summaryrefslogtreecommitdiffstats
path: root/src/divert/main.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:58:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:58:51 +0000
commitcbffab246997fb5a06211dfb706b54e5ae5bb59f (patch)
tree0573c5d96f58d74d76a49c0f2a70398e389a36d3 /src/divert/main.c
parentInitial commit. (diff)
downloaddpkg-cbffab246997fb5a06211dfb706b54e5ae5bb59f.tar.xz
dpkg-cbffab246997fb5a06211dfb706b54e5ae5bb59f.zip
Adding upstream version 1.21.22.upstream/1.21.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/divert/main.c')
-rw-r--r--src/divert/main.c884
1 files changed, 884 insertions, 0 deletions
diff --git a/src/divert/main.c b/src/divert/main.c
new file mode 100644
index 0000000..865796d
--- /dev/null
+++ b/src/divert/main.c
@@ -0,0 +1,884 @@
+/*
+ * dpkg-divert - override a package's version of a file
+ *
+ * Copyright © 1995 Ian Jackson
+ * Copyright © 2000, 2001 Wichert Akkerman
+ * Copyright © 2006-2015, 2017-2018 Guillem Jover <guillem@debian.org>
+ * Copyright © 2011 Linaro Limited
+ * Copyright © 2011 Raphaël Hertzog <hertzog@debian.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <compat.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+#if HAVE_LOCALE_H
+#include <locale.h>
+#endif
+#include <fcntl.h>
+#include <fnmatch.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <dpkg/i18n.h>
+#include <dpkg/dpkg.h>
+#include <dpkg/dpkg-db.h>
+#include <dpkg/debug.h>
+#include <dpkg/arch.h>
+#include <dpkg/file.h>
+#include <dpkg/glob.h>
+#include <dpkg/buffer.h>
+#include <dpkg/options.h>
+#include <dpkg/db-fsys.h>
+
+
+static const char printforhelp[] = N_(
+"Use --help for help about diverting files.");
+
+static bool opt_pkgname_match_any = true;
+static const char *opt_pkgname = NULL;
+static const char *opt_divertto = NULL;
+
+static int opt_verbose = 1;
+static int opt_test = 0;
+static int opt_rename = -1;
+
+
+static int
+printversion(const char *const *argv)
+{
+ printf(_("Debian %s version %s.\n"), dpkg_get_progname(),
+ PACKAGE_RELEASE);
+
+ printf(_(
+"This is free software; see the GNU General Public License version 2 or\n"
+"later for copying conditions. There is NO warranty.\n"));
+
+ m_output(stdout, _("<standard output>"));
+
+ return 0;
+}
+
+static int
+usage(const char *const *argv)
+{
+ printf(_(
+"Usage: %s [<option>...] <command>\n"
+"\n"), dpkg_get_progname());
+
+ printf(_(
+"Commands:\n"
+" [--add] <file> add a diversion.\n"
+" --remove <file> remove the diversion.\n"
+" --list [<glob-pattern>] show file diversions.\n"
+" --listpackage <file> show what package diverts the file.\n"
+" --truename <file> return the diverted file.\n"
+"\n"));
+
+ printf(_(
+"Options:\n"
+" --package <package> name of the package whose copy of <file> will not\n"
+" be diverted.\n"
+" --local all packages' versions are diverted.\n"
+" --divert <divert-to> the name used by other packages' versions.\n"
+" --rename actually move the file aside (or back).\n"
+" --no-rename do not move the file aside (or back) (default).\n"
+" --admindir <directory> set the directory with the diversions file.\n"
+" --instdir <directory> set the root directory, but not the admin dir.\n"
+" --root <directory> set the directory of the root filesystem.\n"
+" --test don't do anything, just demonstrate.\n"
