2 @section @file{fcntl.h}
4 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/fcntl.h.html}
8 Portability problems fixed by Gnulib:
11 The type @code{pid_t} is not defined on some platforms:
15 The type @code{mode_t} is not defined on some platforms:
19 @samp{O_CLOEXEC}, @samp{O_DIRECTORY}, @samp{O_DSYNC}, @samp{O_NOCTTY},
20 @samp{O_NOFOLLOW}, @samp{O_RSYNC}, @samp{O_SYNC},
21 and @samp{O_TTY_INIT} are not defined on some platforms. Gnulib defines
22 these macros to 0, which is generally safe.
25 @samp{O_NONBLOCK} is not defined on some platforms. If the
26 @samp{nonblocking} module is in use, gnulib guarantees a working
27 non-zero value; otherwise, the gnulib replacement is 0.
30 @samp{O_EXEC} and @samp{O_SEARCH} are not defined on some platforms.
31 Gnulib defines these macros to @samp{O_RDONLY}, which is typically 0.
34 @samp{O_ACCMODE} is not defined on some platforms:
38 The @samp{O_ACCMODE} mask mistakenly omits @samp{O_SEARCH} and
39 @samp{O_EXEC} on some platforms:
43 @samp{O_BINARY}, @samp{O_TEXT} (not specified by POSIX, but essential for
44 portability to native Windows platforms) are defined on some platforms but
48 @samp{O_DIRECT}, @samp{O_NDELAY}, @samp{O_NOATIME},
49 and @samp{O_NOLINKS} (not specified by POSIX) are defined
50 on some platforms but not on others.
53 @samp{FD_CLOEXEC}, @samp{F_DUPFD}, and @samp{F_GETFD} are not defined
58 @samp{F_DUPFD_CLOEXEC} is not defined on some platforms:
59 MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, HP-UX 11,
60 IRIX 6.5, OSF/1 5.1, Solaris 11 2010-11, Cygwin 1.7.1, mingw, MSVC 9, Interix 3.5,
64 @samp{AT_FDCWD}, @samp{AT_EACCESS}, @samp{AT_SYMLINK_NOFOLLOW},
65 @samp{AT_SYMLINK_FOLLOW}, and @samp{AT_REMOVEDIR}
66 are not defined on many platforms:
67 glibc 2.3.6, MacOS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX
68 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 8, Cygwin 1.5.x, mingw, MSVC 9, Interix 3.5, BeOS.
71 @samp{AT_FDCWD} is defined with a value too large for an @code{int} on some
76 Portability problems not fixed by Gnulib:
79 @samp{F_SETFD}, @samp{F_GETFL}, @samp{F_SETFL}, @samp{F_GETLK},
80 @samp{F_SETLK}, @samp{F_SETLOKW}, @samp{F_GETOWN}, and @samp{F_SETOWN}
81 are not defined on some platforms:
85 @samp{POSIX_FADV_DONTNEED}, @samp{POSIX_FADV_NOREUSE},
86 @samp{POSIX_FADV_NORMAL}, @samp{POSIX_FADV_RANDOM},
87 @samp{POSIX_FADV_SEQUENTIAL}, and @samp{POSIX_FADV_WILLNEED} are not
88 defined on some platforms.