Third of all, unless your computer has 1000 cores, no point in running 1000 processes simultaneously, they will just go slower. You ought to wait after doing a certain number. Not all shells have facilities to wait for a particular process, the following script requires bash or newer ksh.
Code:
#!/bin/bash
# Save for later since set -- overwrites these
A=$1
B=$2
C=$3
D=$4
E=$5
set --
while read i
do
sipp $B -i $A -m 1 -l 1 -s msml -sf msml/$i/$i.xml --trace_logs -timeout $C &
# Use $1 $2 ... as a list of PIDs. The latest PID gets put on the end.
set -- $* $!
# If we have more than 3 processes going, wait for the oldest one.
if [ "$#" -gt 3 ]
then
wait $1
shift
fi
done < inputfile
wait
Last of all, if these processes are disk-intensive, running them in parallel may not make them faster anyway.
Hi....can you guys help me out in this script??
Below is a portion text file and it contains these:
GEF001 000093625 MKL002510 000001 000000 000000 000000 000000 000000 000001
GEF001 000093625 MKL003604 000001 000000 000000 000000 000000 000000 000001
GEF001 000093625 MKL005675 000001... (1 Reply)
hi all,
I have this file with some user data.
example:
$cat myfile.txt
FName|LName|Gender|Company|Branch|Bday|Salary|Age
aaaa|bbbb|male|cccc|dddd|19900814|15000|20|
eeee|asdg|male|gggg|ksgu|19911216|||
aara|bdbm|male|kkkk|acke|19931018||23|
asad|kfjg|male|kkkc|gkgg|19921213|14000|24|... (4 Replies)
I am having one text file and i need to read that data from my shell script.
I will expain you the scenario:
Script look like:
For name type 1:
For age type 2:
For Salary type3:
echo "Enter the input:"
read the data
if input is 1 then go to the Text file and print the... (2 Replies)
The scope of the shell/perl script is to read the input text file. Validate the expiry date of each certificate and send the mail to the user. The user takes action to add the new certificate to the storage file and user owns the responsibility to update the input text file with the new certificate... (5 Replies)
Hi ,
I am trying to write an shell, which reads a text file (from a location) having a list of numbers of strictly 5 digits only ex: 33144
Now my script will check :
1) that each entry is only 5 digits & numeric only, no alphabets, & its not empty.
2)then it executes a shell script called... (8 Replies)
Have to read one file say sourcefile containing several words and having another folder containing several files.
Now read the first word of Sourcefile & search it into the folder consisting sevral files, and create another file with result. We hhave to pick the filename of the file in which... (3 Replies)
I have a script that sorts and processes unsorted files to newly created directories.
Its working great, but I am trying to understand the leanest method to get the script to create an additional file within each newly created directory that:
Contains a list of all files in the directory... (4 Replies)
i have a text file as belows, it includes 2 columns, 1st is the column name, 2nd is the file_name
data_file.txt
column_name file_name
col1 file1
col2 file2
col3 file1
col4 file1
col5 file2
now, i would like to... (4 Replies)
Is it possible to create new folder and write a new text file in the folder while the current position is outside the new folder? in one line
mkdir folder | echo "hello test"> folder/test.txt
not work. (1 Reply)
Discussion started by: cmdcmd
1 Replies
LEARN ABOUT SUNOS
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)