+" --quiet quiet operation, minimal output.\n"
+" --help show this help message.\n"
+" --version show the version.\n"
+"\n"));
+
+ printf(_(
+"When adding, default is --local and --divert <original>.distrib.\n"
+"When removing, --package or --local and --divert must match if specified.\n"
+"Package preinst/postrm scripts should always specify --package and --divert.\n"));
+
+ m_output(stdout, _("<standard output>"));
+
+ return 0;
+}
+
+static void
+opt_rename_setup(void)
+{
+ if (opt_rename >= 0)
+ return;
+
+ opt_rename = 0;
+ warning(_("please specify --no-rename explicitly, the default "
+ "will change to --rename in 1.20.x"));
+}
+
+struct file {
+ char *name;
+ enum {
+ FILE_STAT_INVALID,
+ FILE_STAT_VALID,
+ FILE_STAT_NOFILE,
+ } stat_state;
+ struct stat stat;
+};
+
+static void
+file_init(struct file *f, const char *filename)
+{
+ struct varbuf usefilename = VARBUF_INIT;
+
+ varbuf_add_str(&usefilename, dpkg_fsys_get_dir());
+ varbuf_add_str(&usefilename, filename);
+ varbuf_end_str(&usefilename);
+
+ f->name = varbuf_detach(&usefilename);
+ f->stat_state = FILE_STAT_INVALID;
+}
+
+static void
+file_destroy(struct file *f)
+{
+ free(f->name);
+}
+
+static void
+file_stat(struct file *f)
+{
+ int ret;
+
+ if (f->stat_state != FILE_STAT_INVALID)
+ return;
+
+ ret = lstat(f->name, &f->stat);
+ if (ret && errno != ENOENT)
+ ohshite(_("cannot stat file '%s'"), f->name);
+
+ if (ret == 0)
+ f->stat_state = FILE_STAT_VALID;
+ else
+ f->stat_state = FILE_STAT_NOFILE;
+}
+
+static void
+check_writable_dir(struct file *f)
+{
+ char *tmpname;
+ int tmpfd;
+
+ tmpname = str_fmt("%s%s", f->name, ".dpkg-divert.tmp");
+
+ tmpfd = creat(tmpname, 0600);
+ if (tmpfd < 0)
+ ohshite(_("error checking '%s'"), f->name);
+ close(tmpfd);
+ (void)unlink(tmpname);
+
+ free(tmpname);
+}
+
+static bool
+check_rename(struct file *src, struct file *dst)
+{
+ file_stat(src);
+
+ /* If the source file is not present and we are not going to do
+ * the rename anyway there's no point in checking any further. */
+ if (src->stat_state == FILE_STAT_NOFILE)
+ return false;
+
+ file_stat(dst);
+
+ /*
+ * Unfortunately we have to check for write access in both places,
+ * just having +w is not enough, since people do mount things RO,
+ * and we need to fail before we start mucking around with things.
+ * So we open a file with the same name as the diversions but with
+ * an extension that (hopefully) won't overwrite anything. If it
+ * succeeds, we assume a writable filesystem.
+ */
+
+ check_writable_dir(src);
+ check_writable_dir(dst);
+
+ if (src->stat_state == FILE_STAT_VALID &&
+ dst->stat_state == FILE_STAT_VALID &&
+ !(src->stat.st_dev == dst->stat.st_dev &&
+ src->stat.st_ino == dst->stat.st_ino))
+ ohshit(_("rename involves overwriting '%s' with\n"
+ " different file '%s', not allowed"),
+ dst->name, src->name);
+
+ return true;
+}
+
+static void
+file_copy(const char *src, const char *dst)
+{
+ struct dpkg_error err;
+ char *tmp;
+ int srcfd, dstfd;
+
+ srcfd = open(src, O_RDONLY);
+ if (srcfd < 0)
+ ohshite(_("unable to open file '%s'"), src);
+
+ tmp = str_fmt("%s%s", dst, ".dpkg-divert.tmp");
+ dstfd = creat(tmp, 0600);
+ if (dstfd < 0)
+ ohshite(_("unable to create file '%s'"), tmp);
+
+ push_cleanup(cu_filename, ~ehflag_normaltidy, 1, tmp);
+
+ if (fd_fd_copy(srcfd, dstfd, -1, &err) < 0)
