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annotate Python/dynload_shlib.c @ 19600:1cece743a708 legacy-trunk

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Removed some unreachable break statements to silence SGI compiler.
author Sjoerd Mullender <sjoerd@acm.org>
date Thu, 30 Aug 2001 14:05:20 +0000
parents 064de84385ca
children 4d2cb6eaa411
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Support for dynamic loading of extension modules */
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3
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4 #include "Python.h"
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5 #include "importdl.h"
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6
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7 #include <sys/types.h>
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8 #include <sys/stat.h>
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9 #if defined(__NetBSD__) && (NetBSD < 199712)
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10 #include <nlist.h>
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11 #include <link.h>
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12 #define dlerror() "error in dynamic linking"
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13 #else
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14 #ifdef HAVE_DLFCN_H
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15 #include <dlfcn.h>
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16 #endif
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17 #endif
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18
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19 #ifdef __OpenBSD__
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20 #define LEAD_UNDERSCORE "_"
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21 #else
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22 #define LEAD_UNDERSCORE ""
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23 #endif
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26 const struct filedescr _PyImport_DynLoadFiletab[] = {
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27 #ifdef __CYGWIN__
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28 {".dll", "rb", C_EXTENSION},
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29 {"module.dll", "rb", C_EXTENSION},
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30 #else
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31 {".so", "rb", C_EXTENSION},
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32 {"module.so", "rb", C_EXTENSION},
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33 #endif
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34 {0, 0}
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35 };
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36
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37 static struct {
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38 dev_t dev;
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39 ino_t ino;
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40 void *handle;
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41 } handles[128];
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42 static int nhandles = 0;
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43
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44
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45 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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46 const char *pathname, FILE *fp)
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47 {
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48 dl_funcptr p;
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49 void *handle;
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50 char funcname[258];
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51 char pathbuf[260];
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52 int dlopenflags=0;
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53
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54 if (strchr(pathname, '/') == NULL) {
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55 /* Prefix bare filename with "./" */
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56 sprintf(pathbuf, "./%-.255s", pathname);
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57 pathname = pathbuf;
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58 }
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59
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60 sprintf(funcname, LEAD_UNDERSCORE "init%.200s", shortname);
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61
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62 if (fp != NULL) {
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63 int i;
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64 struct stat statb;
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65 fstat(fileno(fp), &statb);
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66 for (i = 0; i < nhandles; i++) {
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67 if (statb.st_dev == handles[i].dev &&
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68 statb.st_ino == handles[i].ino) {
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69 p = (dl_funcptr) dlsym(handles[i].handle,
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70 funcname);
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71 return p;
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72 }
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73 }
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74 if (nhandles < 128) {
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75 handles[nhandles].dev = statb.st_dev;
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76 handles[nhandles].ino = statb.st_ino;
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77 }
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78 }
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79
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80 dlopenflags = PyThreadState_Get()->interp->dlopenflags;
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81
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82 if (Py_VerboseFlag)
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83 printf("dlopen(\"%s\", %x);\n", pathname, dlopenflags);
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84
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85 handle = dlopen(pathname, dlopenflags);
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86
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87 if (handle == NULL) {
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88 PyErr_SetString(PyExc_ImportError, dlerror());
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89 return NULL;
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90 }
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91 if (fp != NULL && nhandles < 128)
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92 handles[nhandles++].handle = handle;
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93 p = (dl_funcptr) dlsym(handle, funcname);
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94 return p;
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95 }