shfile.c@ 2289

Last change on this file since 2289 was 2289, checked in by bird, 16 years ago
kash: implementing shfile on top of the win32 api instead of msvcrt.
Property svn:eol-style set to `LF` Property svn:keywords set to `Id`
File size: 28.4 KB

Line
1	/* $Id: shfile.c 2289 2009-02-26 04:58:49Z bird $ */
2	/** @file
3	*
4	* File management.
5	*
6	* Copyright (c) 2007-2009 knut st. osmundsen <[email protected]>
7	*
8	*
9	* This file is part of kBuild.
10	*
11	* kBuild is free software; you can redistribute it and/or modify
12	* it under the terms of the GNU General Public License as published by
13	* the Free Software Foundation; either version 2 of the License, or
14	* (at your option) any later version.
15	*
16	* kBuild is distributed in the hope that it will be useful,
17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19	* GNU General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with kBuild; if not, write to the Free Software
23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24	*
25	*/
26
27	#include "shfile.h"
28	#include "shinstance.h" /* TRACE2 */
29	#include <stdlib.h>
30	#include <stdio.h>
31	#include <assert.h>
32
33	#if K_OS == K_OS_WINDOWS
34	# include <limits.h>
35	# ifndef PIPE_BUF
36	# define PIPE_BUF 512
37	# endif
38	# include <Windows.h>
39	#else
40	# include <unistd.h>
41	# include <fcntl.h>
42	# include <dirent.h>
43	#endif
44
45	#ifdef DEBUG
46	extern FILE *tracefile;
47	#endif
48
49
50	/*******************************************************************************
51	* Defined Constants And Macros *
52	*******************************************************************************/
53	/** @def SHFILE_IN_USE
54	* Whether the file descriptor table stuff is actually in use or not.
55	*/
56	#if !defined(SH_PURE_STUB_MODE) \
57	&& ( K_OS == K_OS_WINDOWS \
58	\|\| ( !defined(SH_STUB_MODE) \
59	&& !defined(SH_FORKED_MODE)) \
60	)
61	# define SHFILE_IN_USE
62	#endif
63	/** The max file table size. */
64	#define SHFILE_MAX 1024
65	/** The file table growth rate. */
66	#define SHFILE_GROW 64
67	/** The min native unix file descriptor. */
68	#define SHFILE_UNIX_MIN_FD 32
69	/** The path buffer size we use. */
70	#define SHFILE_MAX_PATH 4096
71
72	/** Set errno and return. Doing a trace in debug build. */
73	#define RETURN_ERROR(rc, err, msg) \
74	do { \
75	TRACE2((NULL, "%s: " ## msg ## " - returning %d / %d\n", __FUNCTION__, (rc), (err))); \
76	errno = (err); \
77	return (rc); \
78	} while (0)
79
80
81	#ifdef SHFILE_IN_USE
82
83	/**
84	* Close the specified native handle.
85	*
86	* @param native The native file handle.
87	* @param flags The flags in case they might come in handy later.
88	*/
89	static void shfile_native_close(intptr_t native, unsigned flags)
90	{
91	#if K_OS == K_OS_WINDOWS
92	BOOL fRc = CloseHandle((HANDLE)native);
93	assert(fRc); (void)fRc;
94	#else
95	int s = errno;
96	close(native);
97	errno = s;
98	#endif
99	(void)flags;
100	}
101
102	/**
103	* Inserts the file into the descriptor table.
104	*
105	* If we're out of memory and cannot extend the table, we'll close the
106	* file, set errno to EMFILE and return -1.
107	*
108	* @returns The file descriptor number. -1 and errno on failure.
109	* @param pfdtab The file descriptor table.
110	* @param native The native file handle.
111	* @param flags The flags the it was created with.
112	* @param fdMin The minimum file descriptor number, pass -1 if any is ok.
113	* @param who Who we're doing this for (for logging purposes).
114	*/
115	static int shfile_insert(shfdtab pfdtab, intptr_t native, unsigned flags, int fdMin, const char who)
116	{
117	shmtxtmp tmp;
118	int fd;
119	int i;
120
121	/*
122	* Fend of bad stuff.
123	*/
124	if (fdMin >= SHFILE_MAX)
125	{
126	errno = EMFILE;
127	return -1;
128	}
129
130	shmtx_enter(&pfdtab->mtx, &tmp);
131
132	/*
133	* Search for a fitting unused location.
134	*/
135	fd = -1;
136	for (i = 0; (unsigned)i < pfdtab->size; i++)
137	if ( i >= fdMin
138	&& pfdtab->tab[i].fd == -1)
139	{
140	fd = i;
141	break;
142	}
143	if (fd == -1)
144	{
145	/*
146	* Grow the descriptor table.
