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authorDavid Oberhollenzer <david.oberhollenzer@tele2.at>2018-09-18 15:30:25 +0200
committerDavid Oberhollenzer <david.oberhollenzer@tele2.at>2018-09-19 12:22:14 +0200
commitb9ba11b4db9c862ca1d2c90cafcf6495183619a9 (patch)
treee5ef035b8cc2e9bcfdf3112ce64a0a416dd75b40 /cmd
parentf38163772cb8ca25c440393132e8678e65437320 (diff)
Add service commands to manage gcrond services
Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
Diffstat (limited to 'cmd')
-rw-r--r--cmd/Makemodule.am5
-rw-r--r--cmd/service/schedule.c90
-rw-r--r--cmd/service/service.811
-rw-r--r--cmd/service/unschedule.c82
4 files changed, 187 insertions, 1 deletions
diff --git a/cmd/Makemodule.am b/cmd/Makemodule.am
index d19894f..76a0e49 100644
--- a/cmd/Makemodule.am
+++ b/cmd/Makemodule.am
@@ -26,6 +26,11 @@ service_CFLAGS = $(AM_CFLAGS)
service_LDFLAGS = $(AM_LDFLAGS)
service_LDADD = libinit.a libcfg.a
+if GCROND
+service_SOURCES += cmd/service/schedule.c
+service_SOURCES += cmd/service/unschedule.c
+endif
+
if USYSLOGD
syslog_SOURCES = cmd/syslog.c
syslog_CPPFLAGS = $(AM_CPPFLAGS)
diff --git a/cmd/service/schedule.c b/cmd/service/schedule.c
new file mode 100644
index 0000000..41a4f1d
--- /dev/null
+++ b/cmd/service/schedule.c
@@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * Copyright (C) 2018 - David Oberhollenzer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "servicecmd.h"
+
+static int cmd_schedule(int argc, char **argv)
+{
+ char *target, *linkname, *ptr;
+ int ret = EXIT_FAILURE;
+ struct stat sb;
+
+ if (check_arguments(argv[0], argc, 2, 2))
+ return EXIT_FAILURE;
+
+ for (ptr = argv[1]; isalnum(*ptr) || *ptr == '_'; ++ptr)
+ ;
+
+ if (*ptr != '\0') {
+ fprintf(stderr, "Invalid service name '%s'\n", argv[1]);
+ tell_read_help(argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ if (asprintf(&target, "%s/%s.gcron", TEMPLATEDIR, argv[1]) < 0) {
+ perror("asprintf");
+ return EXIT_FAILURE;
+ }
+
+ if (stat(target, &sb)) {
+ fprintf(stderr, "%s: %s\n", target, strerror(errno));
+ goto out_tgt;
+ }
+
+ if ((sb.st_mode & S_IFMT) != S_IFREG) {
+ fprintf(stderr, "%s: must be a regular file\n", target);
+ goto out_tgt;
+ }
+
+ if (asprintf(&linkname, "%s/%s", GCRONDIR, argv[1]) < 0) {
+ perror("asprintf");
+ goto out_tgt;
+ }
+
+ if (symlink(target, linkname)) {
+ fprintf(stderr, "creating symlink '%s' -> '%s: %s\n",
+ linkname, target, strerror(errno));
+ goto out;
+ }
+
+ ret = EXIT_SUCCESS;
+out:
+ free(linkname);
+out_tgt:
+ free(target);
+ return ret;
+}
+
+static command_t schedule = {
+ .cmd = "schedule",
+ .usage = "<name>",
+ .s_desc = "enable a gcrond service",
+ .l_desc = "This marks a gcrond service as enabled by creating a "
+ "symlink in " GCRONDIR " pointing to a template file in "
+ TEMPLATEDIR " with a .gcron extension.",
+ .run_cmd = cmd_schedule,
+};
+
+REGISTER_COMMAND(schedule)
diff --git a/cmd/service/service.8 b/cmd/service/service.8
index 6465db6..a897817 100644
--- a/cmd/service/service.8
+++ b/cmd/service/service.8
@@ -28,6 +28,12 @@ configuration directory, pointing to the service template file.
An optional argument can be supplied to parameterize the template.
.TP
+.BR schedule " " \fI<service>\fP
+If built with support for gcrond, enable a gcron service by creating a symlink
+in the gcrond configuration directory, pointing to the service file.
+
+The extension \fB.gcron\fP is automatically appended to the service name.
+.TP
.BR disable " " \fI<command>\fP " " \fI[arguments]\fP
Disable (but do not stop) a system service by removing the corresponding
symlink in the configuration directory.
@@ -35,8 +41,11 @@ symlink in the configuration directory.
If the service is parameterized, arguments have to be specified to disable
the desired service instance.
.TP
+.BR unschedule " " \fI<service>\fP
+If built with support for gcrond, disable a gcron service by removing the
+corresponding symlink in the gcron configuration directory.
+.TP
.BR dumpscript " " \fI<command>\fP " " \fI[arguments]\fP
-
Parse a service file from and produce a pseudo shell script containing the
exact commands executed when starting the service.
.SH AVAILABILITY
diff --git a/cmd/service/unschedule.c b/cmd/service/unschedule.c
new file mode 100644
index 0000000..aea6982
--- /dev/null
+++ b/cmd/service/unschedule.c
@@ -0,0 +1,82 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * Copyright (C) 2018 - David Oberhollenzer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "servicecmd.h"
+
+static int cmd_unschedule(int argc, char **argv)
+{
+ int ret = EXIT_FAILURE;
+ char *linkname, *ptr;
+ struct stat sb;
+
+ if (check_arguments(argv[0], argc, 2, 2))
+ return EXIT_FAILURE;
+
+ for (ptr = argv[1]; isalnum(*ptr) || *ptr == '_'; ++ptr)
+ ;
+
+ if (*ptr != '\0') {
+ fprintf(stderr, "Invalid service name '%s'\n", argv[1]);
+ tell_read_help(argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ if (asprintf(&linkname, "%s/%s.gcron", GCRONDIR, argv[1]) < 0) {
+ perror("asprintf");
+ return EXIT_FAILURE;
+ }
+
+ if (lstat(linkname, &sb)) {
+ fprintf(stderr, "lstat %s: %s\n", linkname, strerror(errno));
+ goto out;
+ }
+
+ if ((sb.st_mode & S_IFMT) != S_IFLNK) {
+ fprintf(stderr, "error: '%s' is not a symlink!", linkname);
+ goto out;
+ }
+
+ if (unlink(linkname)) {
+ fprintf(stderr, "removing %s: %s\n",
+ linkname, strerror(errno));
+ goto out;
+ }
+
+ ret = EXIT_SUCCESS;
+out:
+ free(linkname);
+ return ret;
+}
+
+static command_t unschedule = {
+ .cmd = "unschedule",
+ .usage = "<name>",
+ .s_desc = "disable a gcrond service",
+ .l_desc = "This disables a gcrond service by removing the coresponding "
+ "symlink in " GCRONDIR ".",
+ .run_cmd = cmd_unschedule,
+};
+
+REGISTER_COMMAND(unschedule)