j*******e
发帖数: 674 | 1 I install a signal handler for a process.
The handler will catch all the signals except 9 and 23, and do nothing but
"print", and so on.
I found out that that: When the process receive the same signal for a second
time, the handler will not function anymore. And default action for that
signal will take effect.
I can't find any book mention such problem.
Is this a bug in my program, or it is the way that signal works? | m*****e
发帖数: 4193 | 2
This is how signal works on some Unix platform. You need to catch the signal
again in your signal handler.
【在 j*******e 的大作中提到】
: I install a signal handler for a process.
: The handler will catch all the signals except 9 and 23, and do nothing but
: "print", and so on.
: I found out that that: When the process receive the same signal for a second
: time, the handler will not function anymore. And default action for that
: signal will take effect.
: I can't find any book mention such problem.
: Is this a bug in my program, or it is the way that signal works?
| o***z
发帖数: 133 | 3 If you set SA_RESETHAND and the signal is caught,
the disposition of the signal is automatically reset to SIG_DFL
【在 j*******e 的大作中提到】
: I install a signal handler for a process.
: The handler will catch all the signals except 9 and 23, and do nothing but
: "print", and so on.
: I found out that that: When the process receive the same signal for a second
: time, the handler will not function anymore. And default action for that
: signal will take effect.
: I can't find any book mention such problem.
: Is this a bug in my program, or it is the way that signal works?
| p******f
发帖数: 162 | 4
If you are using signal(2), change to sigaction(2).
【在 j*******e 的大作中提到】
: I install a signal handler for a process.
: The handler will catch all the signals except 9 and 23, and do nothing but
: "print", and so on.
: I found out that that: When the process receive the same signal for a second
: time, the handler will not function anymore. And default action for that
: signal will take effect.
: I can't find any book mention such problem.
: Is this a bug in my program, or it is the way that signal works?
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