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

   1 /* -*-c-*-
   2  *
   3  * $Id: xtell.c,v 1.2 1998/11/21 22:30:25 mdw Exp $
   4  *
   5  * Wake up a waiting xwait process
   6  *
   7  * (c) 1998 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the Edgeware X tools collection.
  13  *
  14  * X tools is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * X tools is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with X tools; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: xtell.c,v $
  32  * Revision 1.2  1998/11/21 22:30:25  mdw
  33  * Support GNU-style long options throughout, and introduce proper help
  34  * text to all programs.  Update manual pages to match.
  35  *
  36  * Revision 1.1  1998/11/16 23:00:49  mdw
  37  * Initial versions.
  38  *
  39  */
  40
  41 /*----- Header files ------------------------------------------------------*/
  42
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46
  47 #include <X11/Xlib.h>
  48 #include <X11/Xutil.h>
  49
  50 #include "mdwopt.h"
  51 #include "quis.h"
  52 #include "xwait.h"
  53
  54 /*----- Main code ---------------------------------------------------------*/
  55
  56 static void version(FILE *fp)
  57 {
  58   fprintf(fp, "%s (xtoys version " VERSION ")\n", QUIS);
  59 }
  60
  61 static void usage(FILE *fp)
  62 {
  63   fprintf(fp, "Usage: %s [-d DISPLAY] [-a ATOM] [-m MSG]\n", QUIS);
  64 }
  65
  66 int main(int argc, char *argv[])
  67 {
  68   char *display = 0;
  69   Display *dpy;
  70   Atom xwait_die;
  71   char *atom = XWAIT_DIE;
  72   char *msg = XWAIT_DIE_MSG;
  73
  74   /* --- Parse options --- */
  75
  76   ego(argv[0]);
  77
  78   for (;;) {
  79     static struct option opt[] = {
  80       { "help",         0,                      0,      'h' },
  81       { "usage",        0,                      0,      'u' },
  82       { "version",      0,                      0,      'v' },
  83       { "display",      required_argument,      0,      'd' },
  84       { "atom",         required_argument,      0,      'a' },
  85       { "msg",          required_argument,      0,      'm' },
  86       { 0,              0,                      0,      0 }
  87     };
  88
  89     int i = getopt_long(argc, argv, "d:a:m:", opt, 0);
  90     if (i < 0)
  91       break;
  92     switch (i) {
  93       case 'h':
  94         version(stdout);
  95         fputs("\n", stdout);
  96         usage(stdout);
  97         fputs(
  98 "\n"
  99 "Signals a waiting `xwait' process.  Specifically, writes a property\n"
 100 "named ATOM to the X root window, with value MSG.\n"
 101 "\n"
 102 "Options:\n"
 103 "\n"
 104 "-h, --help             Display this help text\n"
 105 "-u, --usage            Display a short usage summary\n"
 106 "-v, --version          Display the program's version number\n"
 107 "\n"
 108 "-d, --display=DISPLAY  Choose X display to connect to\n"
 109 "-a, --atom=ATOM                Choose property name to set\n"
 110 "-m, --msg=MSG          Choose value of property to set\n",
 111           stdout);
 112         exit(0);
 113         break;
 114       case 'u':
 115         usage(stdout);
 116         exit(0);
 117         break;
 118       case 'v':
 119         version(stdout);
 120         exit(0);
 121         break;
 122
 123       case 'd':
 124         display = optarg;
 125         break;
 126       case 'a':
 127         atom = optarg;
 128         break;
 129       case 'm':
 130         msg = optarg;
 131         break;
 132       default:
 133         fprintf(stderr, "Usage: xtell [-d DISPLAY] [-a ATOM] [-m MSG]\n");
 134         exit(EXIT_FAILURE);
 135         break;
 136     }
 137   }
 138
 139   /* --- Connect to the display --- */
 140
 141   dpy = XOpenDisplay(display);
 142   if (!dpy) {
 143     fprintf(stderr, "xtell: couldn't open display\n");
 144     exit(EXIT_FAILURE);
 145   }
 146
 147   /* --- Find the right atom --- */
 148
 149   xwait_die = XInternAtom(dpy, atom, False);
 150
 151   /* --- Set the property value --- */
 152
 153   {
 154     XTextProperty prop;
 155     if (!XGetTextProperty(dpy, DefaultRootWindow(dpy), &prop, xwait_die)) {
 156       fprintf(stderr, "xtell: no xwait listening for `%s'\n", atom);
 157       exit(EXIT_FAILURE);
 158     }
 159     XStringListToTextProperty(&msg, 1, &prop);
 160     XSetTextProperty(dpy, DefaultRootWindow(dpy), &prop, xwait_die);
 161   }
 162
 163   /* --- Done --- */
 164
 165   XCloseDisplay(dpy);
 166   return (0);
 167 }
 168
 169 /*----- That's all, folks -------------------------------------------------*/