147	*/
148	shfile *new_tab;
149	int new_size = pfdtab->size + SHFILE_GROW;
150	while (new_size < fdMin)
151	new_size += SHFILE_GROW;
152	new_tab = realloc(pfdtab->tab, new_size * sizeof(shfile));
153	if (new_tab)
154	{
155	fd = i = pfdtab->size;
156	if (fd < fdMin)
157	fd = fdMin;
158	for (i = pfdtab->size; i < new_size; i++)
159	{
160	new_tab[i].fd = -1;
161	new_tab[i].flags = 0;
162	new_tab[i].native = -1;
163	}
164
165	pfdtab->tab = new_tab;
166	pfdtab->size = new_size;
167	}
168	}
169
170	/*
171	* Fill in the entry if we've found one.
172	*/
173	if (fd != -1)
174	{
175	pfdtab->tab[fd].fd = fd;
176	pfdtab->tab[fd].flags = flags;
177	pfdtab->tab[fd].cloexec = 0;
178	pfdtab->tab[fd].native = native;
179	}
180	else
181	shfile_native_close(native, flags);
182
183	shmtx_leave(&pfdtab->mtx, &tmp);
184
185	if (fd == -1)
186	errno = EMFILE;
187	(void)who;
188	return fd;
189	}
190
191	/**
192	* Gets a file descriptor and lock the file descriptor table.
193	*
194	* @returns Pointer to the file and table ownership on success,
195	* NULL and errno set to EBADF on failure.
196	* @param pfdtab The file descriptor table.
197	* @param fd The file descriptor number.
198	* @param ptmp See shmtx_enter.
199	*/
200	static shfile shfile_get(shfdtab pfdtab, int fd, shmtxtmp *ptmp)
201	{
202	shfile *file = NULL;
203	if ( fd >= 0
204	&& (unsigned)fd < pfdtab->size)
205	{
206	shmtx_enter(&pfdtab->mtx, ptmp);
207	if ((unsigned)fd < pfdtab->size
208	&& pfdtab->tab[fd].fd != -1)
209	file = &pfdtab->tab[fd];
210	else
211	shmtx_leave(&pfdtab->mtx, ptmp);
212	}
213	if (!file)
214	errno = EBADF;
215	return file;
216	}
217
218	/**
219	* Puts back a file descriptor and releases the table ownership.
220	*
221	* @param pfdtab The file descriptor table.
222	* @param file The file.
223	* @param ptmp See shmtx_leave.
224	*/
225	static void shfile_put(shfdtab pfdtab, shfile file, shmtxtmp *ptmp)
226	{
227	shmtx_leave(&pfdtab->mtx, ptmp);
228	assert(file);
229	(void)file;
230	}
231
232
233	/**
234	* Constructs a path from the current directory and the passed in path.
235	*
236	* @returns 0 on success, -1 and errno set to ENAMETOOLONG or EINVAL on failure.
237	*
238	* @param pfdtab The file descriptor table
239	* @param path The path the caller supplied.
240	* @param buf Where to put the path. This is assumed to be SHFILE_MAX_PATH
241	* chars in size.
242	*/
243	int shfile_make_path(shfdtab pfdtab, const char path, char *buf)
244	{
245	size_t path_len = strlen(path);
246	if (path_len == 0)
247	{
248	errno = EINVAL;
249	return -1;
250	}
251	if (path_len >= SHFILE_MAX_PATH)
252	{
253	errno = ENAMETOOLONG;
254	return -1;
255	}
256	if ( *path == '/'
257	#if K_OS == K_OS_WINDOWS \|\| K_OS == K_OS_OS2
258	\|\| *path == '\\'
259	\|\| ( !*path
260	&& path[1] == ':'
261	&& ( (path >= 'A' && path <= 'Z')
262	\|\| (path >= 'a' && path <= 'z')))
263	#endif
264	)
265	{
266	memcpy(buf, path, path_len + 1);
267	}
268	else
269	{
270	size_t cwd_len;
271	shmtxtmp tmp;
272
273	shmtx_enter(&pfdtab->mtx, &tmp);
274
275	cwd_len = strlen(pfdtab->cwd);
276	memcpy(buf, pfdtab->cwd, cwd_len);
277
278	shmtx_leave(&pfdtab->mtx, &tmp);
279
280	if (cwd_len + path_len + 1 >= SHFILE_MAX_PATH)
281	{
282	errno = ENAMETOOLONG;
283	return -1;
284	}
285	if ( !cwd_len
286	\|\| buf[cwd_len - 1] != '/')
287	buf[cwd_len++] = '/';
288	memcpy(buf + cwd_len, path, path_len + 1);
289	}
290
291	#if K_OS == K_OS_WINDOWS \|\| K_OS == K_OS_OS2
292	if (!strcmp(buf, "/dev/null"))
293	strcpy(buf, "NUL");
294	#endif
295	return 0;
296	}
297
298	# if K_OS == K_OS_WINDOWS
299	/**
300	* Converts a DOS(/Windows) error code to errno,
301	* assigning it to errno.
