mdw@git.distorted.org.uk Git - xtoys/blob - xscsize.c

   1 /* -*-c-*-
   2  *
   3  * Return X display size to shell script
   4  *
   5  * (c) 1998 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of the Edgeware X tools collection.
  11  *
  12  * X tools is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * X tools is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with X tools; if not, write to the Free Software Foundation,
  24  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  25  */
  26
  27 /*----- Header files ------------------------------------------------------*/
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <X11/Xlib.h>
  34
  35 #include <mLib/mdwopt.h>
  36 #include <mLib/quis.h>
  37
  38 /*----- Main code ---------------------------------------------------------*/
  39
  40 static void version(FILE *fp)
  41   { pquis(fp, "$ (xtoys version " VERSION ")\n"); }
  42
  43 static void usage(FILE *fp)
  44   { pquis(fp, "Usage: $ [-bcx] [-d DISPLAY]\n"); }
  45
  46 static void help(FILE *fp)
  47 {
  48   version(fp);
  49   fputc('\n', fp);
  50   usage(stdout);
  51   fputs("\n\
  52 Reads the size of the X root window and outputs it in a form suitable\n\
  53 for use as a shell assignment statement, defining variables XWIDTH and\n\
  54 XHEIGHT.\n\
  55 \n\
  56 Options:\n\
  57 \n\
  58 -h, --help              Display this help text\n\
  59 -u, --usage             Display a short usage summary\n\
  60 -v, --version           Display the program's version number\n\
  61 \n\
  62 -d, --display=DISPLAY   Choose X display to connect to\n\
  63 -b, --bourne-shell      Output text suitable for a Bourne shell\n\
  64 -c, --c-shell           Output text suitable for a C shell\n\
  65 -x, --export            Export the variables into the environment\n",
  66         fp);
  67 }
  68
  69 int main(int argc, char *argv[])
  70 {
  71   Display *dpy;
  72   const char *s;
  73   const char *display = 0;
  74   unsigned f = 0;
  75   unsigned long wd, ht;
  76   int sc;
  77
  78 #define f_sh 1u
  79 #define f_csh 2u
  80 #define f_shell 3u
  81 #define f_export 4u
  82 #define f_bogus 8u
  83
  84   /* --- Parse command line options --- */
  85
  86   ego(argv[0]);
  87
  88   for (;;) {
  89     static struct option opt[] = {
  90       { "help",         0,              0,      'h' },
  91       { "usage",        0,              0,      'u' },
  92       { "version",      0,              0,      'v' },
  93       { "display",      OPTF_ARGREQ,    0,      'd' },
  94       { "bourne-shell", 0,              0,      'b' },
  95       { "c-shell",      0,              0,      'c' },
  96       { "export",       0,              0,      'x' },
  97       { 0,              0,              0,      0 }
  98     };
  99
 100     int i = getopt_long(argc, argv, "huv" "d:bcx", opt, 0);
 101     if (i < 0) break;
 102     switch (i) {
 103       case 'h': help(stdout); exit(0); break;
 104       case 'u': usage(stdout); exit(0); break;
 105       case 'v': version(stdout); exit(0); break;
 106       case 'd': display = optarg; break;
 107       case 'b': f |= f_sh; break;
 108       case 'c': f |= f_csh; break;
 109       case 'x': f |= f_export; break;
 110       default: f |= f_bogus; break;
 111     }
 112   }
 113
 114   if (optind < argc) f |= f_bogus;
 115   if (f & f_bogus) { usage(stderr); exit(EXIT_FAILURE); }
 116
 117   /* --- Sort out the shell type --- *
 118    *
 119    * If the shell name contains the string `csh' then assume it's a C shell.
 120    * Otherwise assume it's Bourne.  This seems to work in practice.
 121    */
 122
 123   if (!(f & f_shell)) {
 124     s = getenv("SHELL");
 125     if (!s)
 126       f |= f_sh;
 127     if (strstr(s, "csh"))
 128       f |= f_csh;
 129     else
 130       f |= f_sh;
 131   }
 132
 133   if ((f & f_sh) && (f & f_csh)) {
 134     fprintf(stderr, "xscsize: make your mind up about your shell type\n");
 135     exit(EXIT_FAILURE);
 136   }
 137
 138   /* --- Get the important information --- */
 139
 140   dpy = XOpenDisplay(display);
 141   if (!dpy) {
 142     fprintf(stderr, "xscsize: couldn't open display\n");
 143     exit(EXIT_FAILURE);
 144   }
 145   sc = DefaultScreen(dpy);
 146   wd = DisplayWidth(dpy, sc);
 147   ht = DisplayHeight(dpy, sc);
 148   XCloseDisplay(dpy);
 149
 150   /* --- Do the output thing --- */
 151
 152   if (f & f_sh) {
 153     printf("XWIDTH=%lu XHEIGHT=%lu", wd, ht);
 154     if (f & f_export)
 155       printf("; export XWIDTH XHEIGHT");
 156   }
 157   if (f & f_csh) {
 158     if (f & f_export)
 159       printf("setenv XWIDTH %lu; setenv XHEIGHT %lu", wd, ht);
 160     else
 161       printf("set XWIDTH=%lu XHEIGHT=%lu", wd, ht);
 162   }
 163   putchar('\n');
 164
 165   /* --- Done --- */
 166
 167   return (0);
 168 }
 169
 170 /*----- That's all, folks -------------------------------------------------*/