Change to the linux kernel coding style
[wmaker-crm.git] / util / wxpaste.c
1 /* wxpaste.c- paste contents of cutbuffer to stdout
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 #define PROG_VERSION "wxpaste (Window Maker) 0.3"
21
22 #include "../src/config.h"
23
24 #include <stdio.h>
25 #include <stdlib.h>
26 #include <unistd.h>
27 #include <string.h>
28 #include <errno.h>
29 #include <X11/Xlib.h>
30 #include <X11/Xatom.h>
31 #include <sys/time.h>
32 #include <sys/types.h>
33 #ifdef HAVE_SYS_SELECT_H
34 # include <sys/select.h>
35 #endif
36
37 #define MAXDATA (4*1024*1024)
38
39 void help(char *progn)
40 {
41 printf("Usage: %s [OPTIONS] [FILE]\n", progn);
42 puts("Copies data from X selection or cutbuffer to FILE or stdout.");
43 puts("");
44 puts(" -display display display to use");
45 puts(" --cutbuffer number cutbuffer number to get data from");
46 puts(" --selection [selection] reads data from named selection instead of\n"
47 " cutbuffer");
48 puts(" --help display this help and exit");
49 puts(" --version output version information and exit");
50 }
51
52 Time getTimestamp(Display * dpy, Window win)
53 {
54 XEvent ev;
55
56 /* So we do this trickery to get a time stamp:
57 *
58 * 1. Grab the server because we are paranoid and don't want to
59 * get in a race with another instance of wxpaste being ran at the
60 * same time.
61 *
62 * 2. Set a dummy property in our window.
63 *
64 * 3. Get the PropertyNotify event and get it's timestamp.
65 *
66 * 4. Ungrab the server.
67 */
68
69 XSelectInput(dpy, win, PropertyChangeMask);
70
71 /* Generate a PropertyNotify event */
72 XStoreName(dpy, win, "shit");
73
74 /* wait for the event */
75 while (1) {
76 XNextEvent(dpy, &ev);
77 if (ev.type == PropertyNotify)
78 break;
79 }
80
81 return ev.xproperty.time;
82 }
83
84 char *fetchSelection(Display * dpy, char *selection, char *progName)
85 {
86 Atom selatom = XInternAtom(dpy, selection, False);
87 Atom clipatom = XInternAtom(dpy, "CLIPBOARD", False);
88 Time now;
89 XEvent ev;
90 Window win;
91 int ok = 0;
92 struct timeval timeout;
93 fd_set fdset;
94
95 win = XCreateSimpleWindow(dpy, DefaultRootWindow(dpy), 0, 0, 1, 1, 0, 0, 0);
96 /*
97 * The ICCCM says that we can't pass CurrentTime as the timestamp
98 * for XConvertSelection(), but we don't have anything to use as
99 * a timestamp...
100 */
101 now = getTimestamp(dpy, win);
102
103 XConvertSelection(dpy, selatom, XA_STRING, clipatom, win, now);
104
105 timeout.tv_sec = 1;
106 timeout.tv_usec = 0;
107
108 /* wait for the convertion */
109 while (0) {
110 int res;
111
112 if (XPending(dpy) == 0) {
113 FD_ZERO(&fdset);
114 FD_SET(ConnectionNumber(dpy), &fdset);
115 res = select(ConnectionNumber(dpy) + 1, &fdset, NULL, NULL, &timeout);
116 if (res <= 0) {
117 ok = 0;
118 break;
119 }
120 }
121 if (res > 0 || XPending(dpy) > 0) {
122 XNextEvent(dpy, &ev);
123 if (ev.type == SelectionNotify && ev.xany.window == win) {
124 ok = 1;
125 break;
126 }
127 }
128 }
129
130 /* if success, return the data */
131 if (ok) {
132 Atom rtype;
133 int bits;
134 unsigned long len, bytes;
135 unsigned char *data;
136
137 if (XGetWindowProperty(dpy, win, clipatom, 0, MAXDATA / 4, False,
138 XA_STRING, &rtype, &bits, &len, &bytes, &data) != 0)
139 return NULL;
140
141 if ((rtype != XA_STRING) || (bits != 8)) {
142 return NULL;
143 } else {
144 return (char *)data;
145 }
146 }
147 return NULL;
148 }
149
150 int main(int argc, char **argv)
151 {
152 Display *dpy;
153 int i, l;
154 int buffer = 0;
155 char *buf;
156 int status;
157 char *display_name = "";
158 char *selection_name = NULL;
159
160 for (i = 1; i < argc; i++) {
161 if (argv[i][0] == '-') {
162 if (argv[i][1] == 'h' || strcmp(argv[i], "--help") == 0) {
163 help(argv[0]);
164 exit(0);
165 } else if (strcmp(argv[i], "--version") == 0) {
166 puts(PROG_VERSION);
167 exit(0);
168 } else if (strcmp(argv[i], "-selection") == 0 || strcmp(argv[i], "--selection") == 0) {
169 if (i < argc - 1) {
170 selection_name = argv[++i];
171 } else {
172 selection_name = "PRIMARY";
173 }
174 } else if (strcmp(argv[i], "-display") == 0) {
175 if (i < argc - 1) {
176 display_name = argv[++i];
177 } else {
178 help(argv[0]);
179 exit(0);
180 }
181 } else if (strcmp(argv[i], "-cutbuffer") == 0 || strcmp(argv[i], "--cutbuffer") == 0) {
182 if (i < argc - 1) {
183 i++;
184 if (sscanf(argv[i], "%i", &buffer) != 1) {
185 fprintf(stderr, "%s: could not convert \"%s\" to int\n",
186 argv[0], argv[i]);
187 exit(1);
188 }
189 if (buffer < 0 || buffer > 7) {
190 fprintf(stderr, "%s: invalid buffer number %i\n", argv[0], buffer);
191 exit(1);
192 }
193 } else {
194 fprintf(stderr, "%s: invalid argument '%s'\n", argv[0], argv[i]);
195 fprintf(stderr, "Try '%s --help' for more information.\n", argv[0]);
196 exit(1);
197 }
198 }
199 } else {
200 fprintf(stderr, "%s: invalid argument '%s'\n", argv[0], argv[i]);
201 fprintf(stderr, "Try '%s --help' for more information.\n", argv[0]);
202 exit(1);
203 }
204 }
205 dpy = XOpenDisplay(display_name);
206 if (!dpy) {
207 fprintf(stderr, "%s: could not open display \"%s\"\n", argv[0], XDisplayName(display_name));
208 exit(1);
209 }
210
211 if (selection_name) {
212 buf = fetchSelection(dpy, selection_name, argv[0]);
213 } else {
214 buf = NULL;
215 }
216
217 if (buf == NULL) {
218 buf = XFetchBuffer(dpy, &l, buffer);
219 }
220
221 if (buf == NULL) {
222 status = 1;
223 } else {
224 if (write(STDOUT_FILENO, buf, l) == -1)
225 status = errno;
226 else
227 status = 0;
228 }
229 XCloseDisplay(dpy);
230 exit(status);
231 }