_exit() terminate a process	Function
	SYNOPSIS DESCRIPTION PARAMETERS RETURN VALUES CONFORMANCE MULTITHREAD SAFETY LEVEL PORTING ISSUES AVAILABILITY SEE ALSO

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SYNOPSIS

#include <unistd.h>

void _exit(int status);

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DESCRIPTION

The _exit() function terminates a process. If a process terminates for any reason, this function performs the following actions.

• _exit() closes any open file descriptors or handles.
• If the parent process of the calling process is executing a wait() or waitpid(), _exit() notifies the parent that the calling process is to be terminated and the low-order 8 bits of status are made available to it.
• If the parent process of the calling process is not executing a wait() or waitpid() function, _exit() saves the exit status code for return to the parent process whenever the parent process executes an appropriate subsequent wait() or waitpid().
• Terminating a process does not directly terminate its children. Sending a SIGHUP signal indirectly terminates children in some circumstances. _exit() assigns a new parent process ID (corresponding to an implementation-defined system process) to the children of a terminated process.
• A SIGCHLD is sent to the calling process' parent process.

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PARAMETERS

status 

Represents the termination status.

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RETURN VALUES

Never returns.

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CONFORMANCE

POSIX.1 (1996).

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MULTITHREAD SAFETY LEVEL

Async-signal-safe.

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PORTING ISSUES

None.

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AVAILABILITY

PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition

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SEE ALSO

Functions:

close(), sigaction(), wait()

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PTC MKS Toolkit 10.4 Documentation Build 39.