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 <sys/types.h>
18 #include <sys/socket.h>
19 #include <sys/uio.h>
20 #include <sys/un.h>
21 
22 #include <err.h>
23 #include <event.h>
24 #include <stdint.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <syslog.h>
29 #include <unistd.h>
30 #include <imsg.h>
31 
32 #include "ctl_parser.h"
33 #include "kamid.h"
34 #include "log.h"
35 
36 __dead void	 usage(void);
37 
38 struct imsgbuf	*ibuf;
39 
40 __dead void
41 usage(void)
42 {
43 	/*
44 	 * XXX: this will print `kamid' if compat/getprogname.c is
45 	 * used.
46 	 */
47 	fprintf(stderr, "usage: %s [-s socket] command [argument ...]\n",
48 	    getprogname());
49 	exit(1);
50 }
51 
52 int
53 main(int argc, char **argv)
54 {
55 	struct sockaddr_un	 sun;
56 	struct parse_result	*res;
57 	struct imsg		 imsg;
58 	int			 ctl_sock;
59 	int			 done = 0;
60 	int			 n, verbose = 0;
61 	int			 ch;
62 	const char		*sockname;
63 
64 	log_init(1, LOG_DAEMON); /* Log to stderr. */
65 
66 	sockname = KD_SOCKET;
67 	while ((ch = getopt(argc, argv, "s:")) != -1) {
68 		switch (ch) {
69 		case 's':
70 			sockname = optarg;
71 			break;
72 		default:
73 			usage();
74 		}
75 	}
76 	argc -= optind;
77 	argv += optind;
78 
79 	/* parse command line */
80 	if ((res = parse(argc, argv)) == NULL)
81 		exit(1);
82 
83 	/* connect to control socket */
84 	if ((ctl_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
85 		err(1, "socket");
86 
87 	memset(&sun, 0, sizeof(sun));
88 	sun.sun_family = AF_UNIX;
89 	strlcpy(sun.sun_path, sockname, sizeof(sun.sun_path));
90 
91 	if (connect(ctl_sock, (struct sockaddr*)&sun, sizeof(sun)) == -1)
92 		err(1, "connect: %s", sockname);
93 
94 #ifdef __OpenBSD__
95 	if (pledge("stdio", NULL) == -1)
96 		err(1, "pledge");
97 #endif
98 
99 	if ((ibuf = calloc(1, sizeof(*ibuf))) == NULL)
100 		err(1, NULL);
101 	imsg_init(ibuf, ctl_sock);
102 	done = 0;
103 
104 	/* process user request */
105 	switch (res->action) {
106 	case LOG_VERBOSE:
107 		verbose = 1;
108 		/* fallthrough */
109 	case LOG_BRIEF:
110 		imsg_compose(ibuf, IMSG_CTL_LOG_VERBOSE, 0, 0, -1,
111 		    &verbose, sizeof(verbose));
112 		puts("logging request sent.");
113 		done = 1;
114 		break;
115 	case RELOAD:
116 		imsg_compose(ibuf, IMSG_CTL_RELOAD, 0, 0, -1, NULL, 0);
117 		puts("reload request sent.");
118 		done = 1;
119 		break;
120 	default:
121 		usage();
122 	}
123 
124 	imsg_flush(ibuf);
125 
126 	/*
127 	 * Later we may add commands which requires a response.
128 	 */
129 	while (!done) {
130 		if ((n = imsg_get(ibuf, &imsg)) == -1)
131 			errx(1, "imsg_get error");
132 		if (n == 0)
133 			break;
134 
135 		switch (res->action) {
136 		default:
137 			break;
138 		}
139 		imsg_free(&imsg);
140 	}
141 	close(ctl_sock);
142 	free(ibuf);
143 
144 	return 0;
145 }