7dea05f507
If true, the in memory pkgdb dict will be updated with data from the on-disk pkgdb.
440 lines
11 KiB
C
440 lines
11 KiB
C
/*-
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* Copyright (c) 2012-2015 Juan Romero Pardines.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "xbps_api_impl.h"
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/**
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* @file lib/pkgdb.c
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* @brief Package database handling routines
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* @defgroup pkgdb Package database handling functions
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*
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* Functions to manipulate the main package database plist file (pkgdb).
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*
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* The following image shown below shows the proplib structure used
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* by the main package database plist:
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*
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* @image html images/xbps_pkgdb_dictionary.png
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*
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* Legend:
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* - <b>Salmon filled box</b>: \a pkgdb plist internalized.
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* - <b>White filled box</b>: mandatory objects.
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* - <b>Grey filled box</b>: optional objects.
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* - <b>Green filled box</b>: possible value set in the object, only one
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* of them is set.
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*
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* Text inside of white boxes are the key associated with the object, its
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* data type is specified on its edge, i.e array, bool, integer, string,
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* dictionary.
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*/
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static int pkgdb_fd;
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int
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xbps_pkgdb_lock(struct xbps_handle *xhp)
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{
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int rv;
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/*
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* Use a mandatory file lock to only allow one writer to pkgdb,
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* other writers will block.
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*/
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xhp->pkgdb_plist = xbps_xasprintf("%s/%s", xhp->metadir, XBPS_PKGDB);
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if (xbps_pkgdb_init(xhp) == ENOENT) {
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/* if metadir does not exist, create it */
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if (access(xhp->metadir, R_OK|X_OK) == -1) {
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if (errno != ENOENT)
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return errno;
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if (xbps_mkpath(xhp->metadir, 0755) == -1) {
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rv = errno;
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xbps_dbg_printf(xhp, "[pkgdb] failed to create metadir "
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"%s: %s\n", xhp->metadir, strerror(rv));
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return rv;
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}
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}
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/* if pkgdb is unexistent, create it with an empty dictionary */
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xhp->pkgdb = xbps_dictionary_create();
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if (!xbps_dictionary_externalize_to_file(xhp->pkgdb, xhp->pkgdb_plist)) {
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rv = errno;
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xbps_dbg_printf(xhp, "[pkgdb] failed to create pkgdb "
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"%s: %s\n", xhp->pkgdb_plist, strerror(rv));
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return rv;
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}
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}
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if ((pkgdb_fd = open(xhp->pkgdb_plist, O_CREAT|O_RDWR, 0664)) == -1) {
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rv = errno;
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xbps_dbg_printf(xhp, "[pkgdb] cannot open pkgdb for locking "
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"%s: %s\n", xhp->pkgdb_plist, strerror(rv));
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free(xhp->pkgdb_plist);
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return rv;
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}
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if (lockf(pkgdb_fd, F_TLOCK, 0) == -1) {
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rv = errno;
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xbps_dbg_printf(xhp, "[pkgdb] cannot lock pkgdb: %s\n", strerror(rv));
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return rv;
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}
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return 0;
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}
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void
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xbps_pkgdb_unlock(struct xbps_handle *xhp)
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{
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(void)xbps_pkgdb_update(xhp, true, false);
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if (pkgdb_fd != -1) {
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if (lockf(pkgdb_fd, F_ULOCK, 0) == -1)
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xbps_dbg_printf(xhp, "[pkgdb] failed to unlock pkgdb: %s\n", strerror(errno));
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(void)close(pkgdb_fd);
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pkgdb_fd = -1;
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}
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}
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static int
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pkgdb_map_vpkgs(struct xbps_handle *xhp)
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{
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xbps_object_iterator_t iter;
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xbps_object_t obj;
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int rv = 0;
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if (!xbps_dictionary_count(xhp->pkgdb))
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return 0;
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if (xhp->vpkgd == NULL) {
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xhp->vpkgd = xbps_dictionary_create();
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assert(xhp->vpkgd);
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}
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/*
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* This maps all pkgs that have virtualpkgs in pkgdb.
