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move code for reading Git's config file into new file read_gitconfig_privsep.c The end goal here is to remove the dependency of repository.c on privsep.c during compilation.
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  1 6a800804 2022-10-13 stsp /*

  2 6a800804 2022-10-13 stsp  * Copyright (c) 2019, 2022 Stefan Sperling <stsp@openbsd.org>

  3 6a800804 2022-10-13 stsp  *

  4 6a800804 2022-10-13 stsp  * Permission to use, copy, modify, and distribute this software for any

  5 6a800804 2022-10-13 stsp  * purpose with or without fee is hereby granted, provided that the above

  6 6a800804 2022-10-13 stsp  * copyright notice and this permission notice appear in all copies.

  7 6a800804 2022-10-13 stsp  *

  8 6a800804 2022-10-13 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

  9 6a800804 2022-10-13 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 10 6a800804 2022-10-13 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 11 6a800804 2022-10-13 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 12 6a800804 2022-10-13 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

 13 6a800804 2022-10-13 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

 14 6a800804 2022-10-13 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 15 6a800804 2022-10-13 stsp  */

 16 6a800804 2022-10-13 stsp 

 17 6a800804 2022-10-13 stsp #include <sys/types.h>

 18 6a800804 2022-10-13 stsp #include <sys/tree.h>

 19 6a800804 2022-10-13 stsp #include <sys/socket.h>

 20 6a800804 2022-10-13 stsp #include <sys/queue.h>

 21 6a800804 2022-10-13 stsp #include <sys/uio.h>

 22 6a800804 2022-10-13 stsp 

 23 6a800804 2022-10-13 stsp #include <errno.h>

 24 6a800804 2022-10-13 stsp #include <fcntl.h>

 25 6a800804 2022-10-13 stsp #include <limits.h>

 26 6a800804 2022-10-13 stsp #include <sha1.h>

 27 6a800804 2022-10-13 stsp #include <stdio.h>

 28 6a800804 2022-10-13 stsp #include <stdlib.h>

 29 6a800804 2022-10-13 stsp #include <stdint.h>

 30 6a800804 2022-10-13 stsp #include <imsg.h>

 31 6a800804 2022-10-13 stsp #include <unistd.h>

 32 6a800804 2022-10-13 stsp 

 33 6a800804 2022-10-13 stsp #include "got_error.h"

 34 6a800804 2022-10-13 stsp #include "got_object.h"

 35 6a800804 2022-10-13 stsp #include "got_repository.h"

 36 6a800804 2022-10-13 stsp #include "got_path.h"

 37 6a800804 2022-10-13 stsp 

 38 6a800804 2022-10-13 stsp #include "got_lib_delta.h"

 39 6a800804 2022-10-13 stsp #include "got_lib_object.h"

 40 6a800804 2022-10-13 stsp #include "got_lib_object_cache.h"

 41 6a800804 2022-10-13 stsp #include "got_lib_privsep.h"

 42 6a800804 2022-10-13 stsp #include "got_lib_pack.h"

 43 6a800804 2022-10-13 stsp #include "got_lib_repository.h"

 44 6a800804 2022-10-13 stsp 

 45 6a800804 2022-10-13 stsp const struct got_error *

 46 6a800804 2022-10-13 stsp got_repo_read_gitconfig(int *gitconfig_repository_format_version,

 47 6a800804 2022-10-13 stsp     char **gitconfig_author_name, char **gitconfig_author_email,

 48 6a800804 2022-10-13 stsp     struct got_remote_repo **remotes, int *nremotes,

 49 6a800804 2022-10-13 stsp     char **gitconfig_owner, char ***extensions, int *nextensions,

 50 6a800804 2022-10-13 stsp     const char *gitconfig_path)

 51 6a800804 2022-10-13 stsp {

 52 6a800804 2022-10-13 stsp 	const struct got_error *err = NULL, *child_err = NULL;

 53 6a800804 2022-10-13 stsp 	int fd = -1;

 54 6a800804 2022-10-13 stsp 	int imsg_fds[2] = { -1, -1 };

 55 6a800804 2022-10-13 stsp 	pid_t pid;

 56 6a800804 2022-10-13 stsp 	struct imsgbuf *ibuf;

 57 6a800804 2022-10-13 stsp 

 58 6a800804 2022-10-13 stsp 	*gitconfig_repository_format_version = 0;

 59 6a800804 2022-10-13 stsp 	if (extensions)

 60 6a800804 2022-10-13 stsp 		*extensions = NULL;

 61 6a800804 2022-10-13 stsp 	if (nextensions)

 62 6a800804 2022-10-13 stsp 		*nextensions = 0;

