From 95d0307cc10ca3df879c1be519f1ad650efb20a8 Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Tue, 23 Jan 2018 11:53:31 +0100 Subject: [PATCH] linux-user: implement renameat2 This is needed for new architectures like RISC-V which do not provide any other rename-like syscall. Signed-off-by: Andreas Schwab Reviewed-by: Laurent Vivier Message-Id: Signed-off-by: Laurent Vivier --- linux-user/syscall.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 104408c050..74378947f0 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -600,6 +600,24 @@ static int sys_utimensat(int dirfd, const char *pathname, #endif #endif /* TARGET_NR_utimensat */ +#ifdef TARGET_NR_renameat2 +#if defined(__NR_renameat2) +#define __NR_sys_renameat2 __NR_renameat2 +_syscall5(int, sys_renameat2, int, oldfd, const char *, old, int, newfd, + const char *, new, unsigned int, flags) +#else +static int sys_renameat2(int oldfd, const char *old, + int newfd, const char *new, int flags) +{ + if (flags == 0) { + return renameat(oldfd, old, newfd, new); + } + errno = ENOSYS; + return -1; +} +#endif +#endif /* TARGET_NR_renameat2 */ + #ifdef CONFIG_INOTIFY #include @@ -8426,6 +8444,22 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, } break; #endif +#if defined(TARGET_NR_renameat2) + case TARGET_NR_renameat2: + { + void *p2; + p = lock_user_string(arg2); + p2 = lock_user_string(arg4); + if (!p || !p2) { + ret = -TARGET_EFAULT; + } else { + ret = get_errno(sys_renameat2(arg1, p, arg3, p2, arg5)); + } + unlock_user(p2, arg4, 0); + unlock_user(p, arg2, 0); + } + break; +#endif #ifdef TARGET_NR_mkdir case TARGET_NR_mkdir: if (!(p = lock_user_string(arg1))) -- 2.11.0