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Full Discussion: Efficient way to loop through list
Top Forums Shell Programming and Scripting Efficient way to loop through list Post 302977629 by Scrutinizer on Wednesday 20th of July 2016 04:23:21 PM
Old 07-20-2016
In bash or ksh93 you could use arrays, like so (keeping you col functions, but consolidating them into one:

Code:
varA="/var/tmp/hello_0_myapp
/var/tmp/mello_1_myapp
/var/tmp/jello_2_myapp
/var/tmp/fello_3_myapp"

oldIFS=$IFS
IFS=$'\n' 
arrA=( $varA )
IFS=$oldIFS

col() {
  eachfile=${arrA[$1]%%_*}
}

col 0; echo $eachfile
col 1; echo $eachfile
col 2; echo $eachfile
col 3; echo $eachfile


Output:
Code:
/var/tmp/hello
/var/tmp/mello
/var/tmp/jello
/var/tmp/fello

This User Gave Thanks to Scrutinizer For This Post:
SkySmart
 

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LEARN ABOUT PHP

cachefslog

cachefslog(1M)						  System Administration Commands					    cachefslog(1M)

NAME

       cachefslog - Cache File System logging

SYNOPSIS

       cachefslog [-f logfile | -h]  cachefs_mount_point

DESCRIPTION

       The  cachefslog	command displays where CacheFS statistics are being logged. Optionally, it sets where CacheFS statistics are being logged,
       or it halts logging for a cache specified by cachefs_mount_point. The cachefs_mount_point argument is a mount point of a cache file system.
       All file systems cached under the same cache as cachefs_mount_point will be logged.

OPTIONS

       The following options are supported. You must be super-user to use the -f and -h options.

       -f logfile      Specify the log file to be used.

       -h	       Halt logging.

OPERANDS

       cachefs_mount_point     A mount point of a cache file system.

USAGE

       See largefile(5) for the description of the behavior of cachefslog when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes).

EXAMPLES

       Example 1: Checking the Logging of a directory.

       The example below checks if the directory /home/sam is being logged:

       example% cachefslog /home/sam
       not logged: /home/sam

       Example 2: Changing the logfile.

       The example below changes the logfile of  /home/sam to /var/tmp/samlog:

       example# cachefslog -f /var/tmp/samlog /home/sam
       /var/tmp/samlog: /home/sam

       Example 3: Verifying the change of a logfile.

       The example below verifies the change of the previous example:

       example% cachefslog /home/sam
       /var/tmp/samlog: /home/sam

       Example 4: Halting the logging of a directory.

       The example below halts logging for the /home/sam directory:

       example# cachefslog -h /home/sam
       not logged: /home/sam

EXIT STATUS

       The following exit values are returned:

       0	       success

       non-zero        an error has occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cachefsstat(1M), cachefswssize(1M), cfsadmin(1M), attributes(5), largefile(5)

DIAGNOSTICS

       Invalid path    It is illegal to specify a path within a cache file system.

SunOS 5.10							    7 Feb 1997							    cachefslog(1M)
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