Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Runaway SIGALRM signal handler
Top Forums Programming Runaway SIGALRM signal handler Post 302184188 by Perderabo on Thursday 10th of April 2008 11:12:16 PM
Old 04-11-2008
You are doing something extremely non-standard and you aren't bothering to test the return codes. Solaris does not support O_ASYNC. Here is the Solaris 9 fcntl man page. I don't see any O_ASYNC flag mentioned. You actually got this to compile on Solaris??? I got to try that tomorrow.... I would expect it to run on FreeBSD. I'm not sure about Linux.... I'm don't have time right now to look up the man pages. Anyway this BSD async stuff is pretty much BSD only and not part of Posix.

Please test those return codes. If not all the time, at least break down and test them when you don't understand the behavior of the system calls.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

shell script signal handler

AIX 4.3.3 I am trying to write a signal handler into a ksh shell script. I would like to capture the SIGTERM, SIGINT, and the SIGTSTP signals, print out a message to the terminal, and continue executing the script. I have found a way to block the signals: #! /bin/ksh SIGTERM=15 SIGINT=2... (2 Replies)
Discussion started by: jalburger
2 Replies

2. Programming

signal handler for SIGCHLD

Hi, I have an c++ application which uses the function fork and execvp(). The parent does not wait until the child ends. The parents just creates children and let them do their stuff. You can see the parent program as a batch-manager. I have added a SIGCHLD handler to the program: void... (3 Replies)
Discussion started by: jens
3 Replies

3. Programming

signal handler problems

Hey guys, I am trying to write a little shell, and was writing a signal handler to handle SIGINT (I am using 'stty intr ^C' and using ctrl-C to give SIGINT). I wrote this signal handler: void handle_sigint() { write(2,"handling sigint\n",16); write(1,"\nshell% ",8); } ... (4 Replies)
Discussion started by: blowtorch
4 Replies

4. Programming

Usage of exit() inside a signal handler

Is it ok to use exit() inside a signal handler? I catch SIGUSR1 in a signal handler and I try to close a file and then exit. The result is inconsistent. Sometimes the process exit and sometimes it returns to the original state before the signal handler was invoked. Perhaps exit is not legal in... (8 Replies)
Discussion started by: Tuvia
8 Replies

5. Programming

Problem with signal handler and interrupted system call

Hi, I have a daq program that runs in an infinite loop until it receives SIGINT. A handler catches the signal and sets a flag to stop the while loop. After the loop some things have to be cleaned up. The problem is that I want my main while loop to wait until the next full second begins, to... (2 Replies)
Discussion started by: soeckel
2 Replies

6. Shell Programming and Scripting

Perl - Problems with Signal Handler

I have a problem with signal handlers not working. I have a long 1000 line code and somehow this code for signal handling is not working: $SIG{INT} = \&interrupt; sub interrupt { print STDERR "Caught a control c!\n"; exit; # or just about anything else you'd want to do } Any... (2 Replies)
Discussion started by: som.nitk
2 Replies

7. Programming

Signal Handler Hangs

Hi, I have a problem with signal handler algorithm in linux. My code is hanging ( It is continuously looping inside the signal handler) . I am pasting my code here... Please provide me some help regarding this. I googled many places and wrote this code.. but doesnt seem to be working without... (6 Replies)
Discussion started by: sree_ec
6 Replies

8. Shell Programming and Scripting

Perl Signal Handler

I was working on some Perl code that does signal handling and I came across this one liner and wasn't sure what it was doing. local $SIG{__DIE__} = sub {$! = 2; die $_;}; I think the first part of the anonymous subroutine is setting $! to 2, but I am not sure what the second part is doing. ... (1 Reply)
Discussion started by: SFNYC
1 Replies

9. Programming

problem in doing coding of signal handler

i m unble to execute code of signal handler using a) Wait b) Waitpid (1 Reply)
Discussion started by: madhura
1 Replies

10. Programming

Serial port signal(IRQ) handler (using C)

Hello, I'm writing some serial(UART) handler but have stuck on few issues, maybe anyone can help to show me what I'm doing wrong. Basically I'm intending to write serial RX signal handler. Application receives defined packages of data over serial which contains header and payload. Handler... (3 Replies)
Discussion started by: Lauris_k
3 Replies

LEARN ABOUT NETBSD

atf-test-program

ATF-TEST-PROGRAM(1)					    BSD General Commands Manual 				       ATF-TEST-PROGRAM(1)

NAME

     atf-test-program -- common interface to ATF test programs

SYNOPSIS

     atf-test-program [-r resfile] [-s srcdir] [-v var1=value1 [.. -v varN=valueN]] test_case
     atf-test-program -l

DESCRIPTION

     Test programs written using the ATF libraries all share a common user interface, which is what this manual page describes.  NOTE: There is no
     binary known as atf-test-program; what is described in this manual page is the command-line interface exposed by the atf-c, atf-c++ and
     atf-sh bindings.

     In the first synopsis form, the test program will execute the provided test case and print its results to the standard output, unless other-
     wise stated by the -r flag.  Optionally, the test case name can be suffixed by ':cleanup', in which case the cleanup routine of the test case
     will be executed instead of the test case body; see atf-test-case(4).  Note that the test case is executed without isolation, so it can and
     probably will create and modify files in the current directory.  To execute test cases in a controller manner, refer to atf-run(1), which is
     the preferred way to run test cases.  You should only execute test cases by hand for debugging purposes.

     In the second synopsis form, the test program will list all available test cases alongside their meta-data properties in a format that is
     machine parseable.  This list is processed by atf-run(1) to know how to execute the test cases of a given test program.

     The following options are available:

     -l 	     Lists available test cases alongside a brief description for each of them.

     -r resfile      Specifies the file that will receive the test case result.  If not specified, the test case prints its results to stdout.	If
		     the result of a test case needs to be parsed by another program, you must use this option to redirect the result to a file
		     and then read the resulting file from the other program.  Note: do not try to process the stdout of the test case because
		     your program may break in the future.

     -s srcdir	     The path to the directory where the test program is located.  This is needed in all cases, except when the test program is
		     being executed from the current directory.  The test program will use this path to locate any helper data files or utilities.

     -v var=value    Sets the configuration variable var to the value value.

SEE ALSO

     atf-run(1), atf(7)

BSD
								 February 6, 2011							       BSD
All times are GMT -4. The time now is 08:37 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy