1 d348087d 2022-10-13 thomas /*
  2 d348087d 2022-10-13 thomas  * Copyright (c) 2019, 2022 Stefan Sperling <stsp@openbsd.org>
  3 d348087d 2022-10-13 thomas  *
  4 d348087d 2022-10-13 thomas  * Permission to use, copy, modify, and distribute this software for any
  5 d348087d 2022-10-13 thomas  * purpose with or without fee is hereby granted, provided that the above
  6 d348087d 2022-10-13 thomas  * copyright notice and this permission notice appear in all copies.
  7 d348087d 2022-10-13 thomas  *
  8 d348087d 2022-10-13 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 d348087d 2022-10-13 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 d348087d 2022-10-13 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 d348087d 2022-10-13 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 d348087d 2022-10-13 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 d348087d 2022-10-13 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 d348087d 2022-10-13 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 d348087d 2022-10-13 thomas  */
 16 d348087d 2022-10-13 thomas 
 17 d348087d 2022-10-13 thomas #include <sys/types.h>
 18 d348087d 2022-10-13 thomas #include <sys/socket.h>
 19 d348087d 2022-10-13 thomas #include <sys/queue.h>
 20 d348087d 2022-10-13 thomas #include <sys/uio.h>
 21 d348087d 2022-10-13 thomas 
 22 d348087d 2022-10-13 thomas #include <errno.h>
 23 d348087d 2022-10-13 thomas #include <fcntl.h>
 24 d348087d 2022-10-13 thomas #include <limits.h>
 25 d348087d 2022-10-13 thomas #include <stdio.h>
 26 d348087d 2022-10-13 thomas #include <stdlib.h>
 27 d348087d 2022-10-13 thomas #include <stdint.h>
 28 d348087d 2022-10-13 thomas #include <imsg.h>
 29 d348087d 2022-10-13 thomas #include <unistd.h>
 30 d348087d 2022-10-13 thomas 
 31 d348087d 2022-10-13 thomas #include "got_error.h"
 32 d348087d 2022-10-13 thomas #include "got_object.h"
 33 d348087d 2022-10-13 thomas #include "got_repository.h"
 34 d348087d 2022-10-13 thomas #include "got_path.h"
 35 d348087d 2022-10-13 thomas 
 36 d348087d 2022-10-13 thomas #include "got_lib_delta.h"
 37 d348087d 2022-10-13 thomas #include "got_lib_object.h"
 38 d348087d 2022-10-13 thomas #include "got_lib_object_cache.h"
 39 d348087d 2022-10-13 thomas #include "got_lib_privsep.h"
 40 d348087d 2022-10-13 thomas #include "got_lib_pack.h"
 41 d348087d 2022-10-13 thomas #include "got_lib_repository.h"
 42 d348087d 2022-10-13 thomas 
 43 d348087d 2022-10-13 thomas const struct got_error *
 44 d348087d 2022-10-13 thomas got_repo_read_gitconfig(int *gitconfig_repository_format_version,
 45 d348087d 2022-10-13 thomas     char **gitconfig_author_name, char **gitconfig_author_email,
 46 d348087d 2022-10-13 thomas     struct got_remote_repo **remotes, int *nremotes,
 47 d348087d 2022-10-13 thomas     char **gitconfig_owner, char ***extensions, int *nextensions,
 48 d348087d 2022-10-13 thomas     const char *gitconfig_path)
 49 d348087d 2022-10-13 thomas {
 50 d348087d 2022-10-13 thomas 	const struct got_error *err = NULL, *child_err = NULL;
 51 d348087d 2022-10-13 thomas 	int fd = -1;
 52 d348087d 2022-10-13 thomas 	int imsg_fds[2] = { -1, -1 };
 53 d348087d 2022-10-13 thomas 	pid_t pid;
 54 d348087d 2022-10-13 thomas 	struct imsgbuf *ibuf;
 55 d348087d 2022-10-13 thomas 
 56 d348087d 2022-10-13 thomas 	*gitconfig_repository_format_version = 0;
 57 d348087d 2022-10-13 thomas 	if (extensions)
 58 d348087d 2022-10-13 thomas 		*extensions = NULL;
 59 d348087d 2022-10-13 thomas 	if (nextensions)
 60 d348087d 2022-10-13 thomas 		*nextensions = 0;
