1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "compat.h"
18 
19 #include <sys/socket.h>
20 #include <sys/un.h>
21 
22 #include <err.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <syslog.h>
27 #include <unistd.h>
28 
29 #include "ctl_parser.h"
30 #include "kamid.h"
31 #include "log.h"
32 
33 __dead void	 usage(void);
34 
35 struct imsgbuf	*ibuf;
36 
37 __dead void
38 usage(void)
39 {
40 	/*
41 	 * XXX: this will print `kamid' if compat/getprogname.c is
42 	 * used.
43 	 */
44 	fprintf(stderr, "usage: %s [-s socket] command [argument ...]\n",
45 	    getprogname());
46 	exit(1);
47 }
48 
49 int
50 main(int argc, char **argv)
51 {
52 	struct sockaddr_un	 sun;
53 	struct parse_result	*res;
54 	struct imsg		 imsg;
55 	int			 ctl_sock;
56 	int			 done = 0;
57 	int			 n, verbose = 0;
58 	int			 ch;
59 	const char		*sockname;
60 
61 	log_init(1, LOG_DAEMON); /* Log to stderr. */
62 
63 	sockname = KD_SOCKET;
64 	while ((ch = getopt(argc, argv, "s:")) != -1) {
65 		switch (ch) {
66 		case 's':
67 			sockname = optarg;
68 			break;
69 		default:
70 			usage();
71 		}
72 	}
73 	argc -= optind;
74 	argv += optind;
75 
76 	/* parse command line */
77 	if ((res = parse(argc, argv)) == NULL)
78 		exit(1);
79 
80 	/* connect to control socket */
81 	if ((ctl_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
82 		err(1, "socket");
83 
84 	memset(&sun, 0, sizeof(sun));
85 	sun.sun_family = AF_UNIX;
86 	strlcpy(sun.sun_path, sockname, sizeof(sun.sun_path));
87 
88 	if (connect(ctl_sock, (struct sockaddr*)&sun, sizeof(sun)) == -1)
89 		err(1, "connect: %s", sockname);
90 
91 #ifdef __OpenBSD__
92 	if (pledge("stdio", NULL) == -1)
93 		err(1, "pledge");
94 #endif
95 
96 	if ((ibuf = calloc(1, sizeof(*ibuf))) == NULL)
97 		err(1, NULL);
98 	imsg_init(ibuf, ctl_sock);
99 	done = 0;
100 
101 	/* process user request */
102 	switch (res->action) {
103 	case LOG_VERBOSE:
104 		verbose = 1;
105 		/* fallthrough */
106 	case LOG_BRIEF:
107 		imsg_compose(ibuf, IMSG_CTL_LOG_VERBOSE, 0, 0, -1,
108 		    &verbose, sizeof(verbose));
109 		puts("logging request sent.");
110 		done = 1;
111 		break;
112 	case RELOAD:
113 		imsg_compose(ibuf, IMSG_CTL_RELOAD, 0, 0, -1, NULL, 0);
114 		puts("reload request sent.");
115 		done = 1;
116 		break;
117 	default:
118 		usage();
119 	}
120 
121 	imsg_flush(ibuf);
122 
123 	/*
124 	 * Later we may add commands which requires a response.
125 	 */
126 	while (!done) {
127 		if ((n = imsg_get(ibuf, &imsg)) == -1)
128 			errx(1, "imsg_get error");
129 		if (n == 0)
130 			break;
131 
132 		switch (res->action) {
133 		default:
134 			break;
135 		}
136 		imsg_free(&imsg);
137 	}
138 	close(ctl_sock);
139 	free(ibuf);
140 
141 	return 0;
142 }