1 /* vdagentd.c vdagentd xorg.conf writing code
3 Copyright 2011, 2012 Red Hat, Inc.
6 Hans de Goede <hdegoede@redhat.com>
8 This program is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include <pciaccess.h>
33 #include "vdagentd-xorg-conf.h"
35 #define FPRINTF(...) \
37 r = fprintf(f, __VA_ARGS__); \
39 syslog(LOG_ERR, "Error writing to %s: %m", xorg_conf); \
41 pci_system_cleanup(); \
46 void vdagentd_write_xorg_conf(VDAgentMonitorsConfig *monitor_conf)
49 int i, r, count, min_x = INT_MAX, min_y = INT_MAX;
51 struct pci_device_iterator *it;
52 struct pci_device *dev;
53 const struct pci_id_match qxl_id_match = {
56 .subvendor_id = PCI_MATCH_ANY,
57 .subdevice_id = PCI_MATCH_ANY,
59 const char *xorg_conf = "/opt/var/run/spice-vdagentd/xorg.conf.spice";
60 const char *xorg_conf_old = "/opt/var/run/spice-vdagentd/xorg.conf.spice.old";
62 r = rename(xorg_conf, xorg_conf_old);
63 if (r && errno != ENOENT) {
65 "Error renaming %s to %s: %m, not generating xorg.conf",
66 xorg_conf, xorg_conf_old);
70 r = pci_system_init();
72 syslog(LOG_ERR, "Error initializing libpciaccess: %d, not generating xorg.conf", r);
76 it = pci_id_match_iterator_create(&qxl_id_match);
78 syslog(LOG_ERR, "Error could not create pci id iterator for QXL devices, not generating xorg.conf");
83 dev = pci_device_next(it);
85 syslog(LOG_ERR, "No QXL devices found, not generating xorg.conf");
90 f = fopen(xorg_conf, "w");
92 syslog(LOG_ERR, "Error opening %s for writing: %m", xorg_conf);
97 FPRINTF("# xorg.conf generated by spice-vdagentd\n");
98 FPRINTF("# generated from monitor info provided by the client\n\n");
100 if (monitor_conf->num_of_monitors == 1) {
101 FPRINTF("# Client has only 1 monitor\n");
102 FPRINTF("# This works best with no xorg.conf, leaving xorg.conf empty\n");
104 pci_system_cleanup();
108 FPRINTF("Section \"ServerFlags\"\n");
109 FPRINTF("\tOption\t\t\"Xinerama\"\t\"true\"\n");
110 FPRINTF("EndSection\n\n");
114 FPRINTF("Section \"Device\"\n");
115 FPRINTF("\tIdentifier\t\"qxl%d\"\n", i++);
116 FPRINTF("\tDriver\t\t\"qxl\"\n");
117 FPRINTF("\tBusID\t\t\"PCI:%02d:%02d:%d\"\n",
118 dev->bus, dev->dev, dev->func);
119 FPRINTF("\tOption\t\t\"NumHeads\"\t\"1\"\n");
120 FPRINTF("EndSection\n\n");
121 } while ((dev = pci_device_next(it)));
123 if (i < monitor_conf->num_of_monitors) {
124 FPRINTF("# Client has %d monitors, but only %d qxl devices found\n",
125 monitor_conf->num_of_monitors, i);
126 FPRINTF("# Only generation %d \"Screen\" sections\n\n", i);
129 count = monitor_conf->num_of_monitors;
132 for (i = 0; i < count; i++) {
133 FPRINTF("Section \"Screen\"\n");
134 FPRINTF("\tIdentifier\t\"Screen%d\"\n", i);
135 FPRINTF("\tDevice\t\t\"qxl%d\"\n", i);
136 FPRINTF("\tDefaultDepth\t24\n");
137 FPRINTF("\tSubSection \"Display\"\n");
138 FPRINTF("\t\tViewport\t0 0\n");
139 FPRINTF("\t\tDepth\t\t24\n");
140 FPRINTF("\t\tModes\t\t\"%dx%d\"\n", monitor_conf->monitors[i].width,
141 monitor_conf->monitors[i].height);
142 FPRINTF("\tEndSubSection\n");
143 FPRINTF("EndSection\n\n");
146 /* monitor_conf may contain negative values, convert these to 0 - # */
147 for (i = 0; i < count; i++) {
148 if (monitor_conf->monitors[i].x < min_x) {
149 min_x = monitor_conf->monitors[i].x;
151 if (monitor_conf->monitors[i].y < min_y) {
152 min_y = monitor_conf->monitors[i].y;
156 FPRINTF("Section \"ServerLayout\"\n");
157 FPRINTF("\tIdentifier\t\"layout\"\n");
158 for (i = 0; i < count; i++) {
159 FPRINTF("\tScreen\t\t\"Screen%d\" %d %d\n", i,
160 monitor_conf->monitors[i].x - min_x,
161 monitor_conf->monitors[i].y - min_y);
163 FPRINTF("EndSection\n");
166 pci_system_cleanup();