source: trunk/src/kmk/kmkbuiltin/mscfakes.c@ 1750

Last change on this file since 1750 was 1717, checked in by bird, 17 years ago

mscfakes: CreateSymbolicLinkA returns BOOLEAN not BOOL.
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 14.2 KB
Line 
1/* $Id: mscfakes.c 1717 2008-09-03 13:21:01Z bird $ */
2/** @file
3 *
4 * Fake Unix stuff for MSC.
5 *
6 * Copyright (c) 2005-2007 knut st. osmundsen <bird-kBuild-spam@anduin.net>
7 *
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with This program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25
26#include <stdarg.h>
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
30#include <errno.h>
31#include <io.h>
32#include <fcntl.h>
33#include <sys/stat.h>
34#include "err.h"
35#include "mscfakes.h"
36
37#define timeval windows_timeval
38#include <Windows.h>
39#undef timeval
40
41
42/**
43 * Makes corrections to a directory path that ends with a trailing slash.
44 *
45 * @returns temporary buffer to free.
46 * @param ppszPath The path pointer. This is updated when necessary.
47 * @param pfMustBeDir This is set if it must be a directory, otherwise it's cleared.
48 */
49static char *
50msc_fix_path(const char **ppszPath, int *pfMustBeDir)
51{
52 const char *pszPath = *ppszPath;
53 const char *psz;
54 char *pszNew;
55 *pfMustBeDir = 0;
56
57 /*
58 * Skip any compusory trailing slashes
59 */
60 if (pszPath[0] == '/' || pszPath[0] == '\\')
61 {
62 if ( (pszPath[1] == '/' || pszPath[1] == '\\')
63 && pszPath[2] != '/'
64 && pszPath[2] != '\\')
65 /* unc */
66 pszPath += 2;
67 else
68 /* root slash(es) */
69 pszPath++;
70 }
71 else if ( isalpha(pszPath[0])
72 && pszPath[1] == ':')
73 {
74 if (pszPath[2] == '/' || pszPath[2] == '\\')
75 /* drive w/ slash */
76 pszPath += 3;
77 else
78 /* drive relative path. */
79 pszPath += 2;
80 }
81 /* else: relative path, no skipping necessary. */
82
83 /*
84 * Any trailing slashes to drop off?
85 */
86 psz = strchr(pszPath, '\0');
87 if (pszPath <= psz)
88 return NULL;
89 if ( psz[-1] != '/'
90 || psz[-1] != '\\')
91 return NULL;
92
93 /* figure how many, make a copy and strip them off. */
94 while ( psz > pszPath
95 && ( psz[-1] == '/'
96 || psz[-1] == '\\'))
97 psz--;
98 pszNew = strdup(pszPath);
99 pszNew[psz - pszPath] = '\0';
100
101 *pfMustBeDir = 1;
102 *ppszPath = pszNew; /* use this one */
103 return pszNew;
104}
105
106
107static int
108msc_set_errno(DWORD dwErr)
109{
110 switch (dwErr)
111 {
112 default:
113 case ERROR_INVALID_FUNCTION: errno = EINVAL; break;
114 case ERROR_FILE_NOT_FOUND: errno = ENOENT; break;
115 case ERROR_PATH_NOT_FOUND: errno = ENOENT; break;
116 case ERROR_TOO_MANY_OPEN_FILES: errno = EMFILE; break;
117 case ERROR_ACCESS_DENIED: errno = EACCES; break;
118 case ERROR_INVALID_HANDLE: errno = EBADF; break;
119 case ERROR_ARENA_TRASHED: errno = ENOMEM; break;
120 case ERROR_NOT_ENOUGH_MEMORY: errno = ENOMEM; break;
121 case ERROR_INVALID_BLOCK: errno = ENOMEM; break;
122 case ERROR_BAD_ENVIRONMENT: errno = E2BIG; break;
123 case ERROR_BAD_FORMAT: errno = ENOEXEC; break;
124 case ERROR_INVALID_ACCESS: errno = EINVAL; break;
125 case ERROR_INVALID_DATA: errno = EINVAL; break;
126 case ERROR_INVALID_DRIVE: errno = ENOENT; break;
