brk(2): sbrk(0) returns end address, not the base

sbrk(0) returns the current end address of the BSS segment,
not the base. This might have been confused with the behaviour
of segbrk(), which when given a zero address returns the base.

diff --git a/sys/man/2/brk b/sys/man/2/brk
index f916a6877ef8a74eed3a3b2b7d9ea1c7abe99c65..3dad1a7d25ef99cc8a39d569f2ee13811750ef64 100644 (file)
--- a/sys/man/2/brk
+++ b/sys/man/2/brk
@@ -43,7 +43,7 @@ data areas need to use
 .IR brk .
 A call to
 .I sbrk
-with a zero argument returns the lowest address
+with a zero argument returns the end address
 in the dynamic segment.
 .SH SOURCE
 .B /sys/src/libc/9sys/sbrk.c