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1 /* |
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2 osutil.c - native operating system services |
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3 |
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4 Copyright 2007 Matt Mackall and others |
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5 |
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6 This software may be used and distributed according to the terms of |
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7 the GNU General Public License, incorporated herein by reference. |
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8 */ |
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9 |
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10 #define _ATFILE_SOURCE |
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11 #define _LARGEFILE64_SOURCE |
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12 #include <alloca.h> |
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13 #include <dirent.h> |
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14 #include <fcntl.h> |
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15 #include <string.h> |
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16 #include <sys/stat.h> |
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17 #include <sys/types.h> |
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18 #include <unistd.h> |
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19 |
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20 #include "Python.h" |
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21 |
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22 struct listdir_stat { |
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23 PyObject_HEAD |
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24 struct stat st; |
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25 }; |
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26 |
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27 #define listdir_slot(name) \ |
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28 static PyObject *listdir_stat_##name(PyObject *self, void *x) \ |
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29 { \ |
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30 return PyInt_FromLong(((struct listdir_stat *) self)->st.name); \ |
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31 } |
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32 |
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33 listdir_slot(st_dev); |
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34 listdir_slot(st_mode); |
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35 listdir_slot(st_nlink); |
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36 listdir_slot(st_size); |
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37 listdir_slot(st_mtime); |
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38 listdir_slot(st_ctime); |
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39 |
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40 static struct PyGetSetDef listdir_stat_getsets[] = { |
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41 {"st_dev", listdir_stat_st_dev, 0, 0, 0}, |
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42 {"st_mode", listdir_stat_st_mode, 0, 0, 0}, |
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43 {"st_nlink", listdir_stat_st_nlink, 0, 0, 0}, |
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44 {"st_size", listdir_stat_st_size, 0, 0, 0}, |
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45 {"st_mtime", listdir_stat_st_mtime, 0, 0, 0}, |
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46 {"st_ctime", listdir_stat_st_ctime, 0, 0, 0}, |
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47 {0, 0, 0, 0, 0} |
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48 }; |
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49 |
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50 static PyObject *listdir_stat_new(PyTypeObject *t, PyObject *a, PyObject *k) |
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51 { |
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52 return (*t->tp_alloc)(t, 0); |
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53 } |
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54 |
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55 static void listdir_stat_dealloc(PyObject *o) |
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56 { |
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57 (*o->ob_type->tp_free)(o); |
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58 } |
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59 |
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60 static PyTypeObject listdir_stat_type = { |
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61 PyObject_HEAD_INIT(NULL) |
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62 0, /*ob_size*/ |
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63 "osutil.stat", /*tp_name*/ |
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64 sizeof(struct listdir_stat), /*tp_basicsize*/ |
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65 0, /*tp_itemsize*/ |
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66 (destructor)listdir_stat_dealloc, /*tp_dealloc*/ |
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67 0, /*tp_print*/ |
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68 0, /*tp_getattr*/ |
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69 0, /*tp_setattr*/ |
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70 0, /*tp_compare*/ |
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71 0, /*tp_repr*/ |
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72 0, /*tp_as_number*/ |
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73 0, /*tp_as_sequence*/ |
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74 0, /*tp_as_mapping*/ |
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75 0, /*tp_hash */ |
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76 0, /*tp_call*/ |
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77 0, /*tp_str*/ |
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78 0, /*tp_getattro*/ |
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79 0, /*tp_setattro*/ |
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80 0, /*tp_as_buffer*/ |
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81 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
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82 "stat objects", /* tp_doc */ |
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83 0, /* tp_traverse */ |
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84 0, /* tp_clear */ |
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85 0, /* tp_richcompare */ |
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86 0, /* tp_weaklistoffset */ |
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87 0, /* tp_iter */ |
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88 0, /* tp_iternext */ |
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89 0, /* tp_methods */ |
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90 0, /* tp_members */ |
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91 listdir_stat_getsets, /* tp_getset */ |
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92 0, /* tp_base */ |
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93 0, /* tp_dict */ |
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94 0, /* tp_descr_get */ |
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95 0, /* tp_descr_set */ |
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96 0, /* tp_dictoffset */ |
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97 0, /* tp_init */ |
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98 0, /* tp_alloc */ |
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99 listdir_stat_new, /* tp_new */ |
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100 }; |
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101 |
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102 static inline int mode_to_kind(int mode) |
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103 { |
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104 if (S_ISREG(mode)) return S_IFREG; |
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105 if (S_ISDIR(mode)) return S_IFDIR; |
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106 if (S_ISLNK(mode)) return S_IFLNK; |
