1 /* Command-line output logging for GDB, the GNU debugger.
3 Copyright (C) 2003-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 /* These hold the pushed copies of the gdb output files.
26 If NULL then nothing has yet been pushed. */
27 struct saved_output_files
33 struct ui_file *targerr;
35 static struct saved_output_files saved_output;
36 static char *saved_filename;
38 static char *logging_filename;
40 show_logging_filename (struct ui_file *file, int from_tty,
41 struct cmd_list_element *c, const char *value)
43 fprintf_filtered (file, _("The current logfile is \"%s\".\n"),
47 static int logging_overwrite;
50 set_logging_overwrite (char *args, int from_tty, struct cmd_list_element *c)
53 warning (_("Currently logging to %s. Turn the logging off and on to "
54 "make the new setting effective."), saved_filename);
58 show_logging_overwrite (struct ui_file *file, int from_tty,
59 struct cmd_list_element *c, const char *value)
61 fprintf_filtered (file,
62 _("Whether logging overwrites or "
63 "appends to the log file is %s.\n"),
67 /* Value as configured by the user. */
68 static int logging_redirect;
70 /* The on-disk file in use if logging is currently active together
71 with redirection turned off (and therefore using tee_file_new).
72 For active logging with redirection the on-disk file is directly in
73 GDB_STDOUT and this variable is NULL. */
74 static struct ui_file *logging_no_redirect_file;
77 set_logging_redirect (char *args, int from_tty, struct cmd_list_element *c)
79 struct cleanup *cleanups;
80 struct ui_file *output, *new_logging_no_redirect_file;
81 struct ui_out *uiout = current_uiout;
83 if (saved_filename == NULL
84 || (logging_redirect != 0 && logging_no_redirect_file == NULL)
85 || (logging_redirect == 0 && logging_no_redirect_file != NULL))
88 cleanups = make_cleanup (null_cleanup, NULL);
90 if (logging_redirect != 0)
92 gdb_assert (logging_no_redirect_file != NULL);
94 /* ui_out_redirect still has not been called for next
96 make_cleanup_ui_file_delete (gdb_stdout);
98 output = logging_no_redirect_file;
99 new_logging_no_redirect_file = NULL;
102 fprintf_unfiltered (saved_output.out, "Redirecting output to %s.\n",
107 gdb_assert (logging_no_redirect_file == NULL);
108 output = tee_file_new (saved_output.out, 0, gdb_stdout, 0);
110 perror_with_name (_("set logging"));
111 new_logging_no_redirect_file = gdb_stdout;
114 fprintf_unfiltered (saved_output.out, "Copying output to %s.\n",
118 /* Give the current interpreter a chance to do anything special that
119 it might need for logging, such as updating other channels. */
120 if (current_interp_set_logging (1, output, NULL) == 0)
125 gdb_stdtarg = output;
126 gdb_stdtargerr = output;
129 logging_no_redirect_file = new_logging_no_redirect_file;
131 /* There is a former output pushed on the ui_out_redirect stack. We
132 want to replace it by OUTPUT so we must pop the former value
133 first. Ideally, we should either do both the pop and push or do
136 uiout->redirect (NULL);
137 uiout->redirect (output);
139 do_cleanups (cleanups);
143 show_logging_redirect (struct ui_file *file, int from_tty,
144 struct cmd_list_element *c, const char *value)
146 fprintf_filtered (file, _("The logging output mode is %s.\n"), value);
149 /* If we've pushed output files, close them and pop them. */
151 pop_output_files (void)
153 if (logging_no_redirect_file)
155 ui_file_delete (logging_no_redirect_file);
156 logging_no_redirect_file = NULL;
159 if (current_interp_set_logging (0, NULL, NULL) == 0)
161 /* Only delete one of the files -- they are all set to the same
163 ui_file_delete (gdb_stdout);
165 gdb_stdout = saved_output.out;
166 gdb_stderr = saved_output.err;
167 gdb_stdlog = saved_output.log;
168 gdb_stdtarg = saved_output.targ;
169 gdb_stdtargerr = saved_output.targerr;
172 saved_output.out = NULL;
173 saved_output.err = NULL;
174 saved_output.log = NULL;
175 saved_output.targ = NULL;
176 saved_output.targerr = NULL;
178 /* Stay consistent with handle_redirections. */
179 if (!current_uiout->is_mi_like_p ())
180 current_uiout->redirect (NULL);
183 /* This is a helper for the `set logging' command. */
185 handle_redirections (int from_tty)
187 struct cleanup *cleanups;
188 struct ui_file *output;
189 struct ui_file *no_redirect_file = NULL;
191 if (saved_filename != NULL)
193 fprintf_unfiltered (gdb_stdout, "Already logging to %s.\n",
198 output = gdb_fopen (logging_filename, logging_overwrite ? "w" : "a");
