05-18-2006
Clearing file contents
Hi,
We need to clear the contents of a file. For this we tried using the commands like - '>filename' and 'cat filename > /dev/null'.
If the file size is large, the above commands will clear the file contents but the size of the file remains the same (checked using the command 'ls -l filename').
Are there any other UNIX commands which will empty the file contents?
Regards,
Raghavendra
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wmiir(1) General Commands Manual wmiir(1)
NAME
wmiir - The wmii 9P filesystem client
SYNOPSIS
wmiir [-a <address>] {create | ls [-dlp] | read | remove | write} <file>
wmiir [-a <address>] xwrite <file> <data> ...
wmiir -v
DESCRIPTION
wmiir is a simple 9P filesystem client which ships with wmii, and connects to its virtual filesystem by default. wmiir is most often used
to query and issue commands to wmii, both from the command line and from its sh-based configuration scripts.
ARGUMENTS
-a The address at which to connect to wmii.
COMMANDS
create <file>
Creates a new file or directory in the filesystem. Permissions and file type are inferred by wmii. The contents of the standard
input are written to the new file.
ls [-dlp] <path>
Lists the contents of <path>.
Flags:
-d Don't list the contents of directories.
-l Long output. For each file, list its permissions, owner, group, size (bytes), mtime, and name.
-p Print the full path to each file.
read <file>
Reads the entire contents of a file from the filesystem. Blocks until interrupted or EOF is received.
Synonyms: cat
remove <path>
Removes <path> from the filesystem.
Synonyms: rm
write <file>
Writes the contents of the standard input to <file>.
xwrite <file> <data> ...
Writes each argument after <file> to the latter.
ENVIRONMENT
$WMII_ADDRESS
The address at which to connect to wmii.
$NAMESPACE
The namespace directory to use if no address is provided.
SEE ALSO
wmii(1), libixp[2]
[1] http://www.suckless.org/wiki/wmii/tips/9p_tips
[2] http://libs.suckless.org/libixp
wmii-3.9.2 Oct, 2009 wmiir(1)