3 * $Id: xcatch.c,v 1.5 1999/05/05 18:55:18 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 1.5 1999/05/05 18:55:18 mdw
33 * Block SIGCHLD around the `fork' call to prevent a race.
35 * Revision 1.4 1999/03/24 22:23:57 mdw
36 * Improve display for large files. Keep newly added material in view if
37 * scrolled to bottom of window.
39 * Revision 1.3 1998/12/20 17:19:16 mdw
40 * Return exit status of child process, rather than always returning
43 * Revision 1.2 1998/12/16 00:10:58 mdw
44 * Fix tabbing in help text.
46 * Revision 1.1 1998/12/15 23:46:50 mdw
47 * New program: captures input and puts it in a window.
51 /*----- Header files ------------------------------------------------------*/
59 #include <sys/types.h>
67 #include <mLib/dstr.h>
68 #include <mLib/mdwopt.h>
69 #include <mLib/report.h>
70 #include <mLib/quis.h>
72 #include <mgLib/cancel.h>
73 #include <mgLib/msg.h>
75 /*----- Inportant state ---------------------------------------------------*/
77 static unsigned int flags
;
84 static GtkWidget
*textbox
= 0;
87 static pid_t kid
= -1;
90 /*----- Main code ---------------------------------------------------------*/
92 /* --- The window's closed --- */
94 static void killwin(GtkWidget
*w
, gpointer p
)
102 /* --- Some input has arrived --- */
104 static void ready(gpointer data
, gint fd
, GdkInputCondition c
)
111 /* --- If not ready to read then go away --- */
113 if (!(c
& GDK_INPUT_READ
))
116 /* --- Decide whether to scroll the window --- */
119 t
= GTK_TEXT(textbox
);
121 if (va
->value
+ va
->page_size
< va
->upper
)
126 /* --- Read data into the buffer --- *
128 * This is a bit of a mess.
132 int r
= read(fd
, buf
, sizeof(buf
));
134 /* --- The read failed --- *
136 * Maybe there's no more data to read. In this case, we get
137 * @EWOULDBLOCK@, indicating it's time to stop and do something else.
138 * Otherwise something serious has happened.
142 if (errno
== EWOULDBLOCK
)
144 msg(":~OK", "error reading data: %s", strerror(errno
));
148 /* --- End of file --- *
150 * If the box is closed, then exit quiety; otherwise wait for it to
163 /* --- If there's no output window, create one --- */
170 win
= gtk_dialog_new();
171 gtk_signal_connect(GTK_OBJECT(win
), "destroy",
172 GTK_SIGNAL_FUNC(killwin
), 0);
174 tbl
= gtk_table_new(2, 2, 0);
175 gtk_container_border_width(GTK_CONTAINER(tbl
), 8);
176 gtk_box_pack_start(GTK_BOX(GTK_DIALOG(win
)->vbox
), tbl
, 1, 1, 0);
177 gtk_widget_show(tbl
);
179 textbox
= gtk_text_new(0, 0);
180 t
= GTK_TEXT(textbox
);
182 gtk_table_attach(GTK_TABLE(tbl
), textbox
, 0, 1, 0, 1,
183 GTK_EXPAND
| GTK_SHRINK
| GTK_FILL
,
184 GTK_EXPAND
| GTK_SHRINK
| GTK_FILL
,
186 gtk_text_set_editable(t
, 0);
187 gtk_widget_set_usize(textbox
, 500, 300);
189 gtk_widget_show(textbox
);
191 w
= gtk_vscrollbar_new(va
);
192 gtk_table_attach(GTK_TABLE(tbl
), w
, 1, 2, 0, 1,
193 0, GTK_EXPAND
| GTK_SHRINK
| GTK_FILL
, 0, 0);
196 w
= gtk_hscrollbar_new(t
->hadj
);
197 gtk_table_attach(GTK_TABLE(tbl
