Rework the kernel environment subsystem. We now convert the static

environment needed at boot time to a dynamic subsystem when VM is
up.  The dynamic kernel environment is protected by an sx lock.

This adds some new functions to manipulate the kernel environment :
freeenv(), setenv(), unsetenv() and testenv().  freeenv() has to be
called after every getenv() when you have finished using the string.
testenv() only tests if an environment variable is present, and
doesn't require a freeenv() call. setenv() and unsetenv() are self
explanatory.

The kenv(2) syscall exports these new functionalities to userland,
mainly for kenv(1).

Reviewed by:	peter

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/kern/syscalls.c b/sys/kern/syscalls.c
index a7d4102..34a1382 100644
--- a/sys/kern/syscalls.c
+++ b/sys/kern/syscalls.c
@@ -397,4 +397,5 @@ char *syscallnames[] = {
 	"#387",			/* 387 = __mac_get_file */
 	"#388",			/* 388 = __mac_set_fd */
 	"#389",			/* 389 = __mac_set_file */
+	"kenv",			/* 390 = kenv */
 };