1 files changed, 203 insertions, 0 deletions
diff --git a/src/systemd-binfmt/binfmt.c b/src/systemd-binfmt/binfmt.c
new file mode 100644
index 0000000000..eeef04fb1c
--- /dev/null
+++ b/src/systemd-binfmt/binfmt.c
@@ -0,0 +1,203 @@
+/***
+  This file is part of systemd.
+
+  Copyright 2010 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "alloc-util.h"
+#include "conf-files.h"
+#include "def.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "log.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
+
+static const char conf_file_dirs[] = CONF_PATHS_NULSTR("binfmt.d");
+
+static int delete_rule(const char *rule) {
+        _cleanup_free_ char *x = NULL, *fn = NULL;
+        char *e;
+
+        assert(rule[0]);
+
+        x = strdup(rule);
+        if (!x)
+                return log_oom();
+
+        e = strchrnul(x+1, x[0]);
+        *e = 0;
+
+        fn = strappend("/proc/sys/fs/binfmt_misc/", x+1);
+        if (!fn)
+                return log_oom();
+
+        return write_string_file(fn, "-1", 0);
+}
+
+static int apply_rule(const char *rule) {
+        int r;
+
+        delete_rule(rule);
+
+        r = write_string_file("/proc/sys/fs/binfmt_misc/register", rule, 0);
+        if (r < 0)
+                return log_error_errno(r, "Failed to add binary format: %m");
+
+        return 0;
+}
+
+static int apply_file(const char *path, bool ignore_enoent) {
+        _cleanup_fclose_ FILE *f = NULL;
+        int r;
+
+        assert(path);
+
+        r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f);
+        if (r < 0) {
+                if (ignore_enoent && r == -ENOENT)
+                        return 0;
+
+                return log_error_errno(r, "Failed to open file '%s', ignoring: %m", path);
+        }
+
+        log_debug("apply: %s", path);
+        for (;;) {
+                char l[LINE_MAX], *p;
+                int k;
+
+                if (!fgets(l, sizeof(l), f)) {
+                        if (feof(f))
+                                break;
+
+                        return log_error_errno(errno, "Failed to read file '%s', ignoring: %m", path);
+                }
+
+                p = strstrip(l);
+                if (!*p)
+                        continue;
+                if (strchr(COMMENTS "\n", *p))
+                        continue;
+
+                k = apply_rule(p);
+                if (k < 0 && r == 0)
+                        r = k;
+        }
+
+        return r;
+}
+
+static void help(void) {
+        printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
+               "Registers binary formats.\n\n"
+               "  -h --help             Show this help\n"
+               "     --version          Show package version\n"
+               , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_VERSION = 0x100,
+        };
+
+        static const struct option options[] = {
+                { "help",      no_argument,       NULL, 'h'           },
+                { "version",   no_argument,       NULL, ARG_VERSION   },
+                {}
+        };
+
+        int c;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
+
+                switch (c) {
+
+                case 'h':
+                        help();
+                        return 0;
+
+                case ARG_VERSION:
+                        return version();
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
+                }
+
+        return 1;
+}
+
+int main(int argc, char *argv[]) {
+        int r, k;
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+
+        log_set_target(LOG_TARGET_AUTO);
+        log_parse_environment();
+        log_open();
+
+        umask(0022);
+
+        r = 0;
+
+        if (argc > optind) {
+                int i;
+
+                for (i = optind; i < argc; i++) {
+                        k = apply_file(argv[i], false);
+                        if (k < 0 && r == 0)
+                                r = k;
+                }
+        } else {
+                _cleanup_strv_free_ char **files = NULL;
+                char **f;
+
+                r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
+                if (r < 0) {
+                        log_error_errno(r, "Failed to enumerate binfmt.d files: %m");
+                        goto finish;
+                }
+
+                /* Flush out all rules */
+                write_string_file("/proc/sys/fs/binfmt_misc/status", "-1", 0);
+
+                STRV_FOREACH(f, files) {
+                        k = apply_file(*f, true);
+                        if (k < 0 && r == 0)
+                                r = k;
+                }
+        }
+
+finish:
+        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}