有哪些网站程序,wordpress 主题制作,做暧小视频xo网站,企业vi包含哪些内容与信号集操作相关的函数 #include signal.h
清空信号集 全都为0
int sigemptyset(sigset_t *set);填充信号集 全都为1
int sigfillset(sigset_t *set);添加某个信号到信号集
int sigaddset(sigset_t *set, int signum);从集合中删除某个信号
int sigdelset(sigset_t *s…与信号集操作相关的函数 #include signal.h
清空信号集 全都为0
int sigemptyset(sigset_t *set);填充信号集 全都为1
int sigfillset(sigset_t *set);添加某个信号到信号集
int sigaddset(sigset_t *set, int signum);从集合中删除某个信号
int sigdelset(sigset_t *set, int signum);判断信号是否在信号集中
int sigismember(const sigset_t *set, int signum);
以上函数的返回值 sigemptyset(), sigfillset(), sigaddset(), and sigdelset() return 0 onsuccess and -1 on error.sigismember() returns 1 if signum is a member of set, 0 if signum isnot a member, and -1 on error.用来设置或者是解除阻塞信号的函数
#include signal.h
int sigprocmask(int how, const sigset_t *set, sigset_t *oldset);参数介绍
howSIG_BLOCK 设置阻塞The set of blocked signals is the union of the current set andthe set argument.SIG_UNBLOCK 解除阻塞The signals in set are removed from the current set of blockedsignals. It is permissible to attempt to unblock a signal whichis not blocked.SIG_SETMASK 设置set为新的阻塞信号集The set of blocked signals is set to the argument set.set 传入的信号集
oldset 传出的信号集return
sigprocmask() returns 0 on success and -1 on error.sigpending函数 读取当前进程的未决信号集 man sigpending
#include signal.h
int sigpending(sigset_t *set);
set为传出参数
返回值成功0 失败-1设置errno代码案例 设置屏蔽信号集然后发送信号然后打印当前未决信号集
#include signal.h
#include stdio.h
#include unistd.hint main() {sigset_t pend, setShield;sigemptyset(setShield);sigaddset(setShield, SIGINT);sigaddset(setShield, SIGQUIT);sigprocmask(SIG_BLOCK, setShield, NULL);while (1) {sigpending(pend);int i1;for(; i32; i) {printf(%d, sigismember(pend, i));}printf(\n);sleep(1);}return 0;
}
// 0110000000000000000000000000000
