xnu-3248.60.10.tar.gz

[apple/xnu.git] / bsd / man / man2 / vfork.2

diff --git a/bsd/man/man2/vfork.2 b/bsd/man/man2/vfork.2
index c8b1d3bbddeaaaa5dc7295adf273b91566986c93..c512eae015a4a9e59235996080a74abe3039e87c 100644 (file)
--- a/bsd/man/man2/vfork.2
+++ b/bsd/man/man2/vfork.2
@@ -42,7 +42,9 @@
 .Sh SYNOPSIS
 .Fd #include <unistd.h>
 .Ft pid_t
 .Sh SYNOPSIS
 .Fd #include <unistd.h>
 .Ft pid_t

-.Fn vfork void
+.Fo vfork
+.Fa void
+.Fc

 .Sh DESCRIPTION
 .Fn Vfork
 can be used to create new processes without fully copying the address
 .Sh DESCRIPTION
 .Fn Vfork
 can be used to create new processes without fully copying the address


@@ -91,13 +93,30 @@ it is wrong to call
 .Xr exit
 since buffered data would then be flushed twice.)
 .Sh SEE ALSO
 .Xr exit
 since buffered data would then be flushed twice.)
 .Sh SEE ALSO

-.Xr fork 2 ,

 .Xr execve 2 ,
 .Xr execve 2 ,

+.Xr fork 2 ,

 .Xr sigaction 2 ,
 .Xr wait 2 
 .Xr sigaction 2 ,
 .Xr wait 2 

-.Sh DIAGNOSTICS
-Same as for
-.Xr fork .
+.Sh ERRORS
+The
+.Fn vfork
+system call will fail for any of the reasons described
+in the
+.Xr fork
+man page.
+In addition, it will fail if:
+.Bl -tag -width Er
+.\" ===========
+.It Bq Er EINVAL
+A system call other than
+.Xr _exit()
+or
+.Xr execve()
+(or libc functions that make no system calls other than those)
+is called following calling a
+.Fn vfork
+call.
+.El

 .Sh BUGS
 This system call will be eliminated when proper system sharing
 mechanisms are implemented. 
 .Sh BUGS
 This system call will be eliminated when proper system sharing
 mechanisms are implemented.