Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1 | /* POSIX module implementation */ |
| 2 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 3 | #include <signal.h> |
| 4 | #include <string.h> |
| 5 | #include <setjmp.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/stat.h> |
| 8 | #include <sys/time.h> |
| 9 | #ifdef SYSV |
| 10 | #include <dirent.h> |
| 11 | #define direct dirent |
| 12 | #else |
| 13 | #include <sys/dir.h> |
| 14 | #endif |
| 15 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 16 | #include "allobjects.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 17 | #include "modsupport.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 18 | |
Guido van Rossum | 7f77e2d | 1990-10-30 13:34:38 +0000 | [diff] [blame] | 19 | extern char *strerror PROTO((int)); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 20 | |
| 21 | #ifdef AMOEBA |
| 22 | #define NO_LSTAT |
| 23 | #endif |
| 24 | |
| 25 | |
| 26 | /* Return a dictionary corresponding to the POSIX environment table */ |
| 27 | |
| 28 | extern char **environ; |
| 29 | |
| 30 | static object * |
| 31 | convertenviron() |
| 32 | { |
| 33 | object *d; |
| 34 | char **e; |
| 35 | d = newdictobject(); |
| 36 | if (d == NULL) |
| 37 | return NULL; |
| 38 | if (environ == NULL) |
| 39 | return d; |
| 40 | /* XXX This part ignores errors */ |
| 41 | for (e = environ; *e != NULL; e++) { |
| 42 | object *v; |
| 43 | char *p = strchr(*e, '='); |
| 44 | if (p == NULL) |
| 45 | continue; |
| 46 | v = newstringobject(p+1); |
| 47 | if (v == NULL) |
| 48 | continue; |
| 49 | *p = '\0'; |
| 50 | (void) dictinsert(d, *e, v); |
| 51 | *p = '='; |
| 52 | DECREF(v); |
| 53 | } |
| 54 | return d; |
| 55 | } |
| 56 | |
| 57 | |
| 58 | static object *PosixError; /* Exception posix.error */ |
| 59 | |
| 60 | /* Set a POSIX-specific error from errno, and return NULL */ |
| 61 | |
Guido van Rossum | 9a1581c | 1990-10-21 13:12:47 +0000 | [diff] [blame] | 62 | static object * |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 63 | posix_error() |
| 64 | { |
Guido van Rossum | e8f305a | 1990-10-14 20:04:28 +0000 | [diff] [blame] | 65 | return err_errno(PosixError); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 66 | } |
| 67 | |
| 68 | |
| 69 | /* POSIX generic methods */ |
| 70 | |
| 71 | static object * |
| 72 | posix_1str(args, func) |
| 73 | object *args; |
| 74 | int (*func) FPROTO((const char *)); |
| 75 | { |
| 76 | object *path1; |
| 77 | if (!getstrarg(args, &path1)) |
| 78 | return NULL; |
| 79 | if ((*func)(getstringvalue(path1)) < 0) |
| 80 | return posix_error(); |
| 81 | INCREF(None); |
| 82 | return None; |
| 83 | } |
| 84 | |
| 85 | static object * |
| 86 | posix_2str(args, func) |
| 87 | object *args; |
| 88 | int (*func) FPROTO((const char *, const char *)); |
| 89 | { |
| 90 | object *path1, *path2; |
| 91 | if (!getstrstrarg(args, &path1, &path2)) |
| 92 | return NULL; |
| 93 | if ((*func)(getstringvalue(path1), getstringvalue(path2)) < 0) |
| 94 | return posix_error(); |
| 95 | INCREF(None); |
| 96 | return None; |
| 97 | } |
| 98 | |
| 99 | static object * |
| 100 | posix_strint(args, func) |
