sysconf(), pathconf(), and fpathconf() now at least do marginally useful things.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9053 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/libroot/posix/unistd/conf.c

@@ -1,12 +1,12 @@
 /* 
-** Copyright 2002, Axel Dörfler, [email protected]. All rights reserved.
-** Distributed under the terms of the OpenBeOS License.
+** Copyright 2002-2004, Axel Dörfler, [email protected]. All rights reserved.
+** Distributed under the terms of the Haiku License.
 */
 
 
 #include <unistd.h>
-#include <syscalls.h>
 #include <sys/resource.h>
+#include <stdio.h>
 #include <errno.h>
 
 
@@ -24,7 +24,31 @@ getdtablesize(void)
 long 
 sysconf(int name)
 {
-	// ToDo: implement sysconf()
+	// This is about what BeOS does, better POSIX conformance would be nice, though
+
+	switch (name) {
+		case _SC_ARG_MAX:
+			return ARG_MAX;
+		case _SC_CHILD_MAX:
+			return CHILD_MAX;
+		case _SC_CLK_TCK:
+			return CLK_TCK;
+		case _SC_JOB_CONTROL:
+			return 1;
+		case _SC_NGROUPS_MAX:
+			return NGROUPS_MAX;
+		case _SC_OPEN_MAX:
+			return OPEN_MAX;
+		case _SC_SAVED_IDS:
+			return 1;
+		case _SC_STREAM_MAX:
+			return STREAM_MAX;
+		case _SC_TZNAME_MAX:
+			return TZNAME_MAX;
+		case _SC_VERSION:
+			return _POSIX_VERSION;
+	}
+
 	return -1;
 }
 
@@ -32,7 +56,40 @@ sysconf(int name)
 long 
 fpathconf(int fd, int name)
 {
-	// ToDo: implement fpathconf()
+	switch (name) {
+		// ToDo: out of what stupidity have those been defined differently?
+		case _PC_CHOWN_RESTRICTED:
+		case _POSIX_CHOWN_RESTRICTED:
+			return 1;
+
+		case _PC_MAX_CANON:
+			return MAX_CANON;
+
+		case _PC_MAX_INPUT:
+			return MAX_INPUT;
+
+		case _PC_NAME_MAX:
+			return NAME_MAX;
+
+		case _PC_NO_TRUNC:
+		case _POSIX_NO_TRUNC:
+			return 0;
+
+		case _PC_PATH_MAX:
+			return PATH_MAX;
+
+		case _PC_PIPE_BUF:
+			return 4096;
+
+		case _PC_LINK_MAX:
+			return LINK_MAX;
+
+		// _PC_VDISABLE
+		// _POSIX_VDISABLE
+		// _POSIX_JOB_CONTROL
+		// _POSIX_SAVED_IDS
+	}
+
 	return -1;
 }
 
@@ -40,7 +97,6 @@ fpathconf(int fd, int name)
 long 
 pathconf(const char *path, int name)
 {
-	// ToDo: implement pathconf()
-	return -1;
+	return fpathconf(-1, name);
 }