diff options
| -rw-r--r-- | man2/fsync.2 | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/man2/fsync.2 b/man2/fsync.2 index 1043e6a1ba..036af0a9ef 100644 --- a/man2/fsync.2 +++ b/man2/fsync.2 @@ -155,16 +155,10 @@ to a value greater than 0. .\" POSIX.1-2001: It shall be defined to -1 or 0 or 200112L. .\" -1: unavailable, 0: ask using sysconf(). .\" glibc defines them to 1. -.PP -On some UNIX systems (but not Linux), -.I fd -must be a -.I writable -file descriptor. .SH STANDARDS POSIX.1-2008. .SH HISTORY -POSIX.1-2001, 4.3BSD. +POSIX.1-2001, 4.2BSD. .PP In Linux 2.2 and earlier, .BR fdatasync () @@ -181,6 +175,13 @@ In these cases disk caches need to be disabled using or .BR sdparm (8) to guarantee safe operation. +.PP +Under AT&T UNIX System V Release 4 +.I fd +needs to be opened for writing. +This is by itself incompatible with the original BSD interface +and forbidden by POSIX, +but nevertheless survives in HP-UX and AIX. .SH SEE ALSO .BR sync (1), .BR bdflush (2), |