| 101 | object *args; |
| 102 | int (*func) FPROTO((const char *, int)); |
| 103 | { |
| 104 | object *path1; |
| 105 | int i; |
| 106 | if (!getstrintarg(args, &path1, &i)) |
| 107 | return NULL; |
| 108 | if ((*func)(getstringvalue(path1), i) < 0) |
| 109 | return posix_error(); |
| 110 | INCREF(None); |
| 111 | return None; |
| 112 | } |
| 113 | |
| 114 | static object * |
| 115 | posix_do_stat(self, args, statfunc) |
| 116 | object *self; |
| 117 | object *args; |
| 118 | int (*statfunc) FPROTO((const char *, struct stat *)); |
| 119 | { |
| 120 | struct stat st; |
| 121 | object *path; |
| 122 | object *v; |
| 123 | if (!getstrarg(args, &path)) |
| 124 | return NULL; |
| 125 | if ((*statfunc)(getstringvalue(path), &st) != 0) |
| 126 | return posix_error(); |
| 127 | v = newtupleobject(10); |
| 128 | if (v == NULL) |
| 129 | return NULL; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 130 | #define SET(i, st_member) settupleitem(v, i, newintobject((long)st.st_member)) |
| 131 | SET(0, st_mode); |
| 132 | SET(1, st_ino); |
| 133 | SET(2, st_dev); |
| 134 | SET(3, st_nlink); |
| 135 | SET(4, st_uid); |
| 136 | SET(5, st_gid); |
| 137 | SET(6, st_size); |
| 138 | SET(7, st_atime); |
| 139 | SET(8, st_mtime); |
| 140 | SET(9, st_ctime); |
| 141 | #undef SET |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 142 | if (err_occurred()) { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 143 | DECREF(v); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 144 | return NULL; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 145 | } |
| 146 | return v; |
| 147 | } |
| 148 | |
| 149 | |
| 150 | /* POSIX methods */ |
| 151 | |
| 152 | static object * |
| 153 | posix_chdir(self, args) |
| 154 | object *self; |
| 155 | object *args; |
| 156 | { |
| 157 | extern int chdir PROTO((const char *)); |
| 158 | return posix_1str(args, chdir); |
| 159 | } |
| 160 | |
| 161 | static object * |
| 162 | posix_chmod(self, args) |
| 163 | object *self; |
| 164 | object *args; |
| 165 | { |
| 166 | extern int chmod PROTO((const char *, mode_t)); |
| 167 | return posix_strint(args, chmod); |
| 168 | } |
| 169 | |
| 170 | static object * |
| 171 | posix_getcwd(self, args) |
| 172 | object *self; |
| 173 | object *args; |
| 174 | { |
| 175 | char buf[1026]; |
| 176 | extern char *getcwd PROTO((char *, int)); |
| 177 | if (!getnoarg(args)) |
| 178 | return NULL; |
| 179 | if (getcwd(buf, sizeof buf) == NULL) |
| 180 | return posix_error(); |
| 181 | return newstringobject(buf); |
| 182 | } |
| 183 | |
| 184 | static object * |
| 185 | posix_link(self, args) |
| 186 | object *self; |
| 187 | object *args; |
| 188 | { |
| 189 | extern int link PROTO((const char *, const char *)); |
| 190 | return posix_2str(args, link); |
| 191 | } |
| 192 | |
| 193 | static object * |
| 194 | posix_listdir(self, args) |
| 195 | object *self; |
| 196 | object *args; |
| 197 | { |
| 198 | object *name, *d, *v; |
| 199 | DIR *dirp; |
| 200 | struct direct *ep; |
| 201 | if (!getstrarg(args, &name)) |
| 202 | return NULL; |
| 203 | if ((dirp = opendir(getstringvalue(name))) == NULL) |