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*/
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iter = xbps_dictionary_iterator(xhp->pkgdb);
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assert(iter);
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while ((obj = xbps_object_iterator_next(iter))) {
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xbps_array_t provides;
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xbps_dictionary_t pkgd;
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const char *pkgver;
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char *pkgname;
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pkgd = xbps_dictionary_get_keysym(xhp->pkgdb, obj);
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provides = xbps_dictionary_get(pkgd, "provides");
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if (provides == NULL)
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continue;
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xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver);
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pkgname = xbps_pkg_name(pkgver);
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for (unsigned int i = 0; i < xbps_array_count(provides); i++) {
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const char *vpkg;
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xbps_array_get_cstring_nocopy(provides, i, &vpkg);
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if (!xbps_dictionary_set_cstring(xhp->vpkgd, vpkg, pkgname)) {
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xbps_dbg_printf(xhp, "%s: set_cstring vpkg "
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"%s pkgname %s\n", __func__, vpkg, pkgname);
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rv = EINVAL;
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} else {
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xbps_dbg_printf(xhp, "[pkgdb] added vpkg %s for %s\n",
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vpkg, pkgname);
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}
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}
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free(pkgname);
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}
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xbps_object_iterator_release(iter);
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return rv;
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}
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int HIDDEN
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xbps_pkgdb_init(struct xbps_handle *xhp)
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{
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int rv;
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assert(xhp != NULL);
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if (xhp->pkgdb_plist == NULL)
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xhp->pkgdb_plist = xbps_xasprintf("%s/%s", xhp->metadir, XBPS_PKGDB);
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#if 0
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if ((rv = xbps_pkgdb_conversion(xhp)) != 0)
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return rv;
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#endif
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if (xhp->pkgdb != NULL)
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return 0;
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if ((rv = xbps_pkgdb_update(xhp, false, true)) != 0) {
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if (rv != ENOENT)
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xbps_dbg_printf(xhp, "[pkgdb] cannot internalize "
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"pkgdb array: %s\n", strerror(rv));
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return rv;
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}
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if ((rv = pkgdb_map_vpkgs(xhp)) != 0) {
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xbps_dbg_printf(xhp, "[pkgdb] pkgdb_map_vpkgs %s\n", strerror(rv));
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return rv;
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}
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xbps_dbg_printf(xhp, "[pkgdb] initialized ok.\n");
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return 0;
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}
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int
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xbps_pkgdb_update(struct xbps_handle *xhp, bool flush, bool update)
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{
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xbps_dictionary_t pkgdb_storage;
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static int cached_rv;
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int rv = 0;
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if (cached_rv && !flush)
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return cached_rv;
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if (xhp->pkgdb && update) {
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pkgdb_storage = xbps_dictionary_internalize_from_file(xhp->pkgdb_plist);
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if (pkgdb_storage == NULL ||
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!xbps_dictionary_equals(xhp->pkgdb, pkgdb_storage)) {
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/* flush dictionary to storage */
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if (!xbps_dictionary_externalize_to_file(xhp->pkgdb, xhp->pkgdb_plist))
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return errno;
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}
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if (pkgdb_storage)
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xbps_object_release(pkgdb_storage);
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xbps_object_release(xhp->pkgdb);
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xhp->pkgdb = NULL;
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cached_rv = 0;
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}
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if (!update)
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return rv;
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/* update copy in memory */
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if ((xhp->pkgdb = xbps_dictionary_internalize_from_file(xhp->pkgdb_plist)) == NULL) {
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if (errno == ENOENT)
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xhp->pkgdb = xbps_dictionary_create();
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else
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xbps_error_printf("cannot access to pkgdb: %s\n", strerror(errno));
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cached_rv = rv = errno;
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}
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return rv;
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}
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void HIDDEN
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xbps_pkgdb_release(struct xbps_handle *xhp)
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{
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assert(xhp != NULL);
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if (xhp->pkgdb == NULL)
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return;
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if (xhp->pkgdb_revdeps)
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xbps_object_release(xhp->pkgdb_revdeps);
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if (xhp->vpkgd)
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xbps_object_release(xhp->vpkgd);
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if (xhp->preserved_files)
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xbps_object_release(xhp->preserved_files);
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xbps_pkgdb_unlock(xhp);
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xbps_object_release(xhp->pkgdb);
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xbps_dbg_printf(xhp, "[pkgdb] released ok.\n");
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}
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int
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xbps_pkgdb_foreach_cb(struct xbps_handle *xhp,
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int (*fn)(struct xbps_handle *, xbps_object_t, const char *, void *, bool *),
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void *arg)
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{
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xbps_array_t allkeys;
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int rv;
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if ((rv = xbps_pkgdb_init(xhp)) != 0)
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return rv;
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allkeys = xbps_dictionary_all_keys(xhp->pkgdb);
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assert(allkeys);
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rv = xbps_array_foreach_cb(xhp, allkeys, xhp->pkgdb, fn, arg);
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xbps_object_release(allkeys);
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return rv;
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}
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int
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xbps_pkgdb_foreach_cb_multi(struct xbps_handle *xhp,
