Detect create or delete files report: Signal processing mechanism

#include <stdio.h> #define  _GNU_SOURC#include<fcntl.h> #include <stdlib.h> #include < signal.h> #include <unistd.h>static void handler_d (int sig,siginfo_t *s,void*  Data) {int even_fd,even_pid;even_fd=s->si_fd;even_pid=s->si_pid;printf ("process:%d,has deleted  something from fd:%d\n ", EVEN_PID,EVEN_FD);} Static void handler_m (int sig,siginfo_t *s,void* data) {Int even_fd,even_pid;even _fd=s->si_fd;even_pid=s->si_pid;printf ("process:%d,has motified something from fd:%d \ n ", even_pid,even_fd);} Int main () {struct sigaction act_d,act_m;int fd1,fd2;pid_t pid;pid=fork (); if (pid<0) {printf ("error\n"); exit (1);} Else if (pid==0) {//childfd1=open ("/home/xiaozhi", o_rdonly), if (fd1==-1) {printf ("Open /home/xiaozhi  fail\n ");} Fd2=open ("/home/rz", o_rdonly), if (fd2==-1) {printf ("open /home/rz fail\n");} Act_m.sa_sigaction=handler_m;sIgemptyset (&act_m.sa_mask); act_m.sa_flags=sa_siginfo;sigaction (sigrtmin+2,&act_m,null); Fcntl (fd1,F_ setsig,sigrtmin+2); Fcntl (fd1,f_notify,dn_modify| Dn_multishot); Fcntl (fd2,f_setsig,sigrtmin+2); Fcntl (fd2,f_notify,dn_modify| Dn_multishot); while (1) {pause ();}} Else{//fatherfd1=open ("/home/xiaozhi", o_rdonly), if (fd1==-1) {printf ("open /home/xiaozhi fail\n");} Fd2=open ("/home/rz", o_rdonly), if (fd2==-1)     {printf ("open /home/rz fail\n");} Act_d.sa_sigaction=handler_d;sigemptyset (&act_d.sa_mask); Act_d.sa_flags=sa_siginfo;sigaction (SIGRTMIN+1, &act_d,null); Fcntl (fd1,f_setsig,sigrtmin+1); Fcntl (fd1,f_notify,dn_modify| Dn_multishot); Fcntl (fd2,f_setsig,sigrtmin+1); Fcntl (fd2,f_notify,dn_modify| Dn_multishot); while (1) {pause ();}}}

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Detect create or delete files report: Signal processing mechanism