Уничтожение дочернего процесса

Доброго времени суток. Есть код демона - принимает файл и отправляет на обработку.

#include "listener.h"

#include "ssl.h"

#include <signal.h>

void clean_up_child_process( int signal_number ) {

int status;

wait( &status );

}

void server_start( struct conn_inf *data_conn ) {

int err;

int exit_code;

int connection;

int server_connection;

pid_t child_pid;

size_t client_len;

socklen_t address_length;

struct sigaction sigchld_action;

struct sockaddr_in sa_serv;

struct sockaddr_in sa_cli;

exit_code = 0;

memset( &sigchld_action, 0, sizeof( sigchld_action ) );

sigchld_action.sa_handler = &clean_up_child_process;

sigaction( SIGCHLD, &sigchld_action, NULL );

server_connection = socket( AF_INET, SOCK_STREAM, 0 );

CHK_ERR( server_connection, "socket" );

memset( &sa_serv, '\0', sizeof( sa_serv ) );

sa_serv.sin_family = AF_INET;

sa_serv.sin_addr = data_conn->addr;

sa_serv.sin_port = data_conn->port;

err = bind( server_connection, (struct sockaddr*)&sa_serv, sizeof( sa_serv ) );

CHK_ERR( err, "bind" );

err = listen( server_connection, 5 );

CHK_ERR( err, "listen" );

if ( data_conn->verbose == 1 ) {

address_length = sizeof( sa_serv );

err = getsockname( server_connection, (struct sockaddr*)&sa_serv, &address_length );

fprintf( stderr, "server listening on %s:%d.\n", inet_ntoa( sa_serv.sin_addr ), (int)ntohs( sa_serv.sin_port ) );

}

while ( 1 ) {

client_len = sizeof( sa_cli );

connection = accept( server_connection, (struct sockaddr*)&sa_cli, &client_len );

CHK_ERR( connection , "accept" );

/* fork child process */

if ( data_conn->verbose == 1 ) {

address_length = sizeof( sa_serv ); err = getpeername( connection, (struct sockaddr*)&sa_serv, &address_length );

fprintf( stderr, "Connection from %s\n", inet_ntoa( sa_serv.sin_addr ) );

}

child_pid = fork();

if ( child_pid == 0 ) { close( server_connection );

close( STDIN_FILENO );

close( STDOUT_FILENO );

exit_code = handler_connection( connection, data_conn );

close( connection );

exit( exit_code );

} else if ( child_pid > 0 ) {

close( connection );

} else {

perror ( "Could not create child process.\n" );

}

}

}

Пока не включаю обработку сигнала завершения дочернего процесса все работает, после включения выдает - прерванного системного вызова. Код обработки SIGCHLD взят из примера.