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 69c6accf 2023-02-04 op #include <sha2.h>
 27 13b2bc37 2022-10-23 stsp #include <stdio.h>
 28 13b2bc37 2022-10-23 stsp #include <stdlib.h>
 29 13b2bc37 2022-10-23 stsp #include <string.h>
 30 13b2bc37 2022-10-23 stsp #include <unistd.h>
 31 13b2bc37 2022-10-23 stsp 
 32 13b2bc37 2022-10-23 stsp #include "got_error.h"
 33 13b2bc37 2022-10-23 stsp #include "got_serve.h"
 34 13b2bc37 2022-10-23 stsp 
 35 13b2bc37 2022-10-23 stsp #include "gotd.h"
 36 13b2bc37 2022-10-23 stsp 
 37 13b2bc37 2022-10-23 stsp static int chattygot;
 38 13b2bc37 2022-10-23 stsp 
 39 13b2bc37 2022-10-23 stsp __dead static void
 40 13b2bc37 2022-10-23 stsp usage()
 41 13b2bc37 2022-10-23 stsp {
 42 13b2bc37 2022-10-23 stsp 	fprintf(stderr, "usage: %s -c '%s|%s repository-path'\n",
 43 13b2bc37 2022-10-23 stsp 	    getprogname(), GOT_SERVE_CMD_SEND, GOT_SERVE_CMD_FETCH);
 44 13b2bc37 2022-10-23 stsp 	exit(1);
 45 13b2bc37 2022-10-23 stsp }
 46 13b2bc37 2022-10-23 stsp 
 47 13b2bc37 2022-10-23 stsp static const struct got_error *
 48 13b2bc37 2022-10-23 stsp apply_unveil(const char *unix_socket_path)
 49 13b2bc37 2022-10-23 stsp {
 50 13b2bc37 2022-10-23 stsp #ifdef PROFILE
 51 13b2bc37 2022-10-23 stsp 	if (unveil("gmon.out", "rwc") != 0)
 52 13b2bc37 2022-10-23 stsp 		return got_error_from_errno2("unveil", "gmon.out");
 53 13b2bc37 2022-10-23 stsp #endif
 54 13b2bc37 2022-10-23 stsp 	if (unveil(unix_socket_path, "w") != 0)
 55 13b2bc37 2022-10-23 stsp 		return got_error_from_errno2("unveil", unix_socket_path);
 56 13b2bc37 2022-10-23 stsp 
 57 13b2bc37 2022-10-23 stsp 	if (unveil(NULL, NULL) != 0)
 58 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("unveil");
 59 13b2bc37 2022-10-23 stsp 
 60 13b2bc37 2022-10-23 stsp 	return NULL;
 61 13b2bc37 2022-10-23 stsp }
 62 13b2bc37 2022-10-23 stsp 
 63 13b2bc37 2022-10-23 stsp int
 64 13b2bc37 2022-10-23 stsp main(int argc, char *argv[])
 65 13b2bc37 2022-10-23 stsp {
 66 13b2bc37 2022-10-23 stsp 	const struct got_error *error;
 67 8edf8796 2023-01-22 op 	const char *unix_socket_path;
 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 16e4df9d 2023-01-22 op 
 77 16e4df9d 2023-01-22 op 	unix_socket_path = getenv("GOTD_UNIX_SOCKET");
 78 16e4df9d 2023-01-22 op 	if (unix_socket_path == NULL)
 79 16e4df9d 2023-01-22 op 		unix_socket_path = GOTD_UNIX_SOCKET;
 80 16e4df9d 2023-01-22 op 
 81 16e4df9d 2023-01-22 op 	error = apply_unveil(unix_socket_path);
 82 16e4df9d 2023-01-22 op 	if (error)
 83 16e4df9d 2023-01-22 op 		goto done;
 84 16e4df9d 2023-01-22 op 
