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  fcntl(fd, F_SETSIG, SIGRTMIN + 1);
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  fcntl(fd, F_NOTIFY, DN_ACCESS|DN_MODIFY|DN_CREATE|DN_RENAME|DN_DELETE|DN_ATTRIB|DN_MULTISHOT);
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//ÒªÓÃfcntl( fd, F_SETSIG, SIGRTMIN + 1 )¾ÍÒªÉèÖÃÕâ¸öºê
#define _GNU_SOURCE 1
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#define FOLDER_MAXLEN 128
static char listen_folder[FOLDER_MAXLEN];
static void myhandler( int );
int set_folder_signal( void )
{
struct sigaction act;
int fd;
act.sa_handler = myhandler;
sigemptyset( &act.sa_mask );
act.sa_flags = 0;
sigaction( SIGRTMIN + 1, &act, NULL );
if(( fd = open( listen_folder, O_RDONLY )) < 0 )
return -1;
printf( "fd=%d\n", fd );
fcntl( fd, F_SETSIG, SIGRTMIN + 1 );
fcntl( fd, F_NOTIFY, DN_CREATE );
return 0;
}
int main(int argc, char *argv[] )
{
if( argc != 2 )
{
printf( "%s filepath\n", argv[0] );
exit( 0 );
}
strncpy( listen_folder, argv[1], FOLDER_MAXLEN - 1 );
if( set_folder_signal( ) < 0 )
{
printf( "set signal to %s fail\n", argv[1] );
exit( 0 );
}
while( 1 )
{
pause();
printf( "a signal return\n" );
}
}
static void myhandler( int signo )
{
printf( "signalno=%d,a file was creat\n", signo );
set_folder_signal();
}
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//ÒªÓÃfcntl( fd, F_SETSIG, SIGRTMIN + 1 )¾ÍÒªÉèÖÃÕâ¸öºê
#define _GNU_SOURCE 1
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <