08-20-2015
What operating system and shell are you using?...
This is what shell array variables are designed for (if your shell supports them); otherwise you need something like eval (and eval is dangerous except under very limited circumstances).
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I want to define a variable like this. Can i declare such type?
I have already define this, but error is displaying sysntax error. So tell me what will be the write.
int create_mailfile(int,char*,char*,char*,char*,char*,char*); (1 Reply)
Discussion started by: debasis.mishra
1 Replies
2. Shell Programming and Scripting
HI
I want to create a date folder and then a log file under it, which will hold all output of shell script. Say shell script abc.sh runs every day and I want to redirect the output of abc.sh > /opt/bea/wls81/Pkmtest/$(date +%Y%m%d)/ant.log.
Here date should always change according to system... (2 Replies)
Discussion started by: pankajkrmishra
2 Replies
3. UNIX for Advanced & Expert Users
This my script
ls *.ksh
ls *.ksh > a.txt
i=1
cat "a.txt" | while read a
do
if
then
echo "abc"
echo "abc" > m.ksh
echo "m.ksh" >> a.txt
i=2
fi
echo $a
done
ls *.ksh
--------------------------
My Output is
a.ksh - > first ls *.ksh (1 Reply)
Discussion started by: kingganesh04
1 Replies
4. Shell Programming and Scripting
I found one post in another site with a solution for my problem
the below solution should explain what I want.
#!/bin/sh
first="one"
second="two"
third="three"
myvar="first"
echo ${!myvar}
But this gives error 'bad substitution'
System info
SunOS sundev2 5.9... (3 Replies)
Discussion started by: johnbach
3 Replies
5. Shell Programming and Scripting
I need some variable help
TEMP1=Jane
TEMP2=Sue
X=1
eval USER=TEMP${X}
echo $USER
This gives output USER1
I would like to get Jane
I have tried
eval USER='TEMP${X}'
eval USER="TEMP${X}"
eval USER=`TEMP${X}` (3 Replies)
Discussion started by: Jotne
3 Replies
6. Shell Programming and Scripting
Hi guys.
i have a requirment as below.
I have a scripts which perform for loop
for i in /backup/logs -- it will give all the logs file
SC_RIO_RWVM_20120413064217303.LOG
SC_RIO_RWXM_20120413064225493.LOG
SC_RIO_RXXM_20120413064233273.LOG
...
do
open script.sh ---- in this file... (3 Replies)
Discussion started by: guddu_12
3 Replies
7. Red Hat
I am attempting to create a script that would allow me to list all the instances associated with a DB2 and then prompt the user to choose which one to issue the db2profile command against. I use the db2 command db2ilist to get a list of the instances for a particular server, but the number of... (1 Reply)
Discussion started by: slatoms
1 Replies
8. Shell Programming and Scripting
I am attempting to create a script that would allow me to list all the instances associated with a DB2 and then prompt the user to choose which one to issue the db2profile command against. I use the db2 command db2ilist to get a list of the instances for a particular server, but the number of... (7 Replies)
Discussion started by: slatoms
7 Replies
9. Shell Programming and Scripting
I have a small program which needs to pass variable dynamically to form the name of a second variable whose value wil be passed on to a third variable.
***************** Program Start ******************
LOC1=/loc1
PAT1IN=/loc2
PAT2IN=/loc3
if ; then
for fpattern in `cat... (5 Replies)
Discussion started by: Cyril Jos
5 Replies
10. Shell Programming and Scripting
#!/bin/sh
if
then
echo "Insufficient number of arguments ">> error".log" ;
echo "Please check error log for more details";
exit 1 ;
else
file_name=$1".csv";
fi ;
in_par_number=`head -n1 $file_name | sed 's///g' | wc -c`
read -a arr <<< `head -n1 $file_name | sed 's// /g'`
... (6 Replies)
Discussion started by: JayDoshi
6 Replies
exec(1) User Commands exec(1)
NAME
exec, eval, source - shell built-in functions to execute other commands
SYNOPSIS
sh
exec [argument...]
eval [argument...]
csh
exec command
eval argument...
source [-h] name
ksh
*exec [arg...]
*eval [arg...]
DESCRIPTION
sh
The exec command specified by the arguments is executed in place of this shell without creating a new process. Input/output arguments may
appear and, if no other arguments are given, cause the shell input/output to be modified.
The arguments to the eval built-in are read as input to the shell and the resulting command(s) executed.
csh
exec executes command in place of the current shell, which terminates.
eval reads its arguments as input to the shell and executes the resulting command(s). This is usually used to execute commands generated as
the result of command or variable substitution.
source reads commands from name. source commands may be nested, but if they are nested too deeply the shell may run out of file descrip-
tors. An error in a sourced file at any level terminates all nested source commands.
-h Place commands from the file name on the history list without executing them.
ksh
With the exec built-in, if arg is given, the command specified by the arguments is executed in place of this shell without creating a new
process. Input/output arguments may appear and affect the current process. If no arguments are given the effect of this command is to mod-
ify file descriptors as prescribed by the input/output redirection list. In this case, any file descriptor numbers greater than 2 that are
opened with this mechanism are closed when invoking another program.
The arguments to eval are read as input to the shell and the resulting command(s) executed.
On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:
1. Variable assignment lists preceding the command remain in effect when the command completes.
2. I/O redirections are processed after variable assignments.
3. Errors cause a script that contains them to abort.
4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not
performed.
EXIT STATUS
For ksh:
If command is not found, the exit status is 127. If command is found, but is not an executable utility, the exit status is 126. If a redi-
rection error occurs, the shell exits with a value in the range 1-125. Otherwise, exec returns a zero exit status.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO
csh(1), ksh(1), sh(1), attributes(5)
SunOS 5.10 17 Jul 2002 exec(1)