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