| 204 | return posix_error(); |
| 205 | if ((d = newlistobject(0)) == NULL) { |
| 206 | closedir(dirp); |
| 207 | return NULL; |
| 208 | } |
| 209 | while ((ep = readdir(dirp)) != NULL) { |
| 210 | v = newstringobject(ep->d_name); |
| 211 | if (v == NULL) { |
| 212 | DECREF(d); |
| 213 | d = NULL; |
| 214 | break; |
| 215 | } |
| 216 | if (addlistitem(d, v) != 0) { |
| 217 | DECREF(v); |
| 218 | DECREF(d); |
| 219 | d = NULL; |
| 220 | break; |
| 221 | } |
| 222 | DECREF(v); |
| 223 | } |
| 224 | closedir(dirp); |
| 225 | return d; |
| 226 | } |
| 227 | |
| 228 | static object * |
| 229 | posix_mkdir(self, args) |
| 230 | object *self; |
| 231 | object *args; |
| 232 | { |
| 233 | extern int mkdir PROTO((const char *, mode_t)); |
| 234 | return posix_strint(args, mkdir); |
| 235 | } |
| 236 | |
| 237 | static object * |
| 238 | posix_rename(self, args) |
| 239 | object *self; |
| 240 | object *args; |
| 241 | { |
| 242 | extern int rename PROTO((const char *, const char *)); |
| 243 | return posix_2str(args, rename); |
| 244 | } |
| 245 | |
| 246 | static object * |
| 247 | posix_rmdir(self, args) |
| 248 | object *self; |
| 249 | object *args; |
| 250 | { |
| 251 | extern int rmdir PROTO((const char *)); |
| 252 | return posix_1str(args, rmdir); |
| 253 | } |
| 254 | |
| 255 | static object * |
| 256 | posix_stat(self, args) |
| 257 | object *self; |
| 258 | object *args; |
| 259 | { |
| 260 | extern int stat PROTO((const char *, struct stat *)); |
| 261 | return posix_do_stat(self, args, stat); |
| 262 | } |
| 263 | |
| 264 | static object * |
| 265 | posix_system(self, args) |
| 266 | object *self; |
| 267 | object *args; |
| 268 | { |
| 269 | object *command; |
| 270 | int sts; |
| 271 | if (!getstrarg(args, &command)) |
| 272 | return NULL; |
| 273 | sts = system(getstringvalue(command)); |
| 274 | return newintobject((long)sts); |
| 275 | } |
| 276 | |
| 277 | static object * |
| 278 | posix_umask(self, args) |
| 279 | object *self; |
| 280 | object *args; |
| 281 | { |
| 282 | int i; |
| 283 | if (!getintarg(args, &i)) |
| 284 | return NULL; |
| 285 | i = umask(i); |
| 286 | if (i < 0) |
| 287 | return posix_error(); |
| 288 | return newintobject((long)i); |
| 289 | } |
| 290 | |
| 291 | static object * |
| 292 | posix_unlink(self, args) |
| 293 | object *self; |
| 294 | object *args; |
| 295 | { |
| 296 | extern int unlink PROTO((const char *)); |
| 297 | return posix_1str(args, unlink); |
| 298 | } |
| 299 | |
| 300 | static object * |
| 301 | posix_utimes(self, args) |
| 302 | object *self; |
| 303 | object *args; |
| 304 | { |
| 305 | object *path; |
| 306 | struct timeval tv[2]; |
| 307 | if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2) { |
| 308 | err_badarg(); |
| 309 | return NULL; |
| 310 | } |
| 311 | if (!getstrarg(gettupleitem(args, 0), &path) || |
| 312 | !getlonglongargs(gettupleitem(args, 1), |
| 313 | &tv[0].tv_sec, &tv[1].tv_sec)) |
| 314 | return NULL; |
| 315 | tv[0].tv_usec = tv[1].tv_usec = 0; |
| 316 | if (utimes(getstringvalue(path), tv) < 0) |
| 317 | return posix_error(); |
| 318 | INCREF(None); |
| 319 | return None; |
| 320 | } |
| 321 | |
