#ifndef _GL_UNISTD_H
#define _GL_UNISTD_H
+/* NetBSD 5.0 mis-defines NULL. Also get size_t. */
+#include <stddef.h>
+
/* mingw doesn't define the SEEK_* or *_FILENO macros in <unistd.h>. */
#if !(defined SEEK_CUR && defined SEEK_END && defined SEEK_SET)
# include <stdio.h>
# include <sys/types.h>
#endif
+/* Get getopt(), optarg, optind, opterr, optopt. */
+#if @GNULIB_UNISTD_H_GETOPT@
+# include <getopt.h>
+#endif
+
#if @GNULIB_GETHOSTNAME@
/* Get all possible declarations of gethostname(). */
# if @UNISTD_H_HAVE_WINSOCK2_H@
# define STDERR_FILENO 2
#endif
+/* Ensure *_OK functions exist. */
+#ifndef F_OK
+# define F_OK 0
+# define X_OK 1
+# define W_OK 2
+# define R_OK 4
+#endif
+
+
/* Declare overridden functions. */
#ifdef __cplusplus
#endif
+#if @GNULIB_FCHOWNAT@
+# if @REPLACE_FCHOWNAT@
+# undef fchownat
+# define fchownat rpl_fchownat
+# endif
+# if !@HAVE_FCHOWNAT@ || @REPLACE_FCHOWNAT@
+extern int fchownat (int fd, char const *file, uid_t owner, gid_t group, int flag);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef fchownat
+# define fchownat(d,n,o,g,f) \
+ (GL_LINK_WARNING ("fchownat is not portable - " \
+ "use gnulib module openat for portability"), \
+ fchownat (d, n, o, g, f))
+#endif
+
+
+#if @GNULIB_UNLINKAT@
+# if !@HAVE_UNLINKAT@
+extern int unlinkat (int fd, char const *file, int flag);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef unlinkat
+# define unlinkat(d,n,f) \
+ (GL_LINK_WARNING ("unlinkat is not portable - " \
+ "use gnulib module openat for portability"), \
+ unlinkat (d, n, f))
+#endif
+
+
+#if @GNULIB_FACCESSAT@
+# if !@HAVE_FACCESSAT@
+int faccessat (int fd, char const *file, int mode, int flag);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef faccessat
+# define faccessat(d,n,m,f) \
+ (GL_LINK_WARNING ("faccessat is not portable - " \
+ "use gnulib module faccessat for portability"), \
+ faccessat (d, n, m, f))
+#endif
+
+#if @GNULIB_SYMLINKAT@
+# if !@HAVE_SYMLINKAT@
+int symlinkat (char const *contents, int fd, char const *file);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef symlinkat
+# define symlinkat(c,d,n) \
+ (GL_LINK_WARNING ("symlinkat is not portable - " \
+ "use gnulib module symlinkat for portability"), \
+ symlinkat (c, d, n))
+#endif
+
+#if @GNULIB_READLINKAT@
+# if !@HAVE_READLINKAT@
+ssize_t readlinkat (int fd, char const *file, char *buf, size_t len);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef readlinkat
+# define readlinkat(d,n,b,l) \
+ (GL_LINK_WARNING ("readlinkat is not portable - " \
+ "use gnulib module symlinkat for portability"), \
+ readlinkat (d, n, b, l))
+#endif
+
#if @GNULIB_CLOSE@
# if @REPLACE_CLOSE@
/* Automatically included by modules that need a replacement for close. */
# define close rpl_close
extern int close (int);
# endif
-#elif @UNISTD_H_HAVE_WINSOCK2_H@
+#elif @UNISTD_H_HAVE_WINSOCK2_H_AND_USE_SOCKETS@
# undef close
# define close close_used_without_requesting_gnulib_module_close
#elif defined GNULIB_POSIXCHECK
#if @GNULIB_DUP2@
-# if !@HAVE_DUP2@
+# if @REPLACE_DUP2@
+# define dup2 rpl_dup2
+# endif
+# if !@HAVE_DUP2@ || @REPLACE_DUP2@
/* Copy the file descriptor OLDFD into file descriptor NEWFD. Do nothing if
NEWFD = OLDFD, otherwise close NEWFD first if it is open.
- Return 0 if successful, otherwise -1 and errno set.
+ Return newfd if successful, otherwise -1 and errno set.
