1 3efd8e31 2022-10-23 thomas /*
  2 3efd8e31 2022-10-23 thomas  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
  3 3efd8e31 2022-10-23 thomas  *
  4 3efd8e31 2022-10-23 thomas  * Permission to use, copy, modify, and distribute this software for any
  5 3efd8e31 2022-10-23 thomas  * purpose with or without fee is hereby granted, provided that the above
  6 3efd8e31 2022-10-23 thomas  * copyright notice and this permission notice appear in all copies.
  7 3efd8e31 2022-10-23 thomas  *
  8 3efd8e31 2022-10-23 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 3efd8e31 2022-10-23 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 3efd8e31 2022-10-23 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 3efd8e31 2022-10-23 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 3efd8e31 2022-10-23 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 3efd8e31 2022-10-23 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 3efd8e31 2022-10-23 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 3efd8e31 2022-10-23 thomas  */
 16 3efd8e31 2022-10-23 thomas 
 17 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
 18 3efd8e31 2022-10-23 thomas #include <sys/socket.h>
 19 3efd8e31 2022-10-23 thomas #include <sys/un.h>
 20 3efd8e31 2022-10-23 thomas 
 21 3efd8e31 2022-10-23 thomas #include <err.h>
 22 3efd8e31 2022-10-23 thomas #include <event.h>
 23 3efd8e31 2022-10-23 thomas #include <imsg.h>
 24 3efd8e31 2022-10-23 thomas #include <limits.h>
 25 3efd8e31 2022-10-23 thomas #include <stdio.h>
 26 3efd8e31 2022-10-23 thomas #include <stdlib.h>
 27 3efd8e31 2022-10-23 thomas #include <string.h>
 28 3efd8e31 2022-10-23 thomas #include <unistd.h>
 29 3efd8e31 2022-10-23 thomas 
 30 3efd8e31 2022-10-23 thomas #include "got_error.h"
 31 3efd8e31 2022-10-23 thomas #include "got_serve.h"
 32 3efd8e31 2022-10-23 thomas 
 33 3efd8e31 2022-10-23 thomas #include "gotd.h"
 34 3efd8e31 2022-10-23 thomas 
 35 3efd8e31 2022-10-23 thomas static int chattygot;
 36 3efd8e31 2022-10-23 thomas 
 37 3efd8e31 2022-10-23 thomas __dead static void
 38 96d694ac 2023-02-17 thomas usage(void)
 39 3efd8e31 2022-10-23 thomas {
 40 3efd8e31 2022-10-23 thomas 	fprintf(stderr, "usage: %s -c '%s|%s repository-path'\n",
 41 3efd8e31 2022-10-23 thomas 	    getprogname(), GOT_SERVE_CMD_SEND, GOT_SERVE_CMD_FETCH);
 42 3efd8e31 2022-10-23 thomas 	exit(1);
 43 3efd8e31 2022-10-23 thomas }
 44 3efd8e31 2022-10-23 thomas 
 45 3efd8e31 2022-10-23 thomas static const struct got_error *
 46 3efd8e31 2022-10-23 thomas apply_unveil(const char *unix_socket_path)
 47 3efd8e31 2022-10-23 thomas {
 48 3efd8e31 2022-10-23 thomas #ifdef PROFILE
 49 3efd8e31 2022-10-23 thomas 	if (unveil("gmon.out", "rwc") != 0)
 50 3efd8e31 2022-10-23 thomas 		return got_error_from_errno2("unveil", "gmon.out");
 51 3efd8e31 2022-10-23 thomas #endif
 52 3efd8e31 2022-10-23 thomas 	if (unveil(unix_socket_path, "w") != 0)
 53 3efd8e31 2022-10-23 thomas 		return got_error_from_errno2("unveil", unix_socket_path);
 54 3efd8e31 2022-10-23 thomas 
 55 3efd8e31 2022-10-23 thomas 	if (unveil(NULL, NULL) != 0)
 56 3efd8e31 2022-10-23 thomas 		return got_error_from_errno("unveil");
 57 3efd8e31 2022-10-23 thomas 
 58 3efd8e31 2022-10-23 thomas 	return NULL;
 59 3efd8e31 2022-10-23 thomas }
 60 3efd8e31 2022-10-23 thomas 
 61 3efd8e31 2022-10-23 thomas int
 62 3efd8e31 2022-10-23 thomas main(int argc, char *argv[])
 63 3efd8e31 2022-10-23 thomas {
 64 3efd8e31 2022-10-23 thomas 	const struct got_error *error;
 65 c8fcdde8 2023-01-23 thomas 	const char *unix_socket_path;
 66 3efd8e31 2022-10-23 thomas 	int gotd_sock = -1;
