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Full Discussion: Reading a file with while into variable and using in another process
Top Forums Shell Programming and Scripting Reading a file with while into variable and using in another process Post 302369195 by cfajohnson on Friday 6th of November 2009 09:36:15 PM
Old 11-06-2009
Quote:
Originally Posted by redhead
how about somethign like this:
Code:
#!/bin/ksh
for line in `/usr/bin/cat /u1/cutshellb.txt`; do
 /u1/sendreportmail.sh "$line" 1>sendmail.log 2>&1
done

and in the script have:
Code:
cd /u1/mail/bin/
./mailsend -i -vvvv   -tany_person@mailaddress.uk -s "Mail report " 
 -a/u1/$1.pdf "  "

But why not simply incorporate the mailsend command into the orriginal script ?
like:
Code:
#!/bin/ksh
for line in `/usr/bin/cat /u1/cutshellb.txt`; do


Code:
bash: /usr/bin/cat: No such file or directory

More accurate would be:

Code:
for word in `/usr/bin/cat /u1/cutshellb.txt`; do

You are reading a word, not a line, into the variable.


The correct way to read a file line by line is:

Code:
while IFS= read -r line
do
  : do whatever
done < /u1/cutshellb.txt

In bash4, you can read a file into an array with mapfile:

Code:
mapfile -t array < /u1/cutshellb.txt

 

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LEARN ABOUT OPENSOLARIS

getusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

	 /bin/bash		    /bin/csh
	 /bin/jsh		    /bin/ksh
	 /bin/ksh93		    /bin/pfcsh
	 /bin/pfksh		    /bin/pfsh
	 /bin/sh		    /bin/tcsh
	 /bin/zsh		    /sbin/jsh
	 /sbin/pfsh		    /sbin/sh
	 /usr/bin/bash		    /usr/bin/csh
	 /usr/bin/jsh		    /usr/bin/ksh
	 /usr/bin/ksh93 	    /usr/bin/pfcsh
	 /usr/bin/pfksh 	    /usr/bin/pfsh
	 /usr/bin/sh		    /usr/bin/tcsh
	 /usr/bin/zsh		    /usr/sfw/bin/zsh
	 /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

NOTES

       Restricted shells should not be listed in /etc/shells.

SunOS 5.11							    1 Nov 2007							  getusershell(3C)
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