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UNIX for Dummies Questions & Answers
displaying/ counting lines
Post 302130684 by aga on Tuesday 7th of August 2007 10:51:46 AM
08-07-2007
displaying/ counting lines
I have a file called xx with the env redirected into it 5 times:
env >> xx
env >> xx
env >> xx
env >> xx
env >> xx
I have to read an input file (here: xx) and look for occurrences of the current user who is executing this script. Once finding an occurrence of the username I have to take that line and append it to a file and display a line number and a bracket against the saved line. The file should look lie that:
1) PWD=...
2) USER=...
3) MAIL=...
4) LOGNAME=...
5) HOME=...
6) PWD=...
7) USER=...
8) MAIL=...
9) LOGNAME=l...
10) HOME=...
I can not use temporary file, sed, awk...
Can somebody help me
So far I' ve got something like this:
echo "Give the name of the file: "
read fileName
egrep -w "PWD" $fileName | cat -b >> $fileName
egrep -w "USER" $fileName | cat -b >> $fileName
egrep -w "MAIL" $fileName | cat -b >> $fileName
egrep -w "LOGNAME" $fileName | cat -b >> $fileName
egrep -w "HOME" $fileName | cat -b >> $fileName
env >> xx
env >> xx
env >> xx
env >> xx
env >> xx
I have to read an input file (here: xx) and look for occurrences of the current user who is executing this script. Once finding an occurrence of the username I have to take that line and append it to a file and display a line number and a bracket against the saved line. The file should look lie that:
1) PWD=...
2) USER=...
3) MAIL=...
4) LOGNAME=...
5) HOME=...
6) PWD=...
7) USER=...
8) MAIL=...
9) LOGNAME=l...
10) HOME=...
I can not use temporary file, sed, awk...
Can somebody help me
So far I' ve got something like this:
echo "Give the name of the file: "
read fileName
egrep -w "PWD" $fileName | cat -b >> $fileName
egrep -w "USER" $fileName | cat -b >> $fileName
egrep -w "MAIL" $fileName | cat -b >> $fileName
egrep -w "LOGNAME" $fileName | cat -b >> $fileName
egrep -w "HOME" $fileName | cat -b >> $fileName
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LEARN ABOUT OPENDARWIN
env
ENV(1) BSD General Commands Manual ENV(1) NAME
env -- set and print environment SYNOPSIS
env [-i] [name=value ...] [utility [argument ...]] DESCRIPTION
env executes utility after modifying the environment as specified on the command line. The option name=value specifies an environmental variable, name, with a value of value. The option '-i' causes env to completely ignore the environment it inherits. If no utility is specified, env prints out the names and values of the variables in the environment, with one name=value pair per line. DIAGNOSTICS
If the utility is invoked, the exit status of env shall be the exit status of utility; otherwise, the env utility exits with one of the fol- lowing values: 0 The env utility completed successfully 1-125 An error occurred in the env utility. 126 The utility specified by utility was found, but could not be invoked. 127 The utility specified by utility could not be found. COMPATIBILITY
The historic - option has been deprecated but is still supported in this implementation. SEE ALSO
execvp(3), environ(7) STANDARDS
The env utility conforms to IEEE Std 1003.2-1992 (``POSIX.2''). BUGS
env doesn't handle commands with equal (``='') signs in their names, for obvious reasons. BSD
August 27, 1993 BSD