linux环境一个进程收到kill信号，能否知道是哪个进程发送的

[pengxn]

rt linux环境一个进程收到kill信号，能否知道是哪个进程发送的

[小笨和漂向北方]

from stackoverflow Two Linux-specific methods are SA_SIGINFO and signalfd(), which allows programs to receive very detailed information about signals sent, including the sender's PID. Call sigaction() and pass to it a struct sigaction which has the desired signal handler in sa_handler and the SA_SIGINFO flag in sa_flags set. With this flag, your signal handler will receive three arguments, one of which is a siginfo_t structure containing the sender's PID and UID. Call signalfd() and read signalfd_siginfo structures from it (usually in some kind of a select/poll loop). The contents will be similar to siginfo_t.

[蓝兔先生]

楼上的英文一发， 都不敢回答了。。。。