302	*
303	* @returns -1
304	* @param err The DOS error.
305	*/
306	static int shfile_dos2errno(int err)
307	{
308	switch (err)
309	{
310	case ERROR_BAD_ENVIRONMENT: errno = E2BIG; break;
311	case ERROR_ACCESS_DENIED: errno = EACCES; break;
312	case ERROR_CURRENT_DIRECTORY: errno = EACCES; break;
313	case ERROR_LOCK_VIOLATION: errno = EACCES; break;
314	case ERROR_NETWORK_ACCESS_DENIED: errno = EACCES; break;
315	case ERROR_CANNOT_MAKE: errno = EACCES; break;
316	case ERROR_FAIL_I24: errno = EACCES; break;
317	case ERROR_DRIVE_LOCKED: errno = EACCES; break;
318	case ERROR_SEEK_ON_DEVICE: errno = EACCES; break;
319	case ERROR_NOT_LOCKED: errno = EACCES; break;
320	case ERROR_LOCK_FAILED: errno = EACCES; break;
321	case ERROR_NO_PROC_SLOTS: errno = EAGAIN; break;
322	case ERROR_MAX_THRDS_REACHED: errno = EAGAIN; break;
323	case ERROR_NESTING_NOT_ALLOWED: errno = EAGAIN; break;
324	case ERROR_INVALID_HANDLE: errno = EBADF; break;
325	case ERROR_INVALID_TARGET_HANDLE: errno = EBADF; break;
326	case ERROR_DIRECT_ACCESS_HANDLE: errno = EBADF; break;
327	case ERROR_WAIT_NO_CHILDREN: errno = ECHILD; break;
328	case ERROR_CHILD_NOT_COMPLETE: errno = ECHILD; break;
329	case ERROR_FILE_EXISTS: errno = EEXIST; break;
330	case ERROR_ALREADY_EXISTS: errno = EEXIST; break;
331	case ERROR_INVALID_FUNCTION: errno = EINVAL; break;
332	case ERROR_INVALID_ACCESS: errno = EINVAL; break;
333	case ERROR_INVALID_DATA: errno = EINVAL; break;
334	case ERROR_INVALID_PARAMETER: errno = EINVAL; break;
335	case ERROR_NEGATIVE_SEEK: errno = EINVAL; break;
336	case ERROR_TOO_MANY_OPEN_FILES: errno = EMFILE; break;
337	case ERROR_FILE_NOT_FOUND: errno = ENOENT; break;
338	case ERROR_PATH_NOT_FOUND: errno = ENOENT; break;
339	case ERROR_INVALID_DRIVE: errno = ENOENT; break;
340	case ERROR_NO_MORE_FILES: errno = ENOENT; break;
341	case ERROR_BAD_NETPATH: errno = ENOENT; break;
342	case ERROR_BAD_NET_NAME: errno = ENOENT; break;
343	case ERROR_BAD_PATHNAME: errno = ENOENT; break;
344	case ERROR_FILENAME_EXCED_RANGE: errno = ENOENT; break;
345	case ERROR_BAD_FORMAT: errno = ENOEXEC; break;
346	case ERROR_ARENA_TRASHED: errno = ENOMEM; break;
347	case ERROR_NOT_ENOUGH_MEMORY: errno = ENOMEM; break;
348	case ERROR_INVALID_BLOCK: errno = ENOMEM; break;
349	case ERROR_NOT_ENOUGH_QUOTA: errno = ENOMEM; break;
350	case ERROR_DISK_FULL: errno = ENOSPC; break;
351	case ERROR_DIR_NOT_EMPTY: errno = ENOTEMPTY; break;
352	case ERROR_BROKEN_PIPE: errno = EPIPE; break;
353	case ERROR_NOT_SAME_DEVICE: errno = EXDEV; break;
354	default: errno = EINVAL; break;
355	}
356	return -1;
357	}
358	# endif /* K_OS == K_OS_WINDOWS */
359
360	#endif /* SHFILE_IN_USE */
361
362	/**
363	* Initializes a file descriptor table.
