diff options
Diffstat (limited to 'src/grp-udev/udevadm/udevadm-control.c')
| -rw-r--r-- | src/grp-udev/udevadm/udevadm-control.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/grp-udev/udevadm/udevadm-control.c b/src/grp-udev/udevadm/udevadm-control.c new file mode 100644 index 0000000000..415da614f4 --- /dev/null +++ b/src/grp-udev/udevadm/udevadm-control.c @@ -0,0 +1,172 @@ +/* + * Copyright (C) 2005-2011 Kay Sievers <kay@vrfy.org> + * + * 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 "systemd-basic/time-util.h" +#include "systemd-shared/udev-util.h" +#include "udev.h" + +static void print_help(void) { + printf("%s control COMMAND\n\n" + "Control the udev daemon.\n\n" + " -h --help Show this help\n" + " --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" + " --timeout=SECONDS Maximum time to block for a reply\n" + , program_invocation_short_name); +} + +static int adm_control(struct udev *udev, int argc, char *argv[]) { + _cleanup_udev_ctrl_unref_ struct udev_ctrl *uctrl = NULL; + int timeout = 60; + int rc = 1, c; + + 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' }, + { "timeout", required_argument, NULL, 't' }, + { "help", no_argument, NULL, 'h' }, + {} + }; + + if (getuid() != 0) { + log_error("root privileges required"); + return 1; + } + + uctrl = udev_ctrl_new(udev); + if (uctrl == NULL) + return 2; + + while ((c = getopt_long(argc, argv, "el:sSRp:m:h", options, NULL)) >= 0) + switch (c) { + case 'e': + if (udev_ctrl_send_exit(uctrl, timeout) < 0) + rc = 2; + else + rc = 0; + break; + case 'l': { + int i; + + i = util_log_priority(optarg); + if (i < 0) { + log_error("invalid number '%s'", optarg); + return rc; + } + if (udev_ctrl_send_set_log_level(uctrl, util_log_priority(optarg), timeout) < 0) + rc = 2; + else + rc = 0; + break; + } + case 's': + if (udev_ctrl_send_stop_exec_queue(uctrl, timeout) < 0) + rc = 2; + else + rc = 0; + break; + case 'S': + if (udev_ctrl_send_start_exec_queue(uctrl, timeout) < 0) + rc = 2; + else + rc = 0; + break; + case 'R': + if (udev_ctrl_send_reload(uctrl, timeout) < 0) + rc = 2; + else + rc = 0; + break; + case 'p': + if (strchr(optarg, '=') == NULL) { + log_error("expect <KEY>=<value> instead of '%s'", optarg); + return rc; + } + if (udev_ctrl_send_set_env(uctrl, optarg, timeout) < 0) + rc = 2; + else + rc = 0; + break; + case 'm': { + char *endp; + int i; + + i = strtoul(optarg, &endp, 0); + if (endp[0] != '\0' || i < 1) { + log_error("invalid number '%s'", optarg); + return rc; + } + if (udev_ctrl_send_set_children_max(uctrl, i, timeout) < 0) + rc = 2; + else + rc = 0; + break; + } + case 't': { + usec_t s; + int seconds; + int r; + + r = parse_sec(optarg, &s); + if (r < 0) + return log_error_errno(r, "Failed to parse timeout value '%s'.", optarg); + + if (((s + USEC_PER_SEC - 1) / USEC_PER_SEC) > INT_MAX) + log_error("Timeout value is out of range."); + else { + seconds = s != USEC_INFINITY ? (int) ((s + USEC_PER_SEC - 1) / USEC_PER_SEC) : INT_MAX; + timeout = seconds; + rc = 0; + } + break; + } + case 'h': + print_help(); + rc = 0; + break; + } + + if (optind < argc) + log_error("Extraneous argument: %s", argv[optind]); + else if (optind == 1) + log_error("Option missing"); + return rc; +} + +const struct udevadm_cmd udevadm_control = { + .name = "control", + .cmd = adm_control, + .help = "Control the udev daemon", +}; |