1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/* $OpenBSD: root.c,v 1.39 2007/05/11 11:29:26 xsa Exp $ */
/*
* Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "cvs.h"
extern char *cvs_rootstr;
/* keep these ordered with the defines */
const char *cvs_methods[] = {
"",
"local",
"ssh",
"pserver",
"kserver",
"gserver",
"ext",
"fork",
};
#define CVS_NBMETHODS (sizeof(cvs_methods)/sizeof(cvs_methods[0]))
/*
* CVSROOT cache
*
* Whenever cvsroot_parse() gets called for a specific string, it first
* checks in the cache to see if there is already a parsed version of the
* same string and returns a pointer to it in case one is found (it also
* increases the reference count). Otherwise, it does the parsing and adds
* the result to the cache for future hits.
*/
static TAILQ_HEAD(, cvsroot) cvs_rcache = TAILQ_HEAD_INITIALIZER(cvs_rcache);
static void cvsroot_free(struct cvsroot *);
/*
* cvsroot_parse()
*
* Parse a CVS root string (as found in CVS/Root files or the CVSROOT
* environment variable) and store the fields in a dynamically
* allocated cvs_root structure. The format of the string is as follows:
* [:method:][[user[:pass]@]host[:port]:]path
* Returns a pointer to the allocated information on success, or NULL
* on failure.
*/
struct cvsroot *
cvsroot_parse(const char *str)
{
u_int i;
char *cp, *sp, *pp;
const char *errstr;
struct cvsroot *root;
/*
* Look if we have it in cache, if we found it add it to the cache
* at the first position again.
*/
TAILQ_FOREACH(root, &cvs_rcache, root_cache) {
if (root->cr_str != NULL && strcmp(str, root->cr_str) == 0) {
TAILQ_REMOVE(&cvs_rcache, root, root_cache);
TAILQ_INSERT_HEAD(&cvs_rcache, root, root_cache);
root->cr_ref++;
return (root);
}
}
root = xcalloc(1, sizeof(*root));
root->cr_ref = 1;
root->cr_method = CVS_METHOD_NONE;
CVS_RSTVR(root);
root->cr_str = xstrdup(str);
root->cr_buf = xstrdup(str);
sp = root->cr_buf;
cp = root->cr_buf;
if (*sp == ':') {
sp++;
if ((cp = strchr(sp, ':')) == NULL)
fatal("failed to parse CVSROOT: unterminated method");
*(cp++) = '\0';
for (i = 0; i < CVS_NBMETHODS; i++) {
if (strcmp(sp, cvs_methods[i]) == 0) {
root->cr_method = i;
break;
}
}
if (i == CVS_NBMETHODS)
fatal("cvsroot_parse: unknown method `%s'", sp);
}
/* find the start of the actual path */
if ((sp = strchr(cp, '/')) == NULL)
fatal("no path specification in CVSROOT");
root->cr_dir = sp;
STRIP_SLASH(root->cr_dir);
if (sp == cp) {
if (root->cr_method == CVS_METHOD_NONE)
root->cr_method = CVS_METHOD_LOCAL;
/* stop here, it's just a path */
TAILQ_INSERT_HEAD(&cvs_rcache, root, root_cache);
return (root);
}
if (*(sp - 1) != ':')
fatal("missing host/path delimiter in CVSROOT");
*(sp - 1) = '\0';
/*
* looks like we have more than just a directory path, so
* attempt to split it into user and host parts
*/
sp = strchr(cp, '@');
if (sp != NULL) {
*(sp++) = '\0';
/* password ? */
pp = strchr(cp, ':');
if (pp != NULL) {
*(pp++) = '\0';
root->cr_pass = pp;
}
root->cr_user = cp;
} else
sp = cp;
pp = strchr(sp, ':');
if (pp != NULL) {
*(pp++) = '\0';
root->cr_port = strtonum(pp, 1, 65535, &errstr);
if (errstr != NULL)
fatal("port specification in CVSROOT is %s", errstr);
}
root->cr_host = sp;
if (root->cr_method == CVS_METHOD_NONE) {
/* no method found from start of CVSROOT, guess */
if (root->cr_host != NULL)
root->cr_method = CVS_METHOD_SERVER;
else
root->cr_method = CVS_METHOD_LOCAL;
}
/* add to the cache */
TAILQ_INSERT_HEAD(&cvs_rcache, root, root_cache);
return (root);
}
/*
* cvsroot_remove()
*
* Remove a CVSROOT structure from the cache, and free it.
*/
void
cvsroot_remove(struct cvsroot *root)
{
root->cr_ref--;
if (root->cr_ref == 0) {
TAILQ_REMOVE(&cvs_rcache, root, root_cache);
cvsroot_free(root);
}
}
/*
* cvsroot_free()
*
* Free a CVSROOT structure previously allocated and returned by
* cvsroot_parse().
*/
static void
cvsroot_free(struct cvsroot *root)
{
if (root->cr_str != NULL)
xfree(root->cr_str);
if (root->cr_buf != NULL)
xfree(root->cr_buf);
if (root->cr_version != NULL)
xfree(root->cr_version);
xfree(root);
}
/*
* cvsroot_get()
*
* Get the CVSROOT information for a specific directory <dir>. The
* value is taken from one of 3 possible sources (in order of precedence):
*
* 1) the `-d' command-line option
* 2) the CVS/Root file found in checked-out trees
* 3) the CVSROOT environment variable
*/
struct cvsroot *
cvsroot_get(const char *dir)
{
size_t len;
char rootpath[MAXPATHLEN], *rootstr, line[128];
FILE *fp;
if (cvs_rootstr != NULL)
return cvsroot_parse(cvs_rootstr);
(void)xsnprintf(rootpath, MAXPATHLEN, "%s/%s", dir, CVS_PATH_ROOTSPEC);
if ((fp = fopen(rootpath, "r")) == NULL) {
if (errno == ENOENT) {
/* try env as a last resort */
if ((rootstr = getenv("CVSROOT")) != NULL)
return cvsroot_parse(rootstr);
else
return (NULL);
} else {
fatal("cvsroot_get: fopen: `%s': %s",
CVS_PATH_ROOTSPEC, strerror(errno));
}
}
if (fgets(line, (int)sizeof(line), fp) == NULL)
fatal("cvsroot_get: fgets: `%s'", CVS_PATH_ROOTSPEC);
(void)fclose(fp);
len = strlen(line);
if (len == 0)
cvs_log(LP_ERR, "empty %s file", CVS_PATH_ROOTSPEC);
else if (line[len - 1] == '\n')
line[--len] = '\0';
return cvsroot_parse(line);
}
|