364	*
365	* @returns 0 on success, -1 and errno on failure.
366	* @param pfdtab The table to initialize.
367	* @param inherit File descriptor table to inherit from. If not specified
368	* we will inherit from the current process as it were.
369	*/
370	int shfile_init(shfdtab pfdtab, shfdtab inherit)
371	{
372	int rc;
373
374	pfdtab->cwd = NULL;
375	pfdtab->size = 0;
376	pfdtab->tab = NULL;
377	rc = shmtx_init(&pfdtab->mtx);
378	if (!rc)
379	{
380	#ifdef SHFILE_IN_USE
381	char buf[SHFILE_MAX_PATH];
382	if (getcwd(buf, sizeof(buf)))
383	{
384	pfdtab->cwd = strdup(buf);
385	if (!inherit)
386	{
387	# if K_OS == K_OS_WINDOWS
388	static const struct
389	{
390	DWORD dwStdHandle;
391	unsigned flags;
392	} aStdHandles[3] =
393	{
394	{ STD_INPUT_HANDLE, _O_RDONLY },
395	{ STD_OUTPUT_HANDLE, _O_WRONLY },
396	{ STD_ERROR_HANDLE, _O_WRONLY }
397	};
398	unsigned i;
399	STARTUPINFO Info;
400
401	rc = 0;
402
403	/* Try pick up the Visual C++ CRT file descriptor info. */
404	__try {
405	GetStartupInfo(&Info);
406	} __except (EXCEPTION_EXECUTE_HANDLER) {
407	memset(&Info, 0, sizeof(Info));
408	}
409	if ( Info.cbReserved2 <= sizeof(int)
410	&& (uintptr_t)Info.lpReserved2 >= 0x1000
411	&& (int )Info.lpReserved2 * (sizeof(int) + sizeof(intptr_t)) + 4 <= Info.cbReserved2
412	&& (int )Info.lpReserved2 <= 2048
413	&& (int )Info.lpReserved2 >= 1)
414	{
415	unsigned c = (int )Info.lpReserved2;
416	char aosfile = (char )Info.lpReserved2 + sizeof(int);
417	intptr_t aosfhnd = (intptr_t )(aosfile + c);
418
419	/** @todo process */
420
421	}
422
423	/* Check the three standard handles. */
424	for (i = 0; i < 3; i++)
425	{
426	HANDLE hFile = GetStdHandle(aStdHandles[i].dwStdHandle);
427	if ( hFile != INVALID_HANDLE_VALUE
428	&& ( (unsigned)i >= pfdtab->size
429	\|\| pfdtab->tab[i].fd == -1))
430	{
431	int fd2 = shfile_insert(pfdtab, (intptr_t)hFile, aStdHandles[i].flags, i, "shtab_init");
432	assert(fd2 == i); (void)fd2;
433	if (fd2 != i)
434	rc = -1;
435	}
436	}
437	# else
438	# endif
439	}
440	else
441	{
442	/** @todo */
443	errno = ENOSYS;
444	rc = -1;
445	}
446	}
447	else
448	rc = -1;
449	#endif
450	}
451	return rc;
452	}
453
454	/**
455	* open().
