Making a system call Post: 302078949

Sponsored Content

Top Forums Programming Making a system call Post 302078949 by hardwickj on Wednesday 5th of July 2006 05:47:02 PM

07-05-2006

Registered User

Making a system call

This is a total nooby question, but here goes...

I am trying to do something in C for the very first time, and doing it in Solaris, for the very first time. It would otherwise be easy enough to test out and find out, but I wont be able to do so until the week after next for various reasons, so I was just wondering if this would work...

I am replacing a script file with C code. The script starts out such as:

#!/bin/ksh
export BUILD_DIR=`cat /nssn/cm/current_build`
export HOSTNAME=`hostname`
echo ColdStart>$BUILD_DIR/logs/StartType
etc...

so, can I just replace that with system calls such as:

system("#!/bin/ksh");
system("export BUILD_DIR=`cat /nssn/cm/current_build`");
system("export HOSTNAME=`hostname`");
etc...

At first I thought yes but then I wondered, does each system call sort of call in a different shell? If so, would the environment variable defined in one system call be seen from another system call?

If that is a problem, is there any way to do all of the system calls in a single system call?

Help a noob out...and thanks for any help in advance!!!

hardwickj

View Public Profile for hardwickj

Find all posts by hardwickj

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Making a SOAP call from within unix shell scripts

Hi guys, Is it possible to make SOAP calls from within Unix shell scripts? I need to access a web service from within UNIX in order to lookup something while I am doing some parsing on a file. Regards, Laud

2. Linux

Making Socket System Call From Linux Kernel Module?

Hi Everyone! How can we make a socket() system call from a linux module executing in kernel space? If any one knows, kindly tell me. It will be great. I want to use the socket interface in linux kernel space for sending raw packets over the network. Hamayun

3. UNIX for Advanced & Expert Users

how to differentiate system call from library call

Hi, Ho do I differentiate system call from library call? for example if I am using chmod , how do I find out if it is a system call or library call? Thanks Muru

4. Programming

c system call

How the c compiler differentiates the system calls and function calls?

5. Shell Programming and Scripting

system call

Hi, How to write a system calls in a script ? > cd $HOME > ls -ltr thanks in advance..

6. Programming

C:system call

Hi I'm studing the system call. I've written a small program that return the time spent in doing some operations. Now I'd like to write one that return the time spent in user mode of a process. I'm reading that i should use the tms struct: clock_t times(struct tms *buf); struct tms {...

7. UNIX for Dummies Questions & Answers

Making tar of a remote file system

Hello, I was asked by my boss to make a backup of one of our systems that is slated to be decommissioned. When I suggested if could tar the "/" directory he nodded and said that would do the trick, When I try and execute the command I get EOF error. I think it is because there is not enough...

8. Shell Programming and Scripting

system call

Trying to figure out a load issue with a webserver. I have traced a php script and noticed the following connect(4, {sa_family=AF_INET, sin_port=htons(3306), sin_addr=inet_addr("XX.XX.XX.XX")}, 16) = -1 EINPROGRESS (Operation now in progress) <0.000035> poll(, 1, 2000) = 1 () <0.000120>...

9. Solaris

Making HDD backup in sun Solaris system

Hello to all, I have Fujitsu Celzius M470 workstation which has Sun solaris system installed and want to make a complete backup of the hard drive. The existing HDD is SATA II, 500 GB. I don't have much experience working with SUN solaris systems (not at all) but have some experience with...

LEARN ABOUT PHP

times

times(1)                                                           User Commands                                                          times(1)

NAME

       times - shell built-in function to report time usages of the current shell

SYNOPSIS

   sh
       times

   ksh
       times

DESCRIPTION

   sh
       Print the accumulated user and system times for processes run from the shell.

   ksh
       Print the accumulated user and system times for the shell and for processes run from the shell.

       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.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), sh(1), time(1), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                           times(1)

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Making a SOAP call from within unix shell scripts

Discussion started by: Laud12345

2. Linux

Making Socket System Call From Linux Kernel Module?

Discussion started by: mian_m_hamayun

3. UNIX for Advanced & Expert Users

how to differentiate system call from library call

Discussion started by: muru

4. Programming

c system call

Discussion started by: rangaswamy

5. Shell Programming and Scripting

system call

Discussion started by: hegdeshashi

6. Programming

C:system call

Discussion started by: Dedalus

7. UNIX for Dummies Questions & Answers

Making tar of a remote file system

Discussion started by: mojoman

8. Shell Programming and Scripting

system call

Discussion started by: rajan007

9. Solaris

Making HDD backup in sun Solaris system

Discussion started by: Mick

LEARN ABOUT PHP

times