make not closing fds?

[Frank Kardel <kardel%netbsd.org@localhost>]

While building a release I saw in fstat that commands started from make 
had many (pipe) file descriptors allocated. Is make missing
setting FD_CLOEXEC/closing before fork on these ? While this is not 
really critical it opens up possibilities to clobber at least the output 
and gobble up
input data with misbehaved programs.

Frank

Example:
USER     CMD          PID   FD MOUNT       INUM MODE         SZ|DV R/W
root     rm          4126   wd /fs/raid1a 2666534 drwxr-xr-x     512 r
root     rm          4126    0 /tmp     85401585450532163 -rw-------    
1053 rw
root     rm          4126    1 /        11534468 crw-rw-rw-    null w
root     rm          4126    2* pipe 0xfffffe8680442708 -> 
0xfffffe87ded81040 w
root     rm          4126    3* pipe 0xfffffe8681282468 -> 
0xfffffe87acd3f2f8 w
root     rm          4126    4* pipe 0xfffffe874dfe4590 -> 
0xfffffe8749cb25b0 w
root     rm          4126    5 /fs/raid1a 2666537 -rw-r--r--   25192 w
root     rm          4126    6* pipe 0xfffffe8680442708 -> 
0xfffffe87ded81040 w
root     rm          4126    7* pipe 0xfffffe818d2b9290 -> 
0xfffffe8781eb1598 w
...more up to fs 40

root     cat        25766   wd /fs/raid1a 1985407 drwxr-xr-x     512 r
root     cat        25766    0 /tmp     85401585450180222 -rw-------     
750 rw
root     cat        25766    1* pipe 0xfffffe867fee2460 -> 
0xfffffe87e59a0538 w
root     cat        25766    2* pipe 0xfffffe867fee2460 -> 
0xfffffe87e59a0538 w
root     cat        25766    3* pipe 0xfffffe8681282468 -> 
0xfffffe87acd3f2f8 w
root     cat        25766    4* pipe 0xfffffe874dfe4590 -> 
0xfffffe8749cb25b0 w
root     cat        25766    5* pipe 0xfffffe87acd3f2f8 <- 
0xfffffe8681282468 rn
root     cat        25766    6* pipe 0xfffffe86cdd9c840 -> 
0xfffffe879aeed430 w
...more up to fd 30