1 13b2bc37 2022-10-23 stsp /*
  2 13b2bc37 2022-10-23 stsp  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 13b2bc37 2022-10-23 stsp  *
  4 13b2bc37 2022-10-23 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 13b2bc37 2022-10-23 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 13b2bc37 2022-10-23 stsp  * copyright notice and this permission notice appear in all copies.
  7 13b2bc37 2022-10-23 stsp  *
  8 13b2bc37 2022-10-23 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 13b2bc37 2022-10-23 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 13b2bc37 2022-10-23 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 13b2bc37 2022-10-23 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 13b2bc37 2022-10-23 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 13b2bc37 2022-10-23 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 13b2bc37 2022-10-23 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 13b2bc37 2022-10-23 stsp  */
 16 13b2bc37 2022-10-23 stsp 
 17 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
 18 13b2bc37 2022-10-23 stsp #include <sys/socket.h>
 19 13b2bc37 2022-10-23 stsp #include <sys/un.h>
 20 13b2bc37 2022-10-23 stsp 
 21 13b2bc37 2022-10-23 stsp #include <err.h>
 22 13b2bc37 2022-10-23 stsp #include <event.h>
 23 13b2bc37 2022-10-23 stsp #include <imsg.h>
 24 13b2bc37 2022-10-23 stsp #include <limits.h>
 25 13b2bc37 2022-10-23 stsp #include <sha1.h>
 26 13b2bc37 2022-10-23 stsp #include <stdio.h>
 27 13b2bc37 2022-10-23 stsp #include <stdlib.h>
 28 13b2bc37 2022-10-23 stsp #include <string.h>
 29 13b2bc37 2022-10-23 stsp #include <unistd.h>
 30 13b2bc37 2022-10-23 stsp 
 31 13b2bc37 2022-10-23 stsp #include "got_error.h"
 32 13b2bc37 2022-10-23 stsp #include "got_serve.h"
 33 13b2bc37 2022-10-23 stsp 
 34 13b2bc37 2022-10-23 stsp #include "gotd.h"
 35 13b2bc37 2022-10-23 stsp 
 36 13b2bc37 2022-10-23 stsp static int chattygot;
 37 13b2bc37 2022-10-23 stsp 
 38 13b2bc37 2022-10-23 stsp __dead static void
 39 13b2bc37 2022-10-23 stsp usage()
 40 13b2bc37 2022-10-23 stsp {
 41 13b2bc37 2022-10-23 stsp 	fprintf(stderr, "usage: %s -c '%s|%s repository-path'\n",
 42 13b2bc37 2022-10-23 stsp 	    getprogname(), GOT_SERVE_CMD_SEND, GOT_SERVE_CMD_FETCH);
 43 13b2bc37 2022-10-23 stsp 	exit(1);
 44 13b2bc37 2022-10-23 stsp }
 45 13b2bc37 2022-10-23 stsp 
 46 13b2bc37 2022-10-23 stsp static const struct got_error *
 47 13b2bc37 2022-10-23 stsp apply_unveil(const char *unix_socket_path)
 48 13b2bc37 2022-10-23 stsp {
 49 13b2bc37 2022-10-23 stsp #ifdef PROFILE
 50 13b2bc37 2022-10-23 stsp 	if (unveil("gmon.out", "rwc") != 0)
 51 13b2bc37 2022-10-23 stsp 		return got_error_from_errno2("unveil", "gmon.out");
 52 13b2bc37 2022-10-23 stsp #endif
 53 13b2bc37 2022-10-23 stsp 	if (unveil(unix_socket_path, "w") != 0)
 54 13b2bc37 2022-10-23 stsp 		return got_error_from_errno2("unveil", unix_socket_path);
 55 13b2bc37 2022-10-23 stsp 
 56 13b2bc37 2022-10-23 stsp 	if (unveil(NULL, NULL) != 0)
 57 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("unveil");
 58 13b2bc37 2022-10-23 stsp 
 59 13b2bc37 2022-10-23 stsp 	return NULL;
 60 13b2bc37 2022-10-23 stsp }
 61 13b2bc37 2022-10-23 stsp 
 62 13b2bc37 2022-10-23 stsp int
 63 13b2bc37 2022-10-23 stsp main(int argc, char *argv[])
 64 13b2bc37 2022-10-23 stsp {
 65 13b2bc37 2022-10-23 stsp 	const struct got_error *error;
 66 13b2bc37 2022-10-23 stsp 	char unix_socket_path[PATH_MAX];
 67 13b2bc37 2022-10-23 stsp 	char *unix_socket_path_env = getenv("GOTD_UNIX_SOCKET");
 68 13b2bc37 2022-10-23 stsp 	int gotd_sock = -1;
 69 13b2bc37 2022-10-23 stsp 	struct sockaddr_un	 sun;
 70 9aeaf23a 2023-01-22 op 	char *gitcmd = NULL, *command = NULL, *repo_path = NULL;
 71 13b2bc37 2022-10-23 stsp 
