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* Solve deadlock in notification barLars Henriksen2018-07-281-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | calcurse deadlocks when 1) an upcoming appointment is on display in the notification bar, 2) an external command (like help) is started, 3) the time for the upcoming appointment arrives, and 4) the external command is exited. The notification bar thread is stopped while the external command is running. Upon exit from the external command, the n-bar thread is restarted and calcurse locks. The cause is the way in which the main notification bar thread is stopped: static pthread_t notify_t_main; void notify_stop_main_thread(void) { if (notify_t_main) { pthread_cancel(notify_t_main); pthread_join(notify_t_main, NULL); } } Objects of type pthread_t are opaque and should not be accessed directly. Initially notify_t_main is an uninitialised static variable (0), but later it has a value, which may or may not be the thread id of the notification main thread. Note that the thread id after exit of a thread may become the thread id of a new thread. Thus the variable set when the thread is created, is invalid after exit of the thread. Specifically, the first time notify_stop_main_thread() is called (by notify_start_main_thread() before the thread is created) is harmless (because notify_t_main is 0). Calling notify_stop_main_thread() later may be either OK because the main thread is running, or harmless because no thread with id notify_t_main is running: the two functions will fail with return value ESRCH (no such process), or fatal because an unrelated thread with this thread id is running: it will be cancelled, and the join may or may not succeed depending on whether the thread is joinable or detached. The "unrelated thread" could be the next-appointment thread, notify_thread_app, launched by notify_check_next_app(). Always calling notify_stop_main_thread() before starting the main thread becomes fatal when notify_check_next_app() is called shortly before notify_start_main_thread(). This is the case in the scenario described. The next-app-thread is then running when notify_stop_main_thread() is called, and apparently it has the thread id of the old main thread (confirmed by logging the return values from pthread_cancel() and pthread_join(); the first succeeds while the second fails with EINVALID which means that the thread is not joinable). The next-app-thread will therefore exit without unlocking mutexes. Ensure that notify_t_main, in case the notify main thread is not running, has a value that it will never have when it is running. A possibility is the thread id of the main() calcurse process (returned by pthread_self()). Check for this condition in notify_stop_main_thread() and set notify_t_main when the thread is stopped. Similar changes have been introduced for the periodic save thread and the calendar date thread. Signed-off-by: Lars Henriksen <LarsHenriksen@get2net.dk> Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Only lock save mutex as short as possibleLukas Fleischer2018-06-031-3/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Add option to specify the configuration file usedQuentin Hibon2018-05-281-3/+10
| | | | | | | | | The configuration file (~/.calcurse/conf by default) can now be specified with -C or --conf. Workaround for GitHub issue #86. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Always NUL-terminate buffer in io_load_keys()Lukas Fleischer2018-05-261-0/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Run pre-load hook before testing for modificationsLukas Fleischer2018-05-231-2/+4
| | | | | | | | | | | The pre-load hook is often used to manipulate the data files before loading, such as by synchronizing with a remote calendar. Make sure we always execute the pre-load hook upon reloads, even if the data files have not been modified. Fixes GitHub issue #98. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Unlock the save mutex as early as possibleLukas Fleischer2018-05-191-4/+5
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Do not prompt when non-interactive import failsLukas Fleischer2017-11-231-17/+11
| | | | | | | | | | When running calcurse in non-interactive mode, we should not expect any user input. This is even more important in the case of iCal imports which are used by calcurse-caldav to import events from CalDAV servers. Partly fixes GitHub issue #73. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Reload data after resolving save conflictLukas Fleischer2017-09-081-1/+10
| | | | | | | After resolving a save conflict with the merge tool, we need to reload the data files to import the result of the conflict resolution. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Unset modification flag after mergingLukas Fleischer2017-09-081-0/+2
| | | | | | | Turn off the local modification flag to avoid a bogus warning when reloading the data files immediately after the merge process. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Recompute hashes after savingLukas Fleischer2017-09-081-0/+3
| | | | | | | After saving the data files, we need to recompute and store the hashes to make sure the updated contents is reflected. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Factor out hash computationLukas Fleischer2017-09-081-7/+14
| | | | | | Move code to compute the hash of a data file to a separate function. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Use a shared input/output mutexLukas Fleischer2017-09-081-14/+23
