有没有办法找出红帽企业
Linux 5(SIGTERM等)发送的信号的来源？
我经常在一个应用程序中捕获一个TERM,我不知道它来自哪里.
我经常在一个应用程序中捕获一个TERM,我不知道它来自哪里.
解决方法@H_301_5@
sigaction(2)的手册页建议信号发送器的PID在传递给信号处理程序的siginfo_t结构中可用.这显然要求您使用sigaction().
从手册页：
sigaction结构定义为：
struct sigaction {
void (*sa_handler)(int);
void (*sa_sigaction)(int,siginfo_t *,void *);
sigset_t sa_mask;
int sa_flags;
void (*sa_restorer)(void);
};
siginfo_t结构如下所示：
siginfo_t {
int si_signo; /* Signal number */
int si_errno; /* An errno value */
int si_code; /* Signal code */
int si_trapno; /* Trap number that caused
hardware-generated signal
(unused on most architectures) */
pid_t si_pid; /* Sending process ID */
uid_t si_uid; /* Real user ID of sending process */
int si_status; /* Exit value or signal */
clock_t si_utime; /* User time consumed */
clock_t si_stime; /* System time consumed */
sigval_t si_value; /* Signal value */
int si_int; /* POSIX.1b signal */
void *si_ptr; /* POSIX.1b signal */
int si_overrun; /* Timer overrun count; POSIX.1b timers */
int si_timerid; /* Timer ID; POSIX.1b timers */
void *si_addr; /* Memory location which caused fault */
int si_band; /* Band event */
int si_fd; /* File descriptor */
}
从手册页：
sigaction结构定义为：
struct sigaction {
void (*sa_handler)(int);
void (*sa_sigaction)(int,siginfo_t *,void *);
sigset_t sa_mask;
int sa_flags;
void (*sa_restorer)(void);
};
siginfo_t结构如下所示：
siginfo_t {
int si_signo; /* Signal number */
int si_errno; /* An errno value */
int si_code; /* Signal code */
int si_trapno; /* Trap number that caused
hardware-generated signal
(unused on most architectures) */
pid_t si_pid; /* Sending process ID */
uid_t si_uid; /* Real user ID of sending process */
int si_status; /* Exit value or signal */
clock_t si_utime; /* User time consumed */
clock_t si_stime; /* System time consumed */
sigval_t si_value; /* Signal value */
int si_int; /* POSIX.1b signal */
void *si_ptr; /* POSIX.1b signal */
int si_overrun; /* Timer overrun count; POSIX.1b timers */
int si_timerid; /* Timer ID; POSIX.1b timers */
void *si_addr; /* Memory location which caused fault */
int si_band; /* Band event */
int si_fd; /* File descriptor */
}
