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* base: Annotate output with job information.Maxim Cournoyer2022-07-071-58/+270
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Before this change, it was difficult to discern which job emitted which output, as there was no information connecting the job to the output it produced. This change rectifies that by annotating each line output by cron/mcron with a prefix that contains a timestamp and the job name. It also reports about when the job runs and whether it completed successfully or failed. It was initially suggested here: <https://issues.guix.gnu.org/36510>. Thanks to the fine people from the #guile libera.chat IRC channel for providing ideas and help; this change would not have been possible without them! * src/mcron/base.scm (install-suspendable-ports!): Install suspendable ports. (%date-format, %log-format): New parameters. (validate-date-format, validate-log-format): New procedures. (<job-data>): New record. (run-job): Update doc. Redirect stdout and stderr to a pipe. Return a <job-data> instance containing the input port and other information about the job. Output job status messages. (process-output): New procedure. (child-cleanup): Add docstring. Use positive logic. Call 'process-output' one last time after a child process is collected. (run-job-loop): Add a CHILDREN-DATA variable to the loop. Provide the open file descriptors of the children ports to select*, and collect their output when they trigger select. * tests/base.scm ("run-job: basic"): Adjust and fix indentation. (dummy-job/capture-output): New procedure. ("run-job, output"): New test. ("validate-date-format, valid", "validate-date-format, invalid") ("validate-log-format, valid", "validate-log-format, invalid") ("run-job, output with custom format", "run-job, failure") ("run-job, failure in shell action"): New tests. * src/mcron/scripts/cron.scm (show-help): Document new options. (%options) [log-format, date-format]: New options. (main): Parameterize the main loop with the new parameter options (or their default values when not provided); move exception handling elsewhere (see below). * src/mcron/scripts/mcron.scm: Likewise. * src/cron.in: Install error handler here. * src/mcron.in: Likewise. * doc/mcron.texi: Document new cron and mcron options, as well as new (mcron base) APIs. * tests/basic.sh: Test the new options. Suggested-by: Robert Vollmert <rob@vllmrt.net>
* Revert "Minor cosmetic simplification of case logic after previous patch."Dale Mellor2022-01-101-25/+25
| | | | This reverts commit 99a26e5de6d132056999074ce4f4f2cf24ec8c2f.
* Minor cosmetic simplification of case logic after previous patch.Dale Mellor2021-12-301-25/+25
| | | | * src/mcron/base.scm: change around some /cond/s and /if/s.
* base: Handle nonexistent user home directories.Maxim Cournoyer2021-12-301-1/+11
| | | | | | | | This is useful for running jobs as the "nobody" user, for example. * src/mcron/base.scm (run-job): Catch the ENOENT (2, "No such file or directory") error when attempting to change directory to the user home directory.
* project: banish need for C compilerDale Mellor2020-04-201-1/+1
| | | | | | | | | | This patch gets rid of the thin veneer that we currently have around the three executables. This was done for historical reasons (circa 2003 Guile couldnʼt deal with process signals and forks). In fact these problems were fixed many moons ago, and there is now no need for it. The project becomes 100% Guile! Many files are affected; interested coders should use the GIT repository to understand the details of all the changes.
* base: Avoid 'call-with-current-continuation'.Ludovic Courtès2020-02-271-22/+22
| | | | | | | | 'call-with-current-continuation' is overkill and not quite what we want. 'let/ec' is supported in Guile 2.0, 2.2, and 3.0. * src/mcron/base.scm (run-job-loop): Use 'let/ec' instead of 'call-with-current-continuation'.
* base: Call 'child-cleanup' when 'select' returns an empty set.Ludovic Courtès2020-02-271-14/+26
| | | | | | | | Previously, on Guile >= 2.2, we'd lose this opportunity to call 'child-cleanup', possibly leaving zombies behind us. * src/mcron/base.scm (run-job-loop): Define 'select*'. Don't expect 'select*' to throw upon EINTR or EAGAIN.
* base: Box 'number-children'Mathieu Lirzin2018-03-241-6/+15
| | | | | | | | | * src/mcron/base.scm (number-children): Box it using SRFI-111 to be explicit about the mutability of this object. (update-number-children!): New procedure. (run-job, child-cleanup): Use it. * tests/base.scm ("update-number-children!: 1+") ("number-children: init", "update-number-children!: 1-"): New tests.
