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

   1 /* -*-c-*-
   2  *
   3  * $Id: xtell.c,v 1.4 1998/12/11 09:50:06 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 1.4  1998/12/11 09:50:06  mdw
  33  * Minor modifications to work with mLib and mgLib.
  34  *
  35  * Revision 1.3  1998/11/30 22:36:51  mdw
  36  * Tidy up tabbing in help texts very slightly.
  37  *
  38  * Revision 1.2  1998/11/21 22:30:25  mdw
  39  * Support GNU-style long options throughout, and introduce proper help
  40  * text to all programs.  Update manual pages to match.
  41  *
  42  * Revision 1.1  1998/11/16 23:00:49  mdw
  43  * Initial versions.
  44  *
  45  */
  46
  47 /*----- Header files ------------------------------------------------------*/
  48
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <string.h>
  52
  53 #include <X11/Xlib.h>
  54 #include <X11/Xutil.h>
  55
  56 #include <mLib/mdwopt.h>
  57 #include <mLib/quis.h>
  58
  59 #include "xwait.h"
  60
  61 /*----- Main code ---------------------------------------------------------*/
  62
  63 static void version(FILE *fp)
  64 {
  65   fprintf(fp, "%s (xtoys version " VERSION ")\n", QUIS);
  66 }
  67
  68 static void usage(FILE *fp)
  69 {
  70   fprintf(fp, "Usage: %s [-d DISPLAY] [-a ATOM] [-m MSG]\n", QUIS);
  71 }
  72
  73 int main(int argc, char *argv[])
  74 {
  75   char *display = 0;
  76   Display *dpy;
  77   Atom xwait_die;
  78   char *atom = XWAIT_DIE;
  79   char *msg = XWAIT_DIE_MSG;
  80
  81   /* --- Parse options --- */
  82
  83   ego(argv[0]);
  84
  85   for (;;) {
  86     static struct option opt[] = {
  87       { "help",         0,                      0,      'h' },
  88       { "usage",        0,                      0,      'u' },
  89       { "version",      0,                      0,      'v' },
  90       { "display",      required_argument,      0,      'd' },
  91       { "atom",         required_argument,      0,      'a' },
  92       { "msg",          required_argument,      0,      'm' },
  93       { 0,              0,                      0,      0 }
  94     };
  95
  96     int i = getopt_long(argc, argv, "d:a:m:", opt, 0);
  97     if (i < 0)
  98       break;
  99     switch (i) {
 100       case 'h':
 101         version(stdout);
 102         fputs("\n", stdout);
 103         usage(stdout);
 104         fputs(
 105 "\n"
 106 "Signals a waiting `xwait' process.  Specifically, writes a property\n"
 107 "named ATOM to the X root window, with value MSG.\n"
 108 "\n"
 109 "Options:\n"
 110 "\n"
 111 "-h, --help             Display this help text\n"
 112 "-u, --usage            Display a short usage summary\n"
 113 "-v, --version          Display the program's version number\n"
 114 "\n"
 115 "-d, --display=DISPLAY  Choose X display to connect to\n"
 116 "-a, --atom=ATOM\t      Choose property name to set\n"
 117 "-m, --msg=MSG          Choose value of property to set\n",
 118           stdout);
 119         exit(0);
 120         break;
 121       case 'u':
 122         usage(stdout);
 123         exit(0);
 124         break;
 125       case 'v':
 126         version(stdout);
 127         exit(0);
 128         break;
 129
 130       case 'd':
 131         display = optarg;
 132         break;
 133       case 'a':
 134         atom = optarg;
 135         break;
 136       case 'm':
 137         msg = optarg;
 138         break;
 139       default:
 140         fprintf(stderr, "Usage: xtell [-d DISPLAY] [-a ATOM] [-m MSG]\n");
 141         exit(EXIT_FAILURE);
 142         break;
 143     }
 144   }
 145
 146   /* --- Connect to the display --- */
 147
 148   dpy = XOpenDisplay(display);
 149   if (!dpy) {
 150     fprintf(stderr, "xtell: couldn't open display\n");
 151     exit(EXIT_FAILURE);
 152   }
 153
 154   /* --- Find the right atom --- */
 155
 156   xwait_die = XInternAtom(dpy, atom, False);
 157
 158   /* --- Set the property value --- */
 159
 160   {
 161     XTextProperty prop;
 162     if (!XGetTextProperty(dpy, DefaultRootWindow(dpy), &prop, xwait_die)) {
 163       fprintf(stderr, "xtell: no xwait listening for `%s'\n", atom);
 164       exit(EXIT_FAILURE);
 165     }
 166     XStringListToTextProperty(&msg, 1, &prop);
 167     XSetTextProperty(dpy, DefaultRootWindow(dpy), &prop, xwait_die);
 168   }
 169
 170   /* --- Done --- */
 171
 172   XCloseDisplay(dpy);
 173   return (0);
 174 }
 175
 176 /*----- That's all, folks -------------------------------------------------*/