1/*	$OpenBSD: init.c,v 1.42 2021/10/25 10:07:12 deraadt Exp $	*/
2/*
3 * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
4 * Copyright (c) 2006 Xavier Santolaria <xsa@openbsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL  DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/stat.h>
29
30#include <errno.h>
31#include <fcntl.h>
32#include <string.h>
33#include <unistd.h>
34
35#include "atomicio.h"
36#include "cvs.h"
37#include "init.h"
38#include "remote.h"
39
40void	cvs_init_local(void);
41
42static void init_mkdir(const char *, mode_t);
43static void init_mkfile(char *, char **);
44
45struct cvsroot_file {
46	char			*cf_path;
47	char			**cf_content;
48};
49
50static const struct cvsroot_file cvsroot_files[] = {
51	{ CVS_PATH_CHECKOUTLIST,	NULL			},
52	{ CVS_PATH_COMMITINFO,		NULL			},
53	{ CVS_PATH_CONFIG,		config_contents		},
54	{ CVS_PATH_CVSWRAPPERS,		NULL			},
55	{ CVS_PATH_EDITINFO,		NULL			},
56	{ CVS_PATH_HISTORY,		NULL			},
57	{ CVS_PATH_LOGINFO,		NULL			},
58	{ CVS_PATH_MODULES,		NULL			},
59	{ CVS_PATH_NOTIFY_R,		NULL			},
60	{ CVS_PATH_RCSINFO,		NULL			},
61	{ CVS_PATH_TAGINFO,		NULL			},
62	{ CVS_PATH_VALTAGS,		NULL			},
63	{ CVS_PATH_VERIFYMSG,		NULL			}
64};
65
66static const char *cvsroot_dirs[2] = {
67	CVS_PATH_ROOT, CVS_PATH_EMPTYDIR
68};
69
70#define INIT_NFILES	(sizeof(cvsroot_files)/sizeof(cvsroot_files[0]))
71#define INIT_NDIRS	(sizeof(cvsroot_dirs)/sizeof(cvsroot_dirs[0]))
72
73struct cvs_cmd cvs_cmd_init = {
74	CVS_OP_INIT, 0, "init",
75	{ { 0 }, { 0 } },
76	"Create a CVS repository if it doesn't exist",
77	"",
78	"",
79	NULL,
80	cvs_init
81};
82
83int
84cvs_init(int argc, char **argv)
85{
86	if (argc > 1)
87		fatal("init does not take any extra arguments");
88
89	if (cvsroot_is_remote()) {
90		cvs_client_connect_to_server();
91		cvs_client_send_request("init %s", current_cvsroot->cr_dir);
92		cvs_client_get_responses();
93	} else {
94		cvs_init_local();
95	}
96
97	return (0);
98}
99
100void
101cvs_init_local(void)
102{
103	u_int i;
104	char path[PATH_MAX];
105
106	cvs_log(LP_TRACE, "cvs_init_local()");
107
108	/* Create repository root directory if it does not already exist */
109	init_mkdir(current_cvsroot->cr_dir, 0777);
110
111	for (i = 0; i < INIT_NDIRS; i++) {
112		(void)xsnprintf(path, PATH_MAX, "%s/%s",
113		    current_cvsroot->cr_dir, cvsroot_dirs[i]);
114
115		init_mkdir(path, 0777);
116	}
117
118	for (i = 0; i < INIT_NFILES; i++) {
119		(void)xsnprintf(path, PATH_MAX, "%s/%s",
120		    current_cvsroot->cr_dir, cvsroot_files[i].cf_path);
121
122		init_mkfile(path, cvsroot_files[i].cf_content);
123	}
124}
125
126static void
127init_mkdir(const char *path, mode_t mode)
128{
129	struct stat st;
130
131	if (mkdir(path, mode) == -1) {
132		if (!(errno == EEXIST ||
133		    (errno == EACCES && (stat(path, &st) == 0) &&
134		    S_ISDIR(st.st_mode)))) {
135			fatal("init_mkdir: mkdir: `%s': %s",
136			    path, strerror(errno));
137		}
138	}
139}
140
141static void
142init_mkfile(char *path, char **content)
143{
144	BUF *b;
145	size_t len;
146	int fd, rcsflags;
147	char rpath[PATH_MAX];
148	char **p;
149	RCSFILE *file;
150
151	rcsflags = RCS_WRITE | RCS_CREATE;
152
153	if ((fd = open(path, O_WRONLY | O_CREAT | O_EXCL, 0444)) == -1)
154		fatal("init_mkfile: open: `%s': %s", path, strerror(errno));
155
156	if (content != NULL) {
157		for (p = content; *p != NULL; ++p) {
158			len = strlen(*p);
159			if (atomicio(vwrite, fd, *p, len) != len)
160				fatal("init_mkfile: atomicio failed");
161		}
162	}
163
164	/*
165	 * Make sure history and val-tags files are world-writable.
166	 * Every user should be able to write to them.
167	 */
168	if (strcmp(strrchr(CVS_PATH_HISTORY, '/'), strrchr(path, '/')) == 0 ||
169	    strcmp(strrchr(CVS_PATH_VALTAGS, '/'), strrchr(path, '/')) == 0) {
170		(void)fchmod(fd, 0666);
171		(void)close(fd);
172		return;
173	}
174
175	(void)xsnprintf(rpath, PATH_MAX, "%s%s", path, RCS_FILE_EXT);
176
177	if ((file = rcs_open(rpath, -1, rcsflags, 0444)) == NULL)
178		fatal("failed to create RCS file for `%s'", path);
179
180	b = buf_load(path);
181
182	if (rcs_rev_add(file, RCS_HEAD_REV, "initial checkin", -1, NULL) == -1)
183		fatal("init_mkfile: failed to add new revision");
184
185	/* b buffer is free'd in rcs_deltatext_set */
186	if (rcs_deltatext_set(file, file->rf_head, b) == -1)
187		fatal("init_mkfile: failed to set delta");
188
189	file->rf_flags &= ~RCS_SYNCED;
190	rcs_close(file);
191	(void)close(fd);
192}
193