Mercurial > hg
annotate mercurial/osutil.c @ 5423:e5f238a8b0d2
osutil: more cleanups
- eliminate a level of nesting
- untab targets of gotos
author | Matt Mackall <mpm@selenic.com> |
---|---|
date | Mon, 08 Oct 2007 18:47:14 -0500 |
parents | a3ba7ef98c94 |
children | 005638db9d0c |
rev | line source |
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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 #include <Python.h> |
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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 struct listdir_stat { |
5421 | 21 PyObject_HEAD |
22 struct stat st; | |
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23 }; |
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24 |
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25 #define listdir_slot(name) \ |
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26 static PyObject *listdir_stat_##name(PyObject *self, void *x) \ |
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27 { \ |
5421 | 28 return PyInt_FromLong(((struct listdir_stat *)self)->st.name); \ |
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29 } |
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30 |
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31 listdir_slot(st_dev); |
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32 listdir_slot(st_mode); |
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33 listdir_slot(st_nlink); |
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34 listdir_slot(st_size); |
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35 listdir_slot(st_mtime); |
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36 listdir_slot(st_ctime); |
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37 |
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38 static struct PyGetSetDef listdir_stat_getsets[] = { |
5421 | 39 {"st_dev", listdir_stat_st_dev, 0, 0, 0}, |
40 {"st_mode", listdir_stat_st_mode, 0, 0, 0}, | |
41 {"st_nlink", listdir_stat_st_nlink, 0, 0, 0}, | |
42 {"st_size", listdir_stat_st_size, 0, 0, 0}, | |
43 {"st_mtime", listdir_stat_st_mtime, 0, 0, 0}, | |
44 {"st_ctime", listdir_stat_st_ctime, 0, 0, 0}, | |
45 {0, 0, 0, 0, 0} | |
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46 }; |
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47 |
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48 static PyObject *listdir_stat_new(PyTypeObject *t, PyObject *a, PyObject *k) |
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49 { |
5421 | 50 return t->tp_alloc(t, 0); |
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51 } |
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52 |
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53 static void listdir_stat_dealloc(PyObject *o) |
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54 { |
5421 | 55 o->ob_type->tp_free(o); |
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56 } |
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57 |
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58 static PyTypeObject listdir_stat_type = { |
5421 | 59 PyObject_HEAD_INIT(NULL) |
60 0, /*ob_size*/ | |
61 "osutil.stat", /*tp_name*/ | |
62 sizeof(struct listdir_stat), /*tp_basicsize*/ | |
63 0, /*tp_itemsize*/ | |
64 (destructor)listdir_stat_dealloc, /*tp_dealloc*/ | |
65 0, /*tp_print*/ | |
66 0, /*tp_getattr*/ | |
67 0, /*tp_setattr*/ | |
68 0, /*tp_compare*/ | |
69 0, /*tp_repr*/ | |
70 0, /*tp_as_number*/ | |
71 0, /*tp_as_sequence*/ | |
72 0, /*tp_as_mapping*/ | |
73 0, /*tp_hash */ | |
74 0, /*tp_call*/ | |
75 0, /*tp_str*/ | |
76 0, /*tp_getattro*/ | |
77 0, /*tp_setattro*/ | |
78 0, /*tp_as_buffer*/ | |
79 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ | |
80 "stat objects", /* tp_doc */ | |
81 0, /* tp_traverse */ | |
82 0, /* tp_clear */ | |
83 0, /* tp_richcompare */ | |
84 0, /* tp_weaklistoffset */ | |
85 0, /* tp_iter */ | |
86 0, /* tp_iternext */ | |
87 0, /* tp_methods */ | |
88 0, /* tp_members */ | |
89 listdir_stat_getsets, /* tp_getset */ | |
90 0, /* tp_base */ | |
91 0, /* tp_dict */ | |
92 0, /* tp_descr_get */ | |
93 0, /* tp_descr_set */ | |
94 0, /* tp_dictoffset */ | |
95 0, /* tp_init */ | |
96 0, /* tp_alloc */ | |
97 listdir_stat_new, /* tp_new */ | |
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98 }; |
