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commit 7a7226543611897103c7483bec160547294dcf0d
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Author: Alexandra Hájková <ahajkova@redhat.com>
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Date:   Sat Dec 26 20:44:34 2020 +0100
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     Add xfchmod to libsupport
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diff --git a/support/Makefile b/support/Makefile
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index d2b95539403e416c..4875f52495ef292d 100644
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--- a/support/Makefile
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+++ b/support/Makefile
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@@ -91,6 +91,7 @@ libsupport-routines = \
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   xdlfcn \
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   xdlmopen \
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   xdup2 \
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+  xfchmod \
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   xfclose \
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   xfopen \
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   xfork \
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diff --git a/support/xfchmod.c b/support/xfchmod.c
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new file mode 100644
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index 0000000000000000..4323b9ca8e078c98
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--- /dev/null
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+++ b/support/xfchmod.c
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@@ -0,0 +1,28 @@
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+/* fchmod with error checking.
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+   Copyright (C) 2021 Free Software Foundation, Inc.
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+   This file is part of the GNU C Library.
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+
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+   The GNU C Library is free software; you can redistribute it and/or
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+   modify it under the terms of the GNU Lesser General Public
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+   License as published by the Free Software Foundation; either
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+   version 2.1 of the License, or (at your option) any later version.
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+
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+   The GNU C Library is distributed in the hope that it will be useful,
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+   but WITHOUT ANY WARRANTY; without even the implied warranty of
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+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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+   Lesser General Public License for more details.
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+
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+   You should have received a copy of the GNU Lesser General Public
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+   License along with the GNU C Library; if not, see
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+   <https://www.gnu.org/licenses/>.  */
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+
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+#include <support/check.h>
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+#include <support/xunistd.h>
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+#include <sys/stat.h>
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+
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+void
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+xfchmod (int fd, mode_t mode)
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+{
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+  if (fchmod (fd, mode) != 0)
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+    FAIL_EXIT1 ("fchmod (%d, 0%o): %m", fd, mode);
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+}
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diff --git a/support/xunistd.h b/support/xunistd.h
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index 74fd2771d12c36fe..ced8cb1dd9ee356c 100644
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--- a/support/xunistd.h
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+++ b/support/xunistd.h
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@@ -45,6 +45,7 @@ long long xlseek (int fd, long long offset, int whence);
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 void xftruncate (int fd, long long length);
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 void xsymlink (const char *target, const char *linkpath);
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 void xchdir (const char *path);
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+void xfchmod (int fd, mode_t mode);
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 /* Equivalent of "mkdir -p".  */
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 void xmkdirp (const char *, mode_t);