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/* $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);
}
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