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-rw-r--r--src/trigger/main.c270
1 files changed, 270 insertions, 0 deletions
diff --git a/src/trigger/main.c b/src/trigger/main.c
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+++ b/src/trigger/main.c
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+/*
+ * dpkg-trigger - trigger management utility
+ *
+ * Copyright © 2007 Canonical Ltd.
+ * Written by Ian Jackson <ijackson@chiark.greenend.org.uk>
+ * Copyright © 2008-2014 Guillem Jover <guillem@debian.org>
+ *
+ * This 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 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 <fcntl.h>
+#if HAVE_LOCALE_H
+#include <locale.h>
+#endif
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include <dpkg/i18n.h>
+#include <dpkg/dpkg.h>
+#include <dpkg/dpkg-db.h>
+#include <dpkg/debug.h>
+#include <dpkg/options.h>
+#include <dpkg/trigdeferred.h>
+#include <dpkg/triglib.h>
+#include <dpkg/pkg-spec.h>
+
+static const char printforhelp[] = N_(
+"Type dpkg-trigger --help for help about this utility.");
+
+static int
+printversion(const char *const *argv)
+{
+ printf(_("Debian %s package trigger utility 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>...] <trigger-name>\n"
+" %s [<option>...] <command>\n"
+"\n"), dpkg_get_progname(), dpkg_get_progname());
+
+ printf(_(
+"Commands:\n"
+" --check-supported Check if the running dpkg supports triggers.\n"
+"\n"));
+
+ printf(_(
+" -?, --help Show this help message.\n"
+" --version Show the version.\n"
+"\n"));
+
+ printf(_(
+"Options:\n"
+" --admindir=<directory> Use <directory> instead of %s.\n"
+" --root=<directory> Use <directory> instead of %s.\n"
+" --by-package=<package> Override trigger awaiter (normally set\n"
+" by dpkg).\n"
+" --await Package needs to await the processing.\n"
+" --no-await No package needs to await the processing.\n"
+" --no-act Just test - don't actually change anything.\n"
+"\n"), ADMINDIR, "/");
+
+ m_output(stdout, _("<standard output>"));
+
+ return 0;
+}
+
+static int f_noact;
+static int f_await = 1;
+
+static const char *bypackage, *activate;
+static bool done_trig, ctrig;
+
+static void
+yespackage(const char *awname)
+{
+ trigdef_update_printf(" %s", awname);
+}
+
+static const char *
+parse_awaiter_package(void)
+{
+ struct dpkg_error err = DPKG_ERROR_INIT;
+ struct pkginfo *pkg;
+
+ if (!f_await)
+ bypackage = "-";
+
+ if (bypackage == NULL) {
+ const char *pkgname, *archname;
+
+ pkgname = getenv("DPKG_MAINTSCRIPT_PACKAGE");
+ archname = getenv("DPKG_MAINTSCRIPT_ARCH");
+ if (pkgname == NULL || archname == NULL)
+ badusage(_("must be called from a maintainer script"
+ " (or with a --by-package option)"));
+
+ pkg = pkg_spec_find_pkg(pkgname, archname, &err);
+ } else if (strcmp(bypackage, "-") == 0) {
+ pkg = NULL;
+ } else {
+ pkg = pkg_spec_parse_pkg(bypackage, &err);
+ }
+
+ /* Normalize the bypackage name if there was no error. */
+ if (pkg)
+ bypackage = pkg_name(pkg, pnaw_same);
+
+ return err.str;
+}
+
+static void
+tdm_add_trig_begin(const char *trig)
+{
+ ctrig = strcmp(trig, activate) == 0;
+ trigdef_update_printf("%s", trig);
+ if (!ctrig || done_trig)
+ return;
+ yespackage(bypackage);
+ done_trig = true;
+}
+
+static void
+tdm_add_package(const char *awname)
+{
+ if (ctrig && strcmp(awname, bypackage) == 0)
+ return;
+ yespackage(awname);
+}
+
+static void
+tdm_add_trig_end(void)
+{
+ trigdef_update_printf("\n");
+}
+
+static const struct trigdefmeths tdm_add = {
+ .trig_begin = tdm_add_trig_begin,
+ .package = tdm_add_package,
+ .trig_end = tdm_add_trig_end,
+};
+
+static int
+do_trigger(const char *const *argv)
+{
+ const char *badname;
+ enum trigdef_update_flags tduf;
+ enum trigdef_update_status tdus;
+
+ if (!*argv || argv[1])
+ badusage(_("takes one argument, the trigger name"));
+
+ badname = parse_awaiter_package();
+ if (badname)
+ badusage(_("illegal awaited package name '%.250s': %.250s"),
+ bypackage, badname);
+
+ activate = argv[0];
+ badname = trig_name_is_illegal(activate);
+ if (badname)
+ badusage(_("invalid trigger name '%.250s': %.250s"),
+ activate, badname);
+
+ trigdef_set_methods(&tdm_add);
+
+ tduf = TDUF_NO_LOCK_OK;
+ if (!f_noact)
+ tduf |= TDUF_WRITE | TDUF_WRITE_IF_EMPTY;
+ tdus = trigdef_update_start(tduf);
+ if (tdus >= 0) {
+ trigdef_parse();
+ if (!done_trig)
+ trigdef_update_printf("%s %s\n", activate, bypackage);
+ trigdef_process_done();
+ }
+
+ return 0;
+}
+
+static int
+do_check(const char *const *argv)
+{
+ enum trigdef_update_status uf;
+
+ if (*argv)
+ badusage(_("--%s takes no arguments"), "check-supported");
+
+ uf = trigdef_update_start(TDUF_NO_LOCK_OK);
+ switch (uf) {
+ case TDUS_ERROR_NO_DIR:
+ notice(_("triggers data directory not yet created"));
+ return 1;
+ case TDUS_ERROR_NO_DEFERRED:
+ notice(_("trigger records not yet in existence"));
+ return 1;
+ case TDUS_OK:
+ case TDUS_ERROR_EMPTY_DEFERRED:
+ return 0;
+ default:
+ internerr("unknown trigdef_update_start return value '%d'", uf);
+ }
+}
+
+static const struct cmdinfo cmdinfo_trigger =
+ ACTION("trigger", 0, 0, do_trigger);
+
+static const struct cmdinfo cmdinfos[] = {
+ ACTION("check-supported", 0, 0, do_check),
+ ACTION("help", '?', 0, usage),
+ ACTION("version", 0, 0, printversion),
+
+ { "admindir", 0, 1, NULL, NULL, set_admindir, 0 },
+ { "root", 0, 1, NULL, NULL, set_root, 0 },
+ { "by-package", 'f', 1, NULL, &bypackage },
+ { "await", 0, 0, &f_await, NULL, NULL, 1 },
+ { "no-await", 0, 0, &f_await, NULL, NULL, 0 },
+ { "no-act", 0, 0, &f_noact, NULL, NULL, 1 },
+ { NULL }
+};
+
+int
+main(int argc, const char *const *argv)
+{
+ int ret;
+
+ dpkg_locales_init(PACKAGE);
+ dpkg_program_init("dpkg-trigger");
+ dpkg_options_parse(&argv, cmdinfos, printforhelp);
+
+ debug(dbg_general, "root=%s admindir=%s", dpkg_fsys_get_dir(), dpkg_db_get_dir());
+
+ if (!cipaction)
+ setaction(&cmdinfo_trigger, NULL);
+
+ ret = cipaction->action(argv);
+
+ dpkg_program_done();
+ dpkg_locales_done();
+
+ return ret;
+}
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