3 * $Id: xcatch.c,v 1.6 1999/05/19 20:41:15 mdw Exp $
5 * Catch input and trap it in an X window
7 * (c) 1998 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the Edgeware X tools collection.
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.
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.
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.
29 /*----- Revision history --------------------------------------------------*
32 * Revision 1.6 1999/05/19 20:41:15 mdw
33 * Track gratuitous change in mdwopt interface.
35 * Revision 1.5 1999/05/05 18:55:18 mdw
36 * Block SIGCHLD around the `fork' call to prevent a race.
38 * Revision 1.4 1999/03/24 22:23:57 mdw
39 * Improve display for large files. Keep newly added material in view if
40 * scrolled to bottom of window.
42 * Revision 1.3 1998/12/20 17:19:16 mdw
43 * Return exit status of child process, rather than always returning
46 * Revision 1.2 1998/12/16 00:10:58 mdw
47 * Fix tabbing in help text.
49 * Revision 1.1 1998/12/15 23:46:50 mdw
50 * New program: captures input and puts it in a window.
54 /*----- Header files ------------------------------------------------------*/
62 #include <sys/types.h>
70 #include <mLib/dstr.h>
71 #include <mLib/mdwopt.h>
72 #include <mLib/report.h>
73 #include <mLib/quis.h>
75 #include <mgLib/cancel.h>
76 #include <mgLib/msg.h>
78 /*----- Inportant state ---------------------------------------------------*/
80 static unsigned int flags;
87 static GtkWidget *textbox = 0;
90 static pid_t kid = -1;
93 /*----- Main code ---------------------------------------------------------*/
95 /* --- The window's closed --- */
97 static void killwin(GtkWidget *w, gpointer p)
105 /* --- Some input has arrived --- */
107 static void ready(gpointer data, gint fd, GdkInputCondition c)
114 /* --- If not ready to read then go away --- */
116 if (!(c & GDK_INPUT_READ))
119 /* --- Decide whether to scroll the window --- */
122 t = GTK_TEXT(textbox);
124 if (va->value + va->page_size < va->upper)
129 /* --- Read data into the buffer --- *
131 * This is a bit of a mess.
135 int r = read(fd, buf, sizeof(buf));
137 /* --- The read failed --- *
139 * Maybe there's no more data to read. In this case, we get
140 * @EWOULDBLOCK@, indicating it's time to stop and do something else.
141 * Otherwise something serious has happened.
145 if (errno == EWOULDBLOCK)
147 msg(":~OK", "error reading data: %s", strerror(errno));
151 /* --- End of file --- *
153 * If the box is closed, then exit quiety; otherwise wait for it to
166 /* --- If there's no output window, create one --- */
173 win = gtk_dialog_new();
174 gtk_signal_connect(GTK_OBJECT(win), "destroy",
175 GTK_SIGNAL_FUNC(killwin), 0);
177 tbl = gtk_table_new(2, 2, 0);
178 gtk_container_border_width(GTK_CONTAINER(tbl), 8);
179 gtk_box_pack_start(GTK_BOX(GTK_DIALOG(win)->vbox), tbl, 1, 1, 0);
180 gtk_widget_show(tbl);
182 textbox = gtk_text_new(0, 0);
183 t = GTK_TEXT(textbox);
185 gtk_table_attach(GTK_TABLE(tbl), textbox, 0, 1, 0, 1,
186 GTK_EXPAND | GTK_SHRINK | GTK_FILL,
187 GTK_EXPAND | GTK_SHRINK | GTK_FILL,
189 gtk_text_set_editable(t, 0);
190 gtk_widget_set_usize(textbox, 500, 300);