200 perror_with_name (_("set logging"));
201 cleanups = make_cleanup_ui_file_delete (output);
203 /* Redirects everything to gdb_stdout while this is running. */
204 if (!logging_redirect)
206 no_redirect_file = output;
208 output = tee_file_new (gdb_stdout, 0, no_redirect_file, 0);
210 perror_with_name (_("set logging"));
211 make_cleanup_ui_file_delete (output);
213 fprintf_unfiltered (gdb_stdout, "Copying output to %s.\n",
215 logging_no_redirect_file = no_redirect_file;
219 gdb_assert (logging_no_redirect_file == NULL);
222 fprintf_unfiltered (gdb_stdout, "Redirecting output to %s.\n",
226 discard_cleanups (cleanups);
228 saved_filename = xstrdup (logging_filename);
229 saved_output.out = gdb_stdout;
230 saved_output.err = gdb_stderr;
231 saved_output.log = gdb_stdlog;
232 saved_output.targ = gdb_stdtarg;
233 saved_output.targerr = gdb_stdtargerr;
235 /* Let the interpreter do anything it needs. */
236 if (current_interp_set_logging (1, output, no_redirect_file) == 0)
241 gdb_stdtarg = output;
242 gdb_stdtargerr = output;
245 /* Don't do the redirect for MI, it confuses MI's ui-out scheme. */
246 if (!current_uiout->is_mi_like_p ())
247 current_uiout->redirect (output);
251 set_logging_on (char *args, int from_tty)
257 xfree (logging_filename);
258 logging_filename = xstrdup (rest);
260 handle_redirections (from_tty);
264 set_logging_off (char *args, int from_tty)
266 if (saved_filename == NULL)
271 fprintf_unfiltered (gdb_stdout, "Done logging to %s.\n", saved_filename);
272 xfree (saved_filename);
273 saved_filename = NULL;
277 set_logging_command (char *args, int from_tty)
279 printf_unfiltered (_("\"set logging\" lets you log output to a file.\n"
280 "Usage: set logging on [FILENAME]\n"
282 " set logging file FILENAME\n"
283 " set logging overwrite [on|off]\n"
284 " set logging redirect [on|off]\n"));
288 show_logging_command (char *args, int from_tty)
291 printf_unfiltered (_("Currently logging to \"%s\".\n"), saved_filename);
292 if (saved_filename == NULL
293 || strcmp (logging_filename, saved_filename) != 0)
294 printf_unfiltered (_("Future logs will be written to %s.\n"),
297 if (logging_overwrite)
298 printf_unfiltered (_("Logs will overwrite the log file.\n"));
300 printf_unfiltered (_("Logs will be appended to the log file.\n"));
304 if (logging_redirect)
305 printf_unfiltered (_("Output is being sent only to the log file.\n"));
307 printf_unfiltered (_("Output is being logged and displayed.\n"));
311 if (logging_redirect)
312 printf_unfiltered (_("Output will be sent only to the log file.\n"));
314 printf_unfiltered (_("Output will be logged and displayed.\n"));
318 /* Provide a prototype to silence -Wmissing-prototypes. */
319 extern initialize_file_ftype _initialize_cli_logging;
322 _initialize_cli_logging (void)
324 static struct cmd_list_element *set_logging_cmdlist, *show_logging_cmdlist;
326 add_prefix_cmd ("logging", class_support, set_logging_command,
327 _("Set logging options"), &set_logging_cmdlist,
328 "set logging ", 0, &setlist);
329 add_prefix_cmd ("logging", class_support, show_logging_command,
330 _("Show logging options"), &show_logging_cmdlist,
331 "show logging ", 0, &showlist);
332 add_setshow_boolean_cmd ("overwrite", class_support, &logging_overwrite, _("\
333 Set whether logging overwrites or appends to the log file."), _("\
334 Show whether logging overwrites or appends to the log file."), _("\
335 If set, logging overrides the log file."),
336 set_logging_overwrite,
337 show_logging_overwrite,
338 &set_logging_cmdlist, &show_logging_cmdlist);
339 add_setshow_boolean_cmd ("redirect", class_support, &logging_redirect, _("\
340 Set the logging output mode."), _("\
341 Show the logging output mode."), _("\
342 If redirect is off, output will go to both the screen and the log file.\n\
343 If redirect is on, output will go only to the log file."),
344 set_logging_redirect,
345 show_logging_redirect,
346 &set_logging_cmdlist, &show_logging_cmdlist);
347 add_setshow_filename_cmd ("file", class_support, &logging_filename, _("\
348 Set the current logfile."), _("\
349 Show the current logfile."), _("\
350 The logfile is used when directing GDB's output."),
352 show_logging_filename,
353 &set_logging_cmdlist, &show_logging_cmdlist);
354 add_cmd ("on", class_support, set_logging_on,
355 _("Enable logging."), &set_logging_cmdlist);
356 add_cmd ("off", class_support, set_logging_off,
357 _("Disable logging."), &set_logging_cmdlist);
359 logging_filename = xstrdup ("gdb.txt");