On Fri, Aug 18, 2006 at 05:56:46PM +0800, Rowel Atienza wrote: > lsof <filename> > > returns 0 if the filename is being written.
s/being written/open or being written/ # >/var/log/test # lsof /var/log/test; echo $? 1 # perl -e 'open F, ">/var/log/test" or die $!; sleep 120;' & [1] 19421 # lsof /var/log/test; echo $? COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME perl 19421 root 3w REG 3,8 0 2577 /var/log/test 0 =-=-=-=-=-= lsof returns 1 if the file descriptor is closed or if the file doesn't exist. # >/var/log/test # lsof /var/log/test; echo $?; echo; tail -1 /var/log/test 1 # perl -le 'open F, ">/var/log/test" or die $!; select F; $|++; (print $i++), sleep 1 while $i <= 10; close F' & [1] 19631 # lsof /var/log/test; echo $?; echo; tail -1 /var/log/test COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME perl 19631 root 3w REG 3,8 16 2577 /var/log/test 0 7 # lsof /var/log/test; echo $?; echo; tail -1 /var/log/test [1]+ Done perl -le 'open F, ">/var/log/test" or die $!; select F; $|++; (print $i++), sleep 1 while $i <= 10; close F' 1 10 # lsof /nosuchfile &>/dev/null; echo $? 1 -- $_=q:; # SHERWIN # 70;72;69;6e;74;20; 27;4a;75;73;74;20; 61;6e;6f;74;68;65; 72;20;50;65;72;6c; 20;6e;6f;76;69;63; 65;27;:;;s=~?(..); ?=pack q$C$,hex$1; ;;;=egg;;;;eval;;; _________________________________________________ Philippine Linux Users' Group (PLUG) Mailing List [email protected] (#PLUG @ irc.free.net.ph) Read the Guidelines: http://linux.org.ph/lists Searchable Archives: http://archives.free.net.ph