192 gtk_widget_show(textbox);
194 w = gtk_vscrollbar_new(va);
195 gtk_table_attach(GTK_TABLE(tbl), w, 1, 2, 0, 1,
196 0, GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);
199 w = gtk_hscrollbar_new(t->hadj);
200 gtk_table_attach(GTK_TABLE(tbl), w, 0, 1, 1, 2,
201 GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0, 0);
204 gtk_box_set_homogeneous(GTK_BOX(GTK_DIALOG(win)->action_area), 0);
205 w = gtk_button_new_with_label("Dismiss");
206 gtk_signal_connect_object(GTK_OBJECT(w), "clicked",
207 GTK_SIGNAL_FUNC(gtk_object_destroy),
209 gtk_box_pack_end(GTK_BOX(GTK_DIALOG(win)->action_area), w, 0, 0, 0);
210 GTK_WIDGET_SET_FLAGS(w, GTK_CAN_DEFAULT);
211 gtk_widget_grab_default(w);
212 cancel(GTK_WINDOW(win), w);
215 gtk_widget_show(win);
218 gtk_text_insert(t, font, 0, 0, buf, r);
224 gtk_adjustment_set_value(va, va->upper - va->page_size);
228 /* --- Signal handler --- */
230 static void reap(int sig)
236 k = waitpid(-1, &s, WNOHANG);
241 status = WEXITSTATUS(s);
248 /* --- Main program --- */
250 static void version(FILE *fp)
252 fprintf(fp, "%s (xtoys version " VERSION ")\n", QUIS);
255 static void usage(FILE *fp)
257 fprintf(fp, "Usage: %s [-f file] [-F font] [command [args...]]\n", QUIS);
260 int main(int argc, char *argv[])
266 gtk_init(&argc, &argv);
269 static struct option opt[] = {
270 { "help", 0, 0, 'h' },
271 { "usage", 0, 0, 'u' },
272 { "version", 0, 0, 'v' },
273 { "file", OPTF_ARGREQ, 0, 'f' },
274 { "font", OPTF_ARGREQ, 0, 'F' },
277 int i = mdwopt(argc, argv, "huvf:F:", opt, 0, 0, 0);
289 "Catches input from a pipe or other source, and captures it in a window.\n"
290 "Nothing is displayed if there's no input.\n"
292 "Options provided:\n"
294 "-h, --help Display this help text\n"
295 "-u, --usage Display a quick usage summary\n"
296 "-v, --version Display the version number\n"
297 "-f, --file=FILE\t Read input from the named file\n"
298 "-F, --font=FONT\t Display output in the named font\n",
311 if ((fd = open(optarg, O_RDONLY)) < 0) {
312 die(1, "couldn't open file: %s", strerror(errno));
317 font = gdk_font_load(optarg);
325 if (flags & f_bogus) {
336 sigset_t newmask, oldmask;
338 /* --- Set up a signal handler --- */
340 sa.sa_handler = reap;
341 sigemptyset(&sa.sa_mask);
343 sigaction(SIGCHLD, &sa, 0);
345 /* --- Start a child program --- */
348 die(1, "couldn't open pipe: %s", strerror(errno));
350 sigemptyset(&newmask);
351 sigaddset(&newmask, SIGCHLD);
352 sigprocmask(SIG_BLOCK, &newmask, &oldmask);
356 die(1, "couldn't fork: %s", strerror(errno));
361 if (pfd[1] != STDOUT_FILENO)
362 dup2(pfd[1], STDOUT_FILENO);
363 if (pfd[1] != STDERR_FILENO)
364 dup2(pfd[1], STDERR_FILENO);
365 if (pfd[1] != STDOUT_FILENO && pfd[1] != STDERR_FILENO)
367 execvp(argv[optind], argv + optind);
370 dstr_putf(&d, "%s: couldn't run `%s': %s\n",
371 QUIS, argv[optind], strerror(errno));
372 write(STDERR_FILENO, d.buf, d.len);
376 sigprocmask(SIG_SETMASK, &oldmask, 0);
383 int f = fcntl(fd, F_GETFL);
384 fcntl(fd, F_SETFL, f | O_NONBLOCK);
387 gdk_input_add(fd, GDK_INPUT_READ, ready, 0);
392 /*----- That's all, folks -------------------------------------------------*/