Add confstr(3).

libc/Makefile

@@ -164,6 +164,7 @@ chmod.o \
 chown.o \
 clock.o \
 close.o \
+confstr.o \
 $(CPUDIR)/calltrace.o \
 $(CPUDIR)/fork.o \
 $(CPUDIR)/setjmp.o \

libc/confstr.cpp

@@ -0,0 +1,40 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    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/>.
+
+    confstr.cpp
+    Get configurable string variables.
+
+*******************************************************************************/
+
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+
+extern "C" size_t confstr(int name, char* buf, size_t len)
+{
+	switch ( name )
+	{
+		(void) buf;
+		(void) len;
+	default:
+		fprintf(stderr, "%s:%u warning: %s(%i, ...) is unsupported\n",
+		        __FILE__, __LINE__, __func__, name);
+		return errno = EINVAL, 0;
+	}
+}

libc/include/unistd.h

@@ -57,7 +57,37 @@ __BEGIN_DECLS
 
 @include(NULL.h)
 
-/* TODO: _CS_* is missing here. */
+#define _CS_PATH 0
+#define _CS_POSIX_V7_ILP32_OFF32_CFLAGS 1
+#define _CS_POSIX_V7_ILP32_OFF32_LDFLAGS 2
+#define _CS_POSIX_V7_ILP32_OFF32_LIBS 3
+#define _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS 4
+#define _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS 5
+#define _CS_POSIX_V7_ILP32_OFFBIG_LIBS 6
+#define _CS_POSIX_V7_LP64_OFF64_CFLAGS 7
+#define _CS_POSIX_V7_LP64_OFF64_LDFLAGS 8
+#define _CS_POSIX_V7_LP64_OFF64_LIBS 9
+#define _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS 10
+#define _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS 11
+#define _CS_POSIX_V7_LPBIG_OFFBIG_LIBS 12
+#define _CS_POSIX_V7_THREADS_CFLAGS 13
+#define _CS_POSIX_V7_THREADS_LDFLAGS 14
+#define _CS_POSIX_V7_WIDTH_RESTRICTED_ENVS 15
+#define _CS_V7_ENV 16
+#define _CS_POSIX_V6_ILP32_OFF32_CFLAGS 17 /* obsolescent */
+#define _CS_POSIX_V6_ILP32_OFF32_LDFLAGS 18 /* obsolescent */
+#define _CS_POSIX_V6_ILP32_OFF32_LIBS 19 /* obsolescent */
+#define _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS 20 /* obsolescent */
+#define _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS 21 /* obsolescent */
+#define _CS_POSIX_V6_ILP32_OFFBIG_LIBS 22 /* obsolescent */
+#define _CS_POSIX_V6_LP64_OFF64_CFLAGS 23 /* obsolescent */
+#define _CS_POSIX_V6_LP64_OFF64_LDFLAGS 24 /* obsolescent */
+#define _CS_POSIX_V6_LP64_OFF64_LIBS 25 /* obsolescent */
+#define _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS 26 /* obsolescent */
+#define _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS 27 /* obsolescent */
+#define _CS_POSIX_V6_LPBIG_OFFBIG_LIBS 28 /* obsolescent */
+#define _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS 29 /* obsolescent */
+#define _CS_V6_ENV 30 /* obsolescent */
 
 /* TODO: F_* is missing here. */
 
@@ -230,7 +260,6 @@ extern char** environ;
 /* TODO: These are not implemented in sortix libc yet. */
 #if defined(__SORTIX_SHOW_UNIMPLEMENTED)
 unsigned alarm(unsigned);
-size_t confstr(int, char*, size_t);
 char* crypt(const char*, const char*);
 char* ctermid(char*);
 void encrypt(char [64], int);
@@ -270,6 +299,7 @@ int access(const char*, int);
 int chdir(const char*);
 int chown(const char*, uid_t, gid_t);
 int close(int);
+size_t confstr(int, char*, size_t);
 int dup2(int, int);
 int dup(int);
 void _exit(int)  __attribute__ ((noreturn));