+ ohshit(_("cannot copy '%s' to '%s': %s"), src, tmp, err.str);
+
+ close(srcfd);
+
+ if (fsync(dstfd))
+ ohshite(_("unable to sync file '%s'"), tmp);
+ if (close(dstfd))
+ ohshite(_("unable to close file '%s'"), tmp);
+
+ file_copy_perms(src, tmp);
+
+ if (rename(tmp, dst) != 0)
+ ohshite(_("cannot rename '%s' to '%s'"), tmp, dst);
+
+ free(tmp);
+
+ pop_cleanup(ehflag_normaltidy);
+}
+
+static void
+file_rename(struct file *src, struct file *dst)
+{
+ if (src->stat_state == FILE_STAT_NOFILE)
+ return;
+
+ if (dst->stat_state == FILE_STAT_VALID) {
+ if (unlink(src->name))
+ ohshite(_("rename: remove duplicate old link '%s'"),
+ src->name);
+ } else {
+ if (rename(src->name, dst->name) == 0)
+ return;
+
+ /* If a rename didn't work try moving the file instead. */
+ file_copy(src->name, dst->name);
+
+ if (unlink(src->name))
+ ohshite(_("unable to remove copied source file '%s'"),
+ src->name);
+ }
+}
+
+static void
+diversion_check_filename(const char *filename)
+{
+ if (filename[0] != '/')
+ badusage(_("filename \"%s\" is not absolute"), filename);
+ if (strchr(filename, '\n') != NULL)
+ badusage(_("file may not contain newlines"));
+}
+
+static const char *
+diversion_pkg_name(struct fsys_diversion *d)
+{
+ if (d->pkgset == NULL)
+ return ":";
+ else
+ return d->pkgset->name;
+}
+
+static const char *
+varbuf_diversion(struct varbuf *str, const char *pkgname,
+ const char *filename, const char *divertto)
+{
+ varbuf_reset(str);
+
+ if (pkgname == NULL) {
+ if (divertto == NULL)
+ varbuf_printf(str, _("local diversion of %s"), filename);
+ else
+ varbuf_printf(str, _("local diversion of %s to %s"),
+ filename, divertto);
+ } else {
+ if (divertto == NULL)
+ varbuf_printf(str, _("diversion of %s by %s"),
+ filename, pkgname);
+ else
+ varbuf_printf(str, _("diversion of %s to %s by %s"),
+ filename, divertto, pkgname);
+ }
+
+ return str->buf;
+}
+
+static const char *
+diversion_current(const char *filename)
+{
+ static struct varbuf str = VARBUF_INIT;
+
+ if (opt_pkgname_match_any) {
+ varbuf_reset(&str);
+
+ if (opt_divertto == NULL)
+ varbuf_printf(&str, _("any diversion of %s"), filename);
+ else
+ varbuf_printf(&str, _("any diversion of %s to %s"),
+ filename, opt_divertto);
+ } else {
+ return varbuf_diversion(&str, opt_pkgname, filename, opt_divertto);
+ }
+
+ return str.buf;
+}
+
+static const char *
+diversion_describe(struct fsys_diversion *d)
+{
+ static struct varbuf str = VARBUF_INIT;
+ const char *pkgname;
+ const char *name_from, *name_to;
+
+ if (d->camefrom) {
+ name_from = d->camefrom->name;
+ name_to = d->camefrom->divert->useinstead->name;
+ } else {
+ name_from = d->useinstead->divert->camefrom->name;
+ name_to = d->useinstead->name;
+ }
+
+ if (d->pkgset == NULL)
+ pkgname = NULL;
+ else
+ pkgname = d->pkgset->name;
+
+ return varbuf_diversion(&str, pkgname, name_from, name_to);
+}
+
+static void
+divertdb_write(void)
+{
+ char *dbname;
+ struct atomic_file *file;
+ struct fsys_hash_iter *iter;
+ struct fsys_namenode *namenode;
+
+ dbname = dpkg_db_get_path(DIVERSIONSFILE);
+
+ file = atomic_file_new(dbname, ATOMIC_FILE_BACKUP);
+ atomic_file_open(file);
+
+ iter = fsys_hash_iter_new();
+ while ((namenode = fsys_hash_iter_next(iter))) {
+ struct fsys_diversion *d = namenode->divert;
+
+ if (d == NULL || d->useinstead == NULL)