 63 6a800804 2022-10-13 stsp 	*gitconfig_author_name = NULL;

 64 6a800804 2022-10-13 stsp 	*gitconfig_author_email = NULL;

 65 6a800804 2022-10-13 stsp 	if (remotes)

 66 6a800804 2022-10-13 stsp 		*remotes = NULL;

 67 6a800804 2022-10-13 stsp 	if (nremotes)

 68 6a800804 2022-10-13 stsp 		*nremotes = 0;

 69 6a800804 2022-10-13 stsp 	if (gitconfig_owner)

 70 6a800804 2022-10-13 stsp 		*gitconfig_owner = NULL;

 71 6a800804 2022-10-13 stsp 

 72 6a800804 2022-10-13 stsp 	fd = open(gitconfig_path, O_RDONLY | O_CLOEXEC);

 73 6a800804 2022-10-13 stsp 	if (fd == -1) {

 74 6a800804 2022-10-13 stsp 		if (errno == ENOENT)

 75 6a800804 2022-10-13 stsp 			return NULL;

 76 6a800804 2022-10-13 stsp 		return got_error_from_errno2("open", gitconfig_path);

 77 6a800804 2022-10-13 stsp 	}

 78 6a800804 2022-10-13 stsp 

 79 6a800804 2022-10-13 stsp 	ibuf = calloc(1, sizeof(*ibuf));

 80 6a800804 2022-10-13 stsp 	if (ibuf == NULL) {

 81 6a800804 2022-10-13 stsp 		err = got_error_from_errno("calloc");

 82 6a800804 2022-10-13 stsp 		goto done;

 83 6a800804 2022-10-13 stsp 	}

 84 6a800804 2022-10-13 stsp 

 85 6a800804 2022-10-13 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {

 86 6a800804 2022-10-13 stsp 		err = got_error_from_errno("socketpair");

 87 6a800804 2022-10-13 stsp 		goto done;

 88 6a800804 2022-10-13 stsp 	}

 89 6a800804 2022-10-13 stsp 

 90 6a800804 2022-10-13 stsp 	pid = fork();

 91 6a800804 2022-10-13 stsp 	if (pid == -1) {

 92 6a800804 2022-10-13 stsp 		err = got_error_from_errno("fork");

 93 6a800804 2022-10-13 stsp 		goto done;

 94 6a800804 2022-10-13 stsp 	} else if (pid == 0) {

 95 6a800804 2022-10-13 stsp 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,

 96 6a800804 2022-10-13 stsp 		    gitconfig_path);

 97 6a800804 2022-10-13 stsp 		/* not reached */

 98 6a800804 2022-10-13 stsp 	}

 99 6a800804 2022-10-13 stsp 

100 6a800804 2022-10-13 stsp 	if (close(imsg_fds[1]) == -1) {

101 6a800804 2022-10-13 stsp 		err = got_error_from_errno("close");

102 6a800804 2022-10-13 stsp 		goto done;

103 6a800804 2022-10-13 stsp 	}

104 6a800804 2022-10-13 stsp 	imsg_fds[1] = -1;

105 6a800804 2022-10-13 stsp 	imsg_init(ibuf, imsg_fds[0]);

106 6a800804 2022-10-13 stsp 

107 6a800804 2022-10-13 stsp 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);

108 6a800804 2022-10-13 stsp 	if (err)

109 6a800804 2022-10-13 stsp 		goto done;

110 6a800804 2022-10-13 stsp 	fd = -1;

111 6a800804 2022-10-13 stsp 

112 6a800804 2022-10-13 stsp 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);

113 6a800804 2022-10-13 stsp 	if (err)

114 6a800804 2022-10-13 stsp 		goto done;

115 6a800804 2022-10-13 stsp 

116 6a800804 2022-10-13 stsp 	err = got_privsep_recv_gitconfig_int(

117 6a800804 2022-10-13 stsp 	    gitconfig_repository_format_version, ibuf);

118 6a800804 2022-10-13 stsp 	if (err)

119 6a800804 2022-10-13 stsp 		goto done;

120 6a800804 2022-10-13 stsp 

121 6a800804 2022-10-13 stsp 	if (extensions && nextensions) {

122 6a800804 2022-10-13 stsp 		err = got_privsep_send_gitconfig_repository_extensions_req(

123 6a800804 2022-10-13 stsp 		    ibuf);

124 6a800804 2022-10-13 stsp 		if (err)

125 6a800804 2022-10-13 stsp 			goto done;

126 6a800804 2022-10-13 stsp 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);

127 6a800804 2022-10-13 stsp 		if (err)

128 6a800804 2022-10-13 stsp 			goto done;

