Return to root.c CVS log

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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: root.c,v 1.48 2015/01/16 06:40:07 deraadt 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_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.
 */
static struct cvsroot *
cvsroot_parse(const char *str)
{
	u_int i;
	char *cp, *sp, *pp;
	const char *errstr;
	static struct cvsroot *root = NULL;

	if (root != NULL)
		return (root);

	root = xcalloc(1, sizeof(*root));
	root->cr_method = CVS_METHOD_NONE;
	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 */
		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;
	}

	return (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)
{
	char rootpath[PATH_MAX], *rootstr, line[128];
	FILE *fp;

	if (cvs_rootstr != NULL)
		return cvsroot_parse(cvs_rootstr);

	if (cvs_server_active == 1)
		return cvsroot_parse(dir);

	if (cvs_cmdop == CVS_OP_IMPORT) {
		if ((rootstr = getenv("CVSROOT")) != NULL)
			return (cvsroot_parse(rootstr));
		return (NULL);
	}

	(void)xsnprintf(rootpath, PATH_MAX, "%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);

	line[strcspn(line, "\n")] = '\0';
	if (line[0] == '\0')
		cvs_log(LP_ERR, "empty %s file", CVS_PATH_ROOTSPEC);

	return cvsroot_parse(line);
}