Pfork

Section: Oct. 1, 1991 (2)
Updated: MiNT Programmer's Manual
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NAME

Pfork - create a copy of the current process

SYNOPSIS

WORD Pfork();

DESCRIPTION

Pfork creates a copy of the current process. The child (the new process created) inherits a copy of the parent's address space, not the parent's original memory, and so changes to variables in the child do not affect the parent in any way. The new process begins execution with an apparent return from the Pfork call.

RETURNS

0 in the child

The new process id (a positive number), in the parent.

ENSMEM if there is not enough memory to create the new process.

BUGS

If the parent is in supervisor mode when this call is made, the child will be started in user mode anyway; thus, it is strongly recommended that this call be made only from user mode.

The current implementation of Pfork acts like Pvfork in that the parent is suspended until the child either exits or overlays itself with Pexec mode 200. Do not rely on this behavior, as it will be changed in future versions of MiNT.

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