1: /* Like <fcntl.h>, but with non-working flags defined to 0.
2:
3: Copyright (C) 2006-2019 Free Software Foundation, Inc.
4:
5: This program is free software: you can redistribute it and/or modify
6: it under the terms of the GNU General Public License as published by
7: the Free Software Foundation; either version 3 of the License, or
8: (at your option) any later version.
9:
10: This program is distributed in the hope that it will be useful,
11: but WITHOUT ANY WARRANTY; without even the implied warranty of
12: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13: GNU General Public License for more details.
14:
15: You should have received a copy of the GNU General Public License
16: along with this program. If not, see <https://www.gnu.org/licenses/>. */
17:
18: /* written by Paul Eggert */
19:
20: #if __GNUC__ >= 3
21: @PRAGMA_SYSTEM_HEADER@
22: #endif
23: @PRAGMA_COLUMNS@
24:
25: #if defined __need_system_fcntl_h
26: /* Special invocation convention. */
27:
28: /* Needed before <sys/stat.h>.
29: May also define off_t to a 64-bit type on native Windows. */
30: #include <sys/types.h>
31: /* On some systems other than glibc, <sys/stat.h> is a prerequisite of
32: <fcntl.h>. On glibc systems, we would like to avoid namespace pollution.
33: But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
34: extern "C" { ... } block, which leads to errors in C++ mode with the
35: overridden <sys/stat.h> from gnulib. These errors are known to be gone
36: with g++ version >= 4.3. */
37: #if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && (defined __ICC || !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))))
38: # include <sys/stat.h>
39: #endif
40: #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
41:
42: #else
43: /* Normal invocation convention. */
44:
45: #ifndef _@GUARD_PREFIX@_FCNTL_H
46:
47: /* Needed before <sys/stat.h>.
48: May also define off_t to a 64-bit type on native Windows. */
49: #include <sys/types.h>
50: /* On some systems other than glibc, <sys/stat.h> is a prerequisite of
51: <fcntl.h>. On glibc systems, we would like to avoid namespace pollution.
52: But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an
53: extern "C" { ... } block, which leads to errors in C++ mode with the
54: overridden <sys/stat.h> from gnulib. These errors are known to be gone
55: with g++ version >= 4.3. */
56: #if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && (defined __ICC || !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))))
57: # include <sys/stat.h>
58: #endif
59: /* The include_next requires a split double-inclusion guard. */
60: #@INCLUDE_NEXT@ @NEXT_FCNTL_H@
61:
62: #ifndef _@GUARD_PREFIX@_FCNTL_H
63: #define _@GUARD_PREFIX@_FCNTL_H
64:
65: #ifndef __GLIBC__ /* Avoid namespace pollution on glibc systems. */
66: # include <unistd.h>
67: #endif
68:
69: /* Native Windows platforms declare open(), creat() in <io.h>. */
70: #if (@GNULIB_OPEN@ || defined GNULIB_POSIXCHECK) \
71: && (defined _WIN32 && ! defined __CYGWIN__)
72: # include <io.h>
73: #endif
74:
75:
76: /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
77:
78: /* The definition of _GL_ARG_NONNULL is copied here. */
79:
80: /* The definition of _GL_WARN_ON_USE is copied here. */
81:
82:
83: /* Declare overridden functions. */
84:
85: #if @GNULIB_FCNTL@
86: # if @REPLACE_FCNTL@
87: # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
88: # undef fcntl
89: # define fcntl rpl_fcntl
90: # endif
91: _GL_FUNCDECL_RPL (fcntl, int, (int fd, int action, ...));
92: _GL_CXXALIAS_RPL (fcntl, int, (int fd, int action, ...));
93: # else
94: # if !@HAVE_FCNTL@
95: _GL_FUNCDECL_SYS (fcntl, int, (int fd, int action, ...));
96: # endif
97: _GL_CXXALIAS_SYS (fcntl, int, (int fd, int action, ...));
98: # endif
99: _GL_CXXALIASWARN (fcntl);
100: #elif defined GNULIB_POSIXCHECK
101: # undef fcntl
102: # if HAVE_RAW_DECL_FCNTL
103: _GL_WARN_ON_USE (fcntl, "fcntl is not always POSIX compliant - "
104: "use gnulib module fcntl for portability");
105: # endif
106: #endif
107:
108: #if @GNULIB_OPEN@
109: # if @REPLACE_OPEN@
110: # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
111: # undef open
112: # define open rpl_open
113: # endif
114: _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
115: _GL_ARG_NONNULL ((1)));
116: _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
117: # else
118: _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
119: # endif
120: /* On HP-UX 11, in C++ mode, open() is defined as an inline function with a
121: default argument. _GL_CXXALIASWARN does not work in this case. */
122: # if !defined __hpux
123: _GL_CXXALIASWARN (open);
124: # endif
125: #elif defined GNULIB_POSIXCHECK
126: # undef open
127: /* Assume open is always declared. */
128: _GL_WARN_ON_USE (open, "open is not always POSIX compliant - "
129: "use gnulib module open for portability");
130: #endif
131:
132: #if @GNULIB_OPENAT@
133: # if @REPLACE_OPENAT@
134: # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
135: # undef openat
136: # define openat rpl_openat
137: # endif
138: _GL_FUNCDECL_RPL (openat, int,
139: (int fd, char const *file, int flags, /* mode_t mode */ ...)
