10 More Discussions You Might Find Interesting
1. Programming
I have an input file with contents like:
5785690|68690|898809
7960789|89709|789789
7669900|87865|659708
7869098|65769|347658
so on..
I need to pass this file to 10 parallely running processes (forking)so that each line is processed by a process and no line is processed twice and write the... (1 Reply)
Discussion started by: rkrish
1 Replies
2. Shell Programming and Scripting
Hi everyone
i am very new to linux , working on bash shell.
I am trying to solve the given problem
1. Create a process and then create children using fork
2. Check the Status of the application for successful running.
3. Kill all the process(threads) except parent and first child... (2 Replies)
Discussion started by: vizz_k
2 Replies
3. Shell Programming and Scripting
Hi guys. Hopefully this question will make sense!
Continuing on my script to automatically copy some huge files across the network onto various servers as background jobs, I need to be able to check that each job has finished successfully.
The script below shows what I want - almost. The... (2 Replies)
Discussion started by: dlam
2 Replies
4. Shell Programming and Scripting
I have a bash script that has been used for months here at work for doing an SSH into other machines both Linux and Solaris and running a script on the remote machine. Recently I have started to noticed that things are being left being on the maching doing the SSH.
For example....
tivoli ... (1 Reply)
Discussion started by: LRoberts
1 Replies
5. Shell Programming and Scripting
Hi,
We are doing migration from DB2 to Teradata.
There are couple of things involving in the project.
Please see below following order
Autosys-Jil script
Profile script
Category1
Teradata script
Data stage job script
Tera data script
Export files script..
Like that we have 10000... (1 Reply)
Discussion started by: onesuri
1 Replies
6. UNIX for Advanced & Expert Users
hi,
I want my program to fork a new process and then I want to kill the parent process. The parent program before dying will issue a SIGTERM to all its childs. Which eventually kills all Children.
I cant handle the SIGTERM at the child level.:(
What I was thinking of was the Parent... (3 Replies)
Discussion started by: tyler_durden
3 Replies
7. UNIX for Advanced & Expert Users
hi,
I thought that when a child shell is forked, it will inherit all the variables of the parent
now in my .cshrc I have
setenv X x
then I do at command line
setenv X y
and X is now y. So far so good!
I then have a very simple script, y.csh
#!/usr/bin/csh
echo X (7 Replies)
Discussion started by: JamesByars
7 Replies
8. Programming
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
int main()
{
pid_t pID;
int i;
for (i = 0; i < 3; i++)
{
pID = fork ();
if (pID == 0)
{
printf ("Value of i --> %d... (2 Replies)
Discussion started by: kymthasneem
2 Replies
9. Programming
Hi
I'm currently working with C on UNIX (HPUX) and need to be able to fork a seperate Java process from within a running C process.
I can run the following code from the command line via a script but am having difficulty getting it to work from within the code.
I am trying to use execl. Is... (4 Replies)
Discussion started by: themezzaman
4 Replies
10. UNIX for Advanced & Expert Users
When I compile this C programme I get different outputs each time I run it
Please explain to me whats happening in the code if you can give me a detailed explanation with the schedular functionality it will help a lot. Because I am stuck with this.
#include <stdio.h>
main(){... (3 Replies)
Discussion started by: manjuWicky
3 Replies
newgrp(1) General Commands Manual newgrp(1)
NAME
newgrp - Changes primary group identification of a shell process
SYNOPSIS
newgrp [-l] [group]
Obsolete Synopsis
newgrp [-] [group]
Note
The C shell has a built-in version of the newgrp command. If you are using the C shell, and want to guarantee that you are using the com-
mand described here, you must specify the full path /usr/bin/newgrp. See the csh(1) reference page for a description of the built-in com-
mand.
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
newgrp: XCU5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
OPTIONS
Changes the login environment to what would be expected if the user logged in again. Changes the login environment to what would be
expected if the user logged in again. (Obsolescent)
OPERANDS
A group name from the group database or a non-negative numeric group ID. Specifies the group ID to which the real and effective group IDs
will be set. If group is a non-negative numeric string and exists in the group database as a group name, the numeric group ID associated
with that group name will be used as the group ID.
DESCRIPTION
The newgrp command changes the primary group identification of the current shell process to group. You remain logged in and the current
directory is unchanged, but calculations of access permissions to files are performed with respect to the primary group ID.
If you do not specify group, newgrp changes the group identification back to that specified for the current user in the /etc/passwd file.
Only exported environment variables retain their values after you invoke newgrp. Otherwise, variables with a default value are reset to
that default.
If a password is required for the specified group, and you are not listed as a member of that group in the group database, you are prompted
to enter the correct password for that group. If you are listed as a member of that group, no password is requested. If no password is
required for the specified group, only users listed as members of that group can change to that group.
[Tru64 UNIX] Only a user with superuser authority can change the primary group of the shell process to one to which that user does not
belong.
[Tru64 UNIX] When you invoke the newgrp command from a shell, the shell executes the command without forking a new process. Therefore, the
shell you were using when you issued the newgrp command is unavailable after the newgrp command finishes.
NOTES
[Tru64 UNIX] The newgrp command is also a built-in command for csh. There is no convenient way to enter a password into the group data-
base. Use of group passwords is not encouraged because by their very nature they encourage poor security practices.
EXIT STATUS
If newgrp succeeds in creating a new shell execution environment, whether or not the group identification was changed successfully, the
exit status will be the exit status of the shell. Otherwise, a non-zero exit value is returned.
The exit status of newgrp is generally inapplicable.
ENVIRONMENT VARIABLES
The following environment variables affect the execution of newgrp: Provides a default value for the internationalization variables that
are unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization
variables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string
value, overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of
bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale for the
format and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of
LC_MESSAGES.
FILES
Group names declared on the system Password file
SEE ALSO
Commands: csh(1), groups(1), id(1), login(1), Bourne shell sh(1b), POSIX shell sh(1p)
Files: group(4), passwd(4)
Standards: standards(5)
newgrp(1)