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Top Forums Shell Programming and Scripting Create Log File in ksh itself Post 302653347 by Corona688 on Friday 8th of June 2012 04:51:50 PM
Old 06-08-2012
Yes, you can. The exec builtin can redirect file descriptors for an entire script, just like you'd redirect for external programs.

Code:
#!/bin/ksh

# Redirect the current stderr into stdout
exec 2>&1
# Redirect the current stdout into the log file
exec 1>timer_log.log

# Should end up in timer_log.log
echo "This is a message"
# Should also end up in timer_log.log
echo "This is an error message!" >&2

This User Gave Thanks to Corona688 For This Post:
 

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INOTICOMING(1)							    INOTICOMING 						    INOTICOMING(1)

NAME
inoticoming - trigger actions when files hit an incoming directory SYNOPSIS
inoticoming [ global-options ] directory actions* DESCRIPTION
Inoticoming is a daemon to watch a directory with Linux's inotify framework and trigger actions once files with specific names are placed in there. For example it can be used to wait for .changes files uploaded into a directory and call reprepro to put them into your repository. GLOBAL OPTIONS
--foreground Do not fork, but stay in the foreground and log to stderr. --logfile filename After forking in the background, log to the specified filename instead of syslog. --pid-file filename Write the pid of the running instance into filename. --initialsearch First search the directory for files already existing and process them with the given rules as if they just appeared. If files show up in this inital phase, they may be processed twice, but should never be missed. (Unless they are too many and the inotify queue overflows). ACTIONS
Each action description is an optional list of options for this action (which files to call it for, what directory to change into before executing it, ...), followed by the command and its arguments ended with a single ; as argument. Like: inoticoming --foreground / --regexp ^v echo There appeared {} in the root directory. ; (Note that the before the ; is needed if and only if you calling it from a shell or anything else interpreting the ; on its own). ACTION OPTIONS --prefix string Only trigger this action, if the filename starts with the specified string. --suffix string Only trigger this action, if the filename ends with the specified string. --regexp regular expression Only trigger this action, if the filename matches the specified regular expression. --chdir directory Change into directory before executing the specified commands. (Note that since it is a well-behaved daemon, its working directory is / which will be inherited by all actions). --stdout-to-log Redirect the command's output (stdout) to the logfile. --stderr-to-log Redirect the command's error output (stderr) to the logfile. EXAMPLES
inoticoming --logfile logs/ilog --pid-file pid $INCOMINGDIR --suffix .changes --stderr-to-log reprepro -s -b $REPREPROBASEDIR --waitforlock 1000 processincoming rulename {} ; This will call reprepro for every new .changes file. Note that giving {} as argument to processincoming (which inoticoming will replace with the filename) so that only that .changes file is processed and reprepro will not complain about a possible other yet incomplete .changes file is only available starting with reprepro version 2.2.2. PROBLEMS
There is no handling of queue overflows yet. REPORTING BUGS
Report bugs or wishlist requests to the Debian BTS (e.g. by using reportbug inoticoming under Debian) or directly to <brlink@debian.org>. COPYRIGHT
Copyright (C) 2007 Bernhard R. Link This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. inoticoming 2007-08-18 INOTICOMING(1)
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