From 4b88e6e858b55def2ef0392278ddf81835f2ac45 Mon Sep 17 00:00:00 2001 From: Salvatore Cro Date: Thu, 9 Sep 2010 16:01:04 +0200 Subject: libc: Fix cancellation handling in some C functions According to POSIX.1-2008 standard, the following syscalls shall be cancellation points : waitid, sleep, fdatasync, ppoll. Further, if generic syscall is not available and stubs are configured, provide the stub implementation for function. Signed-off-by: Salvatore Cro Signed-off-by: Carmelo Amoroso --- libc/sysdeps/linux/common/fdatasync.c | 35 ++++++++++++++++++++++++++++++++++- 1 file changed, 34 insertions(+), 1 deletion(-) (limited to 'libc/sysdeps/linux/common/fdatasync.c') diff --git a/libc/sysdeps/linux/common/fdatasync.c b/libc/sysdeps/linux/common/fdatasync.c index a40f3e00c..19d37b6e0 100644 --- a/libc/sysdeps/linux/common/fdatasync.c +++ b/libc/sysdeps/linux/common/fdatasync.c @@ -14,4 +14,37 @@ # define __NR_fdatasync __NR_osf_fdatasync #endif -_syscall1(int, fdatasync, int, fd) +#ifdef __NR_fdatasync + +# ifdef __UCLIBC_HAS_THREADS_NATIVE__ +# include +# else +# define SINGLE_THREAD_P 1 +# endif + +#define __NR___syscall_fdatasync __NR_fdatasync + +static __always_inline +_syscall1(int, __syscall_fdatasync, int, fd) + +int fdatasync(int fd) +{ + if (SINGLE_THREAD_P) + return __syscall_fdatasync(fd); + +# ifdef __UCLIBC_HAS_THREADS_NATIVE__ + int oldtype = LIBC_CANCEL_ASYNC (); + int result = __syscall_fdatasync(fd); + LIBC_CANCEL_RESET (oldtype); + return result; +# endif +} + +#elif defined __UCLIBC_HAS_STUBS__ +/* no syscall available, so provide a stub */ +int fdatasync(int fd) +{ + __set_errno(ENOSYS); + return -1; +} +#endif -- cgit v1.2.3