 67 3efd8e31 2022-10-23 thomas 	struct sockaddr_un	 sun;
 68 214d733a 2023-01-23 thomas 	char *gitcmd = NULL, *command = NULL, *repo_path = NULL;
 69 3efd8e31 2022-10-23 thomas 
 70 3efd8e31 2022-10-23 thomas #ifndef PROFILE
 71 3efd8e31 2022-10-23 thomas 	if (pledge("stdio recvfd unix unveil", NULL) == -1)
 72 3efd8e31 2022-10-23 thomas 		err(1, "pledge");
 73 3efd8e31 2022-10-23 thomas #endif
 74 6e58d3c9 2023-01-23 thomas 
 75 6e58d3c9 2023-01-23 thomas 	unix_socket_path = getenv("GOTD_UNIX_SOCKET");
 76 6e58d3c9 2023-01-23 thomas 	if (unix_socket_path == NULL)
 77 6e58d3c9 2023-01-23 thomas 		unix_socket_path = GOTD_UNIX_SOCKET;
 78 6e58d3c9 2023-01-23 thomas 
 79 6e58d3c9 2023-01-23 thomas 	error = apply_unveil(unix_socket_path);
 80 6e58d3c9 2023-01-23 thomas 	if (error)
 81 6e58d3c9 2023-01-23 thomas 		goto done;
 82 6e58d3c9 2023-01-23 thomas 
 83 65ca77c9 2022-10-23 thomas 	if (strcmp(argv[0], GOT_SERVE_CMD_SEND) == 0 ||
 84 65ca77c9 2022-10-23 thomas 	    strcmp(argv[0], GOT_SERVE_CMD_FETCH) == 0) {
 85 65ca77c9 2022-10-23 thomas 		if (argc != 2)
 86 65ca77c9 2022-10-23 thomas 			usage();
 87 65ca77c9 2022-10-23 thomas 		if (asprintf(&gitcmd, "%s %s", argv[0], argv[1]) == -1)
 88 65ca77c9 2022-10-23 thomas 			err(1, "asprintf");
 89 214d733a 2023-01-23 thomas 		error = got_serve_parse_command(&command, &repo_path, gitcmd);
 90 65ca77c9 2022-10-23 thomas 	} else {
 91 214d733a 2023-01-23 thomas 		if (argc != 3 || strcmp(argv[1], "-c") != 0)
 92 65ca77c9 2022-10-23 thomas 			usage();
 93 214d733a 2023-01-23 thomas 		error = got_serve_parse_command(&command, &repo_path, argv[2]);
 94 65ca77c9 2022-10-23 thomas 	}
 95 214d733a 2023-01-23 thomas 	if (error && error->code == GOT_ERR_BAD_PACKET)
 96 214d733a 2023-01-23 thomas 		usage();
 97 214d733a 2023-01-23 thomas 	if (error)
 98 214d733a 2023-01-23 thomas 		goto done;
 99 3efd8e31 2022-10-23 thomas 
100 3efd8e31 2022-10-23 thomas 	if ((gotd_sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
101 3efd8e31 2022-10-23 thomas 		err(1, "socket");
102 3efd8e31 2022-10-23 thomas 
103 3efd8e31 2022-10-23 thomas 	memset(&sun, 0, sizeof(sun));
104 3efd8e31 2022-10-23 thomas 	sun.sun_family = AF_UNIX;
105 3efd8e31 2022-10-23 thomas 	if (strlcpy(sun.sun_path, unix_socket_path,
106 3efd8e31 2022-10-23 thomas 	    sizeof(sun.sun_path)) >= sizeof(sun.sun_path))
107 3efd8e31 2022-10-23 thomas 		errx(1, "gotd socket path too long");
108 3efd8e31 2022-10-23 thomas 	if (connect(gotd_sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
109 3efd8e31 2022-10-23 thomas 		err(1, "connect: %s", unix_socket_path);
110 3efd8e31 2022-10-23 thomas 
111 3efd8e31 2022-10-23 thomas #ifndef PROFILE
112 3efd8e31 2022-10-23 thomas 	if (pledge("stdio recvfd", NULL) == -1)
113 3efd8e31 2022-10-23 thomas 		err(1, "pledge");
114 3efd8e31 2022-10-23 thomas #endif
115 214d733a 2023-01-23 thomas 	error = got_serve(STDIN_FILENO, STDOUT_FILENO, command, repo_path,
116 214d733a 2023-01-23 thomas 	    gotd_sock, chattygot);
117 3efd8e31 2022-10-23 thomas done:
118 65ca77c9 2022-10-23 thomas 	free(gitcmd);
119 214d733a 2023-01-23 thomas 	free(command);
120 214d733a 2023-01-23 thomas 	free(repo_path);
121 3efd8e31 2022-10-23 thomas 	if (gotd_sock != -1)
122 3efd8e31 2022-10-23 thomas 		close(gotd_sock);
123 3efd8e31 2022-10-23 thomas 	if (error) {
124 3efd8e31 2022-10-23 thomas 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
125 3efd8e31 2022-10-23 thomas 		return 1;
126 3efd8e31 2022-10-23 thomas 	}
127 3efd8e31 2022-10-23 thomas 
128 3efd8e31 2022-10-23 thomas 	return 0;
129 3efd8e31 2022-10-23 thomas }