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/dup2.html>. */
extern int dup2 (int oldfd, int newfd);
#endif
+#if @GNULIB_DUP3@
+/* Copy the file descriptor OLDFD into file descriptor NEWFD, with the
+ specified flags.
+ The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
+ and O_TEXT, O_BINARY (defined in "binary-io.h").
+ Close NEWFD first if it is open.
+ Return newfd if successful, otherwise -1 and errno set.
+ See the Linux man page at
+ <http://www.kernel.org/doc/man-pages/online/pages/man2/dup3.2.html>. */
+# if @HAVE_DUP3@
+# define dup3 rpl_dup3
+# endif
+extern int dup3 (int oldfd, int newfd, int flags);
+#elif defined GNULIB_POSIXCHECK
+# undef dup3
+# define dup3(o,n,f) \
+ (GL_LINK_WARNING ("dup3 is unportable - " \
+ "use gnulib module dup3 for portability"), \
+ dup3 (o, n, f))
+#endif
+
+
#if @GNULIB_ENVIRON@
# if !@HAVE_DECL_ENVIRON@
/* Set of environment variables and values. An array of strings of the form
# define dup rpl_dup
extern int dup (int);
-# define dup2 rpl_dup2
-extern int dup2 (int, int);
+
+/* Gnulib internal hooks needed to maintain the fchdir metadata. */
+extern int _gl_register_fd (int fd, const char *filename);
+extern void _gl_unregister_fd (int fd);
+extern int _gl_register_dup (int oldfd, int newfd);
+extern const char *_gl_directory_name (int fd);
# endif
#elif defined GNULIB_POSIXCHECK
#if @GNULIB_GETDTABLESIZE@
# if !@HAVE_GETDTABLESIZE@
-/* Return the maximum number of file descriptors in the current process. */
+/* Return the maximum number of file descriptors in the current process.
+ In POSIX, this is same as sysconf (_SC_OPEN_MAX). */
extern int getdtablesize (void);
# endif
#elif defined GNULIB_POSIXCHECK
See <http://www.opengroup.org/susv3xsh/getlogin.html>.
*/
# if !@HAVE_DECL_GETLOGIN_R@
-# include <stddef.h>
extern int getlogin_r (char *name, size_t size);
# endif
#elif defined GNULIB_POSIXCHECK
#if @GNULIB_LINK@
+# if @REPLACE_LINK@
+# define link rpl_link
+# endif
/* Create a new hard link for an existing file.
Return 0 if successful, otherwise -1 and errno set.
See POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/link.html>. */
-# if !@HAVE_LINK@
+# if !@HAVE_LINK@ || @REPLACE_LINK@
extern int link (const char *path1, const char *path2);
# endif
#elif defined GNULIB_POSIXCHECK
#endif
+#if @GNULIB_PIPE2@
+/* Create a pipe, applying the given flags when opening the read-end of the
+ pipe and the write-end of the pipe.
+ The flags are a bitmask, possibly including O_CLOEXEC (defined in <fcntl.h>)
+ and O_TEXT, O_BINARY (defined in "binary-io.h").
+ Store the read-end as fd[0] and the write-end as fd[1].
+ Return 0 upon success, or -1 with errno set upon failure.
+ See also the Linux man page at
+ <http://www.kernel.org/doc/man-pages/online/pages/man2/pipe2.2.html>. */
+# if @HAVE_PIPE2@
+# define pipe2 rpl_pipe2
+# endif
+extern int pipe2 (int fd[2], int flags);
+#elif defined GNULIB_POSIXCHECK
+# undef pipe2
+# define pipe2(f,o) \
+ (GL_LINK_WARNING ("pipe2 is unportable - " \
+ "use gnulib module pipe2 for portability"), \
+ pipe2 (f, o))
+#endif
+
+
#if @GNULIB_READLINK@
/* Read the contents of the symbolic link FILE and place the first BUFSIZE
bytes of it into BUF. Return the number of bytes placed into BUF if
See the POSIX:2001 specification
<http://www.opengroup.org/susv3xsh/readlink.html>. */
# if !@HAVE_READLINK@
-# include <stddef.h>
extern int readlink (const char *file, char *buf, size_t bufsize);
# endif
#elif defined GNULIB_POSIXCHECK
#endif
-#ifdef FCHDIR_REPLACEMENT
-/* gnulib internal function. */
-extern void _gl_unregister_fd (int fd);
-#endif
-
-
#ifdef __cplusplus
}
#endif
projects / gnulib.git / blobdiff