From f22cca4722fa66e424562e69f4afa2bca0af871d Mon Sep 17 00:00:00 2001 From: "Anthony G. Basile" Date: Sun, 28 Jul 2013 09:08:34 -0400 Subject: libc: add isfdtype() isfdtype(int fd, int fdtype) check whether a file descriptor fd is of type fdtype, where the types are defined in stat(2). It is supported in glibc and BSD, and used by utilities such as acpid. Signed-off-by: Anthony G. Basile Signed-off-by: Bernhard Reutner-Fischer --- libc/misc/file/isfdtype.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 libc/misc/file/isfdtype.c (limited to 'libc/misc') diff --git a/libc/misc/file/isfdtype.c b/libc/misc/file/isfdtype.c new file mode 100644 index 000000000..4d9199bd1 --- /dev/null +++ b/libc/misc/file/isfdtype.c @@ -0,0 +1,40 @@ +/* Determine whether descriptor has given property. + Copyright (C) 1996-2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include +#include +#include +#include +#ifdef __UCLIBC_HAS_LFS__ +# include <_lfs_64.h> +#else +# define stat64 stat +# define fstat64 fstat +#endif + +int +isfdtype (int fildes, int fdtype) +{ + struct stat64 st; + int save_error = errno; + int result = fstat64 (fildes, &st); + __set_errno (save_error); + if (result) + return result; + return (st.st_mode & S_IFMT) == (mode_t) fdtype; +} -- cgit v1.2.3