 85 bc854c7b 2022-10-23 stsp 	if (strcmp(argv[0], GOT_SERVE_CMD_SEND) == 0 ||
 86 bc854c7b 2022-10-23 stsp 	    strcmp(argv[0], GOT_SERVE_CMD_FETCH) == 0) {
 87 bc854c7b 2022-10-23 stsp 		if (argc != 2)
 88 bc854c7b 2022-10-23 stsp 			usage();
 89 bc854c7b 2022-10-23 stsp 		if (asprintf(&gitcmd, "%s %s", argv[0], argv[1]) == -1)
 90 bc854c7b 2022-10-23 stsp 			err(1, "asprintf");
 91 9aeaf23a 2023-01-22 op 		error = got_serve_parse_command(&command, &repo_path, gitcmd);
 92 bc854c7b 2022-10-23 stsp 	} else {
 93 9aeaf23a 2023-01-22 op 		if (argc != 3 || strcmp(argv[1], "-c") != 0)
 94 bc854c7b 2022-10-23 stsp 			usage();
 95 9aeaf23a 2023-01-22 op 		error = got_serve_parse_command(&command, &repo_path, argv[2]);
 96 bc854c7b 2022-10-23 stsp 	}
 97 9aeaf23a 2023-01-22 op 	if (error && error->code == GOT_ERR_BAD_PACKET)
 98 9aeaf23a 2023-01-22 op 		usage();
 99 9aeaf23a 2023-01-22 op 	if (error)
100 9aeaf23a 2023-01-22 op 		goto done;
101 13b2bc37 2022-10-23 stsp 
102 13b2bc37 2022-10-23 stsp 	if ((gotd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
103 13b2bc37 2022-10-23 stsp 		err(1, "socket");
104 13b2bc37 2022-10-23 stsp 
105 13b2bc37 2022-10-23 stsp 	memset(&sun, 0, sizeof(sun));
106 13b2bc37 2022-10-23 stsp 	sun.sun_family = AF_UNIX;
107 13b2bc37 2022-10-23 stsp 	if (strlcpy(sun.sun_path, unix_socket_path,
108 13b2bc37 2022-10-23 stsp 	    sizeof(sun.sun_path)) >= sizeof(sun.sun_path))
109 13b2bc37 2022-10-23 stsp 		errx(1, "gotd socket path too long");
110 13b2bc37 2022-10-23 stsp 	if (connect(gotd_sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
111 13b2bc37 2022-10-23 stsp 		err(1, "connect: %s", unix_socket_path);
112 13b2bc37 2022-10-23 stsp 
113 13b2bc37 2022-10-23 stsp #ifndef PROFILE
114 13b2bc37 2022-10-23 stsp 	if (pledge("stdio recvfd", NULL) == -1)
115 13b2bc37 2022-10-23 stsp 		err(1, "pledge");
116 13b2bc37 2022-10-23 stsp #endif
117 9aeaf23a 2023-01-22 op 	error = got_serve(STDIN_FILENO, STDOUT_FILENO, command, repo_path,
118 9aeaf23a 2023-01-22 op 	    gotd_sock, chattygot);
119 13b2bc37 2022-10-23 stsp done:
120 bc854c7b 2022-10-23 stsp 	free(gitcmd);
121 9aeaf23a 2023-01-22 op 	free(command);
122 9aeaf23a 2023-01-22 op 	free(repo_path);
123 13b2bc37 2022-10-23 stsp 	if (gotd_sock != -1)
124 13b2bc37 2022-10-23 stsp 		close(gotd_sock);
125 13b2bc37 2022-10-23 stsp 	if (error) {
126 13b2bc37 2022-10-23 stsp 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
127 13b2bc37 2022-10-23 stsp 		return 1;
128 13b2bc37 2022-10-23 stsp 	}
129 13b2bc37 2022-10-23 stsp 
130 13b2bc37 2022-10-23 stsp 	return 0;
131 13b2bc37 2022-10-23 stsp }