aboutsummaryrefslogtreecommitdiff
path: root/support
diff options
context:
space:
mode:
authorFlorian Weimer <fweimer@redhat.com>2017-12-22 10:55:40 +0100
committerFlorian Weimer <fweimer@redhat.com>2017-12-22 10:55:40 +0100
commitbad7a0c81f501fbbcc79af9eaa4b8254441c4a1f (patch)
tree2734074b2ca53301953e238e6ce362bdc94f9604 /support
parent6cb86fd21ca6fdfc31042cda8c37f96c46b8a4da (diff)
downloadglibc-bad7a0c81f501fbbcc79af9eaa4b8254441c4a1f.tar
glibc-bad7a0c81f501fbbcc79af9eaa4b8254441c4a1f.tar.gz
glibc-bad7a0c81f501fbbcc79af9eaa4b8254441c4a1f.tar.bz2
glibc-bad7a0c81f501fbbcc79af9eaa4b8254441c4a1f.zip
copy_file_range: New function to copy file data
The semantics are based on the Linux system call, but a very close emulation in user space is provided.
Diffstat (limited to 'support')
-rw-r--r--support/Makefile3
-rw-r--r--support/support-xfstat.c28
-rw-r--r--support/xftruncate.c27
-rw-r--r--support/xlseek.c29
-rw-r--r--support/xunistd.h3
5 files changed, 90 insertions, 0 deletions
diff --git a/support/Makefile b/support/Makefile
index bfde79333e..8458840cd8 100644
--- a/support/Makefile
+++ b/support/Makefile
@@ -36,6 +36,7 @@ libsupport-routines = \
oom_error \
resolv_test \
set_fortify_handler \
+ support-xfstat \
support-xstat \
support_become_root \
support_can_chroot \
@@ -73,8 +74,10 @@ libsupport-routines = \
xfclose \
xfopen \
xfork \
+ xftruncate \
xgetsockname \
xlisten \
+ xlseek \
xmalloc \
xmemstream \
xmkdir \
diff --git a/support/support-xfstat.c b/support/support-xfstat.c
new file mode 100644
index 0000000000..4c8ee9142b
--- /dev/null
+++ b/support/support-xfstat.c
@@ -0,0 +1,28 @@
+/* fstat64 with error checking.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <support/check.h>
+#include <support/xunistd.h>
+#include <sys/stat.h>
+
+void
+xfstat (int fd, struct stat64 *result)
+{
+ if (fstat64 (fd, result) != 0)
+ FAIL_EXIT1 ("fstat64 (%d): %m", fd);
+}
diff --git a/support/xftruncate.c b/support/xftruncate.c
new file mode 100644
index 0000000000..9c4e9e3050
--- /dev/null
+++ b/support/xftruncate.c
@@ -0,0 +1,27 @@
+/* ftruncate with error checking.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <support/check.h>
+#include <support/xunistd.h>
+
+void
+xftruncate (int fd, long long length)
+{
+ if (ftruncate64 (fd, length) != 0)
+ FAIL_EXIT1 ("ftruncate64 (%d, %lld): %m", fd, length);
+}
diff --git a/support/xlseek.c b/support/xlseek.c
new file mode 100644
index 0000000000..0a75a9f2e6
--- /dev/null
+++ b/support/xlseek.c
@@ -0,0 +1,29 @@
+/* lseek with error checking.
+ Copyright (C) 2017 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <support/check.h>
+#include <support/xunistd.h>
+
+long long
+xlseek (int fd, long long offset, int whence)
+{
+ long long result = lseek64 (fd, offset, whence);
+ if (result < 0)
+ FAIL_EXIT1 ("lseek64 (%d, %lld, %d): %m", fd, offset, whence);
+ return result;
+}
diff --git a/support/xunistd.h b/support/xunistd.h
index 00376f7aae..29da063c15 100644
--- a/support/xunistd.h
+++ b/support/xunistd.h
@@ -36,10 +36,13 @@ void xpipe (int[2]);
void xdup2 (int, int);
int xopen (const char *path, int flags, mode_t);
void xstat (const char *path, struct stat64 *);
+void xfstat (int fd, struct stat64 *);
void xmkdir (const char *path, mode_t);
void xchroot (const char *path);
void xunlink (const char *path);
long xsysconf (int name);
+long long xlseek (int fd, long long offset, int whence);
+void xftruncate (int fd, long long length);
/* Read the link at PATH. The caller should free the returned string
with free. */