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int (*fn)(struct xbps_handle *, xbps_object_t, const char *, void *, bool *),
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void *arg)
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{
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xbps_array_t allkeys;
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int rv;
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if ((rv = xbps_pkgdb_init(xhp)) != 0)
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return rv;
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allkeys = xbps_dictionary_all_keys(xhp->pkgdb);
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assert(allkeys);
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rv = xbps_array_foreach_cb_multi(xhp, allkeys, xhp->pkgdb, fn, arg);
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xbps_object_release(allkeys);
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return rv;
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}
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xbps_dictionary_t
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xbps_pkgdb_get_pkg(struct xbps_handle *xhp, const char *pkg)
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{
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if (xbps_pkgdb_init(xhp) != 0)
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return NULL;
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return xbps_find_pkg_in_dict(xhp->pkgdb, pkg);
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}
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xbps_dictionary_t
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xbps_pkgdb_get_virtualpkg(struct xbps_handle *xhp, const char *vpkg)
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{
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if (xbps_pkgdb_init(xhp) != 0)
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return NULL;
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return xbps_find_virtualpkg_in_dict(xhp, xhp->pkgdb, vpkg);
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}
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static void
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generate_full_revdeps_tree(struct xbps_handle *xhp)
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{
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xbps_object_t obj;
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xbps_object_iterator_t iter;
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if (xhp->pkgdb_revdeps)
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return;
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xhp->pkgdb_revdeps = xbps_dictionary_create();
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assert(xhp->pkgdb_revdeps);
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iter = xbps_dictionary_iterator(xhp->pkgdb);
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assert(iter);
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while ((obj = xbps_object_iterator_next(iter))) {
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xbps_array_t rundeps;
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xbps_dictionary_t pkgd;
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const char *pkgver;
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pkgd = xbps_dictionary_get_keysym(xhp->pkgdb, obj);
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rundeps = xbps_dictionary_get(pkgd, "run_depends");
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if (!xbps_array_count(rundeps))
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continue;
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xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver);
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for (unsigned int i = 0; i < xbps_array_count(rundeps); i++) {
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xbps_array_t pkg;
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const char *pkgdep, *vpkgname;
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char *curpkgname;
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bool alloc = false;
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xbps_array_get_cstring_nocopy(rundeps, i, &pkgdep);
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curpkgname = xbps_pkgpattern_name(pkgdep);
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if (curpkgname == NULL)
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curpkgname = xbps_pkg_name(pkgdep);
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assert(curpkgname);
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vpkgname = vpkg_user_conf(xhp, curpkgname);
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if (vpkgname == NULL)
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vpkgname = curpkgname;
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pkg = xbps_dictionary_get(xhp->pkgdb_revdeps, vpkgname);
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if (pkg == NULL) {
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alloc = true;
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pkg = xbps_array_create();
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}
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if (!xbps_match_string_in_array(pkg, pkgver)) {
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xbps_array_add_cstring_nocopy(pkg, pkgver);
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xbps_dictionary_set(xhp->pkgdb_revdeps, vpkgname, pkg);
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}
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free(curpkgname);
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if (alloc)
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xbps_object_release(pkg);
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}
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}
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xbps_object_iterator_release(iter);
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}
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xbps_array_t
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xbps_pkgdb_get_pkg_revdeps(struct xbps_handle *xhp, const char *pkg)
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{
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xbps_array_t res;
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xbps_dictionary_t pkgd;
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const char *pkgver;
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char *pkgname;
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if ((pkgd = xbps_pkgdb_get_pkg(xhp, pkg)) == NULL)
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return NULL;
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generate_full_revdeps_tree(xhp);
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xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver);
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if ((pkgname = xbps_pkg_name(pkgver)) == NULL)
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return NULL;
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res = xbps_dictionary_get(xhp->pkgdb_revdeps, pkgname);
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free(pkgname);
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return res;
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}
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xbps_array_t
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xbps_pkgdb_get_pkg_fulldeptree(struct xbps_handle *xhp, const char *pkg)
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{
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return xbps_get_pkg_fulldeptree(xhp, pkg, false);
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}
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xbps_dictionary_t
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xbps_pkgdb_get_pkg_files(struct xbps_handle *xhp, const char *pkg)
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{
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xbps_dictionary_t pkgd, pkgfilesd;
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const char *pkgver;
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char *pkgname, *plist;
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if (pkg == NULL)
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return NULL;
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pkgd = xbps_pkgdb_get_pkg(xhp, pkg);
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if (pkgd == NULL)
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return NULL;
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xbps_dictionary_get_cstring_nocopy(pkgd, "pkgver", &pkgver);
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pkgname = xbps_pkg_name(pkgver);
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assert(pkgname);
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plist = xbps_xasprintf("%s/.%s-files.plist", xhp->metadir, pkgname);
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free(pkgname);
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pkgfilesd = xbps_dictionary_internalize_from_zfile(plist);
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free(plist);
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if (pkgfilesd == NULL) {
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xbps_dbg_printf(xhp, "[pkgdb] cannot read %s metadata: %s\n",
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pkgver, strerror(errno));
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return NULL;
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}
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return pkgfilesd;
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}
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