140: _GL_ARG_NONNULL ((2)));
141: _GL_CXXALIAS_RPL (openat, int,
142: (int fd, char const *file, int flags, /* mode_t mode */ ...));
143: # else
144: # if !@HAVE_OPENAT@
145: _GL_FUNCDECL_SYS (openat, int,
146: (int fd, char const *file, int flags, /* mode_t mode */ ...)
147: _GL_ARG_NONNULL ((2)));
148: # endif
149: _GL_CXXALIAS_SYS (openat, int,
150: (int fd, char const *file, int flags, /* mode_t mode */ ...));
151: # endif
152: _GL_CXXALIASWARN (openat);
153: #elif defined GNULIB_POSIXCHECK
154: # undef openat
155: # if HAVE_RAW_DECL_OPENAT
156: _GL_WARN_ON_USE (openat, "openat is not portable - "
157: "use gnulib module openat for portability");
158: # endif
159: #endif
160:
161:
162: /* Fix up the FD_* macros, only known to be missing on mingw. */
163:
164: #ifndef FD_CLOEXEC
165: # define FD_CLOEXEC 1
166: #endif
167:
168: /* Fix up the supported F_* macros. Intentionally leave other F_*
169: macros undefined. Only known to be missing on mingw. */
170:
171: #ifndef F_DUPFD_CLOEXEC
172: # define F_DUPFD_CLOEXEC 0x40000000
173: /* Witness variable: 1 if gnulib defined F_DUPFD_CLOEXEC, 0 otherwise. */
174: # define GNULIB_defined_F_DUPFD_CLOEXEC 1
175: #else
176: # define GNULIB_defined_F_DUPFD_CLOEXEC 0
177: #endif
178:
179: #ifndef F_DUPFD
180: # define F_DUPFD 1
181: #endif
182:
183: #ifndef F_GETFD
184: # define F_GETFD 2
185: #endif
186:
187: /* Fix up the O_* macros. */
188:
189: /* AIX 7.1 with XL C 12.1 defines O_CLOEXEC, O_NOFOLLOW, and O_TTY_INIT
190: to values outside 'int' range, so omit these misdefinitions.
191: But avoid namespace pollution on non-AIX systems. */
192: #ifdef _AIX
193: # include <limits.h>
194: # if defined O_CLOEXEC && ! (INT_MIN <= O_CLOEXEC && O_CLOEXEC <= INT_MAX)
195: # undef O_CLOEXEC
196: # endif
197: # if defined O_NOFOLLOW && ! (INT_MIN <= O_NOFOLLOW && O_NOFOLLOW <= INT_MAX)
198: # undef O_NOFOLLOW
199: # endif
200: # if defined O_TTY_INIT && ! (INT_MIN <= O_TTY_INIT && O_TTY_INIT <= INT_MAX)
201: # undef O_TTY_INIT
202: # endif
203: #endif
204:
205: #if !defined O_DIRECT && defined O_DIRECTIO
206: /* Tru64 spells it 'O_DIRECTIO'. */
207: # define O_DIRECT O_DIRECTIO
208: #endif
209:
210: #if !defined O_CLOEXEC && defined O_NOINHERIT
211: /* Mingw spells it 'O_NOINHERIT'. */
212: # define O_CLOEXEC O_NOINHERIT
213: #endif
214:
215: #ifndef O_CLOEXEC
216: # define O_CLOEXEC 0x40000000 /* Try to not collide with system O_* flags. */
217: # define GNULIB_defined_O_CLOEXEC 1
218: #else
219: # define GNULIB_defined_O_CLOEXEC 0
220: #endif
221:
222: #ifndef O_DIRECT
223: # define O_DIRECT 0
224: #endif
225:
226: #ifndef O_DIRECTORY
227: # define O_DIRECTORY 0
228: #endif
229:
230: #ifndef O_DSYNC
231: # define O_DSYNC 0
232: #endif
233:
234: #ifndef O_EXEC
235: # define O_EXEC O_RDONLY /* This is often close enough in older systems. */
236: #endif
237:
238: #ifndef O_IGNORE_CTTY
239: # define O_IGNORE_CTTY 0
240: #endif
241:
242: #ifndef O_NDELAY
243: # define O_NDELAY 0
244: #endif
245:
246: #ifndef O_NOATIME
247: # define O_NOATIME 0
248: #endif
249:
250: #ifndef O_NONBLOCK
251: # define O_NONBLOCK O_NDELAY
252: #endif
