Add fpathconf(2).

libc/Makefile

@@ -582,6 +582,7 @@ unistd/fchown.o \
 unistd/fchrootat.o \
 unistd/fchroot.o \
 unistd/fork.o \
+unistd/fpathconf.o \
 unistd/fsync.o \
 unistd/ftruncate.o \
 unistd/getcwd.o \

libc/include/unistd.h

@@ -421,7 +421,7 @@ int execv(const char*, char* const []);
 int execve(const char*, char* const [], char* const []);
 int execvp(const char*, char* const []);
 pid_t fork(void);
-/* TODO: long fpathconf(int, int); */
+long fpathconf(int, int);
 int fsync(int);
 char* getcwd(char*, size_t);
 gid_t getegid(void);

libc/unistd/fpathconf.cpp

@@ -0,0 +1,39 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix 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 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix 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 Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    unistd/fpathconf.cpp
+    Get configurable pathname variables.
+
+*******************************************************************************/
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+extern "C" long fpathconf(int fd, int name)
+{
+	switch ( name )
+	{
+	case _PC_PATH_MAX: return -1; // Unbounded
+	default:
+		fprintf(stderr, "%s:%u warning: %s(%i, %i) is unsupported\n",
+		        __FILE__, __LINE__, __func__, fd, name);
+		return errno = EINVAL, -1;
+	}
+}