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Top Forums UNIX for Dummies Questions & Answers Problem with test syntax in script Post 302696245 by Corona688 on Tuesday 4th of September 2012 01:04:41 PM
Old 09-04-2012
You don't need to run ID 5 times to get 5 different pieces of data from it. Run it once, get all the data from it the first time.

You are using single quotes, which take their contents literally, where you need backticks, which run their contents. But you don't even need that statement.

You don't need to do \( all the time, just use quotes. Variables will expand inside double-quotes, even, so you don't need to end the quotes to use a variable.

Whenever you're doing if [ `... | wc -l` -gt somevalue ] to check something, you've probably missed a simpler way. Here, since I've overwritten the $1 ... arguments, I use the special "$#" variable, the number of arguments instead.

Code:
        USUARIO=$1
        DATA=`id $USARIO 2>/dev/null` # Save the data, ignore the error strings
	if [ $? -ne 0 ]
	then
		echo "El usuario $USUARIO no existe"
		exit
	fi

        # Note that $DATA is not in quotes and MUST NOT be in quotes.
        set -- $DATA # $1=NOMBRE, $2=GRUPOID, $3=GRUPOID2, etc.

	echo "(UID) y nombre: $1"
	echo "(GID) y numero de goup1: $2"
        [ "$#" -gt 2 ] && echo "(GID2) y numero de group2: $3"


Last edited by Corona688; 09-04-2012 at 02:13 PM..
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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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