diff --git a/toolchain/musl/patches/610-add-renameat2-linux-syscall-wrapper.patch b/toolchain/musl/patches/610-add-renameat2-linux-syscall-wrapper.patch new file mode 100644 index 00000000000..167769360e3 --- /dev/null +++ b/toolchain/musl/patches/610-add-renameat2-linux-syscall-wrapper.patch @@ -0,0 +1,61 @@ +From dc651fe2e6b16087c519c0bd0bf943cb7c53c807 Mon Sep 17 00:00:00 2001 +In-Reply-To: <20240423234355.2414567-1-Tony.Ambardar@gmail.com> +References: <20240423234355.2414567-1-Tony.Ambardar@gmail.com> +From: Tony Ambardar +Date: Sat, 20 Apr 2024 21:30:13 -0700 +Subject: [PATCH v3] add renameat2 linux syscall wrapper +To: musl@lists.openwall.com +Cc: Rich Felker + +This syscall is available since Linux 3.15 and also implemented in glibc +from version 2.28. It is commonly used in filesystem or security contexts. + +Constants RENAME_NOREPLACE, RENAME_EXCHANGE, RENAME_WHITEOUT are guarded by +_GNU_SOURCE as with glibc. + +Signed-off-by: Tony Ambardar +--- +v2 -> v3: + * call SYS_renameat first if applicable + * drop unneeded error code handling + +v1 -> v2: + * align related constants + * drop 'int' from 'unsigned int' + * add fallback to SYS_renameat where applicable +--- + include/stdio.h | 7 +++++++ + src/linux/renameat2.c | 11 +++++++++++ + 2 files changed, 18 insertions(+) + create mode 100644 src/linux/renameat2.c + +--- a/include/stdio.h ++++ b/include/stdio.h +@@ -158,6 +158,13 @@ char *ctermid(char *); + #define L_ctermid 20 + #endif + ++#if defined(_GNU_SOURCE) ++#define RENAME_NOREPLACE (1 << 0) ++#define RENAME_EXCHANGE (1 << 1) ++#define RENAME_WHITEOUT (1 << 2) ++ ++int renameat2(int, const char *, int, const char *, unsigned); ++#endif + + #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \ + || defined(_BSD_SOURCE) +--- /dev/null ++++ b/src/linux/renameat2.c +@@ -0,0 +1,11 @@ ++#define _GNU_SOURCE ++#include ++#include "syscall.h" ++ ++int renameat2(int oldfd, const char *old, int newfd, const char *new, unsigned flags) ++{ ++#ifdef SYS_renameat ++ if (!flags) return syscall(SYS_renameat, oldfd, old, newfd, new); ++#endif ++ return syscall(SYS_renameat2, oldfd, old, newfd, new, flags); ++}