| 1 | /* $Id: command.c,v 1.1.1.2 2004-10-03 05:00:35 ghudson Exp $ */ |
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| 2 | |
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| 3 | /* Copyright (C) 1998-99 Martin Baulig |
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| 4 | This file is part of LibGTop 1.0. |
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| 5 | |
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| 6 | Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998. |
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| 7 | |
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| 8 | LibGTop is free software; you can redistribute it and/or modify it |
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| 9 | under the terms of the GNU General Public License as published by |
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| 10 | the Free Software Foundation; either version 2 of the License, |
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| 11 | or (at your option) any later version. |
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| 12 | |
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| 13 | LibGTop is distributed in the hope that it will be useful, but WITHOUT |
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| 14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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| 15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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| 16 | for more details. |
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| 17 | |
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| 18 | You should have received a copy of the GNU General Public License |
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| 19 | along with LibGTop; see the file COPYING. If not, write to the |
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| 20 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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| 21 | Boston, MA 02111-1307, USA. |
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| 22 | */ |
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| 23 | |
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| 24 | #include <glibtop/read.h> |
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| 25 | #include <glibtop/write.h> |
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| 26 | #include <glibtop/read_data.h> |
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| 27 | |
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| 28 | #include <glibtop/command.h> |
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| 29 | |
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| 30 | void * |
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| 31 | glibtop_call_l (glibtop *server, unsigned command, size_t send_size, |
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| 32 | const void *send_buf, size_t recv_size, void *recv_buf) |
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| 33 | { |
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| 34 | glibtop_command cmnd = {0}; |
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| 35 | glibtop_response response = {0}; |
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| 36 | |
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| 37 | glibtop_init_r (&server, 0, 0); |
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| 38 | |
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| 39 | cmnd.command = command; |
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| 40 | |
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| 41 | /* If send_size is less than _GLIBTOP_PARAM_SIZE (normally 16 Bytes), we |
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| 42 | * send it together with command, so we only need one system call instead |
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| 43 | * of two. */ |
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| 44 | |
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| 45 | if (send_size <= _GLIBTOP_PARAM_SIZE) { |
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| 46 | memcpy (cmnd.parameter, send_buf, send_size); |
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| 47 | cmnd.size = send_size; |
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| 48 | } else { |
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| 49 | cmnd.data_size = send_size; |
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| 50 | } |
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| 51 | |
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| 52 | glibtop_write_l (server, sizeof (glibtop_command), &cmnd); |
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| 53 | |
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| 54 | glibtop_read_l (server, sizeof (glibtop_response), &response); |
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| 55 | |
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| 56 | #ifdef DEBUG |
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| 57 | fprintf (stderr, "RESPONSE: %lu - %d\n", |
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| 58 | response.offset, response.data_size); |
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| 59 | #endif |
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| 60 | |
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| 61 | if (recv_buf) |
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| 62 | memcpy (recv_buf, ((char *) &response) + response.offset, |
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| 63 | recv_size); |
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| 64 | |
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| 65 | if (response.data_size) { |
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| 66 | void *ptr = g_malloc (response.data_size); |
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| 67 | |
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| 68 | glibtop_read_l (server, response.data_size, ptr); |
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| 69 | |
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| 70 | return ptr; |
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| 71 | } |
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| 72 | |
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| 73 | return NULL; |
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| 74 | } |
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