129 6a800804 2022-10-13 stsp 		if (*nextensions > 0) {

130 6a800804 2022-10-13 stsp 			int i;

131 6a800804 2022-10-13 stsp 			*extensions = calloc(*nextensions, sizeof(char *));

132 6a800804 2022-10-13 stsp 			if (*extensions == NULL) {

133 6a800804 2022-10-13 stsp 				err = got_error_from_errno("calloc");

134 6a800804 2022-10-13 stsp 				goto done;

135 6a800804 2022-10-13 stsp 			}

136 6a800804 2022-10-13 stsp 			for (i = 0; i < *nextensions; i++) {

137 6a800804 2022-10-13 stsp 				char *ext;

138 6a800804 2022-10-13 stsp 				err = got_privsep_recv_gitconfig_str(&ext,

139 6a800804 2022-10-13 stsp 				    ibuf);

140 6a800804 2022-10-13 stsp 				if (err)

141 6a800804 2022-10-13 stsp 					goto done;

142 6a800804 2022-10-13 stsp 				(*extensions)[i] = ext;

143 6a800804 2022-10-13 stsp 			}

144 6a800804 2022-10-13 stsp 		}

145 6a800804 2022-10-13 stsp 	}

146 6a800804 2022-10-13 stsp 

147 6a800804 2022-10-13 stsp 	err = got_privsep_send_gitconfig_author_name_req(ibuf);

148 6a800804 2022-10-13 stsp 	if (err)

149 6a800804 2022-10-13 stsp 		goto done;

150 6a800804 2022-10-13 stsp 

151 6a800804 2022-10-13 stsp 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);

152 6a800804 2022-10-13 stsp 	if (err)

153 6a800804 2022-10-13 stsp 		goto done;

154 6a800804 2022-10-13 stsp 

155 6a800804 2022-10-13 stsp 	err = got_privsep_send_gitconfig_author_email_req(ibuf);

156 6a800804 2022-10-13 stsp 	if (err)

157 6a800804 2022-10-13 stsp 		goto done;

158 6a800804 2022-10-13 stsp 

159 6a800804 2022-10-13 stsp 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);

160 6a800804 2022-10-13 stsp 	if (err)

161 6a800804 2022-10-13 stsp 		goto done;

162 6a800804 2022-10-13 stsp 

163 6a800804 2022-10-13 stsp 	if (remotes && nremotes) {

164 6a800804 2022-10-13 stsp 		err = got_privsep_send_gitconfig_remotes_req(ibuf);

165 6a800804 2022-10-13 stsp 		if (err)

166 6a800804 2022-10-13 stsp 			goto done;

167 6a800804 2022-10-13 stsp 

168 6a800804 2022-10-13 stsp 		err = got_privsep_recv_gitconfig_remotes(remotes,

169 6a800804 2022-10-13 stsp 		    nremotes, ibuf);

170 6a800804 2022-10-13 stsp 		if (err)

171 6a800804 2022-10-13 stsp 			goto done;

172 6a800804 2022-10-13 stsp 	}

173 6a800804 2022-10-13 stsp 

174 6a800804 2022-10-13 stsp 	if (gitconfig_owner) {

175 6a800804 2022-10-13 stsp 		err = got_privsep_send_gitconfig_owner_req(ibuf);

176 6a800804 2022-10-13 stsp 		if (err)

177 6a800804 2022-10-13 stsp 			goto done;

178 6a800804 2022-10-13 stsp 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);

179 6a800804 2022-10-13 stsp 		if (err)

180 6a800804 2022-10-13 stsp 			goto done;

181 6a800804 2022-10-13 stsp 	}

182 6a800804 2022-10-13 stsp 

183 6a800804 2022-10-13 stsp 	err = got_privsep_send_stop(imsg_fds[0]);

184 6a800804 2022-10-13 stsp 	child_err = got_privsep_wait_for_child(pid);

185 6a800804 2022-10-13 stsp 	if (child_err && err == NULL)

186 6a800804 2022-10-13 stsp 		err = child_err;

187 6a800804 2022-10-13 stsp done:

188 6a800804 2022-10-13 stsp 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)

189 6a800804 2022-10-13 stsp 		err = got_error_from_errno("close");

190 6a800804 2022-10-13 stsp 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)

191 6a800804 2022-10-13 stsp 		err = got_error_from_errno("close");

192 6a800804 2022-10-13 stsp 	if (fd != -1 && close(fd) == -1 && err == NULL)

193 6a800804 2022-10-13 stsp 		err = got_error_from_errno2("close", gitconfig_path);

194 6a800804 2022-10-13 stsp 	free(ibuf);

195 6a800804 2022-10-13 stsp 	return err;

196 6a800804 2022-10-13 stsp }