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bug#19995: doc: Adds a bug section to sync.1 page to draw attention to u
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From: |
saulery |
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Subject: |
bug#19995: doc: Adds a bug section to sync.1 page to draw attention to unexpected behavior allowed by POSIX. |
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Date: |
Wed, 4 Mar 2015 01:06:01 +0100 |
From: Stéphane Aulery <address@hidden>
Almost identical copy of sync.2.
Debian bug #507085 reported by address@hidden
Signed-off-by: Stéphane Aulery <address@hidden>
---
man/sync.x | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/man/sync.x b/man/sync.x
index 79fee22..5b85bba 100644
--- a/man/sync.x
+++ b/man/sync.x
@@ -2,5 +2,10 @@
sync \- Synchronize cached writes to persistent storage
[DESCRIPTION]
.\" Add any additional description here
+[BUGS]
+According to the standard specification (e.g., POSIX.1-2001), sync()
+syscall schedules the writes, but may return before the actual writing is
+done. However, since version 1.3.20 Linux does actually wait. (This still
+does not guarantee data integrity: modern disks have large caches.)
[SEE ALSO]
fdatasync(2), fsync(2), sync(2), syncfs(2)
--
2.1.4