From ae0e6225db6dacb4d4de81245fba8671526dfe90 Mon Sep 17 00:00:00 2001 From: Khem Raj Date: Fri, 3 Feb 2012 20:06:55 -0800 Subject: lstat/stat/fstat: Use 64bit version of syscall if available This is needed for stat'ing loop devices > 255 since otherwise kernel returns EOVERFLOW becasue it needs st_rdev/st_dev to be larger than 16bits but in kernel it uses __old_kernel_stat for stat syscall which has st_rdev/st_dev as unsigned short Add a testcase Signed-off-by: Khem Raj --- libc/sysdeps/linux/common/fstat.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) (limited to 'libc/sysdeps/linux/common/fstat.c') diff --git a/libc/sysdeps/linux/common/fstat.c b/libc/sysdeps/linux/common/fstat.c index acc639bce..4726a6879 100644 --- a/libc/sysdeps/linux/common/fstat.c +++ b/libc/sysdeps/linux/common/fstat.c @@ -12,18 +12,28 @@ #include #include "xstatconv.h" -#define __NR___syscall_fstat __NR_fstat -static __inline__ _syscall2(int, __syscall_fstat, int, fd, struct kernel_stat *, buf) - int fstat(int fd, struct stat *buf) { int result; +#ifdef __NR_fstat64 + /* normal stat call has limited values for various stat elements + * e.g. uid device major/minor etc. + * so we use 64 variant if available + * in order to get newer versions of stat elements + */ + struct kernel_stat64 kbuf; + result = INLINE_SYSCALL(fstat64, 2, fd, &kbuf); + if (result == 0) { + __xstat32_conv(&kbuf, buf); + } +#else struct kernel_stat kbuf; - result = __syscall_fstat(fd, &kbuf); + result = INLINE_SYSCALL(fstat, 2, fd, &kbuf); if (result == 0) { __xstat_conv(&kbuf, buf); } +#endif return result; } libc_hidden_def(fstat) -- cgit v1.2.3