+ continue;
+
+ fprintf(file->fp, "%s\n%s\n%s\n",
+ d->useinstead->divert->camefrom->name,
+ d->useinstead->name,
+ diversion_pkg_name(d));
+ }
+ fsys_hash_iter_free(iter);
+
+ atomic_file_sync(file);
+ atomic_file_close(file);
+ atomic_file_commit(file);
+ atomic_file_free(file);
+
+ free(dbname);
+}
+
+static bool
+diversion_is_essential(struct fsys_namenode *namenode)
+{
+ struct pkginfo *pkg;
+ struct pkg_hash_iter *pkg_iter;
+ struct fsys_node_pkgs_iter *iter;
+ bool essential = false;
+
+ pkg_iter = pkg_hash_iter_new();
+ while ((pkg = pkg_hash_iter_next_pkg(pkg_iter))) {
+ if (pkg->installed.essential)
+ ensure_packagefiles_available(pkg);
+ }
+ pkg_hash_iter_free(pkg_iter);
+
+ iter = fsys_node_pkgs_iter_new(namenode);
+ while ((pkg = fsys_node_pkgs_iter_next(iter))) {
+ if (pkg->installed.essential) {
+ essential = true;
+ break;
+ }
+ }
+ fsys_node_pkgs_iter_free(iter);
+
+ return essential;
+}
+
+static bool
+diversion_is_owned_by_self(struct pkgset *set, struct fsys_namenode *namenode)
+{
+ struct pkginfo *pkg;
+ struct fsys_node_pkgs_iter *iter;
+ bool owned = false;
+
+ if (set == NULL)
+ return false;
+
+ for (pkg = &set->pkg; pkg; pkg = pkg->arch_next)
+ ensure_packagefiles_available(pkg);
+
+ iter = fsys_node_pkgs_iter_new(namenode);
+ while ((pkg = fsys_node_pkgs_iter_next(iter))) {
+ if (pkg->set == set) {
+ owned = true;
+ break;
+ }
+ }
+ fsys_node_pkgs_iter_free(iter);
+
+ return owned;
+}
+
+static int
+diversion_add(const char *const *argv)
+{
+ const char *filename = argv[0];
+ struct file file_from, file_to;
+ struct fsys_diversion *contest, *altname;
+ struct fsys_namenode *fnn_from, *fnn_to;
+ struct pkgset *pkgset;
+
+ opt_pkgname_match_any = false;
+ opt_rename_setup();
+
+ /* Handle filename. */
+ if (!filename || argv[1])
+ badusage(_("--%s needs a single argument"), cipaction->olong);
+
+ diversion_check_filename(filename);
+
+ modstatdb_open(msdbrw_readonly);
+ ensure_diversions();
+
+ file_init(&file_from, filename);
+ file_stat(&file_from);
+
+ if (file_from.stat_state == FILE_STAT_VALID &&
+ S_ISDIR(file_from.stat.st_mode))
+ badusage(_("cannot divert directories"));
+
+ fnn_from = fsys_hash_find_node(filename, 0);
+
+ /* Handle divertto. */
+ if (opt_divertto == NULL)
+ opt_divertto = str_fmt("%s.distrib", filename);
+
+ if (strcmp(filename, opt_divertto) == 0)
+ badusage(_("cannot divert file '%s' to itself"), filename);
+
+ file_init(&file_to, opt_divertto);
+
+ fnn_to = fsys_hash_find_node(opt_divertto, 0);
+
+ /* Handle package name. */
+ if (opt_pkgname == NULL)
+ pkgset = NULL;
+ else
+ pkgset = pkg_hash_find_set(opt_pkgname);
+
+ /* Check we are not stomping over an existing diversion. */
+ if (fnn_from->divert || fnn_to->divert) {
+ if (fnn_to->divert && fnn_to->divert->camefrom &&
+ strcmp(fnn_to->divert->camefrom->name, filename) == 0 &&
+ fnn_from->divert && fnn_from->divert->useinstead &&
+ strcmp(fnn_from->divert->useinstead->name, opt_divertto) == 0 &&
+ fnn_from->divert->pkgset == pkgset) {
+ if (opt_verbose > 0)
+ printf(_("Leaving '%s'\n"),
+ diversion_describe(fnn_from->divert));
+
+ file_destroy(&file_from);
+ file_destroy(&file_to);
+
+ modstatdb_shutdown();
+
+ return 0;
+ }
+
+ ohshit(_("'%s' clashes with '%s'"),
+ diversion_current(filename),
+ fnn_from->divert ?
