110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
/*
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*
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* Wireless daemon for Linux
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*
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* Copyright (C) 2021 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <ell/ell.h>
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#include "src/sysfs.h"
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static int write_string(const char *file, const char *value)
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{
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size_t l = strlen(value);
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int fd;
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int r;
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fd = L_TFR(open(file, O_WRONLY));
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if (fd < 0)
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return -errno;
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r = L_TFR(write(fd, value, l));
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L_TFR(close(fd));
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return r;
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}
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static bool sysfs_supports_ip_setting(const char *ipv, const char *ifname,
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const char *setting)
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{
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struct stat st;
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int err;
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L_AUTO_FREE_VAR(char *, file) =
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l_strdup_printf("/proc/sys/net/%s/conf/%s/%s", ipv,
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ifname, setting);
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err = stat(file, &st);
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if (!err && S_ISREG(st.st_mode) != 0)
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return true;
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return false;
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}
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bool sysfs_supports_ipv6_setting(const char *ifname, const char *setting)
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{
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return sysfs_supports_ip_setting("ipv6", ifname, setting);
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}
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int sysfs_write_ipv6_setting(const char *ifname, const char *setting,
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const char *value)
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{
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int r;
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L_AUTO_FREE_VAR(char *, file) =
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l_strdup_printf("/proc/sys/net/ipv6/conf/%s/%s",
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ifname, setting);
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r = write_string(file, value);
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if (r < 0)
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l_error("Unable to write %s to %s", setting, file);
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return r;
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}
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bool sysfs_supports_ipv4_setting(const char *ifname, const char *setting)
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{
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return sysfs_supports_ip_setting("ipv4", ifname, setting);
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}
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int sysfs_write_ipv4_setting(const char *ifname, const char *setting,
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const char *value)
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{
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int r;
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L_AUTO_FREE_VAR(char *, file) =
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l_strdup_printf("/proc/sys/net/ipv4/conf/%s/%s",
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ifname, setting);
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r = write_string(file, value);
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if (r < 0)
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l_error("Unable to write %s to %s", setting, file);
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return r;
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}
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