Who’s Accessing That File?

From the occasionally-useful-scripts library…

It’s like fuser but shows name of the process (args[0]). Needs lsof installed. I’ve used it on Linux and Solaris.

nap01:~$ cat jduser
#!/bin/sh
[ -n "$1" ] && [ -d "$1" ] || { echo "Usage: $0 [dir]"; exit; }
AWK=awk; [ "`uname`" = "SunOS" ] && AWK=nawk;
lsof +d $1|
   tail +2|
   sort -k9|
   $AWK '{ a=$9;
           if(lasta!=a){lasta=a;printf "n"a":n        "};
           system("printf \"["$2"]`ps -p "$2" -o args|"
                "tail +2|cut -f1 -d\\" \\"` \"") }
         END{print "n"}'
nap01:~$ ./jduser
Usage: ./jduser [dir]
nap01:~$ ./jduser /u04/oracle/oradata/jt10g

/u04/oracle/oradata/jt10g/control01.ctl:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7132]ora_ckpt_jt10g
/u04/oracle/oradata/jt10g/control02.ctl:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7132]ora_ckpt_jt10g
/u04/oracle/oradata/jt10g/control03.ctl:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7132]ora_ckpt_jt10g
/u04/oracle/oradata/jt10g/example01.dbf:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7134]ora_smon_jt10g
/u04/oracle/oradata/jt10g/redo01.log:
        [7130]ora_lgwr_jt10g
/u04/oracle/oradata/jt10g/redo02.log:
        [7130]ora_lgwr_jt10g
/u04/oracle/oradata/jt10g/redo03.log:
        [7130]ora_lgwr_jt10g
/u04/oracle/oradata/jt10g/sysaux01.dbf:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7134]ora_smon_jt10g 
        [7140]ora_mmon_jt10g
/u04/oracle/oradata/jt10g/system01.dbf:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7132]ora_ckpt_jt10g 
        [7134]ora_smon_jt10g [7136]ora_reco_jt10g [7138]ora_cjq0_jt10g 
        [7140]ora_mmon_jt10g [12062]oraclejt10g
/u04/oracle/oradata/jt10g/temp01.dbf:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7134]ora_smon_jt10g
/u04/oracle/oradata/jt10g/undotbs01.dbf:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7134]ora_smon_jt10g 
        [7140]ora_mmon_jt10g
/u04/oracle/oradata/jt10g/users01.dbf:
        [7128]ora_dbw0_jt10g [7130]ora_lgwr_jt10g [7134]ora_smon_jt10g 
        [7140]ora_mmon_jt10g

And yes, all that escaping does make my head hurt.

On an unrelated note Padraig just pointed out this useful utility called OraSRP to process extended SQL trace files. Cool!