spioutils.cpp
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/*
* Copyright 2007 Stephen Liu
* For license terms, see the file COPYING along with this library.
*/
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "spporting.hpp"
#include "spioutils.hpp"
void SP_IOUtils :: inetNtoa( in_addr * addr, char * ip, int size )
{
#if defined (linux) || defined (__sgi) || defined (__hpux) \
|| defined (__FreeBSD__) || defined (__APPLE__)
const unsigned char *p = ( const unsigned char *) addr;
snprintf( ip, size, "%i.%i.%i.%i", p[0], p[1], p[2], p[3] );
#else
snprintf( ip, size, "%i.%i.%i.%i", addr->s_net, addr->s_host, addr->s_lh, addr->s_impno );
#endif
}
int SP_IOUtils :: setNonblock( int fd )
{
#ifdef WIN32
unsigned long nonblocking = 1;
ioctlsocket( fd, FIONBIO, (unsigned long*) &nonblocking );
#else
int flags;
flags = fcntl( fd, F_GETFL );
if( flags < 0 ) return flags;
flags |= O_NONBLOCK;
if( fcntl( fd, F_SETFL, flags ) < 0 ) return -1;
#endif
return 0;
}
int SP_IOUtils :: setBlock( int fd )
{
#ifdef WIN32
unsigned long nonblocking = 0;
ioctlsocket( fd, FIONBIO, (unsigned long*) &nonblocking );
#else
int flags;
flags = fcntl( fd, F_GETFL );
if( flags < 0 ) return flags;
flags &= ~O_NONBLOCK;
if( fcntl( fd, F_SETFL, flags ) < 0 ) return -1;
#endif
return 0;
}
int SP_IOUtils :: tcpListen( const char * ip, int port, int * fd, int blocking )
{
int ret = 0;
int listenFd = socket( AF_INET, SOCK_STREAM, 0 );
if( listenFd < 0 ) {
sp_syslog( LOG_WARNING, "socket failed, errno %d, %s", errno, strerror( errno ) );
ret = -1;
}
if( 0 == ret && 0 == blocking ) {
if( setNonblock( listenFd ) < 0 ) {
sp_syslog( LOG_WARNING, "failed to set socket to non-blocking" );
ret = -1;
}
}
if( 0 == ret ) {
int flags = 1;
if( setsockopt( listenFd, SOL_SOCKET, SO_REUSEADDR, (char*)&flags, sizeof( flags ) ) < 0 ) {
sp_syslog( LOG_WARNING, "failed to set setsock to reuseaddr" );
ret = -1;
}
if( setsockopt( listenFd, IPPROTO_TCP, TCP_NODELAY, (char*)&flags, sizeof(flags) ) < 0 ) {
sp_syslog( LOG_WARNING, "failed to set socket to nodelay" );
ret = -1;
}
}
struct sockaddr_in addr;
if( 0 == ret ) {
memset( &addr, 0, sizeof( addr ) );
addr.sin_family = AF_INET;
addr.sin_port = htons( port );
addr.sin_addr.s_addr = INADDR_ANY;
if( '\0' != *ip ) {
if( 0 == sp_inet_aton( ip, &addr.sin_addr ) ) {
sp_syslog( LOG_WARNING, "failed to convert %s to inet_addr", ip );
ret = -1;
}
}
}
if( 0 == ret ) {
if( bind( listenFd, (struct sockaddr*)&addr, sizeof( addr ) ) < 0 ) {
sp_syslog( LOG_WARNING, "bind failed, errno %d, %s", errno, strerror( errno ) );
ret = -1;
}
}
if( 0 == ret ) {
if( ::listen( listenFd, 1024 ) < 0 ) {
sp_syslog( LOG_WARNING, "listen failed, errno %d, %s", errno, strerror( errno ) );
ret = -1;
}
}
