58 lines
1.6 KiB
Diff
58 lines
1.6 KiB
Diff
From 05ce67fea99ca09cd4b6625cff7aec9cc222dd5a Mon Sep 17 00:00:00 2001
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From: Tony Ambardar <tony.ambardar@gmail.com>
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Date: Mon, 6 May 2024 20:28:32 -0700
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Subject: [PATCH] add renameat2 linux syscall wrapper
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This syscall is available since Linux 3.15 and also implemented in
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glibc from version 2.28. It is commonly used in filesystem or security
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contexts.
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Constants RENAME_NOREPLACE, RENAME_EXCHANGE, RENAME_WHITEOUT are
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guarded by _GNU_SOURCE as with glibc.
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---
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include/stdio.h | 7 +++++++
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src/linux/renameat2.c | 11 +++++++++++
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2 files changed, 18 insertions(+)
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create mode 100644 src/linux/renameat2.c
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Bug-Debian: https://bugs.debian.org/1105007
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diff --git a/include/stdio.h b/include/stdio.h
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index cb858618..4ea4c170 100644
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--- a/include/stdio.h
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+++ b/include/stdio.h
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@@ -158,6 +158,13 @@ char *ctermid(char *);
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#define L_ctermid 20
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#endif
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+#if defined(_GNU_SOURCE)
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+#define RENAME_NOREPLACE (1 << 0)
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+#define RENAME_EXCHANGE (1 << 1)
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+#define RENAME_WHITEOUT (1 << 2)
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+
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+int renameat2(int, const char *, int, const char *, unsigned);
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+#endif
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#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
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|| defined(_BSD_SOURCE)
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diff --git a/src/linux/renameat2.c b/src/linux/renameat2.c
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new file mode 100644
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index 00000000..b8060388
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--- /dev/null
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+++ b/src/linux/renameat2.c
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@@ -0,0 +1,11 @@
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+#define _GNU_SOURCE
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+#include <stdio.h>
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+#include "syscall.h"
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+
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+int renameat2(int oldfd, const char *old, int newfd, const char *new, unsigned flags)
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+{
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+#ifdef SYS_renameat
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+ if (!flags) return syscall(SYS_renameat, oldfd, old, newfd, new);
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+#endif
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+ return syscall(SYS_renameat2, oldfd, old, newfd, new, flags);
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+}
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--
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2.49.0
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