<s>
process.h	B-Language
is	O
a	O
C	B-Language
header	I-Language
file	I-Language
which	O
contains	O
function	O
declarations	O
and	O
macros	O
used	O
in	O
working	O
with	O
threads	O
and	O
processes	O
.	O
</s>
<s>
Most	O
C	O
compilers	O
that	O
target	O
DOS	B-Device
,	O
Windows	B-Application
3.1x	I-Application
,	O
Win32	B-Library
,	O
OS/2	B-Application
,	O
Novell	O
NetWare	O
or	O
DOS	B-Device
extenders	I-Device
supply	O
this	O
header	O
and	O
the	O
library	O
functions	O
in	O
their	O
C	O
library	O
.	O
</s>
<s>
Neither	O
the	O
header	B-Language
file	I-Language
nor	O
most	O
of	O
the	O
functions	O
are	O
defined	O
by	O
either	O
the	O
ANSI/ISO	O
C	O
standard	O
or	O
by	O
POSIX	O
.	O
</s>
<s>
The	O
Lattice	B-Device
C	I-Device
compiler	O
version	O
3.30	O
(	O
Aug-24-1988	O
)	O
did	O
not	O
have	O
such	O
a	O
header	B-Language
file	I-Language
,	O
but	O
offered	O
similar	O
functions	O
.	O
</s>
<s>
Borland	O
provided	O
the	O
header	O
in	O
their	O
Turbo	B-Application
C	I-Application
compiler	O
version	O
2.01	O
.	O
</s>
<s>
NameDescriptionNotes	O
execl	B-Operating_System
,	O
execle	B-Operating_System
,	O
execlp	O
,	O
execlpeload	O
and	O
execute	B-General_Concept
a	O
new	O
child	O
process	O
by	O
placing	O
it	O
in	O
memory	O
previously	O
occupied	O
by	O
the	O
parent	O
process	O
.	O
</s>
<s>
Parameters	O
are	O
passed	O
individually.DOS	O
,	O
Win	O
,	O
OS/2	B-Application
,	O
POSIX	O
execv	B-Operating_System
,	O
execve	B-Operating_System
,	O
execvp	O
,	O
execvpeload	O
and	O
execute	B-General_Concept
a	O
new	O
child	O
process	O
by	O
placing	O
it	O
in	O
memory	O
previously	O
occupied	O
by	O
the	O
parent	O
process	O
.	O
</s>
<s>
Parameters	O
are	O
passed	O
as	O
an	O
array	O
of	O
pointers.DOS	O
,	O
Win	O
,	O
OS/2	B-Application
,	O
POSIX	O
spawnl	B-Language
,	O
spawnle	B-Language
,	O
spawnlp	O
,	O
spawnlpeload	O
and	O
execute	B-General_Concept
a	O
new	O
child	O
process	O
.	O
</s>
<s>
Parameters	O
are	O
passed	O
individually.DOS	O
,	O
Win	O
,	O
OS/2	B-Application
spawnv	O
,	O
spawnve	O
,	O
spawnvp	O
,	O
spawnvpeload	O
and	O
execute	B-General_Concept
a	O
new	O
child	O
process	O
.	O
</s>
<s>
NameDescriptionNotesOS	O
_P_WAITSuspends	O
parent	O
process	O
until	O
the	O
child	O
process	O
has	O
finished	O
executing.synchronous	O
spawn.MS-DOS	O
,	O
Win32	B-Library
,	O
OS/2	B-Application
_P_NOWAIT	O
,	O
_P_NOWAITOContinues	O
to	O
execute	B-General_Concept
calling	O
process	O
concurrently	O
with	O
new	O
process.asynchronous	O
spawn.Win32	O
,	O
OS/2	B-Application
_P_OVERLAYOverlays	O
parent	O
process	O
with	O
child	O
,	O
which	O
destroys	O
the	O
parent.has	O
the	O
same	O
effect	O
as	O
the	O
exec*	O
functions.MS-DOS	O
,	O
Win32	B-Library
,	O
OS/2	B-Application
_P_DETACHThe	O
child	O
is	O
run	O
in	O
background	O
without	O
access	O
to	O
the	O
console	O
or	O
keyboard.Calls	O
to	O
_cwait	O
upon	O
the	O
new	O
process	O
will	O
fail	O
.	O
</s>
<s>
Given	O
the	O
fact	O
there	O
is	O
no	O
standard	O
on	O
which	O
to	O
base	O
the	O
implementation	O
,	O
the	O
functions	O
declared	O
by	O
process.h	B-Language
differ	O
,	O
depending	O
on	O
the	O
compiler	O
in	O
use	O
.	O
</s>
<s>
Below	O
is	O
a	O
list	O
of	O
compilers	O
which	O
provide	O
process.h.	O
</s>
<s>
Another	O
aspect	O
that	O
might	O
vary	O
is	O
the	O
combined	O
length	O
of	O
exec*	O
and	O
spawn*	O
parameters	O
.	O
</s>