456	*/
457	int shfile_open(shfdtab pfdtab, const char name, unsigned flags, mode_t mode)
458	{
459	int fd;
460	#ifdef SHFILE_IN_USE
461	char absname[SHFILE_MAX_PATH];
462	# if K_OS == K_OS_WINDOWS
463	HANDLE hFile;
464	DWORD dwDesiredAccess;
465	DWORD dwShareMode;
466	DWORD dwCreationDisposition;
467	DWORD dwFlagsAndAttributes;
468	SECURITY_ATTRIBUTES SecurityAttributes;
469
470	# ifndef _O_ACCMODE
471	# define _O_ACCMODE (_O_RDONLY\|_O_WRONLY\|_O_RDWR)
472	# endif
473	switch (flags & (_O_ACCMODE \| _O_APPEND))
474	{
475	case _O_RDONLY: dwDesiredAccess = GENERIC_READ; break;
476	case _O_RDONLY \| _O_APPEND: dwDesiredAccess = GENERIC_READ; break;
477	case _O_WRONLY: dwDesiredAccess = GENERIC_WRITE; break;
478	case _O_WRONLY \| _O_APPEND: dwDesiredAccess = (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA); break;
479	case _O_RDWR: dwDesiredAccess = GENERIC_READ \| GENERIC_WRITE; break;
480	case _O_RDWR \| _O_APPEND: dwDesiredAccess = GENERIC_READ \| (FILE_GENERIC_WRITE & ~FILE_WRITE_DATA); break;
481
482	default:
483	RETURN_ERROR(-1, EINVAL, "invalid mode");
484	}
485
486	dwShareMode = FILE_SHARE_DELETE \| FILE_SHARE_READ \| FILE_SHARE_WRITE;
487
488	SecurityAttributes.nLength = sizeof(SecurityAttributes);
489	SecurityAttributes.lpSecurityDescriptor = NULL;
490	SecurityAttributes.bInheritHandle = (flags & _O_NOINHERIT) == 0;
491
492	if (flags & _O_CREAT)
493	{
494	if ((flags & (_O_EXCL \| _O_TRUNC)) == (_O_EXCL \| _O_TRUNC))
495	RETURN_ERROR(-1, EINVAL, "_O_EXCL \| _O_TRUNC");
496
497	if (flags & _O_TRUNC)
498	dwCreationDisposition = CREATE_ALWAYS; /* not 100%, but close enough */
499	else if (flags & _O_EXCL)
500	dwCreationDisposition = CREATE_NEW;
501	else
502	dwCreationDisposition = OPEN_ALWAYS;
503	}
504	else if (flags & _O_TRUNC)
505	dwCreationDisposition = TRUNCATE_EXISTING;
506	else
507	dwCreationDisposition = OPEN_EXISTING;
508
509	if (!(flags & _O_CREAT) \|\| (mode & 0222))
510	dwFlagsAndAttributes = FILE_ATTRIBUTE_NORMAL;
511	else
512	dwFlagsAndAttributes = FILE_ATTRIBUTE_READONLY;
513
514	fd = shfile_make_path(pfdtab, name, &absname[0]);
515	if (!fd)
516	{
517	SetLastError(0);
518	hFile = CreateFileA(absname,
519	dwDesiredAccess,
520	dwShareMode,
521	&SecurityAttributes,
522	dwCreationDisposition,
523	dwFlagsAndAttributes,
524	NULL /* hTemplateFile */);
525	if (hFile != INVALID_HANDLE_VALUE)
526	fd = shfile_insert(pfdtab, (intptr_t)hFile, flags, -1, "shfile_open");
527	else
528	fd = shfile_dos2errno(GetLastError());
529	}
530
531	# else /* K_OS != K_OS_WINDOWS */
532	fd = shfile_make_path(pfdtab, name, &absname[0]);
533	if (!fd)
534	{
535	fd = open(absname, flag, mode);
536	if (fd != -1)
537	{
538	int native = fcntl(fd, F_DUPFD, SHFILE_UNIX_MIN_FD);
539	int s = errno;
540	close(fd);
541	errno = s;
542	if (native != -1)
543	fd = shfile_insert(pfdtab, native, flags, -1, "shfile_open");
544	else
545	fd = -1;
546	}
547	}
548
549	# endif /* K_OS != K_OS_WINDOWS */
550
551	#elif defined(SH_PURE_STUB_MODE)
552	fd = -1;
553	errno = ENOSYS;
554
555	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
556	fd = open(name, flags, mode);
557	#endif
558
559	#ifdef DEBUG
560	if (tracefile)
561	TRACE2((NULL, "shfile_open(%p:{%s}, %#x, 0%o) -> %d [%d]\n", name, name, flags, mode, fd, errno));
562	#endif
563	return fd;
564	}
565
566	int shfile_pipe(shfdtab *pfdtab, int fds[2])
567	{
568	#ifdef SH_PURE_STUB_MODE
569	return -1;
570
571	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
572	# ifdef _MSC_VER
573	return _pipe(fds, PIPE_BUF, O_BINARY);
574	# else
575	return pipe(fds);
576	# endif
577
578	#else
579	#endif
580	}
581
582	int shfile_dup(shfdtab *pfdtab, int fd)
583	{
584	int rc;
585	#ifdef SH_PURE_STUB_MODE
586	rc = -1;
587
588	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
589	rc = dup(fd);
590
591	#else
592	#endif
593
594	TRACE2((NULL, "shfile_dup(%d) -> %d [%d]\n", fd, rc, errno));
595	return rc;
596	}
597
598	/**
599	* close().
