1 /*
2 * Copyright (C) 1986-2005 The Free Software Foundation, Inc.
3 *
4 * Portions Copyright (C) 1998-2005 Derek Price, Ximbiot <http://ximbiot.com>,
5 * and others.
6 *
7 * Portions Copyright (C) 1992, Brian Berliner and Jeff Polk
8 * Portions Copyright (C) 1989-1992, Brian Berliner
9 *
10 * You may distribute under the terms of the GNU General Public License as
11 * specified in the README file that comes with the CVS source distribution.
12 */
13 #include <sys/cdefs.h>
14 __RCSID("$NetBSD: repos.c,v 1.2 2016/05/17 14:00:09 christos Exp $");
15
16 #include "cvs.h"
17 #include "getline.h"
18
19
20
21 /* Determine the name of the RCS repository for directory DIR in the
22 current working directory, or for the current working directory
23 itself if DIR is NULL. Returns the name in a newly-malloc'd
24 string. On error, gives a fatal error and does not return.
25 UPDATE_DIR is the path from where cvs was invoked (for use in error
26 messages), and should contain DIR as its last component.
27 UPDATE_DIR can be NULL to signify the directory in which cvs was
28 invoked. */
29
30 char *
Name_Repository(const char * dir,const char * update_dir)31 Name_Repository (const char *dir, const char *update_dir)
32 {
33 FILE *fpin;
34 const char *xupdate_dir;
35 char *repos = NULL;
36 size_t repos_allocated = 0;
37 char *tmp;
38 char *cp;
39
40 if (update_dir && *update_dir)
41 xupdate_dir = update_dir;
42 else
43 xupdate_dir = ".";
44
45 if (dir != NULL)
46 tmp = Xasprintf ("%s/%s", dir, CVSADM_REP);
47 else
48 tmp = xstrdup (CVSADM_REP);
49
50 /*
51 * The assumption here is that the repository is always contained in the
52 * first line of the "Repository" file.
53 */
54 fpin = CVS_FOPEN (tmp, "r");
55
56 if (fpin == NULL)
57 {
58 int save_errno = errno;
59 char *cvsadm;
60
61 if (dir != NULL)
62 cvsadm = Xasprintf ("%s/%s", dir, CVSADM);
63 else
64 cvsadm = xstrdup (CVSADM);
65
66 if (!isdir (cvsadm))
67 {
68 error (0, 0, "in directory `%s':", xupdate_dir);
69 error (1, 0, "there is no version here; do `%s checkout' first",
70 program_name);
71 }
72 free (cvsadm);
73
74 if (existence_error (save_errno))
75 {
76 /* This occurs at least in the case where the user manually
77 * creates a directory named CVS.
78 */
79 error (0, 0, "in directory `%s':", xupdate_dir);
80 error (0, 0, "CVS directory found without administrative files.");
81 error (0, 0, "Use CVS to create the CVS directory, or rename the");
82 error (0, 0, "directory if it is intended to store something");
83 error (0, 0, "besides CVS administrative files.");
84 error (1, 0, "*PANIC* administration files missing!");
85 }
86
87 error (1, save_errno, "cannot open `%s'", tmp);
88 }
89
90 if (getline (&repos, &repos_allocated, fpin) < 0)
91 {
92 /* FIXME: should be checking for end of file separately. */
93 error (0, 0, "in directory `%s':", xupdate_dir);
94 error (1, errno, "cannot read `%s'", CVSADM_REP);
95 }
96 if (fclose (fpin) < 0)
97 error (0, errno, "cannot close `%s'", tmp);
98 free (tmp);
99
100 if ((cp = strrchr (repos, '\n')) != NULL)
101 *cp = '\0'; /* strip the newline */
102
103 /* If this is a relative repository pathname, turn it into an absolute
104 * one by tacking on the current root. There is no need to grab it from
105 * the CVS/Root file via the Name_Root() function because by the time
106 * this function is called, we the contents of CVS/Root have already been
107 * compared to original_root and found to match.
108 */
109 if (!ISABSOLUTE (repos))
110 {
111 char *newrepos;
112
113 if (current_parsed_root == NULL)
114 {
115 error (0, 0, "in directory `%s:", xupdate_dir);
116 error (0, 0, "must set the CVSROOT environment variable\n");
117 error (0, 0, "or specify the '-d' option to `%s'.", program_name);
118 error (1, 0, "invalid repository setting");
119 }
120 if (pathname_levels (repos) > 0)
121 {
122 error (0, 0, "in directory `%s':", xupdate_dir);
123 error (0, 0, "`..'-relative repositories are not supported.");
124 error (1, 0, "invalid source repository");
125 }
126 newrepos = Xasprintf ("%s/%s", original_parsed_root->directory, repos);
127 free (repos);
128 repos = newrepos;
129 }
130
131 Sanitize_Repository_Name (repos);
132
133 return repos;
134 }
135
136
137
138 /*
139 * Return a pointer to the repository name relative to CVSROOT from a
140 * possibly fully qualified repository
141 */
142 const char *
Short_Repository(const char * repository)143 Short_Repository (const char *repository)
144 {
145 if (repository == NULL)
146 return NULL;
147
148 /* If repository matches CVSroot at the beginning, strip off CVSroot */
149 /* And skip leading '/' in rep, in case CVSroot ended with '/'. */
150 if (strncmp (original_parsed_root->directory, repository,
151 strlen (original_parsed_root->directory)) == 0)
152 {
153 const char *rep = repository + strlen (original_parsed_root->directory);
154 return (*rep == '/') ? rep+1 : rep;
155 }
156 else
157 return repository;
158 }
159
160
161
162 /* Sanitize the repository name (in place) by removing trailing
163 * slashes and a trailing "." if present. It should be safe for
164 * callers to use strcat and friends to create repository names.
165 * Without this check, names like "/path/to/repos/./foo" and
166 * "/path/to/repos//foo" would be created. For example, one
167 * significant case is the CVSROOT-detection code in commit.c. It
168 * decides whether or not it needs to rebuild the administrative file
169 * database by doing a string compare. If we've done a `cvs co .' to
170 * get the CVSROOT files, "/path/to/repos/./CVSROOT" and
171 * "/path/to/repos/CVSROOT" are the arguments that are compared!
172 *
173 * This function ends up being called from the same places as
174 * strip_path, though what it does is much more conservative. Many
175 * comments about this operation (which was scattered around in
176 * several places in the source code) ran thus:
177 *
178 * ``repository ends with "/."; omit it. This sort of thing used
179 * to be taken care of by strip_path. Now we try to be more
180 * selective. I suspect that it would be even better to push it
181 * back further someday, so that the trailing "/." doesn't get into
182 * repository in the first place, but we haven't taken things that
183 * far yet.'' --Jim Kingdon (recurse.c, 07-Sep-97)
184 */
185
186 void
Sanitize_Repository_Name(char * repository)187 Sanitize_Repository_Name (char *repository)
188 {
189 size_t len;
190
191 assert (repository != NULL);
192
193 strip_trailing_slashes (repository);
194
195 len = strlen (repository);
196 if (len >= 2
197 && repository[len - 1] == '.'
198 && ISSLASH (repository[len - 2]))
199 {
200 repository[len - 2] = '\0';
201 }
202 }
203