↑ 同僚のエントリを読んで 早速調べものをしていたのだが、8進数で書かれたフラグを理解するのがちょっと大変。 lsof あたりで人間が読みやすくするようにサポートしてないのかな? ... と調べたらあった!
lsof +f g オプション
lsof に +f g って付ける良い。以下は apache2 の lsof をとった内容
$ sudo lsof +f g -p 5087 | tail apache2 5087 www-data DEL REG 0,5 32893 /dev/zero apache2 5087 www-data 0r CHR LG 1,3 0t0 6 /dev/null apache2 5087 www-data 1w CHR W,LG 1,3 0t0 6 /dev/null apache2 5087 www-data 2w REG W,AP,LG 252,0 739 35389666 /var/log/apache2/error.log apache2 5087 www-data 3u IPv4 RW,ND,0x80000 67450 0t0 TCP *:http (LISTEN) apache2 5087 www-data 4r FIFO 0x80000 0,10 0t0 32892 pipe apache2 5087 www-data 5w FIFO W,0x80000 0,10 0t0 32892 pipe apache2 5087 www-data 6w REG W,AP,LG,0x80000 252,0 0 35389607 /var/log/apache2/other_vhosts_access.log apache2 5087 www-data 7w REG W,AP,LG,0x80000 252,0 0 35389605 /var/log/apache2/access.log apache2 5087 www-data 8u a_inode RW,0x80000 0,11 0 12000 [eventpoll]
フラグは略記されており、それぞれの読み方は man に書いてあります
FILE-FLAG when g or G has been specified to +f, this field contains the contents of the f_flag[s] member of the kernel file structure and the kernel's per-process open file flags (if available); `G'
causes them to be displayed in hexadecimal; `g', as short-hand names; two lists may be displayed with entries separated by commas, the lists separated by a semicolon (`;'); the first list
may contain short-hand names for f_flag[s] values from the following table:
AIO asynchronous I/O (e.g., FAIO)
AP append
ASYN asynchronous I/O (e.g., FASYNC)
BAS block, test, and set in use
BKIU block if in use
BL use block offsets
BSK block seek
CA copy avoid
CIO concurrent I/O
CLON clone
CLRD CL read
CR create
DF defer
DFI defer IND
DFLU data flush
DIR direct
DLY delay
DOCL do clone
DSYN data-only integrity
DTY must be a directory
EVO event only
EX open for exec
EXCL exclusive open
FSYN synchronous writes
GCDF defer during unp_gc() (AIX)
GCMK mark during unp_gc() (AIX)
GTTY accessed via /dev/tty
HUP HUP in progress
KERN kernel
KIOC kernel-issued ioctl
LCK has lock
LG large file
MBLK stream message block
MK mark
MNT mount
MSYN multiplex synchronization
NATM don't update atime
NB non-blocking I/O
NBDR no BDRM check
NBIO SYSV non-blocking I/O
NBF n-buffering in effect
NC no cache
ND no delay
NDSY no data synchronization
NET network
NFLK don't follow links
NMFS NM file system
NOTO disable background stop
NSH no share
NTTY no controlling TTY
OLRM OLR mirror
PAIO POSIX asynchronous I/O
PP POSIX pipe
R read
RC file and record locking cache
REV revoked
RSH shared read
RSYN read synchronization
RW read and write access
SL shared lock
SNAP cooked snapshot
SOCK socket
SQSH Sequent shared set on open
SQSV Sequent SVM set on open
SQR Sequent set repair on open
SQS1 Sequent full shared open
SQS2 Sequent partial shared open
STPI stop I/O
SWR synchronous read
SYN file integrity while writing
TCPM avoid TCP collision
TR truncate
W write
WKUP parallel I/O synchronization
WTG parallel I/O synchronization
VH vhangup pending
VTXT virtual text
XL exclusive lock
this list of names was derived from F* #define's in dialect header files <fcntl.h>, <linux</fs.h>, <sys/fcntl.c>, <sys/fcntlcom.h>, and <sys/file.h>; see the lsof.h header file for a list
showing the correspondence between the above short-hand names and the header file definitions;
the second list (after the semicolon) may contain short-hand names for kernel per-process open file flags from this table:
ALLC allocated
BR the file has been read
BHUP activity stopped by SIGHUP
BW the file has been written
CLSG closing
CX close-on-exec (see fcntl(F_SETFD))
LCK lock was applied
MP memory-mapped
OPIP open pending - in progress
RSVW reserved wait
SHMT UF_FSHMAT set (AIX)
USE in use (multi-threaded)
