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 /*----- Static variables --------------------------------------------------*/
  39
  40 static unsigned int flags = 0;
  41 #define F_SH 1u
  42 #define F_CSH 2u
  43 #define F_SHELL 3u
  44 #define F_EXPORT 4u
  45
  46 /*----- Main code ---------------------------------------------------------*/
  47
  48 static void version(FILE *fp)
  49   { pquis(fp, "$ (xtoys version " VERSION ")\n"); }
  50
  51 static void usage(FILE *fp)
  52   { pquis(fp, "Usage: $ [-bcx] [-d DISPLAY]\n"); }
  53
  54 static void help(FILE *fp)
  55 {
  56   version(fp);
  57   fputc('\n', fp);
  58   usage(stdout);
  59   fputs("\n\
  60 Reads the size of the X root window and outputs it in a form suitable\n\
  61 for use as a shell assignment statement, defining variables XWIDTH and\n\
  62 XHEIGHT.\n\
  63 \n\
  64 Options:\n\
  65 \n\
  66 -h, --help              Display this help text\n\
  67 -u, --usage             Display a short usage summary\n\
  68 -v, --version           Display the program's version number\n\
  69 \n\
  70 -d, --display=DISPLAY   Choose X display to connect to\n\
  71 -b, --bourne-shell      Output text suitable for a Bourne shell\n\
  72 -c, --c-shell           Output text suitable for a C shell\n\
  73 -x, --export            Export the variables into the environment\n",
  74         fp);
  75 }
  76
  77 int main(int argc, char *argv[])
  78 {
  79   Display *dpy;
  80   const char *s;
  81   const char *display = 0;
  82   unsigned f = 0;
  83   unsigned long wd, ht;
  84   int sc;
  85
  86 #define f_bogus 1u
  87
  88   /* --- Parse command line options --- */
  89
  90   ego(argv[0]);
  91
  92   for (;;) {
  93     static struct option opt[] = {
  94       { "help",         0,              0,      'h' },
  95       { "usage",        0,              0,      'u' },
  96       { "version",      0,              0,      'v' },
  97       { "display",      OPTF_ARGREQ,    0,      'd' },
  98       { "bourne-shell", 0,              0,      'b' },
  99       { "c-shell",      0,              0,      'c' },
 100       { "export",       0,              0,      'x' },
 101       { 0,              0,              0,      0 }
 102     };
 103
 104     int i = getopt_long(argc, argv, "huv" "d:bcx", opt, 0);
 105     if (i < 0) break;
 106     switch (i) {
 107       case 'h': help(stdout); exit(0); break;
 108       case 'u': usage(stdout); exit(0); break;
 109       case 'v': version(stdout); exit(0); break;
 110       case 'd': display = optarg; break;
 111       case 'b': flags |= F_SH; break;
 112       case 'c': flags |= F_CSH; break;
 113       case 'x': flags |= F_EXPORT; break;
 114       default: f |= f_bogus; break;
 115     }
 116   }
 117
 118   if (optind < argc) f |= f_bogus;
 119   if (f & f_bogus) { usage(stderr); exit(EXIT_FAILURE); }
 120
 121   /* --- Sort out the shell type --- *
 122    *
 123    * If the shell name contains the string `csh' then assume it's a C shell.
 124    * Otherwise assume it's Bourne.  This seems to work in practice.
 125    */
 126
 127   if (!(flags & F_SHELL)) {
 128     s = getenv("SHELL");
 129     if (!s) flags |= F_SH;
 130     if (strstr(s, "csh")) flags |= F_CSH;
 131     else flags |= F_SH;
 132   }
 133
 134   if ((flags & F_SH) && (flags & F_CSH)) {
 135     fprintf(stderr, "xscsize: make your mind up about your shell type\n");
 136     exit(EXIT_FAILURE);
 137   }
 138
 139   /* --- Get the important information --- */
 140
 141   dpy = XOpenDisplay(display);
 142   if (!dpy) {
 143     fprintf(stderr, "xscsize: couldn't open display\n");
 144     exit(EXIT_FAILURE);
 145   }
 146   sc = DefaultScreen(dpy);
 147   wd = DisplayWidth(dpy, sc);
 148   ht = DisplayHeight(dpy, sc);
 149   XCloseDisplay(dpy);
 150
 151   /* --- Do the output thing --- */
 152
 153   if (f & f_sh) {
 154     printf("XWIDTH=%lu XHEIGHT=%lu", wd, ht);
 155     if (f & f_export)
 156       printf("; export XWIDTH XHEIGHT");
 157   }
 158   if (f & f_csh) {
 159     if (f & f_export)
 160       printf("setenv XWIDTH %lu; setenv XHEIGHT %lu", wd, ht);
 161     else
 162       printf("set XWIDTH=%lu XHEIGHT=%lu", wd, ht);
 163   }
 164   putchar('\n');
 165
 166   /* --- Done --- */
 167
 168   return (0);
 169 }
 170
 171 /*----- That's all, folks -------------------------------------------------*/