signal stack SA_ONSTACK Post: 50353

8 More Discussions You Might Find Interesting

1. Programming

Signal Problem

I am using the signal function, and passing it a function named quit procedure...I get the following warning.... passing arg2 of signal from incompatible pointer type... void quit_procedure(void); //this is the way i define my prototype... signal(SIGINT, quit_procedure); Please guide...

2. Programming

what is stack winding and stack unwinding

helo can u tell me what do you mean by stack winding and stack unwinding Regards, Amit

3. Programming

problem with signal()

#include<signal.h> void suicide(); main() { printf("use CTRL \\ for exiting \n"); //signal(SIGINT,SIG_DFL); signal(SIGQUIT,suicide); for (;;); } void suicide() { printf("hello here you r in the suicide code "); } i was just starting with signals .. and tried this ,, but in the...

4. Shell Programming and Scripting

Killed by signal 15.

Hi all I have Master script, Main script ,and 4 Child script. Master.sh #!/bin/bash /export/home/user/Main.shMain.sh #!/bin/bash /export/home/user/Child1.sh & /export/home/user/Child2.sh & /export/home/user/Child3.sh & /export/home/user/Child4.sh &I run only Master.sh script...

5. UNIX for Advanced & Expert Users

need more user signal

Hi In my program I have already used both SIGUSR1 SIGUSR2 user signals. I need another one. How can I do that? Thank you Naama

6. UNIX for Dummies Questions & Answers

Trying to block signal

I have this code that doesnt do what it is suppose to do. It should block signal that I send while process is running. I press control+z while this process is running and it should be blocked but it isnt. When i press control+z it gives me this.... + Stopped When I change SIGTSP into SIGINT then...

7. Programming

queue a signal

A program have to receive signals and work agreed with it, but the process have to receive more than one signal when it is attending other. Those have to be queued to be attended later recived. how can i do that? thanks.

8. UNIX for Dummies Questions & Answers

Kernel Stack vs User Mode Stack

Hi, I am new to the linux kernel development area. I want to know what is the difference between kernel mode stack and user mode stack? Does each process has a user mode stack and a kernel mode stack?? Or Each process has a user mode stack and there is only one kernel mode stack that is shared by...

LEARN ABOUT ULTRIX

sigstack

sigstack(2)							System Calls Manual						       sigstack(2)

Name
       sigstack - set or get signal stack context

Syntax
       #include <signal.h>

       struct sigstack {
       caddr_t	 ss_sp;
       int  ss_onstack;
       };

       sigstack(ss, oss)
       struct sigstack *ss, *oss;

Description
       The  system  call  allows users to define an alternate stack on which signals are to be processed.  If ss is nonzero, it specifies a signal
       stack on which to deliver signals and tells the system if the process is currently executing on that stack.  When a signal's  action  indi-
       cates  its handler should execute on the signal stack (specified with a call), the system checks to see if the process is currently execut-
       ing on that stack.  If the process is not currently executing on the signal stack, the system arranges a switch to the signal stack for the
       duration of the signal handler's execution.  If oss is nonzero, the current signal stack state is returned.

       Signal stacks are not grown'automatically, as is done for the normal stack.  If the stack overflows, unpredictable results may occur.

Return Values
       Upon successful completion, a value of zero (0) is returned.  Otherwise, a value of -1 is returned and errno is set to indicate the error.

Diagnostics
       The system call fails and the signal stack context remains unchanged, if one of the following occurs.

       [EFAULT]       Either ss or oss points to memory that is not a valid part of the process address space.

See Also
       sigvec(2), setjmp(3)

																       sigstack(2)