| 322 | #ifdef NO_GETCWD |
| 323 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame^] | 324 | #include "errno.h" |
| 325 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 326 | /* Quick hack to get posix.getcwd() working for pure BSD 4.3 */ |
| 327 | /* XXX This assumes MAXPATHLEN = 1024 !!! */ |
| 328 | |
| 329 | static char * |
| 330 | getcwd(buf, size) |
| 331 | char *buf; |
| 332 | int size; |
| 333 | { |
| 334 | extern char *getwd PROTO((char *)); |
| 335 | register char *ret = getwd(buf); |
| 336 | if (ret == NULL) |
| 337 | errno = EACCES; /* Most likely error */ |
| 338 | return ret; |
| 339 | } |
| 340 | |
| 341 | #endif /* NO_GETCWD */ |
| 342 | |
| 343 | |
| 344 | #ifndef NO_LSTAT |
| 345 | |
| 346 | static object * |
| 347 | posix_lstat(self, args) |
| 348 | object *self; |
| 349 | object *args; |
| 350 | { |
| 351 | extern int lstat PROTO((const char *, struct stat *)); |
| 352 | return posix_do_stat(self, args, lstat); |
| 353 | } |
| 354 | |
| 355 | static object * |
| 356 | posix_readlink(self, args) |
| 357 | object *self; |
| 358 | object *args; |
| 359 | { |
| 360 | char buf[1024]; /* XXX Should use MAXPATHLEN */ |
| 361 | object *path; |
| 362 | int n; |
| 363 | if (!getstrarg(args, &path)) |
| 364 | return NULL; |
| 365 | n = readlink(getstringvalue(path), buf, sizeof buf); |
| 366 | if (n < 0) |
| 367 | return posix_error(); |
| 368 | return newsizedstringobject(buf, n); |
| 369 | } |
| 370 | |
| 371 | static object * |
| 372 | posix_symlink(self, args) |
| 373 | object *self; |
| 374 | object *args; |
| 375 | { |
| 376 | extern int symlink PROTO((const char *, const char *)); |
| 377 | return posix_2str(args, symlink); |
| 378 | } |
| 379 | |
| 380 | #endif /* NO_LSTAT */ |
| 381 | |
| 382 | |
| 383 | static struct methodlist posix_methods[] = { |
| 384 | {"chdir", posix_chdir}, |
| 385 | {"chmod", posix_chmod}, |
| 386 | {"getcwd", posix_getcwd}, |
| 387 | {"link", posix_link}, |
| 388 | {"listdir", posix_listdir}, |
| 389 | {"mkdir", posix_mkdir}, |
| 390 | {"rename", posix_rename}, |
| 391 | {"rmdir", posix_rmdir}, |
| 392 | {"stat", posix_stat}, |
| 393 | {"system", posix_system}, |
| 394 | {"umask", posix_umask}, |
| 395 | {"unlink", posix_unlink}, |
| 396 | {"utimes", posix_utimes}, |
| 397 | #ifndef NO_LSTAT |
| 398 | {"lstat", posix_lstat}, |
| 399 | {"readlink", posix_readlink}, |
| 400 | {"symlink", posix_symlink}, |
| 401 | #endif |
| 402 | {NULL, NULL} /* Sentinel */ |
| 403 | }; |
| 404 | |
| 405 | |
| 406 | void |
| 407 | initposix() |
| 408 | { |
| 409 | object *m, *d, *v; |
| 410 | |
| 411 | m = initmodule("posix", posix_methods); |
| 412 | d = getmoduledict(m); |
| 413 | |
| 414 | /* Initialize posix.environ dictionary */ |
| 415 | v = convertenviron(); |
| 416 | if (v == NULL || dictinsert(d, "environ", v) != 0) |
| 417 | fatal("can't define posix.environ"); |
| 418 | DECREF(v); |
| 419 | |
| 420 | /* Initialize posix.error exception */ |
| 421 | PosixError = newstringobject("posix.error"); |
| 422 | if (PosixError == NULL || dictinsert(d, "error", PosixError) != 0) |
| 423 | fatal("can't define posix.error"); |
| 424 | } |