struct sigaction结构体 structsigaction{void(*sa_handler)(int);// 信号处理函数指针void(*sa_sigaction)(int,siginfo_t*,void*);// 信号处理函数指针(扩展)sigset_tsa_mask;// 在处理该信号时要阻塞的信号集intsa_flags;// 修改信号行为的选项void(*sa_re
}intmain(void) {charbuf[512];intn;structsigaction sa_usr; sa_usr.sa_flags=0; sa_usr.sa_handler= sig_usr;//信号处理函数sigaction(SIGUSR1,&sa_usr, NULL); sigaction(SIGUSR2,&sa_usr, NULL); printf("My PID is %d\n", getpid());while(1) {if((n = read(STDIN_FILENO, buf,511))...
sigaction() returns 0 on success and -1 on error. sigaction结构体如下: struct sigaction { void (*sa_handler)(int); void (*sa_sigaction)(int, siginfo_t *, void *); sigset_t sa_mask; int sa_flags; void (*sa_restorer)(void); }; sa_restorer已经废弃不用了; sa_handler就是执行的动...
对于内核头文件而言,struct sigaction 结构体定义在kernel/include/asm/signal.h,此头文件又被kernel/include/linux/signal.h包含。 对于用户空间的头文件而言,struct sigaction定义在 /usr/include/bits/sigaction.h,此头文件又被/usr/include/signal.h包含,所以应用程序中如果用到此 结构,只要#include <signal.h>...
struct sigaction的定义如下:在linux2.6.39/include/asm-generic/signal.h中实现 [cpp]view plaincopyprint? struct sigaction { void(*sa_handler)(int); void(*sa_sigaction)(int,siginfo_t *,void *); sigset_tsa_mask; intsa_flags; } siginfo_t在linux2.6.39/include/asm-generic/siginfo.h中实现: ...
structsigaction sa; sigset_t new_mask,old_mask,wait_mask; // 设置 SIGINT 的处理程序为 handle_sigint sa.sa_handler=handle_sigint; sigemptyset(&sa.sa_mask); sa.sa_flags=0; if(sigaction(SIGINT,&sa,NULL)==-1){ perror("sigaction"); ...
struct sigaction的定义如下:在linux2.6.39/include/asm-generic/signal.h中实现 struct sigaction { void(*sa_handler)(int); void(*sa_sigaction)(int,siginfo_t *,void *); sigset_tsa_mask; intsa_flags; } siginfo_t在linux2.6.39/include/asm-generic/siginfo.h中实现: sa_flags的取值如下...
int sigaction(int signum, const struct sigaction *act,struct sigaction *oldact); 参数: signum 信号编号 act 默认需要初始化结构体 oldact 旧的结构体(一步不使用可以传NULL) 返回值: 成功 0 失败 -1 #include <unistd.h> #include <sys/wait.h> #include <stdio.h> #include <stdlib.h> #include...
使用sigaction功能注册SIGINT信号处理程序例程 即使UNIX 系统中signal函数调用的现代实现对于简单的用例也可以可靠地工作,但还是建议使用sigaction函数来注册信号处理程序。与signal调用相比,它提供了更多的选择,但它也提供了对于信号的任何严重使用情况都必需的核心功能。sigaction带有特殊的struct sigaction参数,以指定处理程序函...
sigaction(sig, act, oact) means “set the disposition for sig to act, and store the old disposition in oact”. Its return value is 0 or -1, indicating whether the system call errored.Those struct sigactions are “dispositions”, meaning they express what to do when the given signal is ...