Mercurial > cpython-lru_cache-weakref

annotate Python/dynload_shlib.c @ 23252:4f335ca3f11c legacy-trunk

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Ignore SIGXFSZ. The SIGXFSZ signal is sent when the maximum file size limit is exceeded (RLIMIT_FSIZE). Apparently, it is also sent when the 2GB file limit is reached on platforms without large file support. The default action for SIGXFSZ is to terminate the process and dump core. When it is ignored, the system call that caused the limit to be exceeded returns an error and sets errno to EFBIG. Python always checks errno on I/O syscalls, so there is nothing to do with the signal.
author Jeremy Hylton <jeremy@alum.mit.edu>
date Tue, 23 Apr 2002 20:31:01 +0000
parents 5cbcfde3ad55
children ac487a7f7f2c
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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
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10 #if defined(__NetBSD__)
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11 #include <sys/param.h>
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12 #if (NetBSD < 199712)
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13 #include <nlist.h>
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14 #include <link.h>
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15 #define dlerror() "error in dynamic linking"
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16 #endif
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17 #endif /* NetBSD */
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19 #ifdef HAVE_DLFCN_H
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20 #include <dlfcn.h>
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21 #else
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22 #if defined(PYOS_OS2) && defined(PYCC_GCC)
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23 #include "dlfcn.h"
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24 #endif
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25 #endif
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26
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27 #if (defined(__OpenBSD__) || defined(__NetBSD__)) && !defined(__ELF__)
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28 #define LEAD_UNDERSCORE "_"
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29 #else
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30 #define LEAD_UNDERSCORE ""
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31 #endif
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34 const struct filedescr _PyImport_DynLoadFiletab[] = {
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35 #ifdef __CYGWIN__
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36 {".dll", "rb", C_EXTENSION},
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37 {"module.dll", "rb", C_EXTENSION},
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38 #else
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39 #if defined(PYOS_OS2) && defined(PYCC_GCC)
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40 {".pyd", "rb", C_EXTENSION},
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41 {".dll", "rb", C_EXTENSION},
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42 #else
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43 {".so", "rb", C_EXTENSION},
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44 {"module.so", "rb", C_EXTENSION},
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45 #endif
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46 #endif
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47 {0, 0}
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48 };
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49
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50 static struct {
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51 dev_t dev;
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52 ino_t ino;
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53 void *handle;
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54 } handles[128];
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55 static int nhandles = 0;
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56
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57
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58 dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
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59 const char *pathname, FILE *fp)
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60 {
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61 dl_funcptr p;
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62 void *handle;
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63 char funcname[258];
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64 char pathbuf[260];
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65 int dlopenflags=0;
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66
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67 if (strchr(pathname, '/') == NULL) {
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68 /* Prefix bare filename with "./" */
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69 PyOS_snprintf(pathbuf, sizeof(pathbuf), "./%-.255s", pathname);
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70 pathname = pathbuf;
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71 }
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72
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73 PyOS_snprintf(funcname, sizeof(funcname),
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74 LEAD_UNDERSCORE "init%.200s", shortname);
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75
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76 if (fp != NULL) {
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77 int i;
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78 struct stat statb;
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79 fstat(fileno(fp), &statb);
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80 for (i = 0; i < nhandles; i++) {
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81 if (statb.st_dev == handles[i].dev &&
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82 statb.st_ino == handles[i].ino) {
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83 p = (dl_funcptr) dlsym(handles[i].handle,
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84 funcname);
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85 return p;
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86 }
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87 }
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88 if (nhandles < 128) {
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89 handles[nhandles].dev = statb.st_dev;
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90 handles[nhandles].ino = statb.st_ino;
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91 }
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92 }
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93
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94 #if !(defined(PYOS_OS2) && defined(PYCC_GCC))
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95 dlopenflags = PyThreadState_Get()->interp->dlopenflags;
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96 #endif
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97
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98 if (Py_VerboseFlag)
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99 printf("dlopen(\"%s\", %x);\n", pathname, dlopenflags);
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100
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101 handle = dlopen(pathname, dlopenflags);
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102
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103 if (handle == NULL) {
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104 PyErr_SetString(PyExc_ImportError, dlerror());
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105 return NULL;
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106 }
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107 if (fp != NULL && nhandles < 128)
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108 handles[nhandles++].handle = handle;
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109 p = (dl_funcptr) dlsym(handle, funcname);
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110 return p;
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111 }