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107 if (S_ISBLK(mode)) return S_IFBLK; |
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108 if (S_ISCHR(mode)) return S_IFCHR; |
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109 if (S_ISFIFO(mode)) return S_IFIFO; |
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110 if (S_ISSOCK(mode)) return S_IFSOCK; |
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111 return mode; |
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112 } |
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113 |
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114 static PyObject *listdir(PyObject *self, PyObject *args, PyObject *kwargs) |
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115 { |
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116 DIR *dir = NULL; |
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117 struct dirent64 *ent; |
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118 PyObject *list = NULL; |
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119 PyObject *ctor_args = NULL; |
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120 int all_kinds = 1; |
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121 char *full_path; |
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122 int path_len; |
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123 int do_stat; |
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124 char *path; |
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125 int ret; |
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126 |
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127 { |
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128 static char *kwlist[] = { "path", "stat", NULL }; |
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129 PyObject *statobj = NULL; |
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130 |
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131 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|O:listdir", kwlist, |
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132 &path, &path_len, &statobj)) |
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133 goto bail; |
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134 |
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135 do_stat = statobj && PyObject_IsTrue(statobj); |
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136 } |
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137 |
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138 if ((dir = opendir(path)) == NULL) { |
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139 list = PyErr_SetFromErrnoWithFilename(PyExc_OSError, path); |
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140 goto bail; |
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141 } |
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142 |
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143 if ((list = PyList_New(0)) == NULL) |
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144 goto bail; |
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145 |
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146 full_path = alloca(path_len + PATH_MAX + 2); |
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147 memcpy(full_path, path, path_len); |
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148 full_path[path_len] = '/'; |
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149 |
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150 while ((ent = readdir64(dir))) { |
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151 PyObject *name = NULL; |
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152 PyObject *py_kind = NULL; |
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153 PyObject *val = NULL; |
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154 unsigned char d_type; |
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155 int kind = -1; |
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156 |
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157 if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) |
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158 continue; |
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159 |
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160 #ifdef DT_REG |
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161 if (do_stat) |
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162 d_type = 0; |
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163 else |
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164 d_type = ent->d_type; |
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165 #else |
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166 d_type = 0; |
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167 #endif |
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168 |
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169 switch (d_type) { |
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170 #ifdef DT_REG |
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171 case DT_REG: kind = S_IFREG; break; |
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172 case DT_DIR: kind = S_IFDIR; break; |
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173 case DT_LNK: kind = S_IFLNK; break; |
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174 case DT_BLK: kind = S_IFBLK; break; |
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175 case DT_CHR: kind = S_IFCHR; break; |
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176 case DT_FIFO: kind = S_IFIFO; break; |
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177 case DT_SOCK: kind = S_IFSOCK; break; |
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178 #endif |
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179 default: |
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180 if (all_kinds) |
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181 all_kinds = 0; |
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182 break; |
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183 } |
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184 |
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185 name = PyString_FromString(ent->d_name); |
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186 if (kind != -1) |
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187 py_kind = PyInt_FromLong(kind); |
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188 else { |
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189 py_kind = Py_None; |
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190 Py_INCREF(Py_None); |
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191 } |
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192 |
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193 val = PyTuple_New(do_stat ? 3 : 2); |
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194 |
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195 if (name == NULL || py_kind == NULL || val == NULL) { |
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196 Py_XDECREF(name); |
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197 Py_XDECREF(py_kind); |
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198 Py_XDECREF(val); |
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199 |
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200 goto bail; |
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201 } |
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202 |
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203 PyTuple_SET_ITEM(val, 0, name); |
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204 PyTuple_SET_ITEM(val, 1, py_kind); |
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205 if (do_stat) { |
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206 PyTuple_SET_ITEM(val, 2, Py_None); |
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207 Py_INCREF(Py_None); |
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208 } |
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209 |
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210 PyList_Append(list, val); |
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211 Py_DECREF(val); |
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212 } |
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213 |
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214 PyList_Sort(list); |
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215 |