+ diversion_describe(fnn_from->divert) :
+ diversion_describe(fnn_to->divert));
+ }
+
+ /* Create new diversion. */
+ contest = nfmalloc(sizeof(*contest));
+ altname = nfmalloc(sizeof(*altname));
+
+ altname->camefrom = fnn_from;
+ altname->camefrom->divert = contest;
+ altname->useinstead = NULL;
+ altname->pkgset = pkgset;
+
+ contest->useinstead = fnn_to;
+ contest->useinstead->divert = altname;
+ contest->camefrom = NULL;
+ contest->pkgset = pkgset;
+
+ /* Update database and file system if needed. */
+ if (opt_verbose > 0)
+ printf(_("Adding '%s'\n"), diversion_describe(contest));
+ if (opt_rename)
+ opt_rename = check_rename(&file_from, &file_to);
+ /* Check we are not renaming a file owned by the diverting pkgset. */
+ if (opt_rename && diversion_is_owned_by_self(pkgset, fnn_from)) {
+ if (opt_verbose > 0)
+ printf(_("Ignoring request to rename file '%s' "
+ "owned by diverting package '%s'\n"),
+ filename, pkgset->name);
+ opt_rename = false;
+ }
+ if (opt_rename && diversion_is_essential(fnn_from))
+ warning(_("diverting file '%s' from an Essential package with "
+ "rename is dangerous, use --no-rename"), filename);
+ if (!opt_test) {
+ divertdb_write();
+ if (opt_rename)
+ file_rename(&file_from, &file_to);
+ }
+
+ file_destroy(&file_from);
+ file_destroy(&file_to);
+
+ modstatdb_shutdown();
+
+ return 0;
+}
+
+static bool
+diversion_is_shared(struct pkgset *set, struct fsys_namenode *namenode)
+{
+ const char *archname;
+ struct pkginfo *pkg;
+ struct dpkg_arch *arch;
+ struct fsys_node_pkgs_iter *iter;
+ bool shared = false;
+
+ if (set == NULL)
+ return false;
+
+ archname = getenv("DPKG_MAINTSCRIPT_ARCH");
+ arch = dpkg_arch_find(archname);
+ if (arch->type == DPKG_ARCH_NONE || arch->type == DPKG_ARCH_EMPTY)
+ return false;
+
+ for (pkg = &set->pkg; pkg; pkg = pkg->arch_next)
+ ensure_packagefiles_available(pkg);
+
+ iter = fsys_node_pkgs_iter_new(namenode);
+ while ((pkg = fsys_node_pkgs_iter_next(iter))) {
+ if (pkg->set == set && pkg->installed.arch != arch) {
+ shared = true;
+ break;
+ }
+ }
+ fsys_node_pkgs_iter_free(iter);
+
+ return shared;
+}
+
+static int
+diversion_remove(const char *const *argv)
+{
+ const char *filename = argv[0];
+ struct fsys_namenode *namenode;
+ struct fsys_diversion *contest, *altname;
+ struct file file_from, file_to;
+ struct pkgset *pkgset;
+
+ opt_rename_setup();
+
+ if (!filename || argv[1])
+ badusage(_("--%s needs a single argument"), cipaction->olong);
+
+ diversion_check_filename(filename);
+
+ modstatdb_open(msdbrw_readonly);
+ ensure_diversions();
+
+ namenode = fsys_hash_find_node(filename, FHFF_NONE);
+
+ if (namenode == NULL || namenode->divert == NULL ||
+ namenode->divert->useinstead == NULL) {
+ if (opt_verbose > 0)
+ printf(_("No diversion '%s', none removed.\n"),
+ diversion_current(filename));
+ modstatdb_shutdown();
+ return 0;
+ }
+
+ if (opt_pkgname == NULL)
+ pkgset = NULL;
+ else
+ pkgset = pkg_hash_find_set(opt_pkgname);
+
+ contest = namenode->divert;
+ altname = contest->useinstead->divert;
