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authorAnthony G. Basile <blueness@gentoo.org>2013-07-28 13:08:34 (GMT)
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2013-08-02 12:04:17 (GMT)
commitf22cca4722fa66e424562e69f4afa2bca0af871d (patch)
treeb14cbeb2e74a714202bd7f8796cd7e14c3f34982 /libc/misc
parentf2a8f24fbaec0b242d9ef3fa3347efc263f92ee2 (diff)
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 <blueness@gentoo.org> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/misc')
-rw-r--r--libc/misc/file/isfdtype.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/libc/misc/file/isfdtype.c b/libc/misc/file/isfdtype.c
new file mode 100644
index 0000000..4d9199b
--- /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
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#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;
+}