EXIT(2) System Calls Manual EXIT(2)NAME
exit, _exit - terminate a process
SYNOPSIS
void _exit(int status)
DESCRIPTION
_exit terminates a process with the following consequences:
All of the descriptors open in the calling process are closed. This may entail delays, for example, waiting for output to drain; a
process in this state may not be killed, as it is already dying.
If the parent process of the calling process is executing a wait or is interested in the SIGCHLD signal (Minix-vmd), then it is
notified of the calling process's termination and the low-order eight bits of status are made available to it; see wait(2).
The parent process ID of all of the calling process's existing child processes are also set to 1. This means that the initializa-
tion process (see intro(2)) inherits each of these processes as well.
Most C programs call the library routine exit(3), which performs cleanup actions in the standard I/O library before calling _exit.
RETURN VALUE
This call never returns.
SEE ALSO fork(2), sigaction(2), wait(2), exit(3).
4th Berkeley Distribution May 22, 1986 EXIT(2)
Check Out this Related Man Page
EXIT(2) BSD System Calls Manual EXIT(2)NAME
_Exit, _exit -- terminate the calling process
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
void
_Exit(int status);
#include <unistd.h>
void
_exit(int status);
DESCRIPTION
The _Exit() and _exit() functions are equivalent. They each terminate a process with the following consequences:
o All of the descriptors open in the calling process are closed. This may entail delays, for example, waiting for output to drain; a
process in this state may not be killed, as it is already dying.
o If the parent process of the calling process has an outstanding wait(2) call or catches the SIGCHLD signal, it is notified of the calling
process's termination and the status is set as defined by wait(2).
o The parent process-ID of all of the calling process's existing child processes are set to 1; the initialization process (see the DEFINI-
TIONS section of intro(2)) inherits each of these processes.
o If the termination of the process causes any process group to become orphaned (usually because the parents of all members of the group
have now exited; see ``orphaned process group'' in intro(2)), and if any member of the orphaned group is stopped, the SIGHUP signal and
the SIGCONT signal are sent to all members of the newly-orphaned process group.
o If the process is a controlling process (see intro(2)), the SIGHUP signal is sent to the foreground process group of the controlling ter-
minal, and all current access to the controlling terminal is revoked.
Most C programs call the library routine exit(3), which flushes buffers, closes streams, unlinks temporary files, etc., before calling
_exit().
RETURN VALUES
_Exit() and _exit() can never return.
SEE ALSO fork(2), sigaction(2), wait(2), exit(3)STANDARDS
The _exit() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1''). The _Exit() function conforms to ISO/IEC 9899:1999 (``ISO C99'').
BSD April 23, 2002 BSD
how do differentiate a parent process and child process through the process id while it is executing through fork() command.
can i get the process id of both processes and can i do any operation on the process by using process id (6 Replies)
I want to catch SIGCHLD signal in parent process. I can't use wait() system call to catch SIGCHLD according to project requirment.
Operating system linux 3.1
can any one have a solution for this.
Thanking you,
ranjan (2 Replies)
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Hi,
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I need to know when we press ctrl+c to stop code execution where Parent is killed or child is... (1 Reply)
Hi,
I am calling a program that greps and returns 72536 bytes of data on STDOUT, say about 7000 lines of data on STDOUT.
I use pipe from the program am calling the above program. Naturally, I execute the above program (through execl() ) throught the child process and try to read the... (4 Replies)
Hi Guys,
Just wondering if I have a child process which is basically hanging and I can see that is on sleep or wait mode if I want to remove/terminate this process , the signal has to come from its parent I assume. The reason I'm asking this is because I'm facing a db2 hang situation and we... (3 Replies)
Hi,
I am getting fatal error or core dump by using this command "_exit(-1)". I need to terminate the program at a certain condition, but continous calling of this exit function, I am getting core dump. Is there any other command can be used to avoid the core dump ?? (3 Replies)
hi,
I want my program to fork a new process and then I want to kill the parent process. The parent program before dying will issue a SIGTERM to all its childs. Which eventually kills all Children.
I cant handle the SIGTERM at the child level.:(
What I was thinking of was the Parent... (3 Replies)
hello everybody!!
i want to post a question!
is there any way to get process status using C commands?
To be more specific, i want to know whether a process is running or is stop or killed.
thanks in advance! (3 Replies)
can any one please give me clear idea of wait process in UNIX system.
I am using AIX 5.3 and see loots of wait process. I have very basic concept of wait process. If CPU has nothing to do then a wait process is generated per CPU. But i want know the detail how is it forked.
Is wait a jombe... (2 Replies)
Hi,
How can I terminate process using vbscript. PLEASE NOTE, I need to terminate process that runs under windows 64-bit environment as native 64 (not using select * from win_32_Process) (3 Replies)
Source
a quick google search making clear that this isn't really new, and if we look at our bsd Forum we see that its the only operation systems forum with the last comment dated to June last year, whereas all the others have more recent comments.
One comment dated to 2014 is exactly what I... (10 Replies)