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7baada47 | 1 | /* |
fc206fbe | 2 | * Copyright (C) 2006-2009 Kay Sievers <kay@vrfy.org> |
bb38678e SJR |
3 | * Copyright (C) 2009 Canonical Ltd. |
4 | * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com> | |
7baada47 | 5 | * |
55e9959b KS |
6 | * This program is free software: you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 2 of the License, or | |
9 | * (at your option) any later version. | |
7baada47 | 10 | * |
55e9959b KS |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
7baada47 KS |
18 | */ |
19 | ||
20 | #include <stdlib.h> | |
21 | #include <stddef.h> | |
22 | #include <string.h> | |
23 | #include <stdio.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
c2666405 | 26 | #include <getopt.h> |
0a6f50c0 | 27 | #include <poll.h> |
7baada47 KS |
28 | |
29 | #include "udev.h" | |
4e93793d | 30 | #include "util.h" |
7baada47 | 31 | |
7643ac9a | 32 | static void help(void) { |
5ac0162c LP |
33 | printf("%s settle OPTIONS\n\n" |
34 | "Wait for pending udev events.\n\n" | |
35 | " -h --help Show this help\n" | |
36 | " --version Show package version\n" | |
37 | " -t --timeout=SECONDS Maximum time to wait for events\n" | |
38 | " -E --exit-if-exists=FILE Stop waiting if file exists\n" | |
39 | , program_invocation_short_name); | |
7643ac9a ZJS |
40 | } |
41 | ||
9ec6e95b | 42 | static int adm_settle(struct udev *udev, int argc, char *argv[]) { |
912541b0 | 43 | static const struct option options[] = { |
7643ac9a | 44 | { "timeout", required_argument, NULL, 't' }, |
912541b0 | 45 | { "exit-if-exists", required_argument, NULL, 'E' }, |
7643ac9a | 46 | { "help", no_argument, NULL, 'h' }, |
2ac23519 LP |
47 | { "seq-start", required_argument, NULL, 's' }, /* removed */ |
48 | { "seq-end", required_argument, NULL, 'e' }, /* removed */ | |
49 | { "quiet", no_argument, NULL, 'q' }, /* removed */ | |
912541b0 KS |
50 | {} |
51 | }; | |
912541b0 KS |
52 | const char *exists = NULL; |
53 | unsigned int timeout = 120; | |
b49d9b50 | 54 | struct pollfd pfd[1] = { {.fd = -1}, }; |
14cb7336 KS |
55 | int c; |
56 | struct udev_queue *queue; | |
57 | int rc = EXIT_FAILURE; | |
912541b0 | 58 | |
2ac23519 | 59 | while ((c = getopt_long(argc, argv, "t:E:hs:e:q", options, NULL)) >= 0) { |
7643ac9a | 60 | switch (c) { |
2ac23519 | 61 | |
4e93793d YZ |
62 | case 't': { |
63 | int r; | |
64 | ||
65 | r = safe_atou(optarg, &timeout); | |
66 | if (r < 0) { | |
67 | fprintf(stderr, "Invalid timeout value '%s': %s\n", | |
68 | optarg, strerror(-r)); | |
69 | exit(EXIT_FAILURE); | |
70 | }; | |
912541b0 | 71 | break; |
7643ac9a | 72 | } |
2ac23519 | 73 | |
912541b0 KS |
74 | case 'E': |
75 | exists = optarg; | |
76 | break; | |
2ac23519 | 77 | |
912541b0 | 78 | case 'h': |
7643ac9a | 79 | help(); |
14cb7336 | 80 | return EXIT_SUCCESS; |
2ac23519 LP |
81 | |
82 | case 's': | |
83 | case 'e': | |
84 | case 'q': | |
85 | log_info("Option -%c no longer supported.", c); | |
86 | return EXIT_FAILURE; | |
87 | ||
7643ac9a | 88 | case '?': |
14cb7336 | 89 | return EXIT_FAILURE; |
2ac23519 | 90 | |
7643ac9a | 91 | default: |
6f285378 | 92 | assert_not_reached("Unknown argument"); |
912541b0 | 93 | } |
9ea28c55 | 94 | } |
7643ac9a ZJS |
95 | |
96 | if (optind < argc) { | |
97 | fprintf(stderr, "Extraneous argument: '%s'\n", argv[optind]); | |
14cb7336 | 98 | return EXIT_FAILURE; |
912541b0 KS |
99 | } |
100 | ||
912541b0 KS |
101 | /* guarantee that the udev daemon isn't pre-processing */ |
102 | if (getuid() == 0) { | |
103 | struct udev_ctrl *uctrl; | |
104 | ||
105 | uctrl = udev_ctrl_new(udev); | |
106 | if (uctrl != NULL) { | |
107 | if (udev_ctrl_send_ping(uctrl, timeout) < 0) { | |
9f6445e3 | 108 | log_debug("no connection to daemon"); |
912541b0 | 109 | udev_ctrl_unref(uctrl); |
14cb7336 | 110 | return EXIT_SUCCESS; |
912541b0 KS |
111 | } |
112 | udev_ctrl_unref(uctrl); | |
113 | } | |
114 | } | |
115 | ||
14cb7336 KS |
116 | queue = udev_queue_new(udev); |
117 | if (!queue) { | |
118 | log_error("unable to get udev queue"); | |
119 | return EXIT_FAILURE; | |
912541b0 KS |
120 | } |
121 | ||
14cb7336 KS |
122 | pfd[0].events = POLLIN; |
123 | pfd[0].fd = udev_queue_get_fd(queue); | |
124 | if (pfd[0].fd < 0) { | |
125 | log_debug("queue is empty, nothing to watch"); | |
126 | rc = EXIT_SUCCESS; | |
9ea28c55 KS |
127 | goto out; |
128 | } | |
912541b0 | 129 | |
9ea28c55 KS |
130 | for (;;) { |
131 | if (exists && access(exists, F_OK) >= 0) { | |
912541b0 KS |
132 | rc = EXIT_SUCCESS; |
133 | break; | |
134 | } | |
135 | ||
9ea28c55 | 136 | /* exit if queue is empty */ |
14cb7336 | 137 | if (udev_queue_get_queue_is_empty(queue)) { |
9ea28c55 KS |
138 | rc = EXIT_SUCCESS; |
139 | break; | |
912541b0 KS |
140 | } |
141 | ||
14cb7336 | 142 | /* wake up when queue is empty */ |
8a7a0c19 | 143 | if (poll(pfd, 1, MSEC_PER_SEC) > 0 && pfd[0].revents & POLLIN) |
14cb7336 | 144 | udev_queue_flush(queue); |
912541b0 | 145 | } |
9ea28c55 | 146 | |
ff2c503d | 147 | out: |
14cb7336 | 148 | udev_queue_unref(queue); |
912541b0 | 149 | return rc; |
7baada47 | 150 | } |
1985c76e KS |
151 | |
152 | const struct udevadm_cmd udevadm_settle = { | |
912541b0 KS |
153 | .name = "settle", |
154 | .cmd = adm_settle, | |
5ac0162c | 155 | .help = "Wait for pending udev events", |
1985c76e | 156 | }; |