posix_memalign.3: Some functions set errno

True of bionic, glibc, and musl. (I didn't check elsewhere.)

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

diff --git a/man3/posix_memalign.3 b/man3/posix_memalign.3
index b4e3556629c2db17ee55592cc21d273e1c13d545..84b24303e185693ad2f8207c64f5d73f10985f2c 100644 (file)
--- a/man3/posix_memalign.3
+++ b/man3/posix_memalign.3
@@ -144,7 +144,9 @@ For all of these functions, the memory is not zeroed.
 .BR valloc (),
 and
 .BR pvalloc ()
-return a pointer to the allocated memory, or NULL if the request fails.
+return a pointer to the allocated memory on success.
+On error, NULL is returned, and \fIerrno\fP is set
+to indicate the cause of the error.
 .PP
 .BR posix_memalign ()
 returns zero on success, or one of the error values listed in the