1 /* $OpenBSD: repository.c,v 1.26 2019/06/28 13:35:00 deraadt Exp $ */
2 /*
3 * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/stat.h>
19
20 #include <errno.h>
21 #include <fcntl.h>
22 #include <pwd.h>
23 #include <string.h>
24 #include <unistd.h>
25
26 #include "cvs.h"
27
28 struct wklhead repo_locks;
29
30 void
cvs_repository_unlock(const char * repo)31 cvs_repository_unlock(const char *repo)
32 {
33 char fpath[PATH_MAX];
34
35 cvs_log(LP_TRACE, "cvs_repository_unlock(%s)", repo);
36
37 (void)xsnprintf(fpath, sizeof(fpath), "%s/%s", repo, CVS_LOCK);
38
39 if (unlink(fpath) == -1 && errno != ENOENT)
40 cvs_log(LP_ERR, "warning: failed to unlink %s", fpath);
41 }
42
43 void
cvs_repository_lock(const char * repo,int wantlock)44 cvs_repository_lock(const char *repo, int wantlock)
45 {
46 int i;
47 uid_t myuid;
48 struct stat st;
49 char fpath[PATH_MAX];
50 struct passwd *pw;
51
52 if (cvs_noexec == 1 || cvs_readonlyfs == 1)
53 return;
54
55 cvs_log(LP_TRACE, "cvs_repository_lock(%s, %d)", repo, wantlock);
56
57 (void)xsnprintf(fpath, sizeof(fpath), "%s/%s", repo, CVS_LOCK);
58
59 myuid = getuid();
60
61 for (i = 0; i < CVS_LOCK_TRIES; i++) {
62 if (cvs_quit)
63 fatal("received signal %d", sig_received);
64
65 if (stat(fpath, &st) == -1)
66 break;
67
68 if (st.st_uid == myuid)
69 return;
70
71 if ((pw = getpwuid(st.st_uid)) == NULL)
72 fatal("cvs_repository_lock: %s", strerror(errno));
73
74 cvs_log(LP_NOTICE, "waiting for %s's lock in '%s'",
75 pw->pw_name, repo);
76 sleep(CVS_LOCK_SLEEP);
77 }
78
79 if (i == CVS_LOCK_TRIES)
80 fatal("maximum wait time for lock inside '%s' reached", repo);
81
82 if (wantlock == 0)
83 return;
84
85 if ((i = open(fpath, O_WRONLY|O_CREAT|O_TRUNC, 0755)) == -1) {
86 if (errno == EEXIST)
87 fatal("cvs_repository_lock: somebody beat us");
88 else
89 fatal("cvs_repository_lock: %s: %s",
90 fpath, strerror(errno));
91 }
92
93 (void)close(i);
94 worklist_add(fpath, &repo_locks);
95 }
96
97 void
cvs_repository_getdir(const char * dir,const char * wdir,struct cvs_flisthead * fl,struct cvs_flisthead * dl,int flags)98 cvs_repository_getdir(const char *dir, const char *wdir,
99 struct cvs_flisthead *fl, struct cvs_flisthead *dl, int flags)
100 {
101 int type;
102 DIR *dirp;
103 struct stat st;
104 struct dirent *dp;
105 char *s, fpath[PATH_MAX], rpath[PATH_MAX];
106
107 if ((dirp = opendir(dir)) == NULL)
108 fatal("cvs_repository_getdir: failed to open '%s'", dir);
109
110 while ((dp = readdir(dirp)) != NULL) {
111 if (!strcmp(dp->d_name, ".") ||
112 !strcmp(dp->d_name, "..") ||
113 !strcmp(dp->d_name, CVS_LOCK))
114 continue;
115
116 (void)xsnprintf(fpath, PATH_MAX, "%s/%s", wdir, dp->d_name);
117 (void)xsnprintf(rpath, PATH_MAX, "%s/%s", dir, dp->d_name);
118
119 if (!TAILQ_EMPTY(&checkout_ign_pats)) {
120 if ((s = strrchr(fpath, ',')) != NULL)
121 *s = '\0';
122 if (cvs_file_chkign(fpath))
123 continue;
124 if (s != NULL)
125 *s = ',';
126 }
127
128 /*
129 * nfs and afs will show d_type as DT_UNKNOWN
130 * for files and/or directories so when we encounter
131 * this we call lstat() on the path to be sure.
132 */
133 if (dp->d_type == DT_UNKNOWN) {
134 if (lstat(rpath, &st) == -1)
135 fatal("'%s': %s", rpath, strerror(errno));
136
137 switch (st.st_mode & S_IFMT) {
138 case S_IFDIR:
139 type = CVS_DIR;
140 break;
141 case S_IFREG:
142 type = CVS_FILE;
143 break;
144 default:
145 fatal("Unknown file type in repository");
146 }
147 } else {
148 switch (dp->d_type) {
149 case DT_DIR:
150 type = CVS_DIR;
151 break;
152 case DT_REG:
153 type = CVS_FILE;
154 break;
155 default:
156 fatal("Unknown file type in repository");
157 }
158 }
159
160 if (!(flags & REPOSITORY_DODIRS) && type == CVS_DIR) {
161 if (strcmp(dp->d_name, CVS_PATH_ATTIC))
162 continue;
163 }
164
165 switch (type) {
166 case CVS_DIR:
167 if (!strcmp(dp->d_name, CVS_PATH_ATTIC)) {
168 cvs_repository_getdir(rpath, wdir, fl, dl,
169 REPOSITORY_IS_ATTIC);
170 } else {
171 cvs_file_get(fpath, 0, dl, CVS_DIR);
172 }
173 break;
174 case CVS_FILE:
175 if ((s = strrchr(fpath, ',')) != NULL &&
176 s != fpath && !strcmp(s, RCS_FILE_EXT)) {
177 *s = '\0';
178 cvs_file_get(fpath,
179 (flags & REPOSITORY_IS_ATTIC) ?
180 FILE_INSIDE_ATTIC : 0, fl, CVS_FILE);
181 }
182 break;
183 default:
184 fatal("type %d unknown, shouldn't happen", type);
185 }
186 }
187
188 (void)closedir(dirp);
189 }
190