 61 d348087d 2022-10-13 thomas 	*gitconfig_author_name = NULL;
 62 d348087d 2022-10-13 thomas 	*gitconfig_author_email = NULL;
 63 d348087d 2022-10-13 thomas 	if (remotes)
 64 d348087d 2022-10-13 thomas 		*remotes = NULL;
 65 d348087d 2022-10-13 thomas 	if (nremotes)
 66 d348087d 2022-10-13 thomas 		*nremotes = 0;
 67 d348087d 2022-10-13 thomas 	if (gitconfig_owner)
 68 d348087d 2022-10-13 thomas 		*gitconfig_owner = NULL;
 69 d348087d 2022-10-13 thomas 
 70 d348087d 2022-10-13 thomas 	fd = open(gitconfig_path, O_RDONLY | O_CLOEXEC);
 71 d348087d 2022-10-13 thomas 	if (fd == -1) {
 72 d348087d 2022-10-13 thomas 		if (errno == ENOENT)
 73 d348087d 2022-10-13 thomas 			return NULL;
 74 d348087d 2022-10-13 thomas 		return got_error_from_errno2("open", gitconfig_path);
 75 d348087d 2022-10-13 thomas 	}
 76 d348087d 2022-10-13 thomas 
 77 d348087d 2022-10-13 thomas 	ibuf = calloc(1, sizeof(*ibuf));
 78 d348087d 2022-10-13 thomas 	if (ibuf == NULL) {
 79 d348087d 2022-10-13 thomas 		err = got_error_from_errno("calloc");
 80 d348087d 2022-10-13 thomas 		goto done;
 81 d348087d 2022-10-13 thomas 	}
 82 d348087d 2022-10-13 thomas 
 83 d348087d 2022-10-13 thomas 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
 84 d348087d 2022-10-13 thomas 		err = got_error_from_errno("socketpair");
 85 d348087d 2022-10-13 thomas 		goto done;
 86 d348087d 2022-10-13 thomas 	}
 87 d348087d 2022-10-13 thomas 
 88 d348087d 2022-10-13 thomas 	pid = fork();
 89 d348087d 2022-10-13 thomas 	if (pid == -1) {
 90 d348087d 2022-10-13 thomas 		err = got_error_from_errno("fork");
 91 d348087d 2022-10-13 thomas 		goto done;
 92 d348087d 2022-10-13 thomas 	} else if (pid == 0) {
 93 d348087d 2022-10-13 thomas 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
 94 d348087d 2022-10-13 thomas 		    gitconfig_path);
 95 d348087d 2022-10-13 thomas 		/* not reached */
 96 d348087d 2022-10-13 thomas 	}
 97 d348087d 2022-10-13 thomas 
 98 d348087d 2022-10-13 thomas 	if (close(imsg_fds[1]) == -1) {
 99 d348087d 2022-10-13 thomas 		err = got_error_from_errno("close");
100 d348087d 2022-10-13 thomas 		goto done;
101 d348087d 2022-10-13 thomas 	}
102 d348087d 2022-10-13 thomas 	imsg_fds[1] = -1;
103 d348087d 2022-10-13 thomas 	imsg_init(ibuf, imsg_fds[0]);
104 d348087d 2022-10-13 thomas 
105 d348087d 2022-10-13 thomas 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
106 d348087d 2022-10-13 thomas 	if (err)
107 d348087d 2022-10-13 thomas 		goto done;
108 d348087d 2022-10-13 thomas 	fd = -1;
109 d348087d 2022-10-13 thomas 
110 d348087d 2022-10-13 thomas 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
111 d348087d 2022-10-13 thomas 	if (err)
112 d348087d 2022-10-13 thomas 		goto done;
113 d348087d 2022-10-13 thomas 
114 d348087d 2022-10-13 thomas 	err = got_privsep_recv_gitconfig_int(
115 d348087d 2022-10-13 thomas 	    gitconfig_repository_format_version, ibuf);
116 d348087d 2022-10-13 thomas 	if (err)
117 d348087d 2022-10-13 thomas 		goto done;
118 d348087d 2022-10-13 thomas 
119 d348087d 2022-10-13 thomas 	if (extensions && nextensions) {
120 d348087d 2022-10-13 thomas 		err = got_privsep_send_gitconfig_repository_extensions_req(
121 d348087d 2022-10-13 thomas 		    ibuf);
122 d348087d 2022-10-13 thomas 		if (err)
123 d348087d 2022-10-13 thomas 			goto done;
124 d348087d 2022-10-13 thomas 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
125 d348087d 2022-10-13 thomas 		if (err)
126 d348087d 2022-10-13 thomas 			goto done;
127 d348087d 2022-10-13 thomas 		if (*nextensions > 0) {
128 d348087d 2022-10-13 thomas 			int i;
