Improve hacky XLib code
This commit is contained in:
parent
bae3b95b6c
commit
86ed0f7989
@ -1,5 +1,5 @@
|
||||
get-x-slave-devnodes: get-x-slave-devnodes.c
|
||||
$(CC) -O2 --std=c99 -pedantic -Wall get-x-slave-devnodes.c -o get-x-slave-devnodes -lX11 -lXi
|
||||
$(CC) -O2 --std=gnu99 -pedantic -Wall get-x-slave-devnodes.c -o get-x-slave-devnodes -lX11 -lXi
|
||||
clean:
|
||||
rm -f get-x-slave-devnodes
|
||||
|
||||
|
||||
@ -6,6 +6,8 @@
|
||||
* https://github.com/anko/xkbcat
|
||||
*/
|
||||
|
||||
#define _GNU_SOURCE
|
||||
|
||||
#include <string.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
@ -28,7 +30,7 @@ char* get_property_xi2(Display* dpy, int deviceid, Atom property, const char* pr
|
||||
char* ret = NULL;
|
||||
|
||||
name = XGetAtomName(dpy, property);
|
||||
int interested_in_property = (strcmp(name, property_name) == 0);
|
||||
bool interested_in_property = (strcmp(name, property_name) == 0);
|
||||
XFree(name);
|
||||
if (!interested_in_property)
|
||||
return ret;
|
||||
@ -51,22 +53,18 @@ char* get_property_xi2(Display* dpy, int deviceid, Atom property, const char* pr
|
||||
}
|
||||
|
||||
int len = strlen((char*)ptr);
|
||||
ret = (char*)malloc(len+1);
|
||||
strcpy(ret, (const char*)ptr);
|
||||
ret = strdup((const char*)ptr);
|
||||
|
||||
j += len; /* The loop's j++ jumps over the
|
||||
terminating 0 */
|
||||
ptr += len; /* ptr += size below jumps over
|
||||
the terminating 0 */
|
||||
j += len; // The loop's j++ jumps over the terminating 0
|
||||
ptr += len; // ptr += size below jumps over the terminating 0
|
||||
break;
|
||||
|
||||
default:
|
||||
// Unknown type
|
||||
done = True;
|
||||
break;
|
||||
}
|
||||
|
||||
ptr += act_format/8;
|
||||
|
||||
if (done == True)
|
||||
break;
|
||||
}
|
||||
@ -75,65 +73,145 @@ char* get_property_xi2(Display* dpy, int deviceid, Atom property, const char* pr
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
void assert_xinput2(Display* disp)
|
||||
int is_xinput2_available(Display* disp)
|
||||
{
|
||||
int xiOpcode;
|
||||
{ // Test for XInput 2 extension
|
||||
int queryEvent, queryError;
|
||||
if (! XQueryExtension(disp, "XInputExtension", &xiOpcode, &queryEvent, &queryError))
|
||||
{
|
||||
fprintf(stderr, "X Input extension not available\n");
|
||||
exit(2);
|
||||
}
|
||||
int queryEvent, queryError;
|
||||
if (! XQueryExtension(disp, "XInputExtension", &xiOpcode, &queryEvent, &queryError))
|
||||
{
|
||||
fprintf(stderr, "XInput extension not available\n");
|
||||
return -1;
|
||||
}
|
||||
{ // Request XInput 2.0, to guard against changes in future versions
|
||||
int major = 2, minor = 0;
|
||||
int queryResult = XIQueryVersion(disp, &major, &minor);
|
||||
if (queryResult == BadRequest)
|
||||
{
|
||||
fprintf(stderr, "Need XI 2.0 support (got %d.%d)\n", major, minor);
|
||||
exit(3);
|
||||
}
|
||||
else if (queryResult != Success)
|
||||
{
|
||||
fprintf(stderr, "XIQueryVersion failed!\n");
|
||||
exit(4);
|
||||
}
|
||||
|
||||
int major = 2, minor = 0;
|
||||
int queryResult = XIQueryVersion(disp, &major, &minor);
|
||||
if (queryResult == BadRequest)
|
||||
{
|
||||
fprintf(stderr, "XInput 2.0 support required (got %d.%d)\n", major, minor);
|
||||
return -2;
|
||||
}
|
||||
else if (queryResult != Success)
|
||||
{
|
||||
fprintf(stderr, "XIQueryVersion failed\n");
|
||||
return -3;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
typedef struct SlaveInfo
|
||||
{
|
||||
char* slave_names;
|
||||
char* dev_nodes;
|
||||
} SlaveInfo;
|
||||
|
||||
SlaveInfo new_slave_info()
|
||||
{
|
||||
SlaveInfo si;
|
||||
si.slave_names = NULL;
|
||||
si.dev_nodes = NULL;
|
||||
return si;
|
||||
}
|
||||
|
||||
void free_slave_info(SlaveInfo si)
|
||||
{
|
||||
free(si.slave_names);
|
||||
free(si.dev_nodes);
|
||||
si.slave_names = NULL;
|
||||
si.dev_nodes = NULL;
|
||||
}
|
||||
|
||||
bool is_empty_slave_info(SlaveInfo si)
|
||||
{
|
||||
return (si.slave_names == NULL || si.dev_nodes == NULL);
|
||||
}
|
||||
|