600	*/
601	int shfile_close(shfdtab *pfdtab, unsigned fd)
602	{
603	int rc;
604	#ifdef SHFILE_IN_USE
605	shmtxtmp tmp;
606	shfile *file = shfile_get(pfdtab, fd, &tmp);
607	if (file)
608	{
609	shfile_native_close(file->native, file->flags);
610
611	file->fd = -1;
612	file->flags = 0;
613	file->native = -1;
614
615	shfile_put(pfdtab, file, &tmp);
616	rc = 0;
617	}
618	else
619	rc = -1;
620
621	#elif defined(SH_PURE_STUB_MODE)
622	rc = -1;
623
624	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
625	rc = close(fd);
626	#endif
627
628	TRACE2((NULL, "shfile_close(%d) -> %d [%d]\n", fd, rc, errno));
629	return rc;
630	}
631
632	/**
633	* read().
634	*/
635	long shfile_read(shfdtab pfdtab, int fd, void buf, size_t len)
636	{
637	long rc;
638	#ifdef SHFILE_IN_USE
639	shmtxtmp tmp;
640	shfile *file = shfile_get(pfdtab, fd, &tmp);
641	if (file)
642	{
643	# if K_OS == K_OS_WINDOWS
644	DWORD dwRead = 0;
645	if (ReadFile((HANDLE)file->native, buf, (DWORD)len, &dwRead, NULL))
646	rc = dwRead;
647	else
648	rc = shfile_dos2errno(GetLastError());
649	# else
650	rc = read(file->native, buf, len);
651	# endif
652
653	shfile_put(pfdtab, file, &tmp);
654	}
655	else
656	rc = -1;
657
658	#elif defined(SH_PURE_STUB_MODE)
659	rc = -1;
660
661	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
662	# ifdef _MSC_VER
663	rc = read(fd, buf, (unsigned)len);
664	# else
665	rc = read(fd, buf, len);
666	# endif
667	#endif
668	return rc;
669	}
670
671	/**
672	* write().
673	*/
674	long shfile_write(shfdtab pfdtab, int fd, const void buf, size_t len)
675	{
676	long rc;
677	#ifdef SHFILE_IN_USE
678	shmtxtmp tmp;
679	shfile *file = shfile_get(pfdtab, fd, &tmp);
680	if (file)
681	{
682	# if K_OS == K_OS_WINDOWS
683	DWORD dwWritten = 0;
684	if (WriteFile((HANDLE)file->native, buf, (DWORD)len, &dwWritten, NULL))
685	rc = dwWritten;
686	else
687	rc = shfile_dos2errno(GetLastError());
688	# else
689	rc = write(file->native, buf, len);
690	# endif
691
692	shfile_put(pfdtab, file, &tmp);
693	}
694	else
695	rc = -1;
696
697	#elif defined(SH_PURE_STUB_MODE)
698	rc = -1;
699
700	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
701	# ifdef _MSC_VER
702	rc = write(fd, buf, (unsigned)len);
703	# else
704	rc = write(fd, buf, len);
705	# endif
706	#endif
707	return rc;
708	}
709
710	/**
711	* lseek().
712	*/
713	long shfile_lseek(shfdtab *pfdtab, int fd, long off, int whench)
714	{
715	long rc;
716	#ifdef SHFILE_IN_USE
717	shmtxtmp tmp;
718	shfile *file = shfile_get(pfdtab, fd, &tmp);
719	if (file)
720	{
721	# if K_OS == K_OS_WINDOWS
722	assert(SEEK_SET == FILE_BEGIN);
723	assert(SEEK_CUR == FILE_CURRENT);
724	assert(SEEK_END == FILE_END);
725	rc = SetFilePointer((HANDLE)file->native, off, NULL, whench);
726	if (rc == INVALID_SET_FILE_POINTER)
727	rc = shfile_dos2errno(GetLastError());
728	# else
729	rc = lseek(file->native, off, whench);
730	# endif
731
732	shfile_put(pfdtab, file, &tmp);
733	}
734	else
735	rc = -1;
736
737	#elif defined(SH_PURE_STUB_MODE)
738	rc = -1;
739
740	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
741	rc = lseek(fd, off, whench);
742	#endif
743
744	return rc;
745	}
746
747	int shfile_fcntl(shfdtab *pfdtab, int fd, int cmd, int arg)
748	{
749	int rc;
750	#ifdef SHFILE_IN_USE
751	shmtxtmp tmp;
752	shfile *file = shfile_get(pfdtab, fd, &tmp);
753	if (file)
754	{
755	switch (cmd)
756	{
757	case F_GETFL:
758	rc = file->flags;
759	break;
760
761	case F_SETFL:
762	{
763	unsigned mask = O_NONBLOCK \| O_APPEND \| O_BINARY \| O_TEXT;
764	# ifdef O_DIRECT
