Showing the changes to sys/src/cmd/python/Python/dynload_shlib.c (1 of 3706 files). Show all
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| 1 | + | |
| 2 | +/* Support for dynamic loading of extension modules */ | |
| 3 | + | |
| 4 | +#include "Python.h" | |
| 5 | +#include "importdl.h" | |
| 6 | + | |
| 7 | +#include <sys/types.h> | |
| 8 | +#include <sys/stat.h> | |
| 9 | + | |
| 10 | +#if defined(__NetBSD__) | |
| 11 | +#include <sys/param.h> | |
| 12 | +#if (NetBSD < 199712) | |
| 13 | +#include <nlist.h> | |
| 14 | +#include <link.h> | |
| 15 | +#define dlerror() "error in dynamic linking" | |
| 16 | +#endif | |
| 17 | +#endif /* NetBSD */ | |
| 18 | + | |
| 19 | +#ifdef HAVE_DLFCN_H | |
| 20 | +#include <dlfcn.h> | |
| 21 | +#else | |
| 22 | +#if defined(PYOS_OS2) && defined(PYCC_GCC) | |
| 23 | +#include "dlfcn.h" | |
| 24 | +#endif | |
| 25 | +#endif | |
| 26 | + | |
| 27 | +#if (defined(__OpenBSD__) || defined(__NetBSD__)) && !defined(__ELF__) | |
| 28 | +#define LEAD_UNDERSCORE "_" | |
| 29 | +#else | |
| 30 | +#define LEAD_UNDERSCORE "" | |
| 31 | +#endif | |
| 32 | + | |
| 33 | + | |
| 34 | +const struct filedescr _PyImport_DynLoadFiletab[] = { | |
| 35 | +#ifdef __CYGWIN__ | |
| 36 | + {".dll", "rb", C_EXTENSION}, | |
| 37 | + {"module.dll", "rb", C_EXTENSION}, | |
| 38 | +#else | |
| 39 | +#if defined(PYOS_OS2) && defined(PYCC_GCC) | |
| 40 | + {".pyd", "rb", C_EXTENSION}, | |
| 41 | + {".dll", "rb", C_EXTENSION}, | |
| 42 | +#else | |
| 43 | +#ifdef __VMS | |
| 44 | + {".exe", "rb", C_EXTENSION}, | |
| 45 | + {".EXE", "rb", C_EXTENSION}, | |
| 46 | + {"module.exe", "rb", C_EXTENSION}, | |
| 47 | + {"MODULE.EXE", "rb", C_EXTENSION}, | |
| 48 | +#else | |
| 49 | + {".so", "rb", C_EXTENSION}, | |
| 50 | + {"module.so", "rb", C_EXTENSION}, | |
| 51 | +#endif | |
| 52 | +#endif | |
| 53 | +#endif | |
| 54 | + {0, 0} | |
| 55 | +}; | |
| 56 | + | |
| 57 | +static struct { | |
| 58 | + dev_t dev; | |
| 59 | +#ifdef __VMS | |
| 60 | + ino_t ino[3]; | |
| 61 | +#else | |
| 62 | + ino_t ino; | |
| 63 | +#endif | |
| 64 | + void *handle; | |
| 65 | +} handles[128]; | |
| 66 | +static int nhandles = 0; | |
| 67 | + | |
| 68 | + | |
| 69 | +dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname, | |
| 70 | + const char *pathname, FILE *fp) | |
| 71 | +{ | |
| 72 | + dl_funcptr p; | |
| 73 | + void *handle; | |
| 74 | + char funcname[258]; | |
| 75 | + char pathbuf[260]; | |
| 76 | + int dlopenflags=0; | |
| 77 | + | |
| 78 | + if (strchr(pathname, '/') == NULL) { | |
| 79 | + /* Prefix bare filename with "./" */ | |
| 80 | + PyOS_snprintf(pathbuf, sizeof(pathbuf), "./%-.255s", pathname); | |
| 81 | + pathname = pathbuf; | |
| 82 | + } | |
| 83 | + | |
| 84 | + PyOS_snprintf(funcname, sizeof(funcname), | |
| 85 | + LEAD_UNDERSCORE "init%.200s", shortname); | |
| 86 | + | |
| 87 | + if (fp != NULL) { | |
| 88 | + int i; | |
| 89 | + struct stat statb; | |
| 90 | + fstat(fileno(fp), &statb); | |
| 91 | + for (i = 0; i < nhandles; i++) { | |
| 92 | + if (statb.st_dev == handles[i].dev && | |
| 93 | + statb.st_ino == handles[i].ino) { | |
| 94 | + p = (dl_funcptr) dlsym(handles[i].handle, | |
| 95 | + funcname); | |
| 96 | + return p; | |
| 97 | + } | |
| 98 | + } | |
| 99 | + if (nhandles < 128) { | |
| 100 | + handles[nhandles].dev = statb.st_dev; | |
| 101 | +#ifdef __VMS | |
| 102 | + handles[nhandles].ino[0] = statb.st_ino[0]; | |
| 103 | + handles[nhandles].ino[1] = statb.st_ino[1]; | |
| 104 | + handles[nhandles].ino[2] = statb.st_ino[2]; | |
| 105 | +#else | |
| 106 | + handles[nhandles].ino = statb.st_ino; | |
| 107 | +#endif | |
| 108 | + } | |
| 109 | + } | |
| 110 | + | |
| 111 | +#if !(defined(PYOS_OS2) && defined(PYCC_GCC)) | |
| 112 | + dlopenflags = PyThreadState_GET()->interp->dlopenflags; | |
| 113 | +#endif | |
| 114 | + | |
| 115 | + if (Py_VerboseFlag) | |
| 116 | + PySys_WriteStderr("dlopen(\"%s\", %x);\n", pathname, | |
| 117 | + dlopenflags); | |
| 118 | + | |
| 119 | +#ifdef __VMS | |
| 120 | + /* VMS currently don't allow a pathname, use a logical name instead */ | |
| 121 | + /* Concatenate 'python_module_' and shortname */ | |
| 122 | + /* so "import vms.bar" will use the logical python_module_bar */ | |
| 123 | + /* As C module use only one name space this is probably not a */ | |
| 124 | + /* important limitation */ | |
| 125 | + PyOS_snprintf(pathbuf, sizeof(pathbuf), "python_module_%-.200s", | |
| 126 | + shortname); | |
| 127 | + pathname = pathbuf; | |
| 128 | +#endif | |
| 129 | + | |
| 130 | + handle = dlopen(pathname, dlopenflags); | |
| 131 | + | |
| 132 | + if (handle == NULL) { | |
| 133 | + const char *error = dlerror(); | |
| 134 | + if (error == NULL) | |
| 135 | + error = "unknown dlopen() error"; | |
| 136 | + PyErr_SetString(PyExc_ImportError, error); | |
| 137 | + return NULL; | |
| 138 | + } | |
| 139 | + if (fp != NULL && nhandles < 128) | |
| 140 | + handles[nhandles++].handle = handle; | |
| 141 | + p = (dl_funcptr) dlsym(handle, funcname); | |
| 142 | + return p; | |
| 143 | +} | |