[musl] [PATCH] add strerror messages for cryptographic-key errno values

[Chris Webb <chris@arachsys.com>]

ENOKEY, EKEYEXPIRED, EKEYREVOKED and EKEYREJECTED messages are taken from
the comments in the Linux uapi errno.h, but also match glibc's strerror.

These errno values are now commonly returned by mount(2) and therefore
passed to strerror() by mount(8) when working with encrypted filesystems.
---
 src/errno/__strerror.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/errno/__strerror.h b/src/errno/__strerror.h
index 2d992da5..14925907 100644
--- a/src/errno/__strerror.h
+++ b/src/errno/__strerror.h
@@ -102,3 +102,7 @@ E(EDQUOT,       "Quota exceeded")
 E(ENOMEDIUM,    "No medium found")
 E(EMEDIUMTYPE,  "Wrong medium type")
 E(EMULTIHOP,    "Multihop attempted")
+E(ENOKEY,       "Required key not available")
+E(EKEYEXPIRED,  "Key has expired")
+E(EKEYREVOKED,  "Key has been revoked")
+E(EKEYREJECTED, "Key was rejected by service")