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216 if (do_stat || !all_kinds) { |
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217 ssize_t size = PyList_Size(list); |
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218 ssize_t i; |
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219 #ifdef AT_SYMLINK_NOFOLLOW |
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220 int dfd = dirfd(dir); |
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221 #endif |
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222 |
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223 for (i = 0; i < size; i++) { |
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224 PyObject *elt = PyList_GetItem(list, i); |
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225 char *name = PyString_AsString(PyTuple_GET_ITEM(elt, 0)); |
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226 PyObject *py_st = NULL; |
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227 PyObject *py_kind = PyTuple_GET_ITEM(elt, 1); |
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228 int kind; |
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229 |
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230 kind = py_kind == Py_None ? -1 : PyInt_AsLong(py_kind); |
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231 |
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232 if (kind != -1 && !do_stat) |
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233 continue; |
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234 |
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235 strcpy(full_path + path_len + 1, name); |
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236 |
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237 if (do_stat) { |
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238 struct listdir_stat *st; |
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239 |
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240 if (ctor_args == NULL) { |
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241 ctor_args = PyTuple_New(0); |
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242 if (ctor_args == NULL) |
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243 goto bail; |
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244 } |
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245 |
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246 st = (struct listdir_stat *) |
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247 PyObject_CallObject((PyObject *) &listdir_stat_type, |
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248 ctor_args); |
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249 if (st == NULL) |
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250 goto bail; |
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251 #ifdef AT_SYMLINK_NOFOLLOW |
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252 ret = fstatat(dfd, name, &st->st, AT_SYMLINK_NOFOLLOW); |
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253 #else |
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254 ret = lstat(full_path, &st->st); |
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255 #endif |
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256 if (ret == -1) { |
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257 list = PyErr_SetFromErrnoWithFilename(PyExc_OSError, |
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258 full_path); |
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259 goto bail; |
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260 } |
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261 if (kind == -1) |
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262 kind = mode_to_kind(st->st.st_mode); |
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263 py_st = (PyObject *) st; |
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264 } else { |
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265 struct stat buf; |
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266 #ifdef AT_SYMLINK_NOFOLLOW |
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267 ret = fstatat(dfd, ent->d_name, &buf, AT_SYMLINK_NOFOLLOW); |
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268 #else |
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269 ret = lstat(full_path, &buf); |
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270 #endif |
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271 if (ret == -1) { |
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272 list = PyErr_SetFromErrnoWithFilename(PyExc_OSError, |
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273 full_path); |
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274 goto bail; |
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275 } |
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276 if (kind == -1) |
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277 kind = mode_to_kind(buf.st_mode); |
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278 } |
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279 |
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280 if (py_kind == Py_None && kind != -1) { |
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281 py_kind = PyInt_FromLong(kind); |
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282 if (py_kind == NULL) |
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283 goto bail; |
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284 Py_XDECREF(Py_None); |
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285 PyTuple_SET_ITEM(elt, 1, py_kind); |
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286 } |
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287 |
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288 if (do_stat) { |
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289 if (py_st == NULL) { |
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290 py_st = Py_None; |
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291 Py_INCREF(Py_None); |
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292 } |
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293 PyTuple_SET_ITEM(elt, 2, py_st); |
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294 } |
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295 } |
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296 } |
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297 |
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298 goto done; |
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299 |
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300 bail: |
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301 Py_XDECREF(list); |
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302 |
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303 done: |
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304 Py_XDECREF(ctor_args); |
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305 if (dir) |
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306 closedir(dir); |
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307 |
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308 return list; |
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309 } |
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310 |
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311 static char osutil_doc[] = "Native operating system services."; |
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312 |
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313 static PyMethodDef methods[] = { |
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314 {"listdir", (PyCFunction) listdir, METH_VARARGS | METH_KEYWORDS, |
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315 "list a directory\n"}, |
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316 {NULL, NULL} |
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317 }; |
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318 |
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319 PyMODINIT_FUNC initosutil(void) |
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320 { |
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321 if (PyType_Ready(&listdir_stat_type) == -1) |
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322 return; |
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323 |
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324 Py_InitModule3("osutil", methods, osutil_doc); |
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325 } |