/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** 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 General Public License as published by the Free Software Foundation; either version 2 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 General Public License for more details. You should have received a copy of the GNU General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdlib.h> #include <stdbool.h> #include <errno.h> #include <string.h> #include <stdio.h> #include <limits.h> #include <stdarg.h> #include "log.h" #include "hashmap.h" #include "strv.h" #include "util.h" static int delete_rule(const char *rule) { char *x, *fn = NULL, *e; int r; assert(rule[0]); if (!(x = strdup(rule))) return -ENOMEM; e = strchrnul(x+1, x[0]); *e = 0; asprintf(&fn, "/proc/sys/fs/binfmt_misc/%s", x+1); free(x); if (!fn) return -ENOMEM; r = write_one_line_file(fn, "-1"); free(fn); return r; } static int apply_rule(const char *rule) { int r; delete_rule(rule); if ((r = write_one_line_file("/proc/sys/fs/binfmt_misc/register", rule)) < 0) { log_error("Failed to add binary format: %s", strerror(-r)); return r; } return 0; } static int apply_file(const char *path, bool ignore_enoent) { FILE *f; int r = 0; assert(path); if (!(f = fopen(path, "re"))) { if (ignore_enoent && errno == ENOENT) return 0; log_error("Failed to open file '%s', ignoring: %m", path); return -errno; } log_debug("apply: %s\n", path); while (!feof(f)) { char l[LINE_MAX], *p; int k; if (!fgets(l, sizeof(l), f)) { if (feof(f)) break; log_error("Failed to read file '%s', ignoring: %m", path); r = -errno; goto finish; } p = strstrip(l); if (!*p) continue; if (strchr(COMMENTS, *p)) continue; if ((k = apply_rule(p)) < 0 && r == 0) r = k; } finish: fclose(f); return r; } int main(int argc, char *argv[]) { int r = 0; if (argc > 2) { log_error("This program expects one or no arguments."); return EXIT_FAILURE; } log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); umask(0022); if (argc > 1) { r = apply_file(argv[1], false); } else { char **files, **f; /* Flush out all rules */ write_one_line_file("/proc/sys/fs/binfmt_misc/status", "-1"); r = conf_files_list(&files, ".conf", "/run/binfmt.d", "/etc/binfmt.d", "/usr/local/lib/binfmt.d", "/usr/lib/binfmt.d", NULL); if (r < 0) { log_error("Failed to enumerate binfmt.d files: %s", strerror(-r)); goto finish; } STRV_FOREACH(f, files) { int k; k = apply_file(*f, true); if (k < 0 && r == 0) r = k; } strv_free(files); } finish: return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }