MSYNC(2) BSD Programmer's Manual MSYNC(2)
m
\bms
\bsy
\byn
\bnc
\bc - synchronize a mapped region
S
\bSY
\bYN
\bNO
\bOP
\bPS
\bSI
\bIS
\bS
m
\bms
\bsy
\byn
\bnc
\bc(_
\bc_
\ba_
\bd_
\bd_
\br_
\b__
\bt _
\ba_
\bd_
\bd_
\br, _
\bi_
\bn_
\bt _
\bl_
\be_
\bn);
D
\bDE
\bES
\bSC
\bCR
\bRI
\bIP
\bPT
\bTI
\bIO
\bON
\bN
The m
\bms
\bsy
\byn
\bnc
\bc() system call writes any modified pages back to the filesystem
and updates the file modification time. If _
\bl_
\be_
\bn is 0, all modified pages
within the region containing _
\ba_
\bd_
\bd_
\br will be flushed; if _
\bl_
\be_
\bn is non-zero,
only the pages containing _
\ba_
\bd_
\bd_
\br and _
\bl_
\be_
\bn succeeding locations will be exam-
ined. Any required synchronization of memory caches will also take place
at this time. Filesystem operations on a file that is mapped for shared
modifications are unpredictable except after an m
\bms
\bsy
\byn
\bnc
\bc().
S
\bSE
\bEE
\bE A
\bAL
\bLS
\bSO
\bO
madvise(2), munmap(2), mprotect(2), mincore(2)
H
\bHI
\bIS
\bST
\bTO
\bOR
\bRY
\bY
The m
\bms
\bsy
\byn
\bnc
\bc() function first appeared in 4.4BSD.
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