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@node LibGTop Internals, , Reference Manual, Top
@chapter LibGTop Internals
@menu
* General Internals:: General Internals
* Sysdeps Internals:: Sysdeps Internals
@end menu
@node General Internals, Sysdeps Internals, LibGTop Internals, LibGTop Internals
@section General Internals
@menu
* glibtop:: The server structure
@end menu
@node glibtop, , General Internals, General Internals
@subsection The server structure - @code{glibtop}
@example
@cartouche
typedef struct _glibtop glibtop;
struct _glibtop
@{
unsigned flags;
unsigned method;
unsigned error_method;
#ifdef HAVE_GLIBTOP_MACHINE_H
glibtop_machine machine;
#endif
int input [2];
int output [2];
int socket;
int ncpu;
unsigned long os_version_code;
const char *name;
const char *server_command;
const char *server_host;
const char *server_user;
const char *server_rsh;
unsigned long features;
unsigned long server_port;
glibtop_sysdeps sysdeps;
glibtop_sysdeps required;
glibtop_sysdeps wanted;
pid_t pid;
@};
@end cartouche
@end example
@node Sysdeps Internals, , General Internals, LibGTop Internals
@section Sysdeps Internals
@menu
* glibtop_open_s:: Non-privileged initializations
* glibtop_close_s:: Non-privileged cleanups
@end menu
@node glibtop_open_s, glibtop_close_s, Sysdeps Internals, Sysdeps Internals
@subsection glibtop_open_s
This function is used in the non-suid sysdeps library @samp{-lgtop_sysdeps} to
initialize a server. It should do all initializations that do not need any
privileges.
@example
@cartouche
void
glibtop_open_s (glibtop *server, const char *program_name,
const unsigned long features,
const unsigned flags);
@end cartouche
@end example
@table @code
@item server
Pointer to the @code{glibtop} server structure.
@item program_name
Name of the calling program; the implementation will usually
set @samp{server->name} to this so it'll be used as the program
name in error messages.
@end table
Typically, this function will set @code{server->name}, @code{server->ncpu} and
@code{server->os_version_code} and initialize any of the @code{server->machine}
fields which do not need any privileges.
It is normally implemented in @file{open.c} in the sysdeps directory.
@node glibtop_close_s, , glibtop_open_s, Sysdeps Internals
@subsection glibtop_close_s
This function is used in the non-suid sysdeps library @samp{-lgtop_sysdeps} to
clean-up a server when it's no longer used.
It must free all resources that were allocated in @code{glibtop_open_s}.
@example
@cartouche
void
glibtop_close_s (glibtop *server);
@end cartouche
@end example
It is normally implemented in @file{close.c} in the sysdeps directory, but may
be empty.
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