I'm currently using the > /myfile.log command to reset the file size to 0 byte. However, this > command does not necessary work for all logs. Sometimes the file size is not set to 0 instead lots of empty spaces are pipe into the file instead. When this happen, the file size show using "ls -l /myfile.log" and "du -sk" show dispute size. Anyone has any idea why the diff in file size using the 2 different command?
File size difference when nulling a file
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- 1. Popen not returning NULL on failure
Popen is not behaving as per the man page in Solaris 5.8 fptr = popen("exe", "r") Even though , file "exe" does not exist , fptr is not set to NULL. Is there a way that can tell the failure of popen. Even the errono is not set. errono is still 0. Just a message " sh : exe could not be found " is printed when pclose() is called. This time errno is set. Thanks - 2. strip for Solaris 9 / Sparc
Hello Solaris wizards and users. I use Solaris 9 on Sparc. I installed gcc from Companion Software CD, but I have problem with strip. When I use strip my binary won't work because it can't find ELF. I read about that problem and people suggested using original Solaris (Sun?) strip. But where is it? How to find one? - 3. /var/spool/pkg
I fear I have done a foolish thing... Sometime in the past, likely November 2003, I moved /var/spool/pkg from the real /var to another disk and created a link from the real /var/spool/pkg to the directory elsewhere (probably because /var was short of disk space). In the intervening period, I seem to have lost the entire contents of the directory, with the exception of SMClibgcc/ SMCperl/ SMCsamba/ I don't suppose (he said, pathetically hopefully) there's any way of recreating this directory (or rather it's contents), is there? I have no backups that old. Also, rather oddly, pkginfo no longer produces any output at all, not even about the packages that remain in /var/spool/pkg. Why's that? I successfully installed the Solaris 8 Recommended patch cluster a few weeks ago, and I thought that wouldn't work without a valid /var/spool/pkg? patchadd -p no longer works; anubis{root}40: patchadd -p /usr/sbin/patchadd[6]: /var/sadm/pkg: not found grep: can't open */pkginfo grep: can't open */pkginfo /usr/sbin/patchadd[15]: /var/sadm/pkg: not found No patches installed I've done this on two boxes, too. (One an Ultra-2, the other an Ultra-10, both with Sol 8). I suspect I did something dumb in order to get the patch kit to install. Help! -- "Other people are not your property." [email me at huge [at] huge [dot] org [dot] uk] - 4. root can't execute chown on NFS mountpoint
Hi group, today I was made aware of one of my Solaris 9 machines behaving somewhat strangely. A local directory which serves as NFS mountpoint does not let root execute chown: | # ls -l | drwxrwxrwx 3 root root 4096 Oct 13 09:38 GNE | # chown oracle:dba GNE | chown: GNE: Not owner | # Unfortunately I can't umount that share at the moment because the database thereon can't be shut down before next week (I was hoping that if the NFS mount was gone, the chown would work). Is this the regular behavior of a NFS mountpoint? Or am I missing some other detail which would explain this? Mark -- Ich bin ein freier Mensch und werde jetzt von meinen Freiheitsrechten Gebrauch machen - und zwar ausgiebig - natlich nur in dem Rahmen, den Otto Schily mir noch zur Verfung stellt. -- Wolfgang Clement
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File size difference when nulling a file
by wenglee68 » Thu, 03 Jun 2004 11:52:30 GMT
Re: File size difference when nulling a file
by Neil W Rickert » Thu, 03 Jun 2004 12:40:26 GMT
XXXX@XXXXX.COM (Fetch68) writes: Most likely there is another program writing to the file, and remembering a seek position for the next write. After you truncate the file, it still seeks to beyond where it last wrote to the file, resulting in a sparse file as it seeks past unallocated space.
Re: File size difference when nulling a file
by Casper H.S. Dik » Thu, 03 Jun 2004 18:42:22 GMT
XXXX@XXXXX.COM (Fetch68) writes: "ls -l" will show the index of the last byte in the file; but since most are 0s, "du -sk" will show only a few blocks used. The difference between the behavioru between programs is whether or not the programs used "O_APPEND" when opening the file; with O_APPEND each write is preceeded by a seek(fd, 0, SEEK_END) (pointer repositioned at EOF); without each write will follow the previous write even if the file was truncated in between. Casper -- Expressed in this posting are my opinions. They are in no way related to opinions held by my employer, Sun Microsystems. Statements on Sun products included here are not gospel and may be fiction rather than truth.
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