if( 0 != ret && listenFd >= 0 ) sp_close( listenFd );
if( 0 == ret ) {
* fd = listenFd;
sp_syslog( LOG_NOTICE, "Listen on port [%d]", port );
}
return ret;
}
int SP_IOUtils :: tcpListen( const char * path, int * fd, int blocking, int mode )
{
int ret = 0;
#ifndef WIN32
struct sockaddr_un addr;
memset( &addr, 0, sizeof( addr ) );
if( strlen( path ) > ( sizeof( addr.sun_path ) - 1 ) ) {
sp_syslog( LOG_WARNING, "UNIX socket name %s too long", path );
return -1;
}
if( 0 == access( path, F_OK ) ) {
if( 0 != unlink( path ) ) {
sp_syslog( LOG_WARNING, "unlink %s failed, errno %d, %s",
path, errno, strerror( errno ) );
return -1;
}
}
addr.sun_family = AF_UNIX;
strncpy( addr.sun_path, path, sizeof( addr.sun_path ) - 1 );
int listenFd = socket( AF_UNIX, SOCK_STREAM, 0 );
if( listenFd < 0 ) {
sp_syslog( LOG_WARNING, "listen failed, errno %d, %s", errno, strerror( errno ) );
ret = -1;
}
if( 0 == ret && 0 == blocking ) {
if( setNonblock( listenFd ) < 0 ) {
sp_syslog( LOG_WARNING, "failed to set socket to non-blocking" );
ret = -1;
}
}
if( 0 == ret ) {
int flags = 1;
if( setsockopt( listenFd, SOL_SOCKET, SO_REUSEADDR, (char*)&flags, sizeof( flags ) ) < 0 ) {
sp_syslog( LOG_WARNING, "failed to set setsock to reuseaddr" );
ret = -1;
}
}
if( 0 == ret ) {
if( bind( listenFd, (struct sockaddr*)&addr, sizeof( addr ) ) < 0 ) {
sp_syslog( LOG_WARNING, "bind failed, errno %d, %s", errno, strerror( errno ) );
ret = -1;
}
}
if( 0 == ret ) {
if( ::listen( listenFd, 1024 ) < 0 ) {
sp_syslog( LOG_WARNING, "listen failed, errno %d, %s", errno, strerror( errno ) );
ret = -1;
}
}
if( 0 != ret && listenFd >= 0 ) sp_close( listenFd );
if( 0 == ret ) {
* fd = listenFd;
if( mode > 0 ) {
if( 0 != fchmod( *fd, (mode_t)mode ) ) {
sp_syslog( LOG_WARNING, "fchmod fail, errno %d, %s", errno, strerror( errno ) );
}
}
sp_syslog( LOG_NOTICE, "Listen on [%s]", path );
}
#endif
return ret;
}
int SP_IOUtils :: initDaemon( const char * workdir )
{
#ifndef WIN32
int i;
pid_t pid;
if ( (pid = fork()) < 0)
return (-1);
else if (pid)
_exit(0); /* parent terminates */
/* child 1 continues... */
if (setsid() < 0) /* become session leader */
return (-1);
assert( signal( SIGHUP, SIG_IGN ) != SIG_ERR );
assert( signal( SIGPIPE, SIG_IGN ) != SIG_ERR );
assert( signal( SIGALRM, SIG_IGN ) != SIG_ERR );
assert( signal( SIGCHLD, SIG_IGN ) != SIG_ERR );
if ( (pid = fork()) < 0)
return (-1);
else if (pid)
_exit(0); /* child 1 terminates */
/* child 2 continues... */
if( NULL != workdir ) chdir( workdir ); /* change working directory */
/* close off file descriptors */
for (i = 0; i < 64; i++)
close(i);
/* redirect stdin, stdout, and stderr to /dev/null */
open("/dev/null", O_RDONLY);
open("/dev/null", O_RDWR);
open("/dev/null", O_RDWR);
#endif
return (0); /* success */
}