Created
March 29, 2023 15:50
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Show X Windows Display Information with easily parsable output
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| /* | |
| Show X Windows Display Information | |
| Compiling Note: | |
| Requires X11 headers | |
| gcc <options> xdispinfo.c -lX11 | |
| Usage: | |
| List X Window Displays | |
| xdispinfo -l | |
| Show X Windows screen count and size(s) | |
| xdispinfo -d <display-name> -s -c | |
| Patterned after https://stackoverflow.com/questions/11367354/obtaining-list-of-all-xorg-displays | |
| */ | |
| #include <stdio.h> | |
| #include <dirent.h> | |
| #include <string.h> | |
| #include <X11/Xlib.h> | |
| int main(int argc, char *argv[]) { | |
| char count = 0; | |
| char scrsize = 0; | |
| char list = 0; | |
| char hasdisp = 0; | |
| char *disp; | |
| for (int i = 0; i < argc; i++) { | |
| if (argv[i][0] == '-' && argv[i][1] == 's') { | |
| scrsize = 1; | |
| } | |
| if (argv[i][0] == '-' && argv[i][1] == 'c') { | |
| count = 1; | |
| } | |
| if (argv[i][0] == '-' && argv[i][1] == 'd') { | |
| i++; | |
| disp = argv[i]; | |
| hasdisp = (strlen(disp) == 0) ? 0 : 1; | |
| } | |
| if (argv[i][0] == '-' && argv[i][1] == 'l') { | |
| list = 1; | |
| } | |
| } | |
| if (list) { | |
| DIR* d = opendir("/tmp/.X11-unix"); | |
| if (d != NULL) { | |
| struct dirent *dr; | |
| while ((dr = readdir(d)) != NULL) { | |
| if (dr->d_name[0] != 'X') | |
| continue; | |
| char display_name[64] = ":"; | |
| strcat(display_name, dr->d_name + 1); | |
| printf("DisplayName\t%s\n",display_name); | |
| } | |
| } | |
| } | |
| else if (hasdisp) { | |
| Display *xDisp = XOpenDisplay(disp); | |
| printf("Display\t%s\n",disp); | |
| int scrCount = XScreenCount(xDisp); | |
| if (count) { | |
| printf("ScreenCount\t%d\n",scrCount); | |
| } | |
| if (scrsize) { | |
| for (int i = 0; i < scrCount; i++) { | |
| int xWid = XDisplayWidth(xDisp,i); | |
| int xHgt = XDisplayHeight(xDisp,i); | |
| printf("Screen%d\t%dx%d\n",i,xWid,xHgt); | |
| } | |
| } | |
| XCloseDisplay(xDisp); | |
| return 0; | |
| } | |
| else { | |
| printf("usage: xdisp <options>\n"); | |
| printf(" -d <display-name>\n"); | |
| printf(" must be format :<number>\n"); | |
| printf(" -s\n"); | |
| printf(" show screen size(s)\n"); | |
| printf(" -c\n"); | |
| printf(" show screen count\n"); | |
| return 1; | |
| } | |
| } |
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