129 d348087d 2022-10-13 thomas 			*extensions = calloc(*nextensions, sizeof(char *));
130 d348087d 2022-10-13 thomas 			if (*extensions == NULL) {
131 d348087d 2022-10-13 thomas 				err = got_error_from_errno("calloc");
132 d348087d 2022-10-13 thomas 				goto done;
133 d348087d 2022-10-13 thomas 			}
134 d348087d 2022-10-13 thomas 			for (i = 0; i < *nextensions; i++) {
135 d348087d 2022-10-13 thomas 				char *ext;
136 d348087d 2022-10-13 thomas 				err = got_privsep_recv_gitconfig_str(&ext,
137 d348087d 2022-10-13 thomas 				    ibuf);
138 d348087d 2022-10-13 thomas 				if (err)
139 d348087d 2022-10-13 thomas 					goto done;
140 d348087d 2022-10-13 thomas 				(*extensions)[i] = ext;
141 d348087d 2022-10-13 thomas 			}
142 d348087d 2022-10-13 thomas 		}
143 d348087d 2022-10-13 thomas 	}
144 d348087d 2022-10-13 thomas 
145 d348087d 2022-10-13 thomas 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
146 d348087d 2022-10-13 thomas 	if (err)
147 d348087d 2022-10-13 thomas 		goto done;
148 d348087d 2022-10-13 thomas 
149 d348087d 2022-10-13 thomas 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
150 d348087d 2022-10-13 thomas 	if (err)
151 d348087d 2022-10-13 thomas 		goto done;
152 d348087d 2022-10-13 thomas 
153 d348087d 2022-10-13 thomas 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
154 d348087d 2022-10-13 thomas 	if (err)
155 d348087d 2022-10-13 thomas 		goto done;
156 d348087d 2022-10-13 thomas 
157 d348087d 2022-10-13 thomas 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
158 d348087d 2022-10-13 thomas 	if (err)
159 d348087d 2022-10-13 thomas 		goto done;
160 d348087d 2022-10-13 thomas 
161 d348087d 2022-10-13 thomas 	if (remotes && nremotes) {
162 d348087d 2022-10-13 thomas 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
163 d348087d 2022-10-13 thomas 		if (err)
164 d348087d 2022-10-13 thomas 			goto done;
165 d348087d 2022-10-13 thomas 
166 d348087d 2022-10-13 thomas 		err = got_privsep_recv_gitconfig_remotes(remotes,
167 d348087d 2022-10-13 thomas 		    nremotes, ibuf);
168 d348087d 2022-10-13 thomas 		if (err)
169 d348087d 2022-10-13 thomas 			goto done;
170 d348087d 2022-10-13 thomas 	}
171 d348087d 2022-10-13 thomas 
172 d348087d 2022-10-13 thomas 	if (gitconfig_owner) {
173 d348087d 2022-10-13 thomas 		err = got_privsep_send_gitconfig_owner_req(ibuf);
174 d348087d 2022-10-13 thomas 		if (err)
175 d348087d 2022-10-13 thomas 			goto done;
176 d348087d 2022-10-13 thomas 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
177 d348087d 2022-10-13 thomas 		if (err)
178 d348087d 2022-10-13 thomas 			goto done;
179 d348087d 2022-10-13 thomas 	}
180 d348087d 2022-10-13 thomas 
181 d348087d 2022-10-13 thomas 	err = got_privsep_send_stop(imsg_fds[0]);
182 d348087d 2022-10-13 thomas 	child_err = got_privsep_wait_for_child(pid);
183 d348087d 2022-10-13 thomas 	if (child_err && err == NULL)
184 d348087d 2022-10-13 thomas 		err = child_err;
185 d348087d 2022-10-13 thomas done:
186 d348087d 2022-10-13 thomas 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
187 d348087d 2022-10-13 thomas 		err = got_error_from_errno("close");
188 d348087d 2022-10-13 thomas 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
189 d348087d 2022-10-13 thomas 		err = got_error_from_errno("close");
190 d348087d 2022-10-13 thomas 	if (fd != -1 && close(fd) == -1 && err == NULL)
191 d348087d 2022-10-13 thomas 		err = got_error_from_errno2("close", gitconfig_path);
192 d348087d 2022-10-13 thomas 	free(ibuf);
193 d348087d 2022-10-13 thomas 	return err;
194 d348087d 2022-10-13 thomas }