10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a ksh shell script and i need to pass arguments which are generated by data pulled from a database.
When the argument to the shell script is too long (about 4000 charecters) the below is the issue observed.
I copy the command which is 4000 charecters long from the logs and paste it... (7 Replies)
Discussion started by: mohtashims
7 Replies
2. Red Hat
I am Not sure why following script is not capturing the counts only when using crontab !! when I run it fromt he command line it is fine ! what is missing here !
#!/usr/bin/ksh
host=`uname -n`
tdate=`date`
userid='dbid/password'
totalevents=`sqlplus -s $userid << -
set timing off
... (1 Reply)
Discussion started by: mrn6430
1 Replies
3. Shell Programming and Scripting
We are migrating some scripts (ksh) from Solaris 10 to Linux 2.6.32.
Can someone share list of changes i need to take care for this ?
Have found few of them but i am looking for a exhaustive list.
Thanks. (6 Replies)
Discussion started by: Shivdatta
6 Replies
4. Shell Programming and Scripting
Overview:
I have an AWK program that parses thru a database backup
server log file and outputs ths following parameters
SRNO DATE : TIME SIZE IN(KB) DATABASE NAME DUMP TYPE
1 May 16 2012: 13:30:00 6874 TestDB database
2 May 16 2012: 13:30:44 11462 master database
Problem:
This program has... (5 Replies)
Discussion started by: JolietJake
5 Replies
5. Linux
Clear in Linux
#!/usr/bin/ksh
am using clear in the script, but it is not working,
it gives an error as follows,
'xterm': unknown terminal type.
please help out.:confused:
---------- Post updated at 01:19 PM ---------- Previous update was at 12:01 PM ----------
if
then
... (2 Replies)
Discussion started by: pradebban
2 Replies
6. Shell Programming and Scripting
Hello,
I'm trying to create a muliti value shell variable with newlines inside it, So that I can read the values of that variable individually line by line, but KSH seems to be stripping my variable of newlines in LINUX, but UNIX its working fine.
Here's Example :
String =... (3 Replies)
Discussion started by: Sanju1236
3 Replies
7. Shell Programming and Scripting
Guys,
I would like to discuss the problem I am seeing with echo “\n” statement in Redhat Linux Enterprise 5.3 version. I have a shell script that was written couple of years back for generic UNIX platforms based on ksh and was tested on Solaris 8,9,10 ; AIX 5.3 and Red Hat Enterprise Linux... (5 Replies)
Discussion started by: rijeshpp
5 Replies
8. Shell Programming and Scripting
Hi,
I need to cut filename in Linux ksh.
for example file name is c_xxxx_cp_200908175035.zip. I need to get variable with only c_xxxx_cp value. (10 Replies)
Discussion started by: juliyp
10 Replies
9. Shell Programming and Scripting
user_account()
{
set -x
nodename=$1
# set userid to user0
userid="user0"
echo outside:pid $$
cat $MY_DIR/user_accounts | while read line
do
# line="node1 user1"
echo inside do: pid $$ line:$line userid:$userid
poss_node=`echo $line |awk '{print $1}'`... (2 Replies)
Discussion started by: jasmeet100
2 Replies
10. Shell Programming and Scripting
Hi All,
Currently iam going to migrate some of the ksh scripts from HPUX to LINUX.
Will there be any major change in scripts which I have to take care for migration?
Appreciate some help on this.
Thanks
Om (1 Reply)
Discussion started by: Omkumar
1 Replies
shell_builtins(1) User Commands shell_builtins(1)
NAME
shell_builtins, case, for, foreach, function, if, repeat, select, switch, until, while - shell command interpreter built-in commands
DESCRIPTION
The shell command interpreters csh(1), ksh(1), ksh93(1), and sh(1) have special built-in commands. The commands case, for, foreach, func-
tion, if, repeat, select, switch, until, and while are commands in the syntax recognized by the shells. They are described in the Commands
section of the manual pages of the respective shells. In ksh93(1), fc, hash, stop, suspend, times, and type are aliases by default. In
ksh93, the following built-ins are bound to the /bin pathname by default and are invoked if the pathname search encounters an executable
command of that name in the /bin or /usr/bin directory: cat, chown, getconf, head, mkdir, rmdir, tee, uniq, and wc.
The remaining commands listed in the following table are built into the shells for reasons such as efficiency or data sharing between com-
mand invocations. They are described on their respective manual pages.
