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., 51 Franklin St, Fifth Floor, Boston,
  18  *  MA 02110-1301, USA.
  19  */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <X11/Xlib.h>
  27 #include <X11/Xatom.h>
  28
  29 #include "../src/wconfig.h"
  30
  31 #define LINESIZE        (4*1024)
  32 #define MAXDATA         (64*1024)
  33
  34 static const char *prog_name;
  35
  36 static void print_help(void)
  37 {
  38         printf("Usage: %s [OPTIONS] [FILE]\n", prog_name);
  39         puts("Copies data from FILE or stdin into X cut buffer.");
  40         puts("");
  41         puts("  -display <display>              display to use");
  42         puts("  --cutbuffer <number>            cutbuffer number to put data");
  43         puts("  --no-limit                      do not limit size of input data");
  44         puts("  --clear-selection               clears the current PRIMARY selection");
  45         puts("  -h, --help                      display this help and exit");
  46         puts("  -v, --version                   output version information and exit");
  47 }
  48
  49 static int errorHandler(Display * dpy, XErrorEvent * err)
  50 {
  51         /* Parameter not used, but tell the compiler that it is ok */
  52         (void) dpy;
  53         (void) err;
  54
  55         /* ignore all errors */
  56         return 0;
  57 }
  58
  59 int main(int argc, char **argv)
  60 {
  61         Display *dpy;
  62         int i;
  63         int buffer = -1;
  64         char *filename = NULL;
  65         FILE *file = stdin;
  66         char *buf = NULL;
  67         char *display_name = "";
  68         int l = 0;
  69         int buf_len = 0;
  70         int limit_check = 1;
  71         int clear_selection = 0;
  72
  73         prog_name = argv[0];
  74         for (i = 1; i < argc; i++) {
  75                 if (argv[i][0] == '-') {
  76                         if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
  77                                 print_help();
  78                                 exit(0);
  79                         } else if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--version") == 0) {
  80                                 printf("%s (Window Maker %s)\n", prog_name, VERSION);
  81                                 exit(0);
  82                         } else if (strcmp(argv[i], "-cutbuffer") == 0 || strcmp(argv[i], "--cutbuffer") == 0) {
  83                                 if (i < argc - 1) {
  84                                         i++;
  85                                         if (sscanf(argv[i], "%i", &buffer) != 1) {
  86                                                 fprintf(stderr, "%s: could not convert '%s' to int\n",
  87                                                         prog_name, argv[i]);
  88                                                 exit(1);
  89                                         }
  90                                         if (buffer < 0 || buffer > 7) {
  91                                                 fprintf(stderr, "%s: invalid buffer number %i\n", prog_name, buffer);
  92                                                 exit(1);
  93                                         }
  94                                 } else {
  95                                         printf("%s: missing argument for '%s'\n", prog_name, argv[i]);
  96                                         printf("Try '%s --help' for more information\n", prog_name);
  97                                         exit(1);
  98                                 }
  99                         } else if (strcmp(argv[i], "-display") == 0) {
 100                                 if (i < argc - 1) {
 101                                         display_name = argv[++i];
 102                                 } else {
 103                                         printf("%s: missing argument for '%s'\n", prog_name, argv[i]);
 104                                         printf("Try '%s --help' for more information\n", prog_name);
 105                                         exit(1);
 106                                 }
 107                         } else if (strcmp(argv[i], "-clearselection") == 0
 108                                    || strcmp(argv[i], "--clear-selection") == 0) {
 109                                 clear_selection = 1;
 110                         } else if (strcmp(argv[i], "-nolimit") == 0 || strcmp(argv[i], "--no-limit") == 0) {
 111                                 limit_check = 0;
 112                         } else {
 113                                 printf("%s: invalid argument '%s'\n", prog_name, argv[i]);
 114                                 printf("Try '%s --help' for more information\n", prog_name);
 115                                 exit(1);
 116                         }
 117                 } else {
 118                         filename = argv[i];
 119                 }
 120         }
 121         if (filename) {
 122                 file = fopen(filename, "rb");
 123                 if (!file) {
 124                         char line[1024];
 125
 126                         snprintf(line, sizeof(line),
 127                                  "%s: could not open \"%s\"",