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99 |
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100 static inline int mode_to_kind(int mode) |
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101 { |
5421 | 102 if (S_ISREG(mode)) return S_IFREG; |
103 if (S_ISDIR(mode)) return S_IFDIR; | |
104 if (S_ISLNK(mode)) return S_IFLNK; | |
105 if (S_ISBLK(mode)) return S_IFBLK; | |
106 if (S_ISCHR(mode)) return S_IFCHR; | |
107 if (S_ISFIFO(mode)) return S_IFIFO; | |
108 if (S_ISSOCK(mode)) return S_IFSOCK; | |
109 return mode; | |
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110 } |
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111 |
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112 static PyObject *listdir(PyObject *self, PyObject *args, PyObject *kwargs) |
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113 { |
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114 static char *kwlist[] = { "path", "stat", NULL }; |
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115 PyObject *statobj = NULL; |
5421 | 116 DIR *dir = NULL; |
117 struct dirent *ent; | |
118 PyObject *list = NULL; | |
119 PyObject *ctor_args = NULL; | |
120 int all_kinds = 1; | |
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121 char full_path[PATH_MAX + 10]; |
5421 | 122 int path_len; |
123 int do_stat; | |
124 char *path; | |
125 int ret; | |
126 ssize_t size; | |
127 ssize_t i; | |
128 int dfd; | |
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129 |
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130 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|O:listdir", kwlist, |
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131 &path, &path_len, &statobj)) |
5421 | 132 goto bail; |
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133 |
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134 do_stat = statobj && PyObject_IsTrue(statobj); |
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135 |
5421 | 136 dir = opendir(path); |
137 if (!dir) { | |
138 list = PyErr_SetFromErrnoWithFilename(PyExc_OSError, path); | |
139 goto bail; | |
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140 } |
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141 |
5421 | 142 list = PyList_New(0); |
143 if (!list) | |
144 goto bail; | |
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145 |
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146 strncpy(full_path, path, PATH_MAX); |
5421 | 147 full_path[path_len] = '/'; |
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148 |
5421 | 149 for (ent = readdir(dir); ent; ent = readdir(dir)) { |
150 PyObject *name = NULL; | |
151 PyObject *py_kind = NULL; | |
152 PyObject *val = NULL; | |
153 unsigned char d_type; | |
154 int kind = -1; | |
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155 |
5421 | 156 if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) |
157 continue; | |
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158 |
5421 | 159 #ifdef DT_REG |
160 if (do_stat) | |
161 d_type = 0; | |
162 else | |
163 d_type = ent->d_type; | |
164 #else | |
165 d_type = 0; | |
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166 #endif |
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167 |
5421 | 168 switch (d_type) { |
169 #ifdef DT_REG | |
170 case DT_REG: kind = S_IFREG; break; | |
171 case DT_DIR: kind = S_IFDIR; break; | |
172 case DT_LNK: kind = S_IFLNK; break; | |
173 case DT_BLK: kind = S_IFBLK; break; | |
174 case DT_CHR: kind = S_IFCHR; break; | |
175 case DT_FIFO: kind = S_IFIFO; break; | |
176 case DT_SOCK: kind = S_IFSOCK; break; | |
177 #endif | |
178 default: | |
179 if (all_kinds) | |
180 all_kinds = 0; | |
181 break; | |
182 } | |
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183 |
5421 | 184 name = PyString_FromString(ent->d_name); |
185 if (kind != -1) | |
186 py_kind = PyInt_FromLong(kind); | |
187 else { | |
188 py_kind = Py_None; | |
189 Py_INCREF(Py_None); | |
190 } | |
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191 |
5421 | 192 val = PyTuple_New(do_stat ? 3 : 2); |
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193 |
5421 | 194 if (!name || !py_kind || !val) { |
195 Py_XDECREF(name); | |
196 Py_XDECREF(py_kind); | |
197 Py_XDECREF(val); | |
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198 goto bail; |
