I am getting a variable as x=2006/01/18
now I have to extract each field from it.
Like x1=2006, x2=01 and x3=18.
Any idea how?
Thanks a lot for help.
Thanks
CSaha (6 Replies)
Dear friends,
I'm a novice Unix user and I'm trying to learn the ropes. I have a big task I have to accomplish and I'm convinced Unix can get the job done, I just haven't figured out how. I recently posted on the topic of cutting text between unique text patterns and somebody helped me a great... (24 Replies)
Hi,
i have a line with several fields (indefinite number of - count varies) separated by colon.
Now, i need to pick each field (except the first one) and have it assigned to variable within a loop. In other words, in the first iteration of the loop, the variable must be assigned with 2nd... (2 Replies)
Greetings,
I would like to extract records from a fixed width text file that have unique field elements.
Data is structured like this:
John A Smith NY
Mary C Jones WA
Adam J Clark PA
Mary Jones WA
Fieldname / start-end position
Firstname 1-10... (8 Replies)
I need some assistance, I am writing a script in bash.
I want to do two things:
1/. I want to replace the LF at the end of the RFH Ø ¸MQSTR ¸ so I can process the file record by record using a while loop.
2/. I want to extract two fields from each record, they are identified with... (1 Reply)
I am need to extract a number of values from a file, put have now clue how to do this.
The file looks like this:
# My file
Dest=87;CompatibleSystemSoftwareVersion=2.5300-;
Dest=87;ImageVersion=000061f3;SystemSoftwareVersion=2.5300;CDN=http://my.backup.com/download.txt;CDN_Timeout=30;
I... (3 Replies)
Hi,
I have multiple files in a directory all I am trying to do is to read the files in the directory and extract data from 2nd field till 10th field and put it in a new files. The files are pipe delimited. The new file will have the same name as the old file but the prefix of PRE_oldfilename.
... (1 Reply)
Hi,
I need to extract last character of the field retrieved from the database using select command.
eg:
select event,text from event_data;
o/p: Event1,text1
But I need to extract only '1' from the fields...similarly '2' from Event2,text2 and '3' from Event3,text3 etc., and need to pass... (6 Replies)
I have one file A.txt which is comma separated and I want to extract first 4 field's in a file and also I want to add one more column in output
A.txt in output for all records. A.txt should not be hard coded since I do not filename it may be any file. (1 Reply)
Hello All,
I have a requirement to split the input.xml file different files and i have tried using earlier examples(where i have posted in the forum), but still no luck
Here is my input.xml
<jms-system-resource>
<name>UMSJMSSystemResource</name>
... (4 Replies)
Discussion started by: Siv51427882
4 Replies
LEARN ABOUT X11R4
wait
wait(1) User Commands wait(1)NAME
wait - await process completion
SYNOPSIS
/bin/sh
wait [pid...]
/bin/jsh /bin/ksh /usr/xpg4/bin/sh
wait [pid...]
wait [ % jobid...]
/bin/csh
wait
DESCRIPTION
The shell itself executes wait, without creating a new process. If you get the error message cannot fork,too many processes, try using the
wait command to clean up your background processes. If this doesn't help, the system process table is probably full or you have too many
active foreground processes. There is a limit to the number of process IDs associated with your login, and to the number the system can
keep track of.
Not all the processes of a pipeline with three or more stages are children of the shell, and thus cannot be waited for.
/bin/sh, /bin/jsh
Wait for your background process whose process ID is pid and report its termination status. If pid is omitted, all your shell's currently
active background processes are waited for and the return code will be 0. The wait utility accepts a job identifier, when Job Control is
enabled (jsh), and the argument, jobid, is preceded by a percent sign (%).
If pid is not an active process ID, the wait utility will return immediately and the return code will be 0.
csh
Wait for your background processes.
ksh
When an asynchronous list is started by the shell, the process ID of the last command in each element of the asynchronous list becomes
known in the current shell execution environment.
If the wait utility is invoked with no operands, it will wait until all process IDs known to the invoking shell have terminated and exit
with an exit status of 0.
If one or more pid or jobid operands are specified that represent known process IDs (or jobids), the wait utility will wait until all of
them have terminated. If one or more pid or jobid operands are specified that represent unknown process IDs (or jobids), wait will treat
them as if they were known process IDs (or jobids) that exited with exit status 127. The exit status returned by the wait utility will be
the exit status of the process requested by the last pid or jobid operand.
The known process IDs are applicable only for invocations of wait in the current shell execution environment.
OPERANDS
The following operands are supported:
One of the following:
pid The unsigned decimal integer process ID of a command, for which the utility is to wait for the termination.
jobid A job control job ID that identifies a background process group to be waited for. The job control job ID notation is applicable
only for invocations of wait in the current shell execution environment, and only on systems supporting the job control option.
USAGE
On most implementations, wait is a shell built-in. If it is called in a subshell or separate utility execution environment, such as one of
the following,
(wait)
nohup wait ...
find . -exec wait ... ;
it will return immediately because there will be no known process IDs to wait for in those environments.
EXAMPLES
Example 1: Using A Script To Identify The Termination Signal
Although the exact value used when a process is terminated by a signal is unspecified, if it is known that a signal terminated a process, a
script can still reliably figure out which signal is using kill, as shown by the following (/bin/ksh and /usr/xpg4/bin/sh):
sleep 1000&
pid=$!
kill -kill $pid
wait $pid
echo $pid was terminated by a SIG$(kill -l $(($?-128))) signal.
Example 2: Returning The Exit Status Of A Process
If the following sequence of commands is run in less than 31 seconds (/bin/ksh and /usr/xpg4/bin/sh):
sleep 257 | sleep 31 &
jobs -l %%
then either of the following commands will return the exit status of the second sleep in the pipeline:
wait <pid of sleep 31>
wait %%
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of wait: LANG, LC_ALL, LC_CTYPE, LC_MES-
SAGES, and NLSPATH.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO csh(1), jobs(1), ksh(1), sh(1), attributes(5), environ(5), standards(5)SunOS 5.10 12 Dec 1997 wait(1)