127 case ERROR_CURRENT_DIRECTORY: errno = EACCES; break;
128 case ERROR_NOT_SAME_DEVICE: errno = EXDEV; break;
129 case ERROR_NO_MORE_FILES: errno = ENOENT; break;
130 case ERROR_LOCK_VIOLATION: errno = EACCES; break;
131 case ERROR_BAD_NETPATH: errno = ENOENT; break;
132 case ERROR_NETWORK_ACCESS_DENIED: errno = EACCES; break;
133 case ERROR_BAD_NET_NAME: errno = ENOENT; break;
134 case ERROR_FILE_EXISTS: errno = EEXIST; break;
135 case ERROR_CANNOT_MAKE: errno = EACCES; break;
136 case ERROR_FAIL_I24: errno = EACCES; break;
137 case ERROR_INVALID_PARAMETER: errno = EINVAL; break;
138 case ERROR_NO_PROC_SLOTS: errno = EAGAIN; break;
139 case ERROR_DRIVE_LOCKED: errno = EACCES; break;
140 case ERROR_BROKEN_PIPE: errno = EPIPE; break;
141 case ERROR_DISK_FULL: errno = ENOSPC; break;
142 case ERROR_INVALID_TARGET_HANDLE: errno = EBADF; break;
143 case ERROR_WAIT_NO_CHILDREN: errno = ECHILD; break;
144 case ERROR_CHILD_NOT_COMPLETE: errno = ECHILD; break;
145 case ERROR_DIRECT_ACCESS_HANDLE: errno = EBADF; break;
146 case ERROR_NEGATIVE_SEEK: errno = EINVAL; break;
147 case ERROR_SEEK_ON_DEVICE: errno = EACCES; break;
148 case ERROR_DIR_NOT_EMPTY: errno = ENOTEMPTY; break;
149 case ERROR_NOT_LOCKED: errno = EACCES; break;
150 case ERROR_BAD_PATHNAME: errno = ENOENT; break;
151 case ERROR_MAX_THRDS_REACHED: errno = EAGAIN; break;
152 case ERROR_LOCK_FAILED: errno = EACCES; break;
153 case ERROR_ALREADY_EXISTS: errno = EEXIST; break;
154 case ERROR_FILENAME_EXCED_RANGE: errno = ENOENT; break;
155 case ERROR_NESTING_NOT_ALLOWED: errno = EAGAIN; break;
156 }
157
158 return -1;
159}
160
161char *dirname(char *path)
162{
163 /** @todo later */
164 return path;
165}
166
167
168int lchmod(const char *pszPath, mode_t mode)
169{
170 int rc = 0;
171 int fMustBeDir;
172 char *pszPathFree = msc_fix_path(&pszPath, &fMustBeDir);
173
174 /*
175 * Get the current attributes
176 */
177 DWORD fAttr = GetFileAttributes(pszPath);
178 if (fAttr == INVALID_FILE_ATTRIBUTES)
179 rc = msc_set_errno(GetLastError());
180 else if (fMustBeDir & !(fAttr & FILE_ATTRIBUTE_DIRECTORY))
181 {
182 errno = ENOTDIR;
183 rc = -1;
184 }
185 else
186 {
187 /*
188 * Modify the attributes and try set them.
189 */
190 if (mode & _S_IWRITE)
191 fAttr &= ~FILE_ATTRIBUTE_READONLY;
192 else
193 fAttr |= FILE_ATTRIBUTE_READONLY;
194 if (!SetFileAttributes(pszPath, fAttr))
195 rc = msc_set_errno(GetLastError());
196 }
197
198 if (pszPathFree)
199 {
200 int saved_errno = errno;
201 free(pszPathFree);
202 errno = saved_errno;
203 }
204 return rc;
205}
206
207
208int msc_chmod(const char *pszPath, mode_t mode)
209{
210 int rc = 0;
211 int saved_errno;
212 int fMustBeDir;
213 char *pszPathFree = msc_fix_path(&pszPath, &fMustBeDir);
214
215 /*
216 * Get the current attributes.
217 */
218 DWORD fAttr = GetFileAttributes(pszPath);
219 if (fAttr == INVALID_FILE_ATTRIBUTES)
220 rc = msc_set_errno(GetLastError());
221 else if (fMustBeDir & !(fAttr & FILE_ATTRIBUTE_DIRECTORY))
222 {
223 errno = ENOTDIR;
224 rc = -1;
225 }
226 else if (fAttr & FILE_ATTRIBUTE_REPARSE_POINT)
227 {
228 errno = ENOSYS; /** @todo resolve symbolic link / rewrite to NtSetInformationFile. */
229 rc = -1;
230 }
231 else
232 {
233 /*
234 * Modify the attributes and try set them.
