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/* vdagentd.c vdagentd xorg.conf writing code
Copyright 2011, 2012 Red Hat, Inc.
Red Hat Authors:
Hans de Goede <hdegoede@redhat.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_PCIACCESS
#include <pciaccess.h>
#endif
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <syslog.h>
#include "vdagentd-xorg-conf.h"
#define FPRINTF(...) \
do { \
r = fprintf(f, __VA_ARGS__); \
if (r < 0) { \
syslog(LOG_ERR, "Error writing to %s: %m", xorg_conf); \
fclose(f); \
pci_system_cleanup(); \
return; \
} \
} while(0)
void vdagentd_write_xorg_conf(VDAgentMonitorsConfig *monitor_conf)
{
#ifdef HAVE_PCIACCESS
int i, r, count, min_x = INT_MAX, min_y = INT_MAX;
FILE *f;
struct pci_device_iterator *it;
struct pci_device *dev;
const struct pci_id_match qxl_id_match = {
.vendor_id = 0x1b36,
.device_id = 0x0100,
.subvendor_id = PCI_MATCH_ANY,
.subdevice_id = PCI_MATCH_ANY,
};
const char *xorg_conf = "/var/run/spice-vdagentd/xorg.conf.spice";
const char *xorg_conf_old = "/var/run/spice-vdagentd/xorg.conf.spice.old";
r = rename(xorg_conf, xorg_conf_old);
if (r && errno != ENOENT) {
syslog(LOG_ERR,
"Error renaming %s to %s: %m, not generating xorg.conf",
xorg_conf, xorg_conf_old);
return;
}
r = pci_system_init();
if (r) {
syslog(LOG_ERR, "Error initializing libpciaccess: %d, not generating xorg.conf", r);
return;
}
it = pci_id_match_iterator_create(&qxl_id_match);
if (!it) {
syslog(LOG_ERR, "Error could not create pci id iterator for QXL devices, not generating xorg.conf");
pci_system_cleanup();
return;
}
dev = pci_device_next(it);
if (!dev) {
syslog(LOG_ERR, "No QXL devices found, not generating xorg.conf");
pci_system_cleanup();
return;
}
f = fopen(xorg_conf, "w");
if (!f) {
syslog(LOG_ERR, "Error opening %s for writing: %m", xorg_conf);
pci_system_cleanup();
return;
}
FPRINTF("# xorg.conf generated by spice-vdagentd\n");
FPRINTF("# generated from monitor info provided by the client\n\n");
if (monitor_conf->num_of_monitors == 1) {
FPRINTF("# Client has only 1 monitor\n");
FPRINTF("# This works best with no xorg.conf, leaving xorg.conf empty\n");
fclose(f);
pci_system_cleanup();
return;
}
FPRINTF("Section \"ServerFlags\"\n");
FPRINTF("\tOption\t\t\"Xinerama\"\t\"true\"\n");
FPRINTF("EndSection\n\n");
i = 0;
do {
FPRINTF("Section \"Device\"\n");
FPRINTF("\tIdentifier\t\"qxl%d\"\n", i++);
FPRINTF("\tDriver\t\t\"qxl\"\n");
FPRINTF("\tBusID\t\t\"PCI:%02d:%02d:%d\"\n",
dev->bus, dev->dev, dev->func);
FPRINTF("\tOption\t\t\"NumHeads\"\t\"1\"\n");
FPRINTF("EndSection\n\n");
} while ((dev = pci_device_next(it)));
if (i < monitor_conf->num_of_monitors) {
FPRINTF("# Client has %d monitors, but only %d qxl devices found\n",
monitor_conf->num_of_monitors, i);
FPRINTF("# Only generation %d \"Screen\" sections\n\n", i);
count = i;
} else {
count = monitor_conf->num_of_monitors;
}
for (i = 0; i < count; i++) {
FPRINTF("Section \"Screen\"\n");
FPRINTF("\tIdentifier\t\"Screen%d\"\n", i);
FPRINTF("\tDevice\t\t\"qxl%d\"\n", i);
FPRINTF("\tDefaultDepth\t24\n");
FPRINTF("\tSubSection \"Display\"\n");
FPRINTF("\t\tViewport\t0 0\n");
FPRINTF("\t\tDepth\t\t24\n");
FPRINTF("\t\tModes\t\t\"%dx%d\"\n", monitor_conf->monitors[i].width,
monitor_conf->monitors[i].height);
FPRINTF("\tEndSubSection\n");
FPRINTF("EndSection\n\n");
}
/* monitor_conf may contain negative values, convert these to 0 - # */
for (i = 0; i < count; i++) {
if (monitor_conf->monitors[i].x < min_x) {
min_x = monitor_conf->monitors[i].x;
}
if (monitor_conf->monitors[i].y < min_y) {
min_y = monitor_conf->monitors[i].y;
}
}
FPRINTF("Section \"ServerLayout\"\n");
FPRINTF("\tIdentifier\t\"layout\"\n");
for (i = 0; i < count; i++) {
FPRINTF("\tScreen\t\t\"Screen%d\" %d %d\n", i,
monitor_conf->monitors[i].x - min_x,
monitor_conf->monitors[i].y - min_y);
}
FPRINTF("EndSection\n");
fclose(f);
pci_system_cleanup();
#endif
}
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