253:
254: /* If the gnulib module 'nonblocking' is in use, guarantee a working non-zero
255: value of O_NONBLOCK. Otherwise, O_NONBLOCK is defined (above) to O_NDELAY
256: or to 0 as fallback. */
257: #if @GNULIB_NONBLOCKING@
258: # if O_NONBLOCK
259: # define GNULIB_defined_O_NONBLOCK 0
260: # else
261: # define GNULIB_defined_O_NONBLOCK 1
262: # undef O_NONBLOCK
263: # define O_NONBLOCK 0x40000000
264: # endif
265: #endif
266:
267: #ifndef O_NOCTTY
268: # define O_NOCTTY 0
269: #endif
270:
271: #ifndef O_NOFOLLOW
272: # define O_NOFOLLOW 0
273: #endif
274:
275: #ifndef O_NOLINK
276: # define O_NOLINK 0
277: #endif
278:
279: #ifndef O_NOLINKS
280: # define O_NOLINKS 0
281: #endif
282:
283: #ifndef O_NOTRANS
284: # define O_NOTRANS 0
285: #endif
286:
287: #ifndef O_RSYNC
288: # define O_RSYNC 0
289: #endif
290:
291: #ifndef O_SEARCH
292: # define O_SEARCH O_RDONLY /* This is often close enough in older systems. */
293: #endif
294:
295: #ifndef O_SYNC
296: # define O_SYNC 0
297: #endif
298:
299: #ifndef O_TTY_INIT
300: # define O_TTY_INIT 0
301: #endif
302:
303: #if ~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
304: # undef O_ACCMODE
305: # define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH)
306: #endif
307:
308: /* For systems that distinguish between text and binary I/O.
309: O_BINARY is usually declared in fcntl.h */
310: #if !defined O_BINARY && defined _O_BINARY
311: /* For MSC-compatible compilers. */
312: # define O_BINARY _O_BINARY
313: # define O_TEXT _O_TEXT
314: #endif
315:
316: #if defined __BEOS__ || defined __HAIKU__
317: /* BeOS 5 and Haiku have O_BINARY and O_TEXT, but they have no effect. */
318: # undef O_BINARY
319: # undef O_TEXT
320: #endif
321:
322: #ifndef O_BINARY
323: # define O_BINARY 0
324: # define O_TEXT 0
325: #endif
326:
327: /* Fix up the AT_* macros. */
328:
329: /* Work around a bug in Solaris 9 and 10: AT_FDCWD is positive. Its
330: value exceeds INT_MAX, so its use as an int doesn't conform to the
331: C standard, and GCC and Sun C complain in some cases. If the bug
332: is present, undef AT_FDCWD here, so it can be redefined below. */
333: #if 0 < AT_FDCWD && AT_FDCWD == 0xffd19553
334: # undef AT_FDCWD
335: #endif
336:
337: /* Use the same bit pattern as Solaris 9, but with the proper
338: signedness. The bit pattern is important, in case this actually is
339: Solaris with the above workaround. */
340: #ifndef AT_FDCWD
341: # define AT_FDCWD (-3041965)
342: #endif
343:
344: /* Use the same values as Solaris 9. This shouldn't matter, but
345: there's no real reason to differ. */
346: #ifndef AT_SYMLINK_NOFOLLOW
347: # define AT_SYMLINK_NOFOLLOW 4096
348: #endif
349:
350: #ifndef AT_REMOVEDIR
351: # define AT_REMOVEDIR 1
352: #endif
353:
354: /* Solaris 9 lacks these two, so just pick unique values. */
355: #ifndef AT_SYMLINK_FOLLOW
356: # define AT_SYMLINK_FOLLOW 2
357: #endif
358:
359: #ifndef AT_EACCESS
360: # define AT_EACCESS 4
361: #endif
362:
363:
364: #endif /* _@GUARD_PREFIX@_FCNTL_H */
365: #endif /* _@GUARD_PREFIX@_FCNTL_H */
366: #endif
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