+
+ if (opt_divertto != NULL &&
+ strcmp(opt_divertto, contest->useinstead->name) != 0)
+ ohshit(_("mismatch on divert-to\n"
+ " when removing '%s'\n"
+ " found '%s'"),
+ diversion_current(filename),
+ diversion_describe(contest));
+
+ if (!opt_pkgname_match_any && pkgset != contest->pkgset)
+ ohshit(_("mismatch on package\n"
+ " when removing '%s'\n"
+ " found '%s'"),
+ diversion_current(filename),
+ diversion_describe(contest));
+
+ /* Ignore removal request if the diverted file is still owned
+ * by another package in the same set. */
+ if (diversion_is_shared(pkgset, namenode)) {
+ if (opt_verbose > 0)
+ printf(_("Ignoring request to remove shared diversion '%s'.\n"),
+ diversion_describe(contest));
+ modstatdb_shutdown();
+ return 0;
+ }
+
+ if (opt_verbose > 0)
+ printf(_("Removing '%s'\n"), diversion_describe(contest));
+
+ file_init(&file_from, altname->camefrom->name);
+ file_init(&file_to, contest->useinstead->name);
+
+ /* Remove entries from database. */
+ contest->useinstead->divert = NULL;
+ altname->camefrom->divert = NULL;
+
+ if (opt_rename)
+ opt_rename = check_rename(&file_to, &file_from);
+ if (opt_rename && !opt_test)
+ file_rename(&file_to, &file_from);
+
+ if (!opt_test)
+ divertdb_write();
+
+ file_destroy(&file_from);
+ file_destroy(&file_to);
+
+ modstatdb_shutdown();
+
+ return 0;
+}
+
+static int
+diversion_list(const char *const *argv)
+{
+ struct fsys_hash_iter *iter;
+ struct fsys_namenode *namenode;
+ struct glob_node *glob_list = NULL;
+ const char *pattern;
+
+ modstatdb_open(msdbrw_readonly);
+ ensure_diversions();
+
+ while ((pattern = *argv++))
+ glob_list_prepend(&glob_list, m_strdup(pattern));
+
+ if (glob_list == NULL)
+ glob_list_prepend(&glob_list, m_strdup("*"));
+
+ iter = fsys_hash_iter_new();
+ while ((namenode = fsys_hash_iter_next(iter))) {
+ struct glob_node *g;
+ struct fsys_diversion *contest = namenode->divert;
+ struct fsys_diversion *altname;
+ const char *pkgname;
+
+ if (contest == NULL || contest->useinstead == NULL)
+ continue;
+
+ altname = contest->useinstead->divert;
+
+ pkgname = diversion_pkg_name(contest);
+
+ for (g = glob_list; g; g = g->next) {
+ if (fnmatch(g->pattern, pkgname, 0) == 0 ||
+ fnmatch(g->pattern, contest->useinstead->name, 0) == 0 ||
+ fnmatch(g->pattern, altname->camefrom->name, 0) == 0) {
+ printf("%s\n", diversion_describe(contest));
+ break;
+ }
+ }
+ }
+ fsys_hash_iter_free(iter);
+
+ glob_list_free(glob_list);
+
+ modstatdb_shutdown();
+
+ return 0;
+}
+
+static int
+diversion_truename(const char *const *argv)
+{
+ const char *filename = argv[0];
+ struct fsys_namenode *namenode;
+
+ if (!filename || argv[1])
+ badusage(_("--%s needs a single argument"), cipaction->olong);
+
+ diversion_check_filename(filename);
+
+ modstatdb_open(msdbrw_readonly);
+ ensure_diversions();
+
+ namenode = fsys_hash_find_node(filename, FHFF_NONE);
+
+ /* Print the given name if file is not diverted. */
+ if (namenode && namenode->divert && namenode->divert->useinstead)
