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Full Discussion: Error: if condition
Top Forums Shell Programming and Scripting Error: if condition Post 302867787 by Akshay Hegde on Friday 25th of October 2013 03:59:07 AM
Old 10-25-2013
Quote:
Originally Posted by gnnsprapa
please follow below code

if [ eval echo '$lck_'$TABLE != "" ]; then

its giving me an error as "test1.sh: line 3: [: too many arguments"

if i store eval echo '$lck_'$TABLE != "" result into sme variable n then use in if cond its working fine...say

r=$(eval echo '$lck_'$TABLE != "")
if [ r != "" ]

can anyone tell me how to do inside if condition...with out use any variable..

TIA


Try this

Code:
# lck is empty nothing to print
$ echo $lck  

# table is empty nothing to print
$ echo $table

# lck is as not NULL print Yes
$ lck=as
$ if [ $lck'_'$table != "_" ]; then echo "Yes";else echo "No";fi
Yes

# Make lck empty print No
$ unset lck
$ if [ $lck'_'$table != "_" ]; then echo "Yes";else echo "No";fi
No

Last edited by Akshay Hegde; 10-25-2013 at 05:32 AM.. Reason: Comment
 

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LEARN ABOUT OPENDARWIN

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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