check for non-FAT name and try truncated name. */ |
30 | /* Don't know if this helps though... */ |
31 | for (beg = dot = path + strlen(path); |
32 | beg > path && !strchr(":/\\", *(beg-1)); |
33 | beg--) |
34 | if (*beg == '.') |
35 | dot = beg; |
36 | if (dot - beg > 8) { |
37 | int n = beg+8-path; |
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38 | |
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39 | memmove(tmp, path, n); |
40 | memmove(tmp+n, dot, strlen(dot)+1); |
41 | if (DosLoadModule(fail, sizeof fail, tmp, &handle) == 0) |
42 | return (void *)handle; |
43 | } |
44 | |
45 | return NULL; |
46 | } |
47 | |
48 | void * |
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49 | dlsym(void *handle, const char *symbol) |
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50 | { |
51 | ULONG rc, type; |
52 | PFN addr; |
53 | |
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54 | fail[0] = 0; |
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55 | rc = DosQueryProcAddr((HMODULE)handle, 0, symbol, &addr); |
56 | if (rc == 0) { |
57 | rc = DosQueryProcType((HMODULE)handle, 0, symbol, &type); |
58 | if (rc == 0 && type == PT_32BIT) |
59 | return (void *)addr; |
60 | rc = ERROR_CALL_NOT_IMPLEMENTED; |
61 | } |
62 | retcode = rc; |
63 | return NULL; |
64 | } |
65 | |
66 | char * |
67 | dlerror(void) |
68 | { |
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69 | static char buf[700]; |
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70 | ULONG len; |
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71 | char *err; |
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72 | |
73 | if (retcode == 0) |
74 | return NULL; |
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75 | err = os2error(retcode); |
76 | len = strlen(err); |
77 | if (len > sizeof(buf) - 1) |
78 | len = sizeof(buf) - 1; |
79 | strncpy(buf, err, len+1); |
80 | if (fail[0] && len < 300) |
81 | sprintf(buf + len, ", possible problematic module: '%s'", fail); |
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82 | retcode = 0; |
83 | return buf; |
84 | } |
85 | |
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86 | int |
87 | dlclose(void *handle) |
88 | { |
89 | ULONG rc; |
90 | |
91 | if ((rc = DosFreeModule((HMODULE)handle)) == 0) return 0; |
92 | |
93 | retcode = rc; |
94 | return 2; |
95 | } |