 128                                  prog_name, filename);
 129                         perror(line);
 130                         exit(1);
 131                 }
 132         }
 133
 134         dpy = XOpenDisplay(display_name);
 135         XSetErrorHandler(errorHandler);
 136         if (!dpy) {
 137                 fprintf(stderr, "%s: could not open display \"%s\"\n", prog_name, XDisplayName(display_name));
 138                 exit(1);
 139         }
 140
 141         if (buffer < 0) {
 142                 Atom *rootWinProps;
 143                 int exists[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
 144                 int i, count;
 145
 146                 /* Create missing CUT_BUFFERs */
 147                 rootWinProps = XListProperties(dpy, DefaultRootWindow(dpy), &count);
 148                 for (i = 0; i < count; i++) {
 149                         switch (rootWinProps[i]) {
 150                         case XA_CUT_BUFFER0:
 151                                 exists[0] = 1;
 152                                 break;
 153                         case XA_CUT_BUFFER1:
 154                                 exists[1] = 1;
 155                                 break;
 156                         case XA_CUT_BUFFER2:
 157                                 exists[2] = 1;
 158                                 break;
 159                         case XA_CUT_BUFFER3:
 160                                 exists[3] = 1;
 161                                 break;
 162                         case XA_CUT_BUFFER4:
 163                                 exists[4] = 1;
 164                                 break;
 165                         case XA_CUT_BUFFER5:
 166                                 exists[5] = 1;
 167                                 break;
 168                         case XA_CUT_BUFFER6:
 169                                 exists[6] = 1;
 170                                 break;
 171                         case XA_CUT_BUFFER7:
 172                                 exists[7] = 1;
 173                                 break;
 174                         default:
 175                                 break;
 176                         }
 177                 }
 178                 if (rootWinProps) {
 179                         XFree(rootWinProps);
 180                 }
 181                 for (i = 0; i < 8; i++) {
 182                         if (!exists[i]) {
 183                                 XStoreBuffer(dpy, "", 0, i);
 184                         }
 185                 }
 186
 187                 XRotateBuffers(dpy, 1);
 188                 buffer = 0;
 189         }
 190
 191         while (!feof(file)) {
 192                 char *nbuf;
 193                 char tmp[LINESIZE + 2];
 194                 int nl = 0;
 195
 196                 /*
 197                  * Use read() instead of fgets() to preserve NULLs, since
 198                  * especially since there's no reason to read one line at a time.
 199                  */
 200                 if ((nl = fread(tmp, 1, LINESIZE, file)) <= 0) {
 201                         break;
 202                 }
 203                 if (buf_len == 0) {
 204                         nbuf = malloc(buf_len = l + nl + 1);
 205                 } else if (buf_len < l + nl + 1) {
 206                         /*
 207                          * To avoid terrible performance on big input buffers,
 208                          * grow by doubling, not by the minimum needed for the
 209                          * current line.
 210                          */
 211                         buf_len = 2 * buf_len + nl + 1;
 212                         /* some realloc implementations don't do malloc if buf==NULL */
 213                         if (buf == NULL) {
 214                                 nbuf = malloc(buf_len);
 215                         } else {
 216                                 nbuf = realloc(buf, buf_len);
 217                         }
 218                 } else {
 219                         nbuf = buf;
 220                 }
 221                 if (!nbuf) {
 222                         fprintf(stderr, "%s: out of memory\n", prog_name);
 223                         exit(1);
 224                 }
 225                 buf = nbuf;
 226                 /*
 227                  * Don't strcat, since it would make the algorithm n-squared.
 228                  * Don't use strcpy, since it stops on a NUL.
 229                  */
 230                 memcpy(buf + l, tmp, nl);
 231                 l += nl;
 232                 if (limit_check && l >= MAXDATA) {
 233                         fprintf
 234                             (stderr,
 235                              "%s: too much data in input - more than %d bytes\n"
 236                              "  use the -nolimit argument to remove the limit check.\n", prog_name, MAXDATA);
 237                         exit(1);
 238                 }
 239         }
 240
 241         if (clear_selection) {
 242                 XSetSelectionOwner(dpy, XA_PRIMARY, None, CurrentTime);
 243         }
 244         if (buf) {
 245                 XStoreBuffer(dpy, buf, l, buffer);
 246         }
 247         XFlush(dpy);
 248         XCloseDisplay(dpy);
 249         exit(buf == NULL || errno != 0);
 250 }