235 */
236 if (mode & _S_IWRITE)
237 fAttr &= ~FILE_ATTRIBUTE_READONLY;
238 else
239 fAttr |= FILE_ATTRIBUTE_READONLY;
240 if (!SetFileAttributes(pszPath, fAttr))
241 rc = msc_set_errno(GetLastError());
242 }
243
244 if (pszPathFree)
245 {
246 int saved_errno = errno;
247 free(pszPathFree);
248 errno = saved_errno;
249 }
250 return rc;
251}
252
253
254int link(const char *pszDst, const char *pszLink)
255{
256 errno = ENOSYS;
257 err(1, "link() is not implemented on windows!");
258 return -1;
259}
260
261
262int mkdir_msc(const char *path, mode_t mode)
263{
264 int rc = (mkdir)(path);
265 if (rc)
266 {
267 size_t len = strlen(path);
268 if (len > 0 && (path[len - 1] == '/' || path[len - 1] == '\\'))
269 {
270 char *str = strdup(path);
271 while (len > 0 && (str[len - 1] == '/' || str[len - 1] == '\\'))
272 str[--len] = '\0';
273 rc = (mkdir)(str);
274 free(str);
275 }
276 }
277 return rc;
278}
279
280int rmdir_msc(const char *path)
281{
282 int rc = (rmdir)(path);
283 if (rc)
284 {
285 size_t len = strlen(path);
286 if (len > 0 && (path[len - 1] == '/' || path[len - 1] == '\\'))
287 {
288 char *str = strdup(path);
289 while (len > 0 && (str[len - 1] == '/' || str[len - 1] == '\\'))
290 str[--len] = '\0';
291 rc = (rmdir)(str);
292 free(str);
293 }
294 }
295 return rc;
296}
297
298
299static int doname(char *pszX, char *pszEnd)
300{
301 static char s_szChars[] = "Xabcdefghijklmnopqrstuwvxyz1234567890";
302 int rc = 0;
303 do
304 {
305 char ch;
306
307 pszEnd++;
308 ch = *(strchr(s_szChars, *pszEnd) + 1);
309 if (ch)
310 {
311 *pszEnd = ch;
312 return 0;
313 }
314 *pszEnd = 'a';
315 } while (pszEnd != pszX);
316 return 1;
317}
318
319
320int mkstemp(char *temp)
321{
322 char *pszX = strchr(temp, 'X');
323 char *pszEnd = strchr(pszX, '\0');
324 int cTries = 1000;
325 while (--cTries > 0)
326 {
327 int fd;
328 if (doname(pszX, pszEnd))
329 return -1;
330 fd = open(temp, _O_EXCL | _O_CREAT | _O_BINARY | _O_RDWR, 0777);
331 if (fd >= 0)
332 return fd;
333 }
334 return -1;
335}
336
337
338/** Unix to DOS. */
339static char *fix_slashes(char *psz)
340{
341 char *pszRet = psz;
342 for (; *psz; psz++)
343 if (*psz == '/')
344 *psz = '\\';
345 return pszRet;
346}
347
348
349/** Calcs the SYMBOLIC_LINK_FLAG_DIRECTORY flag for CreatesymbolcLink. */
350static DWORD is_directory(const char *pszPath, const char *pszRelativeTo)
351{
352 size_t cchPath = strlen(pszPath);
353 struct stat st;
354 if (cchPath > 0 && pszPath[cchPath - 1] == '\\' || pszPath[cchPath - 1] == '/')
355 return 1; /* SYMBOLIC_LINK_FLAG_DIRECTORY */
356
357 if (stat(pszPath, &st))
358 {
359 size_t cchRelativeTo = strlen(pszRelativeTo);
360 char *psz = malloc(cchPath + cchRelativeTo + 4);
361 memcpy(psz, pszRelativeTo, cchRelativeTo);
362 memcpy(psz + cchRelativeTo, "\\", 1);
363 memcpy(psz + cchRelativeTo + 1, pszPath, cchPath + 1);
364 if (stat(pszPath, &st))
365 st.st_mode = _S_IFREG;
366 free(psz);
367 }
368
369 return (st.st_mode & _S_IFMT) == _S_IFDIR ? 1 : 0;
370}
371
372
373int symlink(const char *pszDst, const char *pszLink)
374{
375 static BOOLEAN (WINAPI *s_pfnCreateSymbolicLinkA)(LPCSTR, LPCSTR, DWORD) = 0;
376 static BOOL s_fTried = FALSE;
377
378 if (!s_fTried)
379 {
380 HMODULE hmod = LoadLibrary("KERNEL32.DLL");
381 if (hmod)
382 *(FARPROC *)&s_pfnCreateSymbolicLinkA = GetProcAddress(hmod, "CreateSymbolicLinkA");