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199 } |
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200 |
5421 | 201 PyTuple_SET_ITEM(val, 0, name); |
202 PyTuple_SET_ITEM(val, 1, py_kind); | |
203 if (do_stat) { | |
204 PyTuple_SET_ITEM(val, 2, Py_None); | |
205 Py_INCREF(Py_None); | |
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206 } |
5421 | 207 |
208 PyList_Append(list, val); | |
209 Py_DECREF(val); | |
210 } | |
211 | |
212 PyList_Sort(list); | |
213 size = PyList_Size(list); | |
214 #ifdef AT_SYMLINK_NOFOLLOW | |
215 dfd = dirfd(dir); | |
216 #endif | |
217 | |
5423 | 218 if (!(do_stat || !all_kinds)) |
219 goto done; | |
5421 | 220 |
5423 | 221 for (i = 0; i < size; i++) { |
222 PyObject *elt = PyList_GetItem(list, i); | |
223 char *name = PyString_AsString(PyTuple_GET_ITEM(elt, 0)); | |
224 PyObject *py_st = NULL; | |
225 PyObject *py_kind = PyTuple_GET_ITEM(elt, 1); | |
226 int kind; | |
5421 | 227 |
5423 | 228 kind = py_kind == Py_None ? -1 : PyInt_AsLong(py_kind); |
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229 |
5423 | 230 if (kind != -1 && !do_stat) |
231 continue; | |
232 | |
233 strncat(full_path + path_len + 1, name, PATH_MAX - path_len); | |
234 full_path[PATH_MAX] = 0; | |
235 | |
236 if (do_stat) { | |
237 struct listdir_stat *st; | |
238 | |
239 if (!ctor_args) { | |
240 ctor_args = PyTuple_New(0); | |
241 if (!ctor_args) | |
5421 | 242 goto bail; |
243 } | |
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244 |
5423 | 245 st = (struct listdir_stat *) |
246 PyObject_CallObject((PyObject *)&listdir_stat_type, | |
247 ctor_args); | |
5421 | 248 |
5423 | 249 if (!st) |
250 goto bail; | |
251 #ifdef AT_SYMLINK_NOFOLLOW | |
252 ret = fstatat(dfd, name, &st->st, AT_SYMLINK_NOFOLLOW); | |
253 #else | |
254 ret = lstat(full_path, &st->st); | |
255 #endif | |
256 if (ret == -1) { | |
257 list = PyErr_SetFromErrnoWithFilename(PyExc_OSError, | |
258 full_path); | |
259 goto bail; | |
5421 | 260 } |
5423 | 261 if (kind == -1) |
262 kind = mode_to_kind(st->st.st_mode); | |
263 py_st = (PyObject *)st; | |
264 } else { | |
265 struct stat buf; | |
266 #ifdef AT_SYMLINK_NOFOLLOW | |
267 ret = fstatat(dfd, ent->d_name, &buf, AT_SYMLINK_NOFOLLOW); | |
268 #else | |
269 ret = lstat(full_path, &buf); | |
270 #endif | |
271 if (ret == -1) { | |
272 list = PyErr_SetFromErrnoWithFilename(PyExc_OSError, | |
273 full_path); | |
274 goto bail; | |
275 } | |
276 if (kind == -1) | |
277 kind = mode_to_kind(buf.st_mode); | |
278 } | |
279 | |
280 if (py_kind == Py_None && kind != -1) { | |
281 py_kind = PyInt_FromLong(kind); | |
282 if (!py_kind) | |
283 goto bail; | |
284 Py_XDECREF(Py_None); | |
285 PyTuple_SET_ITEM(elt, 1, py_kind); | |
286 } | |
287 | |
288 if (do_stat) { | |
289 if (!py_st) { | |
290 py_st = Py_None; | |
291 Py_INCREF(Py_None); | |
292 } | |
293 PyTuple_SET_ITEM(elt, 2, py_st); | |
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294 } |
5421 | 295 } |
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296 |
5421 | 297 goto done; |
298 | |
5423 | 299 bail: |
300 Py_XDECREF(list); | |
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301 |
5423 | 302 done: |
303 Py_XDECREF(ctor_args); | |
304 if (dir) | |
305 closedir(dir); | |
5421 | 306 return list; |
307 } | |
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308 |
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309 |
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310 static char osutil_doc[] = "Native operating system services."; |
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311 |
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312 static PyMethodDef methods[] = { |
5421 | 313 {"listdir", (PyCFunction)listdir, METH_VARARGS | METH_KEYWORDS, |
314 "list a directory\n"}, | |
315 {NULL, NULL} | |
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316 }; |
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317 |
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318 PyMODINIT_FUNC initosutil(void) |
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319 { |
5421 | 320 if (PyType_Ready(&listdir_stat_type) == -1) |
321 return; | |
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322 |
5421 | 323 Py_InitModule3("osutil", methods, osutil_doc); |
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324 } |