|
How to do things AI Noob vs. Pro
List biggest files Free Open Source: Swiss File Knifea command line
Depeche View
command line
free external tools,
cpp sources
articles
|
sfk tail [-lines=n] [-f[ollow] [filename]
sfk ... +[t]tail [-lines=n]
1. print last lines of a file, optionally following changes.
to use file content processing, provide a single filename.
2. print last text lines procuded by a previous command.
to process chain text ttail is recommended.
options
-lines=n print last n lines (default is 10).
-follow or -f waits for file changes, printing them endlessly.
if file is recreated or shrunk, rereads the last lines.
to post-process tail output, e.g. with +filter, always
add +loop at the end of the command sequence.
-nowait if tail is reached multiple times in a chain by +loop
then do not wait for a file size change but force
stepping of the command chain.
-quiet do not tell verbosely about read restarts.
-polltime=n with -follow, specifies the delay in milliseconds before
the file is checked again for changes. default is 500.
-altsize use a different method to determine the file size
(stat instead of seek). may help if the default method
fails to read the file, or to improve performance.
-verbose tell in detail what is done.
aliases
sfk tail50 in.txt same as tail -lines=50
see also
sfk filter -tail=n read and search last n lines of text files.
sfk view GUI tool to view all text files of a folder, then jump
through file ends by ctrl+end.
examples
sfk tail -follow logs\access.log
immediately lists last lines, then all added lines over time.
sfk tail -f c:\temp\log.txt +filter -+error: -+warning: +loop
endless filter of error and warning messages from log.txt.
example sfk script with conditional execution
file logfilter.txt:
sfk label checklog
+tail -follow logfile.txt
+tee toterm +storetext
+filter -+error: -justrc
+if "rc>0" call myalert
+gettext +filter -+alldone: -justrc
+if "rc>0" stop
+loop +end
sfk label myalert
+then run -yes "myalert.bat" +end
sfk script logfilter.txt
will run myalert.bat whenever errors appear in logfile.txt.
the script stops as soon as "alldone" appears in the log.
to allow double filtering of the chain text it must be
stored before the first filter, then restored.
scripted example
if you want to both tail and filter on several phrases,
the command may become hard to read and to edit. as an
alternative, you may put it into a batch embedded sfk script,
e.g. under windows, create a file
filtlog.bat:
@echo off
sfk script filtlog.bat -from begin
goto xend
sfk label begin
+tail -f log.txt
+filter
-high red error:*
-high yellow warning:*
-high blue debug:*
+loop
:xend
then type "filtlog". creating command sequences this way
allows better readability, and easy editing in any editor.
see also
sfk filter - all options for selection and post-processing of text
sfk partcopy - copy byte block from the beginning of a file
sfk script - how to create script files with sfk commands
sfk samp - ready-to-use templates for windows and linux scripts
sfk tail [-lines=n] [-f[ollow] [filename]
sfk ... +[t]tail [-lines=n]
1. print last lines of a file, optionally
following changes. to use file content
processing, provide a single filename.
2. print last text lines procuded by a
previous command. to process chain text
ttail is recommended.
options
-lines=n print last n lines (default
is 10).
-follow or -f waits for file
changes, printing them
endlessly.
if file is recreated or
shrunk, rereads the last
lines. to post-process tail
output, e.g. with +filter,
always add +loop at the end
of the command sequence.
-nowait if tail is reached multiple
times in a chain by +loop
then do not wait for a file
size change but force
stepping of the command
chain.
-quiet do not tell verbosely about
read restarts.
-polltime=n with -follow, specifies the
delay in milliseconds
before
the file is checked again
for changes. default is 500.
-altsize use a different method to
determine the file size
(stat instead of seek). may
help if the default method
fails to read the file, or
to improve performance.
-verbose tell in detail what is done.
aliases
sfk tail50 in.txt same as tail
-lines=50
see also
sfk filter -tail=n read and search
last n lines of text
files.
sfk view GUI tool to view all text
files of a folder, then
jump through file ends by
ctrl+end.
examples
sfk tail -follow logs\access.log
immediately lists last lines, then
all added lines over time.
sfk tail -f c:\temp\log.txt +filter
-+error: -+warning: +loop
endless filter of error and warning
messages from log.txt.
example sfk script with conditional
execution
file logfilter.txt:
sfk label checklog
+tail -follow logfile.txt
+tee toterm +storetext
+filter -+error: -justrc
+if "rc>0" call myalert
+gettext +filter -+alldone: -justrc
+if "rc>0" stop
+loop +end
sfk label myalert
+then run -yes "myalert.bat" +end
sfk script logfilter.txt
will run myalert.bat whenever errors
appear in logfile.txt. the script
stops as soon as "alldone" appears in
the log. to allow double filtering of
the chain text it must be stored
before the first filter, then restored.
scripted example
if you want to both tail and filter on
several phrases, the command may become
hard to read and to edit. as an
alternative, you may put it into a
batch embedded sfk script, e.g.
under windows, create a file
filtlog.bat:
@echo off
sfk script filtlog.bat -from begin
goto xend
sfk label begin
+tail -f log.txt
+filter
-high red error:*
-high yellow warning:*
-high blue debug:*
+loop
:xend
then type "filtlog". creating command
sequences this way allows better
readability, and easy editing in any
editor.
you are viewing this page in mobile portrait mode with a limited layout. turn your device right, use a desktop browser or buy the sfk e-book for improved reading. sfk is a free open-source tool, running instantly without installation efforts. no DLL's, no registry changes - just get sfk.exe from the zip package and use it (binaries for windows, linux and mac are included).
|
