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Message-ID: <CAFDeuWNrOMC=qrTLXdRO01ZUrBCKttn7+TWHDqr9hkTWS0QiyA@mail.gmail.com>
Date: Mon, 26 Oct 2020 20:21:18 -0300
From: Érico Rolim <erico.erc@...il.com>
To: mtk.manpages@...il.com
Cc: linux-man@...r.kernel.org, musl@...ts.openwall.com, ericonr@...root.org
Subject: Re: [PATCH v3] posix_fallocate.3: add EOPNOTSUPP error code.

As can be seen in

https://git.musl-libc.org/cgit/musl/tree/src/fcntl/posix_fallocate.c?id=73cc775bee53300c7cf759f37580220b18ac13d3

musl libc returns the syscall's errors directly, which means it doesn't
perform the same emulation as glibc, and can return EOPNOTSUPP to an
application, which isnt't listed in ERRORS.
---

Made a small correction to the formatting for fd.

 man3/posix_fallocate.3 | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/man3/posix_fallocate.3 b/man3/posix_fallocate.3
index 3152dd54f..8ea37261a 100644
--- a/man3/posix_fallocate.3
+++ b/man3/posix_fallocate.3
@@ -98,6 +98,13 @@ There is not enough space left on the device
containing the file
 referred to by
 .IR fd .
 .TP
+.B EOPNOTSUPP
+The filesystem containing the file referred to by
+.I fd
+does not support this operation.
+This error code can be returned by libc's that don't perform the
+emulation shown in NOTES, such as musl libc.
+.TP
 .B ESPIPE
 .I fd
 refers to a pipe.
-- 
2.29.0

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