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/*
* dropnroll
*
* Copyright (C) 2009-2015 Christian Pointner <equinox@spreadspace.org>
*
* This file is part of dropnroll.
*
* dropnroll 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 3 of the License, or
* any later version.
*
* dropnroll 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 dropnroll. If not, see <http://www.gnu.org/licenses/>.
*/
#include "datatypes.h"
#include <sys/un.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/inotify.h>
#include "log.h"
#include "utils.h"
int init_command_socket(const char* path)
{
int fd = socket(AF_UNIX, SOCK_STREAM, 0);
if(fd < 0) {
log_printf(ERROR, "unable to open socket: %s", strerror(errno));
return -1;
}
struct sockaddr_un local;
local.sun_family = AF_UNIX;
if(sizeof(local.sun_path) <= strlen(path)) {
log_printf(ERROR, "socket path is to long (max %d)", sizeof(local.sun_path)-1);
return -1;
}
strcpy(local.sun_path, path);
unlink(local.sun_path);
int len = SUN_LEN(&local);
int ret = bind(fd, (struct sockaddr*)&local, len);
if(ret) {
log_printf(ERROR, "unable to bind to '%s': %s", local.sun_path, strerror(errno));
return -1;
}
ret = listen(fd, 4);
if(ret) {
log_printf(ERROR, "unable to listen on command socket: %s", local.sun_path, strerror(errno));
return -1;
}
log_printf(INFO, "now listening on %s for incoming commands", path);
return fd;
}
int connect_command_socket(const char* path)
{
int fd = socket(AF_UNIX, SOCK_STREAM, 0);
if(fd < 0) {
log_printf(ERROR, "unable to open socket: %s", strerror(errno));
return -1;
}
struct sockaddr_un remote;
remote.sun_family = AF_UNIX;
if(sizeof(remote.sun_path) <= strlen(path)) {
log_printf(ERROR, "socket path is to long (max %d)", sizeof(remote.sun_path)-1);
return -1;
}
strcpy(remote.sun_path, path);
int len = SUN_LEN(&remote);
int ret = connect(fd, (struct sockaddr*)&remote, len);
if(ret) {
log_printf(ERROR, "unable to connect to '%s': %s", remote.sun_path, strerror(errno));
return -1;
}
return fd;
}
int send_string(int fd, const char* string)
{
int len = strlen(string);
int offset = 0;
int ret;
for(;;) {
ret = write(fd, &string[offset], len - offset);
if(ret < 0) {
if(errno != EINTR)
return ret;
ret = 0;
}
offset += ret;
if(offset+1 >= len)
break;
}
return ret;
}
int create_inotify()
{
int fd = inotify_init();
if(fd < 0) {
log_printf(ERROR, "error at inotify_init: %s", strerror(errno));
return -1;
}
int fs_flags = fcntl(fd, F_GETFL);
if(fs_flags == -1) {
log_printf(ERROR, "inotify init failed (fcntl read flags error: %s)", strerror(errno));
return -1;
}
if(fcntl(fd, F_SETFL, fs_flags | O_NONBLOCK) == -1) {
log_printf(ERROR, "inotify init failed (fcntl write flags error: %s)", strerror(errno));
return -1;
}
int fd_flags = fcntl(fd, F_GETFD);
if(fd_flags == -1) {
log_printf(ERROR, "inotify init failed (fcntl read flags error: %s)", strerror(errno));
return -1;
}
if(fcntl(fd, F_SETFD, fd_flags | FD_CLOEXEC) == -1) {
log_printf(ERROR, "inotify init failed (fcntl write flags error: %s)", strerror(errno));
return -1;
}
return fd;
}
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