c33b329709
Basically:
find . -name '*.[ch]' | while read f; do perl -i.mmm -e \
'local $/;
local $_=<>;
s/log_(debug|info|notice|warning|error|emergency)\("([^"]*)%s"([^;]*),\s*strerror\(-?([->a-zA-Z_]+)\)\);/log_\1_errno(\4, "\2%m"\3);/gms;print;' \
$f; done
Plus manual indentation fixups.
107 lines
2.9 KiB
C
107 lines
2.9 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 <sys/socket.h>
|
|
#include <net/if.h>
|
|
#include <asm/types.h>
|
|
#include <netinet/in.h>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
#include "macro.h"
|
|
#include "loopback-setup.h"
|
|
#include "socket-util.h"
|
|
#include "sd-rtnl.h"
|
|
#include "rtnl-util.h"
|
|
|
|
/* this is hardcoded in the kernel, so don't look it up */
|
|
#define LOOPBACK_IFINDEX 1
|
|
|
|
static int start_loopback(sd_rtnl *rtnl) {
|
|
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
|
|
int r;
|
|
|
|
r = sd_rtnl_message_new_link(rtnl, &req, RTM_SETLINK, LOOPBACK_IFINDEX);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = sd_rtnl_call(rtnl, req, 0, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int check_loopback(void) {
|
|
int r;
|
|
_cleanup_close_ int fd = -1;
|
|
union {
|
|
struct sockaddr sa;
|
|
struct sockaddr_in in;
|
|
} sa = {
|
|
.in.sin_family = AF_INET,
|
|
.in.sin_addr.s_addr = INADDR_LOOPBACK,
|
|
};
|
|
|
|
/* If we failed to set up the loop back device, check whether
|
|
* it might already be set up */
|
|
|
|
fd = socket(AF_INET, SOCK_DGRAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0);
|
|
if (fd < 0)
|
|
return -errno;
|
|
|
|
if (bind(fd, &sa.sa, sizeof(sa.in)) >= 0)
|
|
r = 1;
|
|
else
|
|
r = errno == EADDRNOTAVAIL ? 0 : -errno;
|
|
|
|
return r;
|
|
}
|
|
|
|
int loopback_setup(void) {
|
|
_cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
|
|
int r;
|
|
|
|
r = sd_rtnl_open(&rtnl, 0);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
r = start_loopback(rtnl);
|
|
if (r == -EPERM) {
|
|
if (check_loopback() < 0) {
|
|
log_warning_errno(EPERM, "Failed to configure loopback device: %m");
|
|
return -EPERM;
|
|
}
|
|
} else if (r < 0) {
|
|
log_warning_errno(r, "Failed to configure loopback device: %m");
|
|
return r;
|
|
}
|
|
|
|
|
|
return 0;
|
|
}
|