383 s_fTried = TRUE;
384 }
385
386 if (s_pfnCreateSymbolicLinkA)
387 {
388 char *pszDstCopy = fix_slashes(strdup(pszDst));
389 char *pszLinkCopy = fix_slashes(strdup(pszLink));
390 BOOLEAN fRc = s_pfnCreateSymbolicLinkA(pszLinkCopy, pszDstCopy,
391 is_directory(pszDstCopy, pszLinkCopy));
392 DWORD err = GetLastError();
393 free(pszDstCopy);
394 free(pszLinkCopy);
395 if (fRc)
396 return 0;
397 switch (err)
398 {
399 case ERROR_NOT_SUPPORTED: errno = ENOSYS; break;
400 case ERROR_ALREADY_EXISTS:
401 case ERROR_FILE_EXISTS: errno = EEXIST; break;
402 case ERROR_DIRECTORY: errno = ENOTDIR; break;
403 case ERROR_ACCESS_DENIED:
404 case ERROR_PRIVILEGE_NOT_HELD: errno = EPERM; break;
405 default: errno = EINVAL; break;
406 }
407 return -1;
408 }
409
410 errno = ENOSYS;
411 err(1, "symlink() is not implemented on windows!");
412 return -1;
413}
414
415
416#if _MSC_VER < 1400
417int snprintf(char *buf, size_t size, const char *fmt, ...)
418{
419 int cch;
420 va_list args;
421 va_start(args, fmt);
422 cch = vsprintf(buf, fmt, args);
423 va_end(args);
424 return cch;
425}
426#endif
427
428
429int utimes(const char *pszPath, const struct timeval *paTimes)
430{
431 /** @todo implement me! */
432 return 0;
433}
434
435
436int writev(int fd, const struct iovec *vector, int count)
437{
438 int size = 0;
439 int i;
440 for (i = 0; i < count; i++)
441 {
442 int cb = (int)write(fd, vector[i].iov_base, (int)vector[i].iov_len);
443 if (cb < 0)
444 return -1;
445 size += cb;
446 }
447 return size;
448}
449
450
451intmax_t strtoimax(const char *nptr, char **endptr, int base)
452{
453 return strtol(nptr, endptr, base); /** @todo fix this. */
454}
455
456
457uintmax_t strtoumax(const char *nptr, char **endptr, int base)
458{
459 return strtoul(nptr, endptr, base); /** @todo fix this. */
460}
461
462
463int asprintf(char **strp, const char *fmt, ...)
464{
465 int rc;
466 va_list va;
467 va_start(va, fmt);
468 rc = vasprintf(strp, fmt, va);
469 va_end(va);
470 return rc;
471}
472
473
474int vasprintf(char **strp, const char *fmt, va_list va)
475{
476 int rc;
477 char *psz;
478 size_t cb = 1024;
479
480 *strp = NULL;
481 for (;;)
482 {
483 va_list va2;
484
485 psz = malloc(cb);
486 if (!psz)
487 return -1;
488
489#ifdef va_copy
490 va_copy(va2, va);
491 rc = snprintf(psz, cb, fmt, va2);
492 va_end(vaCopy);
493#else
494 va2 = va;
495 rc = snprintf(psz, cb, fmt, va2);
496#endif
497 if (rc < 0 || (size_t)rc < cb)
498 break;
499 cb *= 2;
500 free(psz);
501 }
502
503 *strp = psz;
504 return rc;
505}
506
507
508#undef stat
509/*
510 * Workaround for directory names with trailing slashes.
511 * Added by bird reasons stated.
512 */
513int
514my_other_stat(const char *path, struct stat *st)
515{
516 int rc = stat(path, st);
517 if ( rc != 0
518 && errno == ENOENT
519 && *path != '\0')
520 {
521 char *slash = strchr(path, '\0') - 1;
522 if (*slash == '/' || *slash == '\\')
523 {
524 size_t len_path = slash - path + 1;
525 char *tmp = alloca(len_path + 4);
526 memcpy(tmp, path, len_path);
527 tmp[len_path] = '.';
528 tmp[len_path + 1] = '\0';
529 errno = 0;
530 rc = stat(tmp, st);
531 if ( rc == 0
532 && !S_ISDIR(st->st_mode))
533 {
534 errno = ENOTDIR;
535 rc = -1;
536 }
537 }
538 }
539 return rc;
540}
541
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