67798e0d7d
* lib/*.c: removed #if's - we now decide at runtime whether to use the server or to call the appropriate function for the sysdeps directory.
135 lines
3.7 KiB
C
135 lines
3.7 KiB
C
/* $Id$ */
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/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the Gnome Top Library.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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The Gnome Top Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The Gnome Top Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <glibtop.h>
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#include <glibtop/open.h>
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#include <glibtop/xmalloc.h>
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/* Opens pipe to gtop server. Returns 0 on success and -1 on error. */
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void
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glibtop_open (glibtop *server, const char *program_name,
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const unsigned long features, const unsigned flags)
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{
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char version [BUFSIZ], buffer [BUFSIZ];
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char *server_command, *server_rsh, *temp;
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char *server_host, *server_user;
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memset (server, 0, sizeof (glibtop));
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server->name = program_name;
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/* Try to get data from environment. */
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temp = getenv ("LIBGTOP_SERVER") ?
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getenv ("LIBGTOP_SERVER") : GTOP_SERVER;
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server_command = glibtop_malloc__r (server, strlen (temp) + 1);
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strcpy (server_command, temp);
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temp = getenv ("LIBGTOP_RSH") ?
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getenv ("LIBGTOP_RSH") : "rsh";
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server_rsh = glibtop_malloc__r (server, strlen (temp) + 1);
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strcpy (server_rsh, temp);
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/* Extract host and user information. */
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temp = strstr (server_command, ":");
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if (temp) {
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*temp = 0;
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server_host = server_command;
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server_command = temp+1;
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temp = strstr (server_host, "@");
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if (temp) {
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*temp = 0;
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server_user = server_host;
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server_host = temp+1;
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} else {
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server_user = NULL;
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}
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} else {
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server_host = NULL;
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server_user = NULL;
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}
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/* Store everything in `server'. */
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server->server_command = server_command;
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server->server_host = server_host;
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server->server_user = server_user;
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server->server_rsh = server_rsh;
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/* Get server features. */
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if (server->server_host)
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glibtop_error__r (server, _("Remote server not yet supported by library\n"));
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server->features = glibtop_server_features;
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/* Fork and exec server. */
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if (pipe (server->input) || pipe (server->output))
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glibtop_error__r (server, _("cannot make a pipe: %s\n"), strerror (errno));
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server->pid = fork ();
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if (server->pid < 0) {
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glibtop_error__r (server, _("%s: fork failed: %s\n"), strerror (errno));
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} else if (server->pid == 0) {
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close (0); close (1); /* close (2); */
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close (server->input [0]); close (server->output [1]);
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dup2 (server->input [1], 1); /* dup2 (server->input [1], 2); */
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dup2 (server->output [0], 0);
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if (server_host) {
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if (server_user) {
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execl (server->server_rsh, "gtop_server", "-l",
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server->server_user, server->server_host,
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server->server_command, NULL);
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} else {
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execl (server->server_rsh, "gtop_server",
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server->server_host, server_command, NULL);
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}
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} else {
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execl (server->server_command, "gtop_server", NULL);
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}
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_exit (2);
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}
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close (server->input [1]);
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close (server->output [0]);
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sprintf (version, "%s server %s ready.\n", PACKAGE, VERSION);
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glibtop_read__l (server, strlen (version), buffer);
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if (memcmp (version, buffer, strlen (version)))
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glibtop_error__r (server, _("server version is not %s"), VERSION);
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}
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