), w
, 0, 1, 1, 2,
198 GTK_EXPAND
| GTK_SHRINK
| GTK_FILL
, 0, 0, 0);
201 gtk_box_set_homogeneous(GTK_BOX(GTK_DIALOG(win
)->action_area
), 0);
202 w
= gtk_button_new_with_label("Dismiss");
203 gtk_signal_connect_object(GTK_OBJECT(w
), "clicked",
204 GTK_SIGNAL_FUNC(gtk_object_destroy
),
206 gtk_box_pack_end(GTK_BOX(GTK_DIALOG(win
)->action_area
), w
, 0, 0, 0);
207 GTK_WIDGET_SET_FLAGS(w
, GTK_CAN_DEFAULT
);
208 gtk_widget_grab_default(w
);
209 cancel(GTK_WINDOW(win
), w
);
212 gtk_widget_show(win
);
215 gtk_text_insert(t
, font
, 0, 0, buf
, r
);
221 gtk_adjustment_set_value(va
, va
->upper
- va
->page_size
);
225 /* --- Signal handler --- */
227 static void reap(int sig
)
233 k
= waitpid(-1, &s
, WNOHANG
);
238 status
= WEXITSTATUS(s
);
245 /* --- Main program --- */
247 static void version(FILE *fp
)
249 fprintf(fp
, "%s (xtoys version " VERSION
")\n", QUIS
);
252 static void usage(FILE *fp
)
254 fprintf(fp
, "Usage: %s [-f file] [-F font] [command [args...]]\n", QUIS
);
257 int main(int argc
, char *argv
[])
263 gtk_init(&argc
, &argv
);
266 static struct option opt
[] = {
267 { "help", 0, 0, 'h' },
268 { "usage", 0, 0, 'u' },
269 { "version", 0, 0, 'v' },
270 { "file", gFlag_argReq
, 0, 'f' },
271 { "font", gFlag_argReq
, 0, 'F' },
274 int i
= mdwopt(argc
, argv
, "huvf:F:", opt
, 0, 0, 0);
286 "Catches input from a pipe or other source, and captures it in a window.\n"
287 "Nothing is displayed if there's no input.\n"
289 "Options provided:\n"
291 "-h, --help Display this help text\n"
292 "-u, --usage Display a quick usage summary\n"
293 "-v, --version Display the version number\n"
294 "-f, --file=FILE\t Read input from the named file\n"
295 "-F, --font=FONT\t Display output in the named font\n",
308 if ((fd
= open(optarg
, O_RDONLY
)) < 0) {
309 die(1, "couldn't open file: %s", strerror(errno
));
314 font
= gdk_font_load(optarg
);
322 if (flags
& f_bogus
) {
333 sigset_t newmask
, oldmask
;
335 /* --- Set up a signal handler --- */
337 sa
.sa_handler
= reap
;
338 sigemptyset(&sa
.sa_mask
);
340 sigaction(SIGCHLD
, &sa
, 0);
342 /* --- Start a child program --- */
345 die(1, "couldn't open pipe: %s", strerror(errno
));
347 sigemptyset(&newmask
);
348 sigaddset(&newmask
, SIGCHLD
);
349 sigprocmask(SIG_BLOCK
, &newmask
, &oldmask
);
353 die(1, "couldn't fork: %s", strerror(errno
));
358 if (pfd
[1] != STDOUT_FILENO
)
359 dup2(pfd
[1], STDOUT_FILENO
);
360 if (pfd
[1] != STDERR_FILENO
)
361 dup2(pfd
[1], STDERR_FILENO
);
362 if (pfd
[1] != STDOUT_FILENO
&& pfd
[1] != STDERR_FILENO
)
364 execvp(argv
[optind
], argv
+ optind
);
367 dstr_putf(&d
, "%s: couldn't run `%s': %s\n",
368 QUIS
, argv
[optind
], strerror(errno
));
369 write(STDERR_FILENO
, d
.buf
, d
.len
);
373 sigprocmask(SIG_SETMASK
, &oldmask
, 0);
380 int f
= fcntl(fd
, F_GETFL
);
381 fcntl(fd
, F_SETFL
, f
| O_NONBLOCK
);
384 gdk_input_add(fd
, GDK_INPUT_READ
, ready
, 0);
389 /*----- That's all, folks -------------------------------------------------*/