Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Timed action after fork() in parent process
Top Forums Programming Timed action after fork() in parent process Post 302510851 by JohnGraham on Tuesday 5th of April 2011 06:56:43 AM
Old 04-05-2011
Quote:
Originally Posted by disaster
My intention is to make one program available only over one call within another program.
Ah, sounds like what you're best off doing is creating a new group (e.g. 'proggrp') and making the calling program be owned by proggrp and setgid, and then making the called program owned by proggrp with the executable bit set only for the group. That way the user won't be able to chmod it (unless they own it - best make it owned by root, or use this scheme with a special user and setuid instead) and there will be no "gap" during which they can exploit the program's "executableness".

Edit: Also, by doing it this way you give control over who can run what to the system administrator (where it should be) as opposed to the programmer (who might not anticipate a need for more flexibility somewhere down the line...).
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

how to find the chid process id from given parent process id

how to find the chid process id from given parent process id.... (the chid process doesnot have sub processes inturn) (3 Replies)
Discussion started by: guhas
3 Replies

2. Programming

Problems with child comunicating with parent on fork()

Hello, I'm trying to implement a version of a bucketSort (kinda) server/client, but I'm having a VERY hard time on making the server behave correctly, when talking to the children, after it forks. The server is kinda big (300+ lines), so I won't post it here, but here's what I'm doing. 1)create a... (8 Replies)
Discussion started by: Zarnick
8 Replies

3. UNIX for Advanced & Expert Users

Fork() 1 Parent 3 Children

Hi, as I understand fork(), it makes a copy of the parent which becomes a child. But is there anyway to make three children for that one parent. So in other words, if I look up the getppid() of the children, I want them to have the same value?? Thanks in advance to any help! (1 Reply)
Discussion started by: MS_CC
1 Replies

4. Shell Programming and Scripting

How to make the parent process to wait for the child process

Hi All, I have two ksh script. 1st script calls the 2nd script and the second script calls an 'C' program. I want 1st script to wait until the 'C' program completes. I cant able to get the process id for the 'C' program (child process) to make the 1st script to wait for the second... (7 Replies)
Discussion started by: sennidurai
7 Replies

5. Shell Programming and Scripting

[KSH/Bash] Starting a parent process from a child process?

Hey all, I need to launch a script from within 2 other scripts that can run independently of the two parent scripts... Im having a hard time doing this, if anyone knows how please let me know. More detail. ScriptA (bash), ScriptB (ksh), ScriptC (bash) ScriptA, launches ScriptB ScirptB,... (7 Replies)
Discussion started by: trey85stang
7 Replies

6. Programming

parent called more times - fork - C language

Hi gurus can you explain following lines of code ? #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <unistd.h> #include <sys/types.h> #include <sys/wait.h> int main(void) { pid_t pid; int rv; switch(pid = fork()) { case -1: ... (7 Replies)
Discussion started by: wakatana
7 Replies

7. Programming

fork(), parent and child processes???

Hi friends, I have a small question regarding unix system call fork, I hope you will solve my problem. Here is the small program $ cat fork1.c #include <stdio.h> #include <unistd.h> #include <sys/types.h> int main() { int pid; int x = 0; x = x + 1; pid = fork(); if(pid < 0) {... (2 Replies)
Discussion started by: gabam
2 Replies

8. Shell Programming and Scripting

forking a child process and kill its parent to show that child process has init() as its parent

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

9. UNIX for Dummies Questions & Answers

Timed loop to scan for a process

Hi all, Looking for some help, I have written a very simple script to pass to PowerHA to act as an indicator to activate failover required. Where i get completely lost is I have to create a wait and carry out the grep for the process once every 10 seconds this works but need to embed this... (1 Reply)
Discussion started by: Gary Hay
1 Replies

10. UNIX for Beginners Questions & Answers

One parent, multiple children pipe with fork()

The task I have to do is something along the lines "I receive some input and based on the first character I send it through pipe to one of the children to print". The scheme it is based on is 1->2; 1->3; 1->4; 2 will print all the input that starts with a letter, 3 will print all the input that... (2 Replies)
Discussion started by: Ildiko
2 Replies

LEARN ABOUT OPENSOLARIS

run

run(1F) 							   FMLI Commands							   run(1F)

NAME

       run - run an executable

SYNOPSIS

       run [-s] [-e] [-n] [-t string] program

DESCRIPTION

       The run command runs program, using the PATH variable to find it. By default, when program has completed, the user is prompted (Press ENTER
       to continue:), before being returned to FMLI. The argument program is a system executable followed by its options (if any).

OPTIONS

       The following options are supported:

       -e	   If -e is specified, the user is prompted before returning to FMLI only if there is an error condition

       -n	   If -n is specified, the user is never prompted before returning to FMLI (useful for programs like vi, in which the user must do
		   some specific action to exit in the first place).

       -s	   The	-s option means "silent", implying that the screen does not have to be repainted when program has completed. The -s option
		   should only be used when program does not write to the terminal. In addition, when -s is used, program cannot  be  interrupted,
		   even if it recognizes interrupts.

       -tstring    If -t is specified, string is the name this process has in the pop-up menu generated by the frm-list command.

EXAMPLES

       Example 1 Sample Output of the run Command

       Here is a menu that uses run:

	 menu="Edit special System files"
	 name="Password file"
	 action=`run -e vi /etc/passwd`
	 name="Group file"
	 action=`run -e vi /etc/group`
	 name="My .profile"
	 action=`run -n vi $HOME/.profile`

ATTRIBUTES

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

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

SEE ALSO

       attributes(5)

SunOS 5.11							    7 Nov 2005								   run(1F)
All times are GMT -4. The time now is 02:16 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy