util/wxcopy.c

   1 /* wxcopy.c- copy stdin or file into cutbuffer
   2  *
   3  *  Copyright (c) 1997-2003 Alfredo K. Kojima
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <errno.h>
  25 #include <X11/Xlib.h>
  26 #include <X11/Xatom.h>
  27
  28 #include "../src/wconfig.h"
  29
  30 #define LINESIZE        (4*1024)
  31 #define MAXDATA         (64*1024)
  32
  33 extern char *__progname;
  34
  35 void print_help()
  36 {
  37         printf("Usage: %s [OPTIONS] [FILE]\n", __progname);
  38         puts("Copies data from FILE or stdin into X cut buffer.");
  39         puts("");
  40         puts("  -display <display>              display to use");
  41         puts("  --cutbuffer <number>            cutbuffer number to put data");
  42         puts("  --no-limit                      do not limit size of input data");
  43         puts("  --clear-selection               clears the current PRIMARY selection");
  44         puts("  -h, --help                      display this help and exit");
  45         puts("  -v, --version                   output version information and exit");
  46 }
  47
  48 static int errorHandler(Display * dpy, XErrorEvent * err)
  49 {
  50         /* ignore all errors */
  51         return 0;
  52 }
  53
  54 int main(int argc, char **argv)
  55 {
  56         Display *dpy;
  57         int i;
  58         int buffer = -1;
  59         char *filename = NULL;
  60         FILE *file = stdin;
  61         char *buf = NULL;
  62         char *display_name = "";
  63         int l = 0;
  64         int buf_len = 0;
  65         int limit_check = 1;
  66         int clear_selection = 0;
  67
  68         for (i = 1; i < argc; i++) {
  69                 if (argv[i][0] == '-') {
  70                         if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
  71                                 print_help();
  72                                 exit(0);
  73                         } else if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--version") == 0) {
  74                                 printf("%s (Window Maker %s)\n", __progname, VERSION);
  75                                 exit(0);
  76                         } else if (strcmp(argv[i], "-cutbuffer") == 0 || strcmp(argv[i], "--cutbuffer") == 0) {
  77                                 if (i < argc - 1) {
  78                                         i++;
  79                                         if (sscanf(argv[i], "%i", &buffer) != 1) {
  80                                                 fprintf(stderr, "%s: could not convert '%s' to int\n",
  81                                                         __progname, argv[i]);
  82                                                 exit(1);
  83                                         }
  84                                         if (buffer < 0 || buffer > 7) {
  85                                                 fprintf(stderr, "%s: invalid buffer number %i\n", __progname, buffer);
  86                                                 exit(1);
  87                                         }
  88                                 } else {
  89                                         printf("%s: missing argument for '%s'\n", __progname, argv[i]);
  90                                         printf("Try '%s --help' for more information\n", __progname);
  91                                         exit(1);
  92                                 }
  93                         } else if (strcmp(argv[i], "-display") == 0) {
  94                                 if (i < argc - 1) {
  95                                         display_name = argv[++i];
  96                                 } else {
  97                                         printf("%s: missing argument for '%s'\n", __progname, argv[i]);
  98                                         printf("Try '%s --help' for more information\n", __progname);
  99                                         exit(1);
 100                                 }
 101                         } else if (strcmp(argv[i], "-clearselection") == 0
 102                                    || strcmp(argv[i], "--clear-selection") == 0) {
 103                                 clear_selection = 1;
 104                         } else if (strcmp(argv[i], "-nolimit") == 0 || strcmp(argv[i], "--no-limit") == 0) {
 105                                 limit_check = 0;
 106                         } else {
 107                                 printf("%s: invalid argument '%s'\n", __progname, argv[i]);
 108                                 printf("Try '%s --help' for more information\n", __progname);
 109                                 exit(1);
 110                         }
 111                 } else {
 112                         filename = argv[i];
 113                 }
 114         }
 115         if (filename) {
 116                 file = fopen(filename, "rb");
 117                 if (!file) {
 118                         char line[1024];
 119                         sprintf(line, "%s: could not open \"%s\"", __progname, filename);
 120                         perror(line);
 121                         exit(1);
 122                 }
 123         }
 124
 125         dpy = XOpenDisplay(display_name);
 126         XSetErrorHandler(errorHandler);
 127         if (!dpy) {
 128                 fprintf(stderr, "%s: could not open display \"%s\"\n", __progname, XDisplayName(display_name));
 129                 exit(1);
 130         }
 131
 132         if (buffer < 0) {
 133                 Atom *rootWinProps;
 134                 int exists[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 135                 int i, count;
 136
 137                 /* Create missing CUT_BUFFERs */
 138                 rootWinProps = XListProperties(dpy, DefaultRootWindow(dpy), &count);
 139                 for (i = 0; i < count; i++) {
 140                         switch (rootWinProps[i]) {
 141                         case XA_CUT_BUFFER0:
 142                                 exists[0] = 1;
 143                                 break;
 144                         case XA_CUT_BUFFER1:
 145                                 exists[1] = 1;
 146                                 break;
 147                         case XA_CUT_BUFFER2:
 148                                 exists[2] = 1;
 149                                 break;
 150                         case XA_CUT_BUFFER3:
 151                                 exists[3] = 1;
 152                                 break;
 153                         case XA_CUT_BUFFER4:
 154                                 exists[4] = 1;
 155                                 break;
 156                         case XA_CUT_BUFFER5:
 157                                 exists[5] = 1;
 158                                 break;
 159                         case XA_CUT_BUFFER6:
 160                                 exists[6] = 1;
 161                                 break;
 162                         case XA_CUT_BUFFER7:
 163                                 exists[7] = 1;
 164                                 break;
 165                         default:
 166                                 break;
 167                         }
 168                 }
 169                 if (rootWinProps) {
 170                         XFree(rootWinProps);
 171                 }
 172                 for (i = 0; i < 8; i++) {
 173                         if (!exists[i]) {
 174                                 XStoreBuffer(dpy, "", 0, i);
 175                         }
 176                 }
 177
 178                 XRotateBuffers(dpy, 1);
 179                 buffer = 0;
 180         }
 181
 182         while (!feof(file)) {
 183                 char *nbuf;
 184                 char tmp[LINESIZE + 2];
 185                 int nl = 0;
 186
 187                 /*
 188                  * Use read() instead of fgets() to preserve NULLs, since
 189                  * especially since there's no reason to read one line at a time.
 190                  */
 191                 if ((nl = fread(tmp, 1, LINESIZE, file)) <= 0) {
 192                         break;
 193                 }
 194                 if (buf_len == 0) {
 195                         nbuf = malloc(buf_len = l + nl + 1);
 196                 } else if (buf_len < l + nl + 1) {
 197                         /*
 198                          * To avoid terrible performance on big input buffers,
 199                          * grow by doubling, not by the minimum needed for the
 200                          * current line.
 201                          */
 202                         buf_len = 2 * buf_len + nl + 1;
 203                         /* some realloc implementations don't do malloc if buf==NULL */
 204                         if (buf == NULL) {
 205                                 nbuf = malloc(buf_len);
 206                         } else {
 207                                 nbuf = realloc(buf, buf_len);
 208                         }
 209                 } else {
 210                         nbuf = buf;
 211                 }
 212                 if (!nbuf) {
 213                         fprintf(stderr, "%s: out of memory\n", __progname);
 214                         exit(1);
 215                 }
 216                 buf = nbuf;
 217                 /*
 218                  * Don't strcat, since it would make the algorithm n-squared.
 219                  * Don't use strcpy, since it stops on a NUL.
 220                  */
 221                 memcpy(buf + l, tmp, nl);
 222                 l += nl;
 223                 if (limit_check && l >= MAXDATA) {
 224                         fprintf
 225                             (stderr,
 226                              "%s: too much data in input - more than %d bytes\n"
 227                              "  use the -nolimit argument to remove the limit check.\n", __progname, MAXDATA);
 228                         exit(1);
 229                 }
 230         }
 231
 232         if (clear_selection) {
 233                 XSetSelectionOwner(dpy, XA_PRIMARY, None, CurrentTime);
 234         }
 235         if (buf) {
 236                 XStoreBuffer(dpy, buf, l, buffer);
 237         }
 238         XFlush(dpy);
 239         XCloseDisplay(dpy);
 240         exit(buf == NULL || errno != 0);
 241 }