X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=lib%2Fdup2.c;h=c7d176728d4ba110fdc9cbf983f6df433d09e116;hb=92249085071a973e2c0621b0415b93d2e48bb00d;hp=9219eb38238629e84649330b18079773ee39a058;hpb=d738e90e8360e101b94fca8c79147f59565f62d8;p=debian%2Fgzip
diff --git a/lib/dup2.c b/lib/dup2.c
index 9219eb3..c7d1767 100644
--- a/lib/dup2.c
+++ b/lib/dup2.c
@@ -1,6 +1,6 @@
/* Duplicate an open file descriptor to a specified file descriptor.
- Copyright (C) 1999, 2004-2007, 2009-2013 Free Software Foundation, Inc.
+ Copyright (C) 1999, 2004-2007, 2009-2018 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
@@ -13,7 +13,7 @@
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program. If not, see . */
+ along with this program. If not, see . */
/* written by Paul Eggert */
@@ -29,16 +29,45 @@
# undef dup2
-# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# if defined _WIN32 && ! defined __CYGWIN__
/* Get declarations of the native Windows API functions. */
# define WIN32_LEAN_AND_MEAN
# include
-# include "msvc-inval.h"
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+# include "msvc-inval.h"
+# endif
/* Get _get_osfhandle. */
-# include "msvc-nothrow.h"
+# if GNULIB_MSVC_NOTHROW
+# include "msvc-nothrow.h"
+# else
+# include
+# endif
+
+# if HAVE_MSVC_INVALID_PARAMETER_HANDLER
+static int
+dup2_nothrow (int fd, int desired_fd)
+{
+ int result;
+
+ TRY_MSVC_INVAL
+ {
+ result = dup2 (fd, desired_fd);
+ }
+ CATCH_MSVC_INVAL
+ {
+ errno = EBADF;
+ result = -1;
+ }
+ DONE_MSVC_INVAL;
+
+ return result;
+}
+# else
+# define dup2_nothrow dup2
+# endif
static int
ms_windows_dup2 (int fd, int desired_fd)
@@ -59,23 +88,14 @@ ms_windows_dup2 (int fd, int desired_fd)
}
/* Wine 1.0.1 return 0 when desired_fd is negative but not -1:
- http://bugs.winehq.org/show_bug.cgi?id=21289 */
+ https://bugs.winehq.org/show_bug.cgi?id=21289 */
if (desired_fd < 0)
{
errno = EBADF;
return -1;
}
- TRY_MSVC_INVAL
- {
- result = dup2 (fd, desired_fd);
- }
- CATCH_MSVC_INVAL
- {
- errno = EBADF;
- result = -1;
- }
- DONE_MSVC_INVAL;
+ result = dup2_nothrow (fd, desired_fd);
if (result == 0)
result = desired_fd;
@@ -85,6 +105,57 @@ ms_windows_dup2 (int fd, int desired_fd)
# define dup2 ms_windows_dup2
+# elif defined __KLIBC__
+
+# include
+
+static int
+klibc_dup2dirfd (int fd, int desired_fd)
+{
+ int tempfd;
+ int dupfd;
+
+ tempfd = open ("NUL", O_RDONLY);
+ if (tempfd == -1)
+ return -1;
+
+ if (tempfd == desired_fd)
+ {
+ close (tempfd);
+
+ char path[_MAX_PATH];
+ if (__libc_Back_ioFHToPath (fd, path, sizeof (path)))
+ return -1;
+
+ return open(path, O_RDONLY);
+ }
+
+ dupfd = klibc_dup2dirfd (fd, desired_fd);
+
+ close (tempfd);
+
+ return dupfd;
+}
+
+static int
+klibc_dup2 (int fd, int desired_fd)
+{
+ int dupfd;
+ struct stat sbuf;
+
+ dupfd = dup2 (fd, desired_fd);
+ if (dupfd == -1 && errno == ENOTSUP \
+ && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode))
+ {
+ close (desired_fd);
+
+ return klibc_dup2dirfd (fd, desired_fd);
+ }
+
+ return dupfd;
+}
+
+# define dup2 klibc_dup2
# endif
int
@@ -96,7 +167,11 @@ rpl_dup2 (int fd, int desired_fd)
/* On Linux kernels 2.6.26-2.6.29, dup2 (fd, fd) returns -EBADF.
On Cygwin 1.5.x, dup2 (1, 1) returns 0.
On Cygwin 1.7.17, dup2 (1, -1) dumps core.
+ On Cygwin 1.7.25, dup2 (1, 256) can dump core.
On Haiku, dup2 (fd, fd) mistakenly clears FD_CLOEXEC. */
+# if HAVE_SETDTABLESIZE
+ setdtablesize (desired_fd + 1);
+# endif
if (desired_fd < 0)
fd = desired_fd;
if (fd == desired_fd)