| | | | | | | | | Replace the save mutex with a common mutex, which is locked whenever read or write operations on the data files are performed. Also, since this mutex is an implementation detail, mark the locking functions static and remove them from the header file. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Only reload if data files were changedLukas Fleischer2017-09-081-1/+8
| | | | | | | | Instead of blindly reloading data in io_reload_data(), compare the stored hashes of the data files with hashes of the current file contents and only reload if any of the hashes differs. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Factor out check for external modificationsLukas Fleischer2017-09-081-15/+20
| | | | | | | | Move the check to compare the stored hashes of the data files with the current hash to a separate function. This makes the code easier to read and reusable. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Do not blindly overwrite files when savingLukas Fleischer2017-09-081-0/+59
| | | | | | | | | When reading the data files, compute a cryptographic hash of the file contents and store it. When saving the files later, ensure that the hash still matches the current file contents. If it does not, show a warning to the user and ask whether she wants to execute the merge tool. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Use .new as file extension when mergingLukas Fleischer2017-09-081-15/+15
| | | | | | | | Using the file name extension .sav and naming the variables "backup" is slightly misleading, since the affected files actually contain the updated content and not some old snapshot. Use the term "new" instead. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Factor out merge routineLukas Fleischer2017-09-081-48/+44
| | | | | | | Move the code, which runs the merge tool with current and updated data files, to a separate function to make it reusable. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Add a function to wait for any key pressLukas Fleischer2017-09-031-7/+7
| | | | | | | Introduce a new function keys_wait_for_any_key() and use it instead of wgetch() whenever the return value is discarded. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Include stdarg.h when using variable argument listsLukas Fleischer2017-07-281-0/+1
| | | | | | Fixes GitHub issue #36. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Update copyright rangesLukas Fleischer2017-01-121-1/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Always use memory management wrappersLukas Fleischer2016-10-131-2/+2
| | | | | | | Use mem_*() wrappers instead of directly accessing libc functions when allocating/deallocating memory. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Fix segmentation fault on reload with pre-load hookLukas Fleischer2016-02-151-0/+8
| | | | | | | | | | | We need to manually force a reinitialization of the todo item list box before reloading the items. Otherwise, the list box contains dangling references to the linked list of todo items which has already been cleared at this point. After the pre-load hook is called, the windows are redrawn by wins_unprepare_external() and these invalid references are accessed, leading to a segmentation fault. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Support format strings when dumping imported itemsLukas Fleischer2016-02-111-3/+7
| | | | | | | | | | | | | | In commit 3eae7ce (Add --list-imported command line option, 2016-01-12), we added an option to print the hashes of imported items to stdout. Extend this command line option such that it dumps the items using the specified formatting strings. With the new behavior it is, for example, easier to check items for import errors. Also, rename the option from --list-imported to --dump-imported (it is not part of any official release yet so we do not need to care about backwards compatibility). Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Refactor grep modeLukas Fleischer2016-02-051-0/+42
| | | | | | | | | Split io_save_{apts,todo}() into functions that write raw data to a file and functions that write formatted items to stdout such that one can easily extend the grep mode for format string support in a follow-up commit. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Update copyright rangesLukas Fleischer2016-01-301-1/+1
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Use a separate field for the completed statusLukas Fleischer2016-01-181-5/+14
| | | | | | | Add a new field that indicates whether a todo item is completed or not instead of encoding completed todo items by negative priorities. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Run pre-save and post-save hooks on reloadLukas Fleischer2016-01-151-0/+17
| | | | Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Export item UIDs upon requestLukas Fleischer2016-01-151-2/+2
| | | | | | | Add a new --export-uid command line option that adds each item's hash to the UID property when exporting. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Import data from stdin when the import file is "-"Lukas Fleischer2016-01-151-1/+4
| | | | | | | Support "-" as file name to the -i/--import option and read from stdin when that file is specified. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Hide import statistics in quiet modeLukas Fleischer2016-01-131-1/+1
| | | | | | | | Do not show the import summary when system dialogs are disabled or when the --quiet option is specified, even if calcurse is executed in non-interactive mode. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Add --list-imported command line optionLukas Fleischer2016-01-131-2/+2
