Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 239 insertions, 0 deletions

diff --git a/src/udev/udevadm-control.c b/src/udev/udevadm-control.c
new file mode 100644
index 0000000..64615f5
--- /dev/null
+++ b/src/udev/udevadm-control.c
@@ -0,0 +1,239 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * 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 "static-destruct.h"
+#include "strv.h"
+#include "syslog-util.h"
+#include "time-util.h"
+#include "udevadm.h"
+#include "udev-ctrl.h"
+#include "virt.h"
+
+static char **arg_env = NULL;
+static usec_t arg_timeout = 60 * USEC_PER_SEC;
+static bool arg_ping = false;
+static bool arg_reload = false;
+static bool arg_exit = false;
+static int arg_max_children = -1;
+static int arg_log_level = -1;
+static int arg_start_exec_queue = -1;
+
+STATIC_DESTRUCTOR_REGISTER(arg_env, strv_freep);
+
+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-level=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;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+        enum {
+                ARG_PING = 0x100,
+        };
+
+        static const struct option options[] = {
+                { "exit",             no_argument,       NULL, 'e'      },
+                { "log-level",        required_argument, NULL, 'l'      },
+                { "log-priority",     required_argument, NULL, 'l'      }, /* for backward compatibility */
+                { "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'      },
+                {}
+        };
+
+        int c, r;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        if (argc <= 1)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "This command expects one or more options.");
+
+        while ((c = getopt_long(argc, argv, "el:sSRp:m:t:Vh", options, NULL)) >= 0)
+                switch (c) {
+
+                case 'e':
+                        arg_exit = true;
+                        break;
+
+                case 'l':
+                        arg_log_level = log_level_from_string(optarg);
+                        if (arg_log_level < 0)
+                                return log_error_errno(arg_log_level, "Failed to parse log level '%s': %m", optarg);
+                        break;
+
+                case 's':
+                        arg_start_exec_queue = false;
+                        break;
+
+                case 'S':
+                        arg_start_exec_queue = true;
+                        break;
+
+                case 'R':
+                        arg_reload = true;
+                        break;
+
+                case 'p':
+                        if (!strchr(optarg, '='))
+                                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "expect <KEY>=<value> instead of '%s'", optarg);
+
+                        r = strv_extend(&arg_env, optarg);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to extend environment: %m");
+
+                        break;
+
+                case 'm': {
+                        unsigned i;
+                        r = safe_atou(optarg, &i);
+                        if (r < 0)
+                                return log_error_errno(r, "Failed to parse maximum number of children '%s': %m", optarg);
+                        arg_max_children = i;
+                        break;
+                }
+
+                case ARG_PING:
+                        arg_ping = true;
+                        break;
+
+                case 't':
+                        r = parse_sec(optarg, &arg_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();
+                }
+
+        if (optind < argc)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+                                       "Extraneous argument: %s", argv[optind]);
+
+        return 1;
+}
+
+int control_main(int argc, char *argv[], void *userdata) {
+        _cleanup_(udev_ctrl_unrefp) UdevCtrl *uctrl = NULL;
+        int r;
+
+        if (running_in_chroot() > 0) {
+                log_info("Running in chroot, ignoring request.");
+                return 0;
+        }
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                return r;
+
+        r = udev_ctrl_new(&uctrl);
+        if (r < 0)
+                return log_error_errno(r, "Failed to initialize udev control: %m");
+
+        if (arg_exit) {
+                r = udev_ctrl_send_exit(uctrl);
+                if (r < 0)
+                       return log_error_errno(r, "Failed to send exit request: %m");
+                return 0;
+        }
+
+        if (arg_log_level >= 0) {
+                r = udev_ctrl_send_set_log_level(uctrl, arg_log_level);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to send request to set log level: %m");
+        }
+
+        if (arg_start_exec_queue == false) {
+                r = udev_ctrl_send_stop_exec_queue(uctrl);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to send request to stop exec queue: %m");
+        }
+
+        if (arg_start_exec_queue == true) {
+                r = udev_ctrl_send_start_exec_queue(uctrl);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to send request to start exec queue: %m");
+        }
+
+        if (arg_reload) {
+                r = udev_ctrl_send_reload(uctrl);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to send reload request: %m");
+        }
+
+        STRV_FOREACH(env, arg_env) {
+                r = udev_ctrl_send_set_env(uctrl, *env);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to send request to update environment: %m");
+        }
+
+        if (arg_max_children >= 0) {
+                r = udev_ctrl_send_set_children_max(uctrl, arg_max_children);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to send request to set number of children: %m");
+        }
+
+        if (arg_ping) {
+                r = udev_ctrl_send_ping(uctrl);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to send a ping message: %m");
+        }
+
+        r = udev_ctrl_wait(uctrl, arg_timeout);
+        if (r < 0)
+                return log_error_errno(r, "Failed to wait for daemon to reply: %m");
+
+        return 0;
+}