+ printf("%s\n", namenode->divert->useinstead->name);
+ else
+ printf("%s\n", filename);
+
+ modstatdb_shutdown();
+
+ return 0;
+}
+
+static int
+diversion_listpackage(const char *const *argv)
+{
+ const char *filename = argv[0];
+ struct fsys_namenode *namenode;
+
+ if (!filename || argv[1])
+ badusage(_("--%s needs a single argument"), cipaction->olong);
+
+ diversion_check_filename(filename);
+
+ modstatdb_open(msdbrw_readonly);
+ ensure_diversions();
+
+ namenode = fsys_hash_find_node(filename, FHFF_NONE);
+
+ /* Print nothing if file is not diverted. */
+ if (namenode == NULL || namenode->divert == NULL)
+ return 0;
+
+ if (namenode->divert->pkgset == NULL)
+ /* Indicate package is local using something not in package
+ * namespace. */
+ printf("LOCAL\n");
+ else
+ printf("%s\n", namenode->divert->pkgset->name);
+
+ modstatdb_shutdown();
+
+ return 0;
+}
+
+static void
+set_package(const struct cmdinfo *cip, const char *value)
+{
+ opt_pkgname_match_any = false;
+
+ /* If value is NULL we are being called from --local. */
+ opt_pkgname = value;
+
+ if (opt_pkgname && strchr(opt_pkgname, '\n') != NULL)
+ badusage(_("package may not contain newlines"));
+}
+
+static void
+set_divertto(const struct cmdinfo *cip, const char *value)
+{
+ opt_divertto = value;
+
+ if (opt_divertto[0] != '/')
+ badusage(_("filename \"%s\" is not absolute"), opt_divertto);
+ if (strchr(opt_divertto, '\n') != NULL)
+ badusage(_("divert-to may not contain newlines"));
+}
+
+static const struct cmdinfo cmdinfo_add =
+ ACTION("add", 0, 0, diversion_add);
+
+static const struct cmdinfo cmdinfos[] = {
+ ACTION("add", 0, 0, diversion_add),
+ ACTION("remove", 0, 0, diversion_remove),
+ ACTION("list", 0, 0, diversion_list),
+ ACTION("listpackage", 0, 0, diversion_listpackage),
+ ACTION("truename", 0, 0, diversion_truename),
+ ACTION("help", '?', 0, usage),
+ ACTION("version", 0, 0, printversion),
+
+ { "admindir", 0, 1, NULL, NULL, set_admindir, 0 },
+ { "instdir", 0, 1, NULL, NULL, set_instdir, 0 },
+ { "root", 0, 1, NULL, NULL, set_root, 0 },
+ { "divert", 0, 1, NULL, NULL, set_divertto },
+ { "package", 0, 1, NULL, NULL, set_package },
+ { "local", 0, 0, NULL, NULL, set_package },
+ { "quiet", 0, 0, &opt_verbose, NULL, NULL, 0 },
+ { "rename", 0, 0, &opt_rename, NULL, NULL, 1 },
+ { "no-rename", 0, 0, &opt_rename, NULL, NULL, 0 },
+ { "test", 0, 0, &opt_test, NULL, NULL, 1 },
+ { NULL, 0 }
+};
+
+int
+main(int argc, const char * const *argv)
+{
+ const char *env_pkgname;
+ int ret;
+
+ dpkg_locales_init(PACKAGE);
+ dpkg_program_init("dpkg-divert");
+ dpkg_options_parse(&argv, cmdinfos, printforhelp);
+
+ debug(dbg_general, "root=%s admindir=%s", dpkg_fsys_get_dir(), dpkg_db_get_dir());
+
+ env_pkgname = getenv("DPKG_MAINTSCRIPT_PACKAGE");
+ if (opt_pkgname_match_any && env_pkgname)
+ set_package(NULL, env_pkgname);
+
+ if (!cipaction)
+ setaction(&cmdinfo_add, NULL);
+
+ ret = cipaction->action(argv);
+
+ dpkg_program_done();
+ dpkg_locales_done();
+
+ return ret;
+}