Command Shell
-----------------------------------------------------------
++**alias csh, ksh, ksh93
bg csh, ksh, ksh93, sh
+*break csh, ksh, ksh93, sh
builtin ksh93
case csh, ksh, ksh93, sh
cat ksh93
cd csh, ksh, ksh93, sh
chdir csh, sh
chown ksh93
command ksh93
+*continue csh, ksh, ksh93, sh
dirs csh
disown ksh93
echo csh, ksh, ksh93, sh
+*eval csh, ksh, ksh93, sh
+*exec csh, ksh, ksh93, sh
+*exit csh, ksh, ksh93, sh
++**export ksh, ksh93, sh
false ksh, ksh93
fc ksh, ksh93
fg csh, ksh, ksh93, sh
for ksh, ksh93, sh
foreach csh
function ksh, ksh93
getconf ksh93
getopts ksh, ksh93, sh
glob csh
goto csh
hash ksh, ksh93, sh
hashstat csh
head ksh93
hist ksh93
history csh
if csh, ksh, ksh93, sh
jobs csh, ksh, ksh93, sh
kill csh, ksh, ksh93, sh
let ksh, ksh93,
limit csh
login csh, ksh, ksh93, sh
logout csh
mkdir ksh93
nice csh
+*newgrp ksh, ksh93, sh
nohup csh
notify csh
onintr csh
popd csh
print ksh, ksh93
printf ksh93
pushd csh
pwd ksh, ksh93, sh
read ksh, ksh93, sh
++**readonly ksh, ksh93, sh
rehash csh
repeat csh
+*return ksh, ksh93, sh
select ksh, ksh93
+set csh, ksh, ksh93, sh
setenv csh
shift csh, ksh, ksh93, sh
sleep ksh93
source csh
stop csh, ksh, ksh93, sh
suspend csh, ksh, sh
switch csh
tee ksh93
test ksh, ksh93, sh
time csh
*times ksh, ksh93, sh
*+trap ksh, ksh93, sh
true ksh, ksh93
type ksh, ksh93, sh
++**typeset ksh, ksh93
ulimit ksh, ksh93, sh
umask csh, ksh, ksh93, sh
+unalias csh, ksh, ksh93
unhash csh
uniq ksh93
unlimit csh
+unset csh, ksh, ksh93, sh
unsetenv csh
until ksh, ksh93, sh
*wait csh, ksh, ksh93, sh
whence ksh, ksh93
while csh, ksh, ksh93, sh
Bourne Shell, sh, Special Commands
Input/output redirection is now permitted for these commands. File descriptor 1 is the default output location. When Job Control is
enabled, additional Special Commands are added to the shell's environment.
In addition to these built-in reserved command words, sh also uses:
: No effect; the command does nothing. A zero exit code is returned.
.filename Read and execute commands from filename and return. The search path specified by PATH is used to find the directory contain-
ing filename.
C shell, csh
Built-in commands are executed within the C shell. If a built-in command occurs as any component of a pipeline except the last, it is exe-
cuted in a subshell. In addition to these built-in reserved command words, csh also uses:
: Null command. This command is interpreted, but performs no action.
Korn Shell, ksh, Special Commands
Input/Output redirection is permitted. Unless otherwise indicated, the output is written on file descriptor 1 and the exit status, when
there is no syntax error, is zero.
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
variable assignment. This means that tilde substitution is performed after the = sign and word splitting and file name genera-
tion are not performed.
In addition to these built-in reserved command words, ksh also uses:
* : [ arg ... ] The command only expands parameters.
* .file [ arg ... ] Read the complete file then execute the commands. The commands are executed in the current shell environment.
The search path specified by PATH is used to find the directory containing file. If any arguments arg are
specified, they become the positional parameters. Otherwise, the positional parameters are unchanged. The exit
status is the exit status of the last command executed. the loop termination test.
Korn Shell, ksh93, Special Commands
Input/Output redirection is permitted. Unless otherwise indicated, the output is written on file descriptor 1 and the exit status, when
there is no syntax error, is zero.
Except for :, true, false, echo, newgrp, and login, all built-in commands accept -- to indicate end of options. They also interpret the
option --man as a request to display the manual page onto standard error and -? as a help request which prints a usage message on standard
error.
Commands that are preceded by one or two + 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. They are not valid function names.
5. Words, following a command preceded by ++ that are in the format of a variable assignment, are expanded with the same rules as a
variable assignment. This means that tilde substitution is performed after the = sign and field splitting and file name genera-
tion are not performed.
In addition to these built-in reserved command words, ksh93 also uses:
: [ arg ... ] The command only expands parameters.
.name [ arg ... ] If name is a function defined with the function name reserved word syntax, the function is executed in the cur-
rent environment (as if it had been defined with the name() syntax.) Otherwise if name refers to a file, the
file is read in its entirety and the commands are executed in the current shell environment. The search path
specified by PATH is used to find the directory containing the file. If any arguments arg are specified, they
become the positional parameters while processing the . command and the original positional parameters are
restored upon completion. Otherwise the positional parameters are unchanged. The exit status is the exit status
of the last command executed.
SEE ALSO
Intro(1), alias(1), break(1), builtin(1), cd(1), chmod(1), csh(1), disown(1), echo(1), exec(1), exit(1), find(1), getoptcvt(1), getopts(1),
glob(1), hash(1), history(1), jobs(1), kill(1), ksh(1), ksh93(1), let(1), limit(1), login(1), logout(1), newgrp(1), nice(1), nohup(1),
print(1), printf(1), pwd(1), read(1), readonly(1), set(1), sh(1), shift(1), sleep(1), suspend(1), test(1)test(1), test(1B), time(1),
times(1), trap(1), typeset(1), umask(1), wait(1), chdir(2), chmod(2), creat(2), umask(2), getopt(3C), profile(4), environ(5)
SunOS 5.11 20 Nov 2007 shell_builtins(1)