* base: Rewrite 'child-cleanup'Mathieu Lirzin2018-03-241-6/+6
| | | | * src/mcron/base.scm (child-cleanup): Use recursion instead of 'do'.
* utils: Add 'get-user'Mathieu Lirzin2018-03-241-3/+2
| | | | | | * src/mcron/utils.scm (get-user): New procedure. * src/mcron/job-specifier.scm (job): Use it. * src/mcron/base.scm (remove-user-jobs): Likewise.
* base: Rewrite 'find-next-jobs' docstring.Mathieu Lirzin2018-03-241-15/+4
| | | | | * src/mcron/base.scm (find-next-jobs): Don't explain the detail of implementation in the docstring.
* base: Add '<schedule>' record data typeMathieu Lirzin2018-03-241-66/+77
| | | | | | | | | | | | | | | | | | Reifying the notion of a schedule helps reasoning about the code. Passing a schedule as an argument to related procedures allows writing simpler unit tests. * src/mcron/base.scm(<schedule>): New record data type. (make-schedule, schedule-user, set-schedule-user!) (schedule-system, set-schedule-system!) (schedule-current, set-schedule-current!): New procedures. (system-job-list, user-job-list, configuration-source): Replace those global variables with ... (%global-schedule): ... this global <schedule> instance. * src/mcron/base.scm (use-system-job-list, use-user-job-list) (remove-user-jobs, clear-system-jobs, add-job, find-next-jobs) (display-schedule, run-job-loop): Add '#:SCHEDULE' keyword argument. * doc/mcron.texi (The base module): Update documentation.
* base: Add 'display-schedule' procedureMathieu Lirzin2018-03-161-27/+19
| | | | | | | | | | | | | This procedure is a more generic and less coupled version of 'get-schedule' which has been kept for backward compatibility and deprecated. * src/mcron/base.scm (display-schedule): New procedure. (get-schedule): Move to ... * src/mcron/core.scm: ... here. * src/mcron/scripts/cron.scm (main): Use 'display-schedule'. * src/mcron/scripts/mcron.scm (main): Likewise. * doc/mcron.texi (The base module): Document it.
* base: Add 'run-job' procedure.Mathieu Lirzin2017-09-281-31/+20
| | | | | | * src/mcron/base.scm (run-jobs): Delete. (run-job): New procedure. (run-job-loop): Use it.
* base: find-next-jobs: Use functional style.Mathieu Lirzin2016-12-281-40/+29
| | | | | * src/mcron/base.scm (find-next-jobs): Rewrite it using functional style. Add docstring.
* all: Gather module imports.Mathieu Lirzin2016-12-281-16/+12
| | | | | | | * src/mcron/base.scm: Gather module imports. * src/mcron/redirect.scm: Likewise. * src/mcron/vixie-specification.scm: Likewise. * src/mcron/vixie-time.scm: Likewise.
* maint: Reformat copyright notices and copying permission statements.Mathieu Lirzin2016-12-281-20/+19
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* base: Rewrite 'run-job-loop'.Mathieu Lirzin2016-12-281-44/+33
| | | | | * src/mcron/base.scm (run-job-loop): Use #:optional keyword argument, and 'match'.
* base: run-jobs: Ensure that the child process always terminates.Ludovic Courtès2016-05-071-7/+11
| | | | * src/mcron/base.scm (run-jobs): Use 'dynamic-wind' instead of 'begin'.
* base: Rename (mcron core) module to (mcron base).Mathieu Lirzin2016-05-071-0/+270
The 'configure' script deletes the 'core.*' files. Having a file named 'base.scm' instead of 'core.scm' simplifies the build process without changing the semantics. * src/mcron/mcron-core.scm: Rename to ... * src/mcron/base.scm: ... this. All module users changed. * Makefile.am (MODULES): Add 'src/mcron/base.scm'. (CP): Remove variable. (src/mcron/core.scm): Remove target. (GEN_MODULES): Remove 'src/mcron/core.scm'. (dist_mcronmodule_DATA): Remove 'src/mcron/mcron-core.scm' * doc/mcron.texi: Adapt to name change. * .gitignore: Update.
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