170 lines
4.3 KiB
C
170 lines
4.3 KiB
C
/*-*- 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 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 <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;
|
|
|
|
log_set_target(LOG_TARGET_AUTO);
|
|
log_parse_environment();
|
|
log_open();
|
|
|
|
umask(0022);
|
|
|
|
if (argc > 1) {
|
|
int i;
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
int k;
|
|
|
|
k = apply_file(argv[i], false);
|
|
if (k < 0 && r == 0)
|
|
r = k;
|
|
}
|
|
} else {
|
|
char **files, **f;
|
|
|
|
r = conf_files_list(&files, ".conf",
|
|
"/etc/binfmt.d",
|
|
"/run/binfmt.d",
|
|
"/usr/local/lib/binfmt.d",
|
|
"/usr/lib/binfmt.d",
|
|
#ifdef HAVE_SPLIT_USR
|
|
"/lib/binfmt.d",
|
|
#endif
|
|
NULL);
|
|
if (r < 0) {
|
|
log_error("Failed to enumerate binfmt.d files: %s", strerror(-r));
|
|
goto finish;
|
|
}
|
|
|
|
/* Flush out all rules */
|
|
write_one_line_file("/proc/sys/fs/binfmt_misc/status", "-1");
|
|
|
|
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;
|
|
}
|