| | | | | | | When this option is used together with -i/--import, the object identifiers of imported objects are printed to stdout. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Add command line option to suppress dialogsLukas Fleischer2016-01-131-4/+4
| | | | | | | Implement a -q/--quiet command line option to disable system dialogs temporarily. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Add an option to filter by object hashLukas Fleischer2016-01-131-2/+14
| | | | | | | | | Implement a new --filter-hash option to filter by object identifiers. Each object having an identifier that has the specified pattern as a prefix is matched. Patterns starting with an exclamation mark (!) are interpreted as negative patterns. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Add pre-load and post-load hooksLukas Fleischer2016-01-101-0/+2
| | | | | | Potential use case: Synchronize data with some server before loading. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Add pre-save and post-save hooksLukas Fleischer2016-01-071-0/+4
| | | | | | | | | | | | | This adds support for hooks which are executed before/after saving calcurse data. Hooks can be placed under hooks/pre-save and hooks/post-save in the data directory and need to be executable. Potential use cases include: * Automatically commit any changes to the data files using a VCS. * Automatically sync with some sever component on data file changes. Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
* Update copyright rangesLukas Fleischer2015-02-071-1/+1
| | | | Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Factor out item reload codeLukas Fleischer2014-10-101-0/+95
| | | | | | | Adds a new function io_reload_data() which can be used to reload all appointments and TODO items. Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Add io_load_data() wrapperLukas Fleischer2014-10-101-0/+7
| | | | Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Retain comments in descriptions and config valuesLukas Fleischer2014-08-181-1/+1
| | | | | | | | | Comments should only be stripped if they start at the beginning of a line. We do not want to chop off an TODO item description or a configuration value. Reported-by: Håkan Jerning <jerning@home.se> Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Add a grep modeLukas Fleischer2014-08-071-10/+22
| | | | | | | This allows for printing a subset of the items in the data files by using filters. Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* io.c: Error out on non-existent calendar fileLukas Fleischer2014-08-061-38/+3
| | | | | | | | Show an error message and die if the user specified a non-existent custom calendar file. This fixes some random hangs when calcurse is used in non-interactive mode within scripts. Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Allow for filtering TODO itemsLukas Fleischer2014-08-061-1/+17
| | | | | | | | | | | The item filters now apply to both appointments and TODO items. Also, add a new type mask "todo" and the following new filter options: * --filter-priority * --filter-completed * --filter-uncompleted Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Add item filtersLukas Fleischer2014-08-061-5/+6
| | | | | | | | | | | | | | | | | This adds the following filter options that allow for restricting the set of items that are read from the appointments file: * --filter-type * --filter-start-from * --filter-start-to * --filter-start-after * --filter-start-before * --filter-end-from * --filter-end-to * --filter-end-after * --filter-end-before Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* io.c: Remove superfluous space from messageLukas Fleischer2014-07-281-1/+1
| | | | Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Refactor new_tempfile()Lukas Fleischer2014-07-221-13/+20
| | | | | | | | Avoid preallocating buffers on the stack, use dynamic memory allocation instead. Also, change the semantics of new_tempfile() so that it returns the full name of the temporary file and fix all call sites. Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Replace several uses of snprintf() by asprintf()Lukas Fleischer2014-07-221-35/+36
| | | | | | | | Use asprintf() in some cold code paths. While allocating memory on the heap is a bit slower, using asprintf() is a bit more memory efficient and less prone to buffer overflow errors. Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Small code cleanupsLukas Fleischer2014-07-181-18/+15
| | | | Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Do not display dialog on periodic saveLukas Fleischer2014-07-181-1/+2
| | | | | | | | When periodic save is enabled, do not print the "The data files were successfully saved" dialog every time io_save_cal() is called. Reported-by: Håkan Jerning <jerning@home.se> Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Only run the merge tool on files with differencesLukas Fleischer2014-07-171-0/+26
| | | | | | | If the backup file and the data file are equal, there is no need to run the merge tool. Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
* Refactor wins_launch_external()Lukas Fleischer2014-07-161-2/+4
| | | | | | | | Allow for passing an arbitrary number of arguments. This also allows us to remove wins_launch_external2() and use wins_launch_external() at all call sites instead. Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
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