765	mask \|= O_DIRECT;
766	# endif
767	# ifdef O_ASYNC
768	mask \|= O_ASYNC;
769	# endif
770	# ifdef O_SYNC
771	mask \|= O_SYNC;
772	# endif
773	if ((file->flags & mask) == (arg & mask))
774	rc = 0;
775	else
776	{
777	# if K_OS == K_OS_WINDOWS
778	assert(0);
779	errno = EINVAL;
780	rc = -1;
781	# else
782	rc = fcntl(file->native, F_SETFL, arg);
783	if (rc != -1)
784	file->flags = (file->flags & ~mask) \| (arg & mask);
785	# endif
786	}
787	break;
788	}
789
790	case F_DUPFD:
791	{
792	# if K_OS == K_OS_WINDOWS
793	HANDLE hNew = INVALID_HANDLE_VALUE;
794	if (DuplicateHandle(GetCurrentProcess(),
795	(HANDLE)file->native,
796	GetCurrentProcess(),
797	&hNew,
798	0,
799	TRUE /* bInheritHandle */,
800	DUPLICATE_SAME_ACCESS))
801	rc = shfile_insert(pfdtab, (intptr_t)hNew, file->flags, arg, "shfile_fcntl");
802	else
803	rc = shfile_dos2errno(GetLastError());
804	# else
805	int nativeNew = fcntl(file->native F_DUPFD, SHFILE_UNIX_MIN_FD);
806	if (nativeNew != -1)
807	rc = shfile_insert(pfdtab, nativeNew, file->flags, arg, "shfile_fcntl");
808	# endif
809	break;
810	}
811
812	default:
813	errno = -EINVAL;
814	rc = -1;
815	break;
816	}
817
818	shfile_put(pfdtab, file, &tmp);
819	}
820	else
821	rc = -1;
822
823	#elif defined(SH_PURE_STUB_MODE)
824	rc = -1;
825
826	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
827	# ifdef _MSC_VER
828	switch (cmd)
829	{
830	/* Just enough F_GETFL/F_SETFL to get along with. */
831	case F_GETFL:
832	errno = 0;
833	rc = _isatty(fd);
834	if (errno == EBADF)
835	rc = -1;
836	break;
837
838	case F_SETFL:
839	errno = 0;
840	rc = _isatty(fd);
841	if (errno != EBADF)
842	{
843	if (!arg)
844	rc = 0;
845	else
846	{
847	errno = EINVAL;
848	rc = -1;
849	}
850	}
851	else
852	rc = -1;
853	break;
854
855	case F_DUPFD:
856	{
857	/* the brute force approach. */
858	int i = 0;
859	int fds[256];
860	for (i = 0; i < 256; i++)
861	{
862	fds[i] = -1;
863	rc = _dup(fd);
864	if (rc >= arg)
865	break;
866	fds[i] = rc;
867	}
868	while (i-- > 0)
869	close(fds[i]);
870	if (rc < arg)
871	{
872	errno = EMFILE;
873	rc = -1;
874	}
875	break;
876	}
877	}
878	# else
879	rc = fcntl(fd, cmd, arg);
880	# endif
881	#endif
882
883	#ifdef DEBUG
884	if (tracefile)
885	switch (cmd)
886	{
887	case F_GETFL:
888	TRACE2((NULL, "shfile_fcntl(%d,F_GETFL,ignored=%d) -> %d [%d]\n", fd, arg, rc, errno));
889	break;
890	case F_SETFL:
891	TRACE2((NULL, "shfile_fcntl(%d,F_SETFL,newflags=%#x) -> %d [%d]\n", fd, arg, rc, errno));
892	break;
893	case F_DUPFD:
894	TRACE2((NULL, "shfile_fcntl(%d,F_DUPFS,minfd=%d) -> %d [%d]\n", fd, arg, rc, errno));
895	break;
896	default:
897	TRACE2((NULL, "shfile_fcntl(%d,%d,%d) -> %d [%d]\n", fd, cmd, arg, rc, errno));
898	break;
899	}
900	#endif
901	return rc;
902	}
903
904	int shfile_stat(shfdtab pfdtab, const char path, struct stat *pst)
905	{
906	#ifdef SH_PURE_STUB_MODE
907	return -1;
908
909	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
910	return stat(path, pst);
911
912	#else
913	#endif
914	}
915
916	int shfile_lstat(shfdtab pfdtab, const char link, struct stat *pst)
917	{
918	#ifdef SH_PURE_STUB_MODE
919	return -1;
920
921	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
922	# ifdef _MSC_VER
923	return stat(link, pst);
924	# else
925	return lstat(link, pst);
926	# endif
927
928	#else
929	#endif
930	}
931
932	int shfile_chdir(shfdtab pfdtab, const char path)
933	{
934	#ifdef SH_PURE_STUB_MODE
935	return -1;
936
937	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
938	# ifdef _MSC_VER //???
