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Digital UNIX Diffs - vfork(5)			 Digital UNIX Diffs - vfork(5)

NAME
       vfork -	Creates a new process

SYNOPSIS
       #include <sys/types.h> pid_t vfork ( void );

DIFFERENCES
       vms-process(5): OpenVMS Process Model Differences

       vfork  used  with  an exec(2) function on OpenVMS simulates vfork(2) or
       fork(2) used with an exec(2) function on Digital	 UNIX.	 The  pair  of
       functions  create  and  initialize a new process.  However, there are 2
       major differences.  First vfork does not create a new process on	 Open‐
       VMS  as	it  does  on UNIX.  It sets up the environment so that an exec
       function can create the new process.  Second, whereas the process  cre‐
       ated  by the UNIX fork is identical to its parent, on OpenVMS the newly
       created process only shares some of its parent characteristics.	 Char‐
       acteristics  passed  to	the  child on OpenVMS include: parent's umask,
       open filenames and positions, SIG_IGN  signal  actions  (not  SIG_DFL),
       environment  variables,	and  argument  vectors.	 The list of inherited
       attributes on UNIX are listed in fork(2).

RELATED INFORMATION
       Functions:  vfork(2), exec(2)

CATEGORY INDEX
	vms-process(5)

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						 Digital UNIX Diffs - vfork(5)

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