(Working Directory): Make getwd as deprecated in the header.

manual/filesys.texi

@@ -115,7 +115,7 @@ software.
 
 @comment unistd.h
 @comment BSD
-@deftypefun {char *} getwd (char *@var{buffer})
+@deftypefn {Deprecated Function} {char *} getwd (char *@var{buffer})
 This is similar to @code{getcwd}, but has no way to specify the size of
 the buffer.  The GNU library provides @code{getwd} only
 for backwards compatibility with BSD.
@@ -125,6 +125,21 @@ The @var{buffer} argument should be a pointer to an array at least
 system there is no limit to the size of a file name, so this is not
 necessarily enough space to contain the directory name.  That is why
 this function is deprecated.
+@end deftypefn
+
+@comment unistd.h
+@comment GNU
+@deftypefun {char *} get_current_dir_name (void)
+@vindex PWD
+This @code{get_current_dir_name} function is bascially equivalent to
+@w{@code{getcwd (NULL, 0)}}.  The only difference is that the value of
+the @code{PWD} variable is returned if this value is correct.  This is a
+subtle difference which is visible if the path described by the
+@code{PWD} value is using one or more symbol links in which case the
+value returned by @code{getcwd} can resolve the symbol links and
+therefore yield a different result.
+
+This function is a GNU extension.
 @end deftypefun
 
 @comment unistd.h
@@ -279,8 +294,8 @@ This returns the @code{st_mode} value corresponding to @var{dtype}.
 
 This structure may contain additional members in the future.  Their
 availability is always announced in the compilation environment by a
-macro names @code{_DIRENT_HAVE_D_xxx} where @code{xxx} is replaced by
-the name of the new member.  For instance, the member @code{d_reclen}
+macro names @code{_DIRENT_HAVE_D_@var{xxx}} where @var{xxx} is replaced
+by the name of the new member.  For instance, the member @code{d_reclen}
 available on some systems is announced through the macro
 @code{_DIRENT_HAVE_D_RECLEN}.
 

manual/resource.texi

@@ -1353,7 +1353,8 @@ information about the physical memory the system has.  The call
   sysconf (_SC_PHYS_PAGES)
 @end smallexample
 
-@noindent returns the total number of page of physical the system has.
+@noindent
+returns the total number of pages of physical the system has.
 This does not mean all this memory is available.  This information can
 be found using
 
@@ -1371,6 +1372,31 @@ increases its memory usage).  The value returned for
 If all applications together constantly use more than that amount of
 memory the system is in trouble.
 
+The GNU C library provides in addition to these already described way to
+get this information two functions.  They are declared in the file
+@file{sys/sysinfo.h}.  Programmers should prefer to use the
+@code{sysconf} method described above.
+
+@comment sys/sysinfo.h
+@comment GNU
+@deftypefun long int get_phys_pages (void)
+The @code{get_phys_pages} function returns the total number of pages of
+physical the system has.  To get the amount of memory this number has to
+be multiplied by the page size.
+
+This function is a GNU extension.
+@end deftypefun
+
+@comment sys/sysinfo.h
+@comment GNU
+@deftypefun long int get_avphys_pages (void)
+The @code{get_phys_pages} function returns the number of available pages of
+physical the system has.  To get the amount of memory this number has to
+be multiplied by the page size.
+
+This function is a GNU extension.
+@end deftypefun
+
 @node Processor Resources
 @section Learn about the processors available
 
@@ -1402,6 +1428,27 @@ processors and so the call
 returns the number of processors which are currently inline (i.e.,
 available).
 
+For these two pieces of information the GNU C library also provides
+functions to get the information directly.  The functions are declared
+in @file{sys/sysinfo.h}.
+
+@comment sys/sysinfo.h
+@comment GNU
+@deftypefun int get_nprocs_conf (void)
+The @code{get_nprocs_conf} function returns the number of processors the
+operating system configured.
+
+This function is a GNU extension.
+@end deftypefun
+
+@comment sys/sysinfo.h
+@comment GNU
+@deftypefun int get_nprocs (void)
+The @code{get_nprocs} function returns the number of available processors.
+
+This function is a GNU extension.
+@end deftypefun
+
 @cindex load average
 Before starting more threads it should be checked whether the processors
 are not already overused.  Unix systems calculate something called the