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Importing FreeBSD port of libgtop from Josh Sled.

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This commit is contained in:
Martin Baulig
1998-08-06 23:34:50 +00:00
parent 864867aeeb
commit 79f5a9c667
20 changed files with 554 additions and 244 deletions
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130
sysdeps/freebsd/open.c
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@@ -2,7 +2,7 @@
/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the Gnome Top Library.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
Contributed by Joshua Sled <jsled@xcf.berkeley.edu>, July 1998.
The Gnome Top Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
@@ -19,126 +19,26 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <glibtop.h>
#include <glibtop/open.h>
#include <glibtop/xmalloc.h>
struct nlist _glibtop_nlist[] = {
{ "_ccpu" }, /* 0 */
{ "_cp_time" }, /* 1 */
{ "_hz" }, /* 2 */
{ "_stathz" }, /* 3 */
{ "_averunnable" }, /* 4 */
{ "_swaplist" }, /* 5 */
{ "_swdevt" }, /* 6 */
{ "_nswap" }, /* 7 */
{ "_nswdev" }, /* 8 */
{ "_dmmax" }, /* 9 */
{ "_cnt" }, /* 10 */
{ "_nextpid" }, /* 11 */
{ 0 }
};
#include <kvm.h>
#include <osreldate.h>
/* Opens pipe to gtop server. Returns 0 on success and -1 on error. */
/* !!! THIS FUNCTION RUNS SUID ROOT - CHANGE WITH CAUTION !!! */
void
glibtop_init_p (glibtop *server, const unsigned long features,
const unsigned flags)
glibtop_open (glibtop *server, const char *program_name,
const unsigned long features, const unsigned flags)
{
if (server == NULL)
glibtop_error_r (NULL, "glibtop_init_p (server == NULL)");
memset (server, 0, sizeof (glibtop));
server->name = program_name;
server->os_version_code = __FreeBSD_version;
/* Setup machine-specific data */
server->machine.kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm_open");
if (server->machine.kd == NULL) {
/* FIXME: error */
}
glibtop_open_p (server, "glibtop", features, flags);
}
void
glibtop_open_p (glibtop *server, const char *program_name,
const unsigned long features, const unsigned flags)
{
fprintf (stderr, "DEBUG (%d): glibtop_open_p ()\n", getpid ());
/* !!! WE ARE ROOT HERE - CHANGE WITH CAUTION !!! */
server->name = program_name;
server->machine.uid = getuid ();
server->machine.euid = geteuid ();
server->machine.gid = getgid ();
server->machine.egid = getegid ();
/* initialize the kernel interface */
server->machine.kd = kvm_open (NULL, NULL, NULL, O_RDONLY, "libgtop");
if (server->machine.kd == NULL)
glibtop_error_io_r (server, "kvm_open");
/* get the list of symbols we want to access in the kernel */
server->machine.nlist_count = kvm_nlist
(server->machine.kd, _glibtop_nlist);
/* On FreeBSD, kvm_nlist () returns the number of invalid
* entries in the nlist. */
if (server->machine.nlist_count)
glibtop_error_io_r (server, "nlist");
/* Get tick frequency. */
(void) _glibtop_getkval (server, _glibtop_nlist [X_STATHZ].n_value,
(int *) &server->machine.hz,
sizeof (server->machine.hz),
_glibtop_nlist [X_STATHZ].n_name);
if (!server->machine.hz)
(void) _glibtop_getkval
(server, _glibtop_nlist [X_HZ].n_value,
(int *) &server->machine.hz,
sizeof (server->machine.hz),
_glibtop_nlist [X_STATHZ].n_name);
/* Drop priviledges. */
if (setreuid (server->machine.euid, server->machine.uid))
_exit (1);
if (setregid (server->machine.egid, server->machine.gid))
_exit (1);
/* !!! END OF SUID ROOT PART !!! */
/* Our effective uid is now those of the user invoking the server,
* so we do no longer have any priviledges. */
/* NOTE: On SunOS, we do not need to be suid root, we just need to
* be sgid kmem.
*
* The server will only use setegid() to get back it's priviledges,
* so it will fail if it is suid root and not sgid kmem. */
}
/* Used internally. Fetches value from kernel. */
int
_glibtop_getkval (void *void_server, unsigned long offset, int *ptr,
int size, char *refstr)
{
glibtop *server = (glibtop *) void_server;
fprintf (stderr, "DEBUG: kvm_read: %d - %lu - %p - %lu\n",
server->machine.kd, offset, ptr, size);
if (kvm_read (server->machine.kd, offset, ptr, size) != size)
{
if (*refstr == '!') return 0;
glibtop_error_r (server, "kvm_read(%s): %s",
refstr, strerror (errno));
}
return 1;
}