 72 13b2bc37 2022-10-23 stsp #ifndef PROFILE
 73 13b2bc37 2022-10-23 stsp 	if (pledge("stdio recvfd unix unveil", NULL) == -1)
 74 13b2bc37 2022-10-23 stsp 		err(1, "pledge");
 75 13b2bc37 2022-10-23 stsp #endif
 76 bc854c7b 2022-10-23 stsp 	if (strcmp(argv[0], GOT_SERVE_CMD_SEND) == 0 ||
 77 bc854c7b 2022-10-23 stsp 	    strcmp(argv[0], GOT_SERVE_CMD_FETCH) == 0) {
 78 bc854c7b 2022-10-23 stsp 		if (argc != 2)
 79 bc854c7b 2022-10-23 stsp 			usage();
 80 bc854c7b 2022-10-23 stsp 		if (asprintf(&gitcmd, "%s %s", argv[0], argv[1]) == -1)
 81 bc854c7b 2022-10-23 stsp 			err(1, "asprintf");
 82 9aeaf23a 2023-01-22 op 		error = got_serve_parse_command(&command, &repo_path, gitcmd);
 83 bc854c7b 2022-10-23 stsp 	} else {
 84 9aeaf23a 2023-01-22 op 		if (argc != 3 || strcmp(argv[1], "-c") != 0)
 85 bc854c7b 2022-10-23 stsp 			usage();
 86 9aeaf23a 2023-01-22 op 		error = got_serve_parse_command(&command, &repo_path, argv[2]);
 87 bc854c7b 2022-10-23 stsp 	}
 88 9aeaf23a 2023-01-22 op 	if (error && error->code == GOT_ERR_BAD_PACKET)
 89 9aeaf23a 2023-01-22 op 		usage();
 90 9aeaf23a 2023-01-22 op 	if (error)
 91 9aeaf23a 2023-01-22 op 		goto done;
 92 13b2bc37 2022-10-23 stsp 
 93 13b2bc37 2022-10-23 stsp 	if (unix_socket_path_env) {
 94 13b2bc37 2022-10-23 stsp 		if (strlcpy(unix_socket_path, unix_socket_path_env,
 95 758dc042 2022-11-06 stsp 		    sizeof(unix_socket_path)) >= sizeof(unix_socket_path))
 96 13b2bc37 2022-10-23 stsp 			errx(1, "gotd socket path too long");
 97 13b2bc37 2022-10-23 stsp 	} else {
 98 13b2bc37 2022-10-23 stsp 		strlcpy(unix_socket_path, GOTD_UNIX_SOCKET,
 99 13b2bc37 2022-10-23 stsp 		    sizeof(unix_socket_path));
100 13b2bc37 2022-10-23 stsp 	}
101 13b2bc37 2022-10-23 stsp 
102 13b2bc37 2022-10-23 stsp 	error = apply_unveil(unix_socket_path);
103 13b2bc37 2022-10-23 stsp 	if (error)
104 13b2bc37 2022-10-23 stsp 		goto done;
105 13b2bc37 2022-10-23 stsp 
106 13b2bc37 2022-10-23 stsp #ifndef PROFILE
107 13b2bc37 2022-10-23 stsp 	if (pledge("stdio recvfd unix", NULL) == -1)
108 13b2bc37 2022-10-23 stsp 		err(1, "pledge");
109 13b2bc37 2022-10-23 stsp #endif
110 13b2bc37 2022-10-23 stsp 	if ((gotd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
111 13b2bc37 2022-10-23 stsp 		err(1, "socket");
112 13b2bc37 2022-10-23 stsp 
113 13b2bc37 2022-10-23 stsp 	memset(&sun, 0, sizeof(sun));
114 13b2bc37 2022-10-23 stsp 	sun.sun_family = AF_UNIX;
115 13b2bc37 2022-10-23 stsp 	if (strlcpy(sun.sun_path, unix_socket_path,
116 13b2bc37 2022-10-23 stsp 	    sizeof(sun.sun_path)) >= sizeof(sun.sun_path))
117 13b2bc37 2022-10-23 stsp 		errx(1, "gotd socket path too long");
118 13b2bc37 2022-10-23 stsp 	if (connect(gotd_sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
119 13b2bc37 2022-10-23 stsp 		err(1, "connect: %s", unix_socket_path);
120 13b2bc37 2022-10-23 stsp 
121 13b2bc37 2022-10-23 stsp #ifndef PROFILE
122 13b2bc37 2022-10-23 stsp 	if (pledge("stdio recvfd", NULL) == -1)
123 13b2bc37 2022-10-23 stsp 		err(1, "pledge");
124 13b2bc37 2022-10-23 stsp #endif
125 9aeaf23a 2023-01-22 op 	error = got_serve(STDIN_FILENO, STDOUT_FILENO, command, repo_path,
126 9aeaf23a 2023-01-22 op 	    gotd_sock, chattygot);
127 13b2bc37 2022-10-23 stsp done:
128 bc854c7b 2022-10-23 stsp 	free(gitcmd);
129 9aeaf23a 2023-01-22 op 	free(command);
130 9aeaf23a 2023-01-22 op 	free(repo_path);
131 13b2bc37 2022-10-23 stsp 	if (gotd_sock != -1)
132 13b2bc37 2022-10-23 stsp 		close(gotd_sock);
133 13b2bc37 2022-10-23 stsp 	if (error) {
134 13b2bc37 2022-10-23 stsp 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
135 13b2bc37 2022-10-23 stsp 		return 1;
136 13b2bc37 2022-10-23 stsp 	}
137 13b2bc37 2022-10-23 stsp 
138 13b2bc37 2022-10-23 stsp 	return 0;
139 13b2bc37 2022-10-23 stsp }