Return to repository.c CVS log

Up to [local] / src / usr.bin / cvs

Replace <sys/param.h> with <limits.h> and other less dirty headers where
possible.  Annotate <sys/param.h> lines with their current reasons.  Switch
to PATH_MAX, NGROUPS_MAX, HOST_NAME_MAX+1, LOGIN_NAME_MAX, etc.  Change
MIN() and MAX() to local definitions of MINIMUM() and MAXIMUM() where
sensible to avoid pulling in the pollution.  These are the files confirmed
through binary verification.
ok guenther, millert, doug (helped with the verification protocol)

/*	$OpenBSD: repository.c,v 1.24 2015/01/16 06:40:07 deraadt Exp $	*/
/*
 * Copyright (c) 2006 Joris Vink <joris@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/stat.h>

#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <string.h>
#include <unistd.h>

#include "cvs.h"

struct wklhead repo_locks;

void
cvs_repository_unlock(const char *repo)
{
	char fpath[PATH_MAX];

	cvs_log(LP_TRACE, "cvs_repository_unlock(%s)", repo);

	(void)xsnprintf(fpath, sizeof(fpath), "%s/%s", repo, CVS_LOCK);

	/* XXX - this ok? */
	worklist_run(&repo_locks, worklist_unlink);
}

void
cvs_repository_lock(const char *repo, int wantlock)
{
	int i;
	uid_t myuid;
	struct stat st;
	char fpath[PATH_MAX];
	struct passwd *pw;

	if (cvs_noexec == 1 || cvs_readonlyfs == 1)
		return;

	cvs_log(LP_TRACE, "cvs_repository_lock(%s, %d)", repo, wantlock);

	(void)xsnprintf(fpath, sizeof(fpath), "%s/%s", repo, CVS_LOCK);

	myuid = getuid();

	for (i = 0; i < CVS_LOCK_TRIES; i++) {
		if (cvs_quit)
			fatal("received signal %d", sig_received);

		if (stat(fpath, &st) == -1)
			break;

		if (st.st_uid == myuid)
			return;

		if ((pw = getpwuid(st.st_uid)) == NULL)
			fatal("cvs_repository_lock: %s", strerror(errno));

		cvs_log(LP_NOTICE, "waiting for %s's lock in '%s'",
		    pw->pw_name, repo);
		sleep(CVS_LOCK_SLEEP);
	}

	if (i == CVS_LOCK_TRIES)
		fatal("maximum wait time for lock inside '%s' reached", repo);

	if (wantlock == 0)
		return;

	if ((i = open(fpath, O_WRONLY|O_CREAT|O_TRUNC, 0755)) < 0) {
		if (errno == EEXIST)
			fatal("cvs_repository_lock: somebody beat us");
		else
			fatal("cvs_repository_lock: %s: %s",
			    fpath, strerror(errno));
	}

	(void)close(i);
	worklist_add(fpath, &repo_locks);
}

void
cvs_repository_getdir(const char *dir, const char *wdir,
	struct cvs_flisthead *fl, struct cvs_flisthead *dl, int flags)
{
	int type;
	DIR *dirp;
	struct stat st;
	struct dirent *dp;
	char *s, fpath[PATH_MAX], rpath[PATH_MAX];

	if ((dirp = opendir(dir)) == NULL)
		fatal("cvs_repository_getdir: failed to open '%s'", dir);

	while ((dp = readdir(dirp)) != NULL) {
		if (!strcmp(dp->d_name, ".") ||
		    !strcmp(dp->d_name, "..") ||
		    !strcmp(dp->d_name, CVS_LOCK))
			continue;

		(void)xsnprintf(fpath, PATH_MAX, "%s/%s", wdir, dp->d_name);
		(void)xsnprintf(rpath, PATH_MAX, "%s/%s", dir, dp->d_name);

		if (!TAILQ_EMPTY(&checkout_ign_pats)) {
			if ((s = strrchr(fpath, ',')) != NULL)
				*s = '\0';
			if (cvs_file_chkign(fpath))
				continue;
			if (s != NULL)
				*s = ',';
		}

		/*
		 * nfs and afs will show d_type as DT_UNKNOWN
		 * for files and/or directories so when we encounter
		 * this we call lstat() on the path to be sure.
		 */
		if (dp->d_type == DT_UNKNOWN) {
			if (lstat(rpath, &st) == -1)
				fatal("'%s': %s", rpath, strerror(errno));

			switch (st.st_mode & S_IFMT) {
			case S_IFDIR:
				type = CVS_DIR;
				break;
			case S_IFREG:
				type = CVS_FILE;
				break;
			default:
				fatal("Unknown file type in repository");
			}
		} else {
			switch (dp->d_type) {
			case DT_DIR:
				type = CVS_DIR;
				break;
			case DT_REG:
				type = CVS_FILE;
				break;
			default:
				fatal("Unknown file type in repository");
			}
		}

		if (!(flags & REPOSITORY_DODIRS) && type == CVS_DIR) {
			if (strcmp(dp->d_name, CVS_PATH_ATTIC))
				continue;
		}

		switch (type) {
		case CVS_DIR:
			if (!strcmp(dp->d_name, CVS_PATH_ATTIC)) {
				cvs_repository_getdir(rpath, wdir, fl, dl,
				    REPOSITORY_IS_ATTIC);
			} else {
				cvs_file_get(fpath, 0, dl, CVS_DIR);
			}
			break;
		case CVS_FILE:
			if ((s = strrchr(fpath, ',')) != NULL &&
			    s != fpath && !strcmp(s, RCS_FILE_EXT)) {
				*s = '\0';
				cvs_file_get(fpath, 
				    (flags & REPOSITORY_IS_ATTIC) ?
				    FILE_INSIDE_ATTIC : 0, fl, CVS_FILE);
			}
			break;
		default:
			fatal("type %d unknown, shouldn't happen", type);
		}
	}

	(void)closedir(dirp);
}