fdopendir: optimize on mingw

[gnulib.git] / lib / unistd.in.h

diff --git a/lib/unistd.in.h b/lib/unistd.in.h
index fa8616a..fe645b7 100644 (file)
--- a/lib/unistd.in.h
+++ b/lib/unistd.in.h
@@ -1,5 +1,5 @@
 /* Substitute for and wrapper around <unistd.h>.
-   Copyright (C) 2003-2008 Free Software Foundation, Inc.
+   Copyright (C) 2003-2009 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -29,12 +29,16 @@
 #ifndef _GL_UNISTD_H
 #define _GL_UNISTD_H
 
-/* mingw doesn't define the SEEK_* macros in <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>
 #endif
 
 /* mingw fails to declare _exit in <unistd.h>.  */
+/* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>.  */
 #include <stdlib.h>
 
 #if @GNULIB_WRITE@ && @REPLACE_WRITE@ && @GNULIB_UNISTD_H_SIGPIPE@
@@ -42,6 +46,11 @@
 # 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@
@@ -86,6 +95,17 @@
 /* The definition of GL_LINK_WARNING is copied here.  */
 
 
+/* OS/2 EMX lacks these macros.  */
+#ifndef STDIN_FILENO
+# define STDIN_FILENO 0
+#endif
+#ifndef STDOUT_FILENO
+# define STDOUT_FILENO 1
+#endif
+#ifndef STDERR_FILENO
+# define STDERR_FILENO 2
+#endif
+
 /* Declare overridden functions.  */
 
 #ifdef __cplusplus
@@ -119,17 +139,13 @@ extern int chown (const char *file, uid_t uid, gid_t gid);
 
 
 #if @GNULIB_CLOSE@
-# if @UNISTD_H_HAVE_WINSOCK2_H@
-/* Need a gnulib internal function.  */
-#  define HAVE__GL_CLOSE_FD_MAYBE_SOCKET 1
-# endif
 # if @REPLACE_CLOSE@
 /* Automatically included by modules that need a replacement for close.  */
 #  undef 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
@@ -142,10 +158,13 @@ extern int close (int);
 
 
 #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);
@@ -159,6 +178,28 @@ 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
@@ -206,8 +247,12 @@ extern int fchdir (int /*fd*/);
 
 #  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
@@ -305,7 +350,8 @@ extern int getdomainname(char *name, size_t len);
 
 #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
@@ -355,7 +401,6 @@ extern int gethostname(char *name, size_t len);
    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
@@ -474,6 +519,23 @@ extern int lchown (char const *file, uid_t owner, gid_t group);
 #endif
 
 
+#if @GNULIB_LINK@
+/* 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@
+extern int link (const char *path1, const char *path2);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef link
+# define link(path1,path2) \
+    (GL_LINK_WARNING ("link is unportable - " \
+                      "use gnulib module link for portability"), \
+     link (path1, path2))
+#endif
+
+
 #if @GNULIB_LSEEK@
 # if @REPLACE_LSEEK@
 /* Set the offset of FD relative to SEEK_SET, SEEK_CUR, or SEEK_END.
@@ -492,6 +554,28 @@ extern int lchown (char const *file, uid_t owner, gid_t group);
 #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
@@ -499,7 +583,6 @@ extern int lchown (char const *file, uid_t owner, gid_t group);
    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
@@ -538,12 +621,6 @@ extern ssize_t write (int fd, const void *buf, size_t count);
 #endif
 
 
-#ifdef FCHDIR_REPLACEMENT
-/* gnulib internal function.  */
-extern void _gl_unregister_fd (int fd);
-#endif
-
-
 #ifdef __cplusplus
 }
 #endif