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/*-*- 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;
}
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