I am having trouble with folowing
Can anyone see my comment in the code and tell me if I am right. Last sigprocmask i read in documentation but I didnt really understand it.
Any help would be great
(posted this in the scripting forum as well, but figured it should go here) So, what's going on is this:
For our program, we had to create our own shell, and if the user pressed ctrl-c just at the cmdline, then this signal would be ignored, but if there is a foreground process running, let's... (0 Replies)
How can use signals in a C program If i want a child program to signal it's parent program that it(child) program has completed the task that it was assigned.:confused: (2 Replies)
can any one give me an example of a concurrency program in threads and signals, i.e how to deliver messages between threads using signals. thanks (0 Replies)
can any one give me an example of a concurrency program in threads and signals, i.e how to deliver messages between threads using signals. thanks (2 Replies)
Hi,
In our program, we are using SIGTERM and i tired to put break point in this function. But my debuger is unable to brake at that point.
I am working on Mac X and using XCode.
Thanks (0 Replies)
I have following problem with this code..
First time trough the main loop.....
perror gives ....blocked signal:success(all other times gives illlegal seek)
Should every time trought the main loop be success??
And the perror otside of main loop...didn't change mask:success
That line of code... (2 Replies)
I know how to add signal to a set. But what if I want to add 2 or 3 signals to the set.
I know I can use sigaddset (&set,SIGBUS)....but what if I want to add SIGBUS and SIGALRM at once. Do i have to do it like this..
sigaddset (&set,SIGBUS);
sigaddset (&set,SIGALRM);
Is there another way to... (0 Replies)
how can do this programs in c++
Program description:
Infinite loop in a program starts working with 2 seconds the screen (console) "I 'm trying" to write, but it automatically after 10 seconds, the screen "Close" will terminate the execution of typing.
c++ code (3 Replies)
Hi All,
The problem statement is as below:
Problem: A process (exe) is getting executed in background. The output of this process is getting logged in a file. After successfully running for some time the process gets terminated. In the log file following is present:
^M[7m Interrupt ^M[27m... (8 Replies)
Discussion started by: Praty.27
8 Replies
LEARN ABOUT OSF1
sigismember
sigemptyset(3) Library Functions Manual sigemptyset(3)NAME
sigemptyset, sigfillset, sigaddset, sigdelset, sigismember - Creates and manipulates signal masks
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <signal.h>
int sigemptyset (
sigset_t *set);
int sigfillset (
sigset_t *set);
int sigaddset (
sigset_t *set,
int sig_number );
int sigdelset (
sigset_t *set,
int sig_number );
int sigismember (
sigset_t *set,
int sig_number );
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
sigemptyset(), sigfillset(), sigaddset(), sigdelset() sigismember(): XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies the signal set. Specifies the individual signal.
DESCRIPTION
The sigemptyset(), sigfillset(), sigaddset(), sigdelset(), and sigismember() functions manipulate sets of signals. These functions operate
on data objects that can be addressed by the application, not on any set of signals known to the system, such as the set blocked from
delivery to a process or the set pending for a process.
The sigemptyset() function initializes the signal set pointed to by the set parameter such that all signals are excluded. The sigfillset()
function initializes the signal set pointed to by the set parameter such that all signals are included. A call to either the sigfillset()
or sigemptyset() function must be made at least once for each object of the type sigset_t prior to any other use of that object.
The sigaddset() and sigdelset() functions respectively add and delete the individual signal specified by the sig_number parameter from the
signal set specified by the set parameter. The sigismember() function tests whether the sig_number parameter is a member of the signal set
pointed to by the set parameter.
EXAMPLES
To generate and use a signal mask that blocks only the SIGINT signal from delivery, enter: #include <signal.h> int return_value; sigset_t
newset;
. . . sigemptyset(&newset); sigaddset(&newset, SIGINT); return_value = sigprocmask (SIG_SETMASK, &newset, NULL);
RETURN VALUES
Upon successful completion, the sigismember() function returns a value of 1 if the specified signal is a member of the specified set, or a
value of 0 (zero) if it is not. Upon successful completion, the other functions return a value of 0. For all the preceding functions, if
an error is detected, a value of -1 is returned and errno is set to indicate the error.
ERRORS
The sigfillset(), sigdelset(), sigismember(), and sigaddset() functions set errno to the specified values for the following conditions: The
value of the sig_number parameter is not a valid signal number.
RELATED INFORMATION
Functions: sigaction(2), sigprocmask(2), sigsuspend(2), sigvec(2)
Files: signal(4)
Standards: standards(5) delim off
sigemptyset(3)