Add _SC_PAGE_SIZE sysconf().

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24850 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/unistd.h

@@ -59,6 +59,8 @@
 #define _SC_VERSION				24
 #define _SC_GETGR_R_SIZE_MAX	25
 #define _SC_GETPW_R_SIZE_MAX	26
+#define _SC_PAGE_SIZE			27
+#define _SC_PAGESIZE			_SC_PAGE_SIZE
 
 /* lseek() constants */
 #ifndef SEEK_SET

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

@@ -58,6 +58,8 @@ sysconf(int name)
 			return MAX_GROUP_BUFFER_SIZE;
 		case _SC_GETPW_R_SIZE_MAX:
 			return MAX_PASSWD_BUFFER_SIZE;
+		case _SC_PAGE_SIZE:
+			return B_PAGE_SIZE;
 	}
 
 	return -1;