939	return chdir(path);
940	# else
941	return chdir(path);
942	# endif
943
944	#else
945	#endif
946	}
947
948	char shfile_getcwd(shfdtab pfdtab, char *buf, int len)
949	{
950	#ifdef SH_PURE_STUB_MODE
951	return NULL;
952
953	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
954	return getcwd(buf, len);
955
956	#else
957	#endif
958	}
959
960	int shfile_access(shfdtab pfdtab, const char path, int type)
961	{
962	#ifdef SH_PURE_STUB_MODE
963	return -1;
964
965	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
966	# ifdef _MSC_VER
967	type &= ~X_OK;
968	return access(path, type);
969	# else
970	return access(path, type);
971	# endif
972
973	#else
974	#endif
975	}
976
977	int shfile_isatty(shfdtab *pfdtab, int fd)
978	{
979	int rc;
980
981	#ifdef SH_PURE_STUB_MODE
982	rc = 0;
983	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
984	rc = isatty(fd);
985	#else
986	#endif
987
988	TRACE2((NULL, "isatty(%d) -> %d [%d]\n", fd, rc, errno));
989	return rc;
990	}
991
992
993	int shfile_cloexec(shfdtab *pfdtab, int fd, int closeit)
994	{
995	int rc;
996
997	#ifdef SH_PURE_STUB_MODE
998	rc = -1;
999
1000	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
1001	# ifdef _MSC_VER
1002	errno = ENOSYS;
1003	rc = -1;
1004	# else
1005	rc = fcntl(fd, F_SETFD, fcntl(fd, F_GETFD, 0)
1006	\| (closeit ? FD_CLOEXEC : 0));
1007	# endif
1008
1009	#else
1010	#endif
1011
1012	TRACE2((NULL, "shfile_cloexec(%d, %d) -> %d [%d]\n", fd, closeit, rc, errno));
1013	return rc;
1014	}
1015
1016
1017	int shfile_ioctl(shfdtab pfdtab, int fd, unsigned long request, void buf)
1018	{
1019	int rc;
1020
1021	#ifdef SH_PURE_STUB_MODE
1022	rc = -1;
1023
1024	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
1025	# ifdef _MSC_VER
1026	errno = ENOSYS;
1027	rc = -1;
1028	# else
1029	rc = ioctl(fd, request, buf);
1030	# endif
1031
1032	#else
1033	#endif
1034
1035	TRACE2((NULL, "ioctl(%d, %#x, %p) -> %d\n", fd, request, buf, rc));
1036	return rc;
1037	}
1038
1039
1040	mode_t shfile_get_umask(shfdtab *pfdtab)
1041	{
1042	#ifdef SH_PURE_STUB_MODE
1043	return 022;
1044
1045	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
1046	return 022;
1047
1048	#else
1049	#endif
1050	}
1051
1052
1053	shdir shfile_opendir(shfdtab pfdtab, const char *dir)
1054	{
1055	#ifdef SH_PURE_STUB_MODE
1056	return NULL;
1057
1058	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
1059	# ifdef _MSC_VER
1060	errno = ENOSYS;
1061	return NULL;
1062	# else
1063	return (shdir *)opendir(dir);
1064	# endif
1065
1066	#else
1067	#endif
1068	}
1069
1070	shdirent shfile_readdir(struct shdir pdir)
1071	{
1072	#ifdef SH_PURE_STUB_MODE
1073	return NULL;
1074
1075	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
1076	# ifdef _MSC_VER
1077	errno = ENOSYS;
1078	return NULL;
1079	# else
1080	struct dirent pde = readdir((DIR )pdir);
1081	return pde ? (shdirent *)&pde->d_name[0] : NULL;
1082	# endif
1083
1084	#else
1085	#endif
1086	}
1087
1088	void shfile_closedir(struct shdir *pdir)
1089	{
1090	#ifdef SH_PURE_STUB_MODE
1091	return NULL;
1092
1093	#elif defined(SH_STUB_MODE) \|\| defined(SH_FORKED_MODE)
1094	# ifdef _MSC_VER
1095	errno = ENOSYS;
1096	# else
1097	closedir((DIR *)pdir);
1098	# endif
1099
1100	#else
1101	#endif
1102	}

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source: kBuild/trunk/src/kash/shfile.c@ 2289

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