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/* $NetBSD: conflicts.c,v 1.4.6.3 2008/08/06 12:58:22 joerg Exp $ */
/*-
* Copyright (c) 2007 Roland Illig <rillig@NetBSD.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. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``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
* COPYRIGHT HOLDERS OR CONTRIBUTORS 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.
*/
/*
* XXX: Reading the +CONTENTS files of all installed packages is
* rather slow. Since this check is necessary to avoid conflicting
* packages, it should not be removed.
*
* TODO: Put all the information that is currently in the +CONTENTS
* files into one large file or another database.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <nbcompat.h>
#if HAVE_SYS_CDEFS_H
#include <sys/cdefs.h>
#endif
__RCSID("$NetBSD: conflicts.c,v 1.4.6.3 2008/08/06 12:58:22 joerg Exp $");
#if HAVE_ERR_H
#include <err.h>
#endif
#include "dewey.h"
#include "lib.h"
/**
* Data structure to keep the intermediate result of the conflict
* search. ''pkgname'' is the package in question. The first
* installed package that conflicts is filled into
* ''conflicting_pkgname''. The pattern that leads to the conflict is
* also filled in to help the user in deciding what to do with the
* conflict.
*/
struct package_conflict {
const char *pkgname;
const char *skip_pkgname;
char **conflicting_pkgname;
char **conflicting_pattern;
};
static FILE *
fopen_contents(const char *pkgname, const char *mode)
{
char fname[MaxPathSize];
FILE *f;
snprintf(fname, sizeof(fname), "%s/%s/%s", _pkgdb_getPKGDB_DIR(), pkgname, CONTENTS_FNAME);
f = fopen(fname, mode);
if (f == NULL) {
err(EXIT_FAILURE, "%s", fname);
/* NOTREACHED */
}
return f;
}
static int
check_package_conflict(const char *pkgname, void *v)
{
struct package_conflict *conflict = v;
package_t pkg;
plist_t *p;
FILE *f;
int rv;
if (conflict->skip_pkgname != NULL &&
strcmp(conflict->skip_pkgname, pkgname) == 0)
return 0;
rv = 0;
pkg.head = NULL;
pkg.tail = NULL;
f = fopen_contents(pkgname, "r");
read_plist(&pkg, f);
(void)fclose(f);
for (p = pkg.head; p; p = p->next) {
if (p->type != PLIST_PKGCFL)
continue;
if (pkg_match(p->name, conflict->pkgname) == 1) {
*(conflict->conflicting_pkgname) = xstrdup(pkgname);
*(conflict->conflicting_pattern) = xstrdup(p->name);
rv = 1 /* nonzero, stop iterating */;
break;
}
}
free_plist(&pkg);
return rv;
}
/**
* Checks if some installed package has a pkgcfl entry that matches
* PkgName. If such an entry is found, the package name is returned in
* inst_pkgname, the matching pattern in inst_pattern, and the function
* returns a non-zero value. Otherwise, zero is returned and the result
* variables are set to NULL.
*/
int
some_installed_package_conflicts_with(const char *pkgname,
const char *skip_pkgname, char **inst_pkgname, char **inst_pattern)
{
struct package_conflict cfl;
int rv;
cfl.pkgname = pkgname;
cfl.skip_pkgname = skip_pkgname;
*inst_pkgname = NULL;
*inst_pattern = NULL;
cfl.conflicting_pkgname = inst_pkgname;
cfl.conflicting_pattern = inst_pattern;
rv = iterate_pkg_db(check_package_conflict, &cfl);
if (rv == -1) {
errx(EXIT_FAILURE, "Couldn't read list of installed packages.");
/* NOTREACHED */
}
return *inst_pkgname != NULL;
}
#if 0
int main(int argc, char **argv)
{
char *pkg, *patt;
if (some_installed_package_conflicts_with(argv[1], &pkg, &patt))
printf("yes: package %s conflicts with %s, pattern %s\n", pkg, argv[1], patt);
else
printf("no\n");
return 0;
}
void cleanup(int i) {}
#endif
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