||||
void replace(char* str, char old, char new)
|
||||
{
|
||||
int i = 0;
|
||||
while (str[i] != '\0')
|
||||
{
|
||||
if (str[i] == old)
|
||||
str[i] = new;
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void print_device_nodes(Display* disp)
|
||||
int append_as_line(char** dst, char* line)
|
||||
{
|
||||
XIDeviceInfo* all_slaves;
|
||||
XIDeviceInfo* current_slave;
|
||||
int num_slaves;
|
||||
uint len_newstr = strlen(line) + 2;
|
||||
if (*dst != NULL)
|
||||
len_newstr += strlen(*dst);
|
||||
|
||||
char* newstr = (char*)malloc(len_newstr);
|
||||
if (newstr == NULL)
|
||||
return -1;
|
||||
|
||||
newstr[0] = '\0';
|
||||
replace(line, '\n', ' ');
|
||||
if (*dst != NULL)
|
||||
strcat(newstr, *dst);
|
||||
strcat(newstr, line);
|
||||
strcat(newstr, "\n");
|
||||
|
||||
free(*dst);
|
||||
*dst = newstr;
|
||||
return 0;
|
||||
}
|
||||
|
||||
SlaveInfo get_slave_info(Display* disp)
|
||||
{
|
||||
int num_slaves;
|
||||
XIDeviceInfo* all_slaves = XIQueryDevice(disp, XIAllDevices, &num_slaves);
|
||||
SlaveInfo slaveinfo = new_slave_info();
|
||||
bool fail = false;
|
||||
|
||||
all_slaves = XIQueryDevice(disp, XIAllDevices, &num_slaves);
|
||||
for (int i = 0; i < num_slaves; i++)
|
||||
{
|
||||
current_slave = &all_slaves[i];
|
||||
|
||||
XIDeviceInfo* current_slave = &all_slaves[i];
|
||||
int nprops;
|
||||
Atom* props;
|
||||
props = XIListProperties(disp, current_slave->deviceid, &nprops);
|
||||
if (!nprops)
|
||||
printf("Device '%s' does not report any properties.\n", current_slave->name);
|
||||
Atom* props = XIListProperties(disp, current_slave->deviceid, &nprops);
|
||||
|
||||
while(nprops--)
|
||||
while(nprops-- && !fail)
|
||||
{
|
||||
char* property = get_property_xi2(disp, current_slave->deviceid, props[nprops], "Device Node");
|
||||
if (property != NULL)
|
||||
char* devnode = get_property_xi2(disp, current_slave->deviceid, props[nprops], "Device Node");
|
||||
if (current_slave->name != NULL && devnode != NULL)
|
||||
{
|
||||
printf("%s=%s\n", current_slave->name, property);
|
||||
free(property);
|
||||
int append_slave_success = append_as_line(&slaveinfo.slave_names, current_slave->name);
|
||||
int append_devnode_success = append_as_line(&slaveinfo.dev_nodes, devnode);
|
||||
if (append_slave_success != 0 || append_devnode_success != 0)
|
||||
fail = true;
|
||||
}
|
||||
free(devnode);
|
||||
}
|
||||
XFree(props);
|
||||
}
|
||||
if (fail)
|
||||
{
|
||||
free_slave_info(slaveinfo);
|
||||
break;
|
||||
}
|
||||
|
||||
}
|
||||
XIFreeDeviceInfo(all_slaves);
|
||||
return slaveinfo;
|
||||
}
|
||||
|
||||
Display* connect_to_x(const char* xDisplayName)
|
||||
{
|
||||
Display* disp = XOpenDisplay(xDisplayName);
|
||||
if (NULL == disp)
|
||||
{
|
||||
fprintf(stderr, "Cannot open X display '%s'\n", xDisplayName);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (is_xinput2_available(disp) != 0)
|
||||
{
|
||||
XCloseDisplay(disp);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return disp;
|
||||
}
|
||||
|
||||
|
||||
@ -142,19 +220,22 @@ int main(int argc, char * argv[])
|
||||
char* xDisplayName = getenv("DISPLAY");
|
||||
if (xDisplayName == NULL)
|
||||
{
|
||||
printf("DISPLAY environment variable not found\n");
|
||||
fprintf(stderr, "DISPLAY environment variable not found\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
// Connect to X display
|
||||
Display* disp = XOpenDisplay(xDisplayName);
|
||||
if (NULL == disp)
|
||||
Display* disp = connect_to_x(xDisplayName);
|
||||
if (disp == NULL)
|
||||
exit(1);
|
||||
|
||||
SlaveInfo si = get_slave_info(disp);
|
||||
if (!is_empty_slave_info(si))
|
||||
{
|
||||
fprintf(stderr, "Cannot open X display '%s'\n", xDisplayName);
|
||||
exit(1);
|
||||
printf("%s", si.slave_names);
|
||||
printf("%s", si.dev_nodes);
|
||||
}
|
||||
assert_xinput2(disp);
|
||||
|
||||
print_device_nodes(disp);
|
||||
free_slave_info(si);
|
||||
XCloseDisplay(disp);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user