diff options
Diffstat (limited to 'src/udev/udevadm-control.c')
| -rw-r--r-- | src/udev/udevadm-control.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/udev/udevadm-control.c b/src/udev/udevadm-control.c new file mode 100644 index 0000000..7cfc4c9 --- /dev/null +++ b/src/udev/udevadm-control.c @@ -0,0 +1,169 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * 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 2 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. + */ + +#include <errno.h> +#include <getopt.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "parse-util.h" +#include "process-util.h" +#include "syslog-util.h" +#include "time-util.h" +#include "udevadm.h" +#include "udev-ctrl.h" +#include "util.h" +#include "virt.h" + +static int help(void) { + printf("%s control OPTION\n\n" + "Control the udev daemon.\n\n" + " -h --help Show this help\n" + " -V --version Show package version\n" + " -e --exit Instruct the daemon to cleanup and exit\n" + " -l --log-priority=LEVEL Set the udev log level for the daemon\n" + " -s --stop-exec-queue Do not execute events, queue only\n" + " -S --start-exec-queue Execute events, flush queue\n" + " -R --reload Reload rules and databases\n" + " -p --property=KEY=VALUE Set a global property for all events\n" + " -m --children-max=N Maximum number of children\n" + " --ping Wait for udev to respond to a ping message\n" + " -t --timeout=SECONDS Maximum time to block for a reply\n" + , program_invocation_short_name); + + return 0; +} + +int control_main(int argc, char *argv[], void *userdata) { + _cleanup_(udev_ctrl_unrefp) struct udev_ctrl *uctrl = NULL; + usec_t timeout = 60 * USEC_PER_SEC; + int c, r; + + enum { + ARG_PING = 0x100, + }; + + static const struct option options[] = { + { "exit", no_argument, NULL, 'e' }, + { "log-priority", required_argument, NULL, 'l' }, + { "stop-exec-queue", no_argument, NULL, 's' }, + { "start-exec-queue", no_argument, NULL, 'S' }, + { "reload", no_argument, NULL, 'R' }, + { "reload-rules", no_argument, NULL, 'R' }, /* alias for -R */ + { "property", required_argument, NULL, 'p' }, + { "env", required_argument, NULL, 'p' }, /* alias for -p */ + { "children-max", required_argument, NULL, 'm' }, + { "ping", no_argument, NULL, ARG_PING }, + { "timeout", required_argument, NULL, 't' }, + { "version", no_argument, NULL, 'V' }, + { "help", no_argument, NULL, 'h' }, + {} + }; + + r = must_be_root(); + if (r < 0) + return r; + + if (running_in_chroot() > 0) { + log_info("Running in chroot, ignoring request."); + return 0; + } + + if (argc <= 1) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "This command expects one or more options."); + + uctrl = udev_ctrl_new(); + if (!uctrl) + return log_oom(); + + while ((c = getopt_long(argc, argv, "el:sSRp:m:t:Vh", options, NULL)) >= 0) + switch (c) { + case 'e': + r = udev_ctrl_send_exit(uctrl, timeout); + if (r < 0) + return r; + break; + case 'l': + r = log_level_from_string(optarg); + if (r < 0) + return log_error_errno(r, "Failed to parse log priority '%s': %m", optarg); + + r = udev_ctrl_send_set_log_level(uctrl, r, timeout); + if (r < 0) + return r; + break; + case 's': + r = udev_ctrl_send_stop_exec_queue(uctrl, timeout); + if (r < 0) + return r; + break; + case 'S': + r = udev_ctrl_send_start_exec_queue(uctrl, timeout); + if (r < 0) + return r; + break; + case 'R': + r = udev_ctrl_send_reload(uctrl, timeout); + if (r < 0) + return r; + break; + case 'p': + if (!strchr(optarg, '=')) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "expect <KEY>=<value> instead of '%s'", optarg); + + r = udev_ctrl_send_set_env(uctrl, optarg, timeout); + if (r < 0) + return r; + break; + case 'm': { + unsigned i; + + r = safe_atou(optarg, &i); + if (r < 0) + return log_error_errno(r, "Failed to parse maximum number of events '%s': %m", optarg); + + r = udev_ctrl_send_set_children_max(uctrl, i, timeout); + if (r < 0) + return r; + break; + } + case ARG_PING: + r = udev_ctrl_send_ping(uctrl, timeout); + if (r < 0) + return log_error_errno(r, "Failed to connect to udev daemon: %m"); + break; + case 't': + r = parse_sec(optarg, &timeout); + if (r < 0) + return log_error_errno(r, "Failed to parse timeout value '%s': %m", optarg); + break; + case 'V': + return print_version(); + case 'h': + return help(); + case '?': + return -EINVAL; + default: + assert_not_reached("Unknown option."); + } + + if (optind < argc) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Extraneous argument: %s", argv[optind]); + + return 0; +} |