repository.c revision 1.14 
1/*	$OpenBSD: repository.c,v 1.14 2007/07/03 13:22:43 joris 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
28struct cvs_wklhead repo_locks;
29
30void
31cvs_repository_unlock(const char *repo)
32{
33	char fpath[MAXPATHLEN];
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	/* XXX - this ok? */
40	cvs_worklist_run(&repo_locks, cvs_worklist_unlink);
41}
42
43void
44cvs_repository_lock(const char *repo)
45{
46	int i;
47	struct stat st;
48	char fpath[MAXPATHLEN];
49	struct passwd *pw;
50
51	if (cvs_noexec == 1 || cvs_readonlyfs == 1)
52		return;
53
54	cvs_log(LP_TRACE, "cvs_repository_lock(%s)", repo);
55
56	(void)xsnprintf(fpath, sizeof(fpath), "%s/%s", repo, CVS_LOCK);
57
58	for (i = 0; i < CVS_LOCK_TRIES; i++) {
59		if (cvs_quit)
60			fatal("received signal %d", sig_received);
61
62		if (stat(fpath, &st) == -1)
63			break;
64
65		if ((pw = getpwuid(st.st_uid)) == NULL)
66			fatal("cvs_repository_lock: %s", strerror(errno));
67
68		cvs_log(LP_NOTICE, "waiting for %s's lock in '%s'",
69		    pw->pw_name, repo);
70		sleep(CVS_LOCK_SLEEP);
71	}
72
73	if (i == CVS_LOCK_TRIES)
74		fatal("maximum wait time for lock inside '%s' reached", repo);
75
76	if ((i = open(fpath, O_WRONLY|O_CREAT|O_TRUNC, 0755)) < 0) {
77		if (errno == EEXIST)
78			fatal("cvs_repository_lock: somebody beat us");
79		else
80			fatal("cvs_repository_lock: %s: %s",
81			    fpath, strerror(errno));
82	}
83
84	(void)close(i);
85	cvs_worklist_add(fpath, &repo_locks);
86}
87
88void
89cvs_repository_getdir(const char *dir, const char *wdir,
90	struct cvs_flisthead *fl, struct cvs_flisthead *dl, int dodirs)
91{
92	int type;
93	DIR *dirp;
94	struct stat st;
95	struct dirent *dp;
96	char *s, fpath[MAXPATHLEN], rpath[MAXPATHLEN];
97
98	if ((dirp = opendir(dir)) == NULL)
99		fatal("cvs_repository_getdir: failed to open '%s'", dir);
100
101	while ((dp = readdir(dirp)) != NULL) {
102		if (!strcmp(dp->d_name, ".") ||
103		    !strcmp(dp->d_name, "..") ||
104		    !strcmp(dp->d_name, CVS_LOCK))
105			continue;
106
107		if (cvs_file_chkign(dp->d_name))
108			continue;
109
110		(void)xsnprintf(fpath, MAXPATHLEN, "%s/%s", wdir, dp->d_name);
111		(void)xsnprintf(rpath, MAXPATHLEN, "%s/%s", dir, dp->d_name);
112
113		/*
114		 * nfs and afs will show d_type as DT_UNKNOWN
115		 * for files and/or directories so when we encounter
116		 * this we call lstat() on the path to be sure.
117		 */
118		if (dp->d_type == DT_UNKNOWN) {
119			if (lstat(rpath, &st) == -1)
120				fatal("'%s': %s", rpath, strerror(errno));
121
122			switch (st.st_mode & S_IFMT) {
123			case S_IFDIR:
124				type = CVS_DIR;
125				break;
126			case S_IFREG:
127				type = CVS_FILE;
128				break;
129			default:
130				fatal("Unknown file type in repository");
131			}
132		} else {
133			switch (dp->d_type) {
134			case DT_DIR:
135				type = CVS_DIR;
136				break;
137			case DT_REG:
138				type = CVS_FILE;
139				break;
140			default:
141				fatal("Unknown file type in repository");
142			}
143		}
144
145		if (dodirs == 0 && type == CVS_DIR)
146			continue;
147
148		switch (type) {
149		case CVS_DIR:
150			if (!strcmp(dp->d_name, CVS_PATH_ATTIC))
151				cvs_repository_getdir(rpath, wdir, fl, dl, 0);
152			else
153				cvs_file_get(fpath, dl);
154			break;
155		case CVS_FILE:
156			if ((s = strrchr(fpath, ',')) != NULL)
157				*s = '\0';
158			cvs_file_get(fpath, fl);
159			break;
160		default:
161			fatal("type %d unknown, shouldn't happen", type);
162		}
163	}
164
165	(void)closedir(dirp);
166}
167