Beginners question about fork Post: 302373231

10 More Discussions You Might Find Interesting

1. Programming

simple fork question

When executing this simple program: #include <unistd.h> void main() { int f; printf("\n Parent procces ID=%d\n",getpid()); f=fork(); if(f==0) { printf("\n Child process ID=%d father=%d\n",getpid(),getppid()); } ...

2. Shell Programming and Scripting

awk - Beginners Question

I have my inputfile in the following format : From:sdhfhg dsfhsdjfjdsfh dsfjdjshjsd djfhsdjfjsdhjds Error Description <aa.aa.aa.aa.aa.aa> From:ksljfsdhfjh djfdsjkf sdjwoquk dsfsdfj Error Description <dd.dd.dd.dd.dd> I want to read the lines from tag 'From:' thrul <aa.aa.aa.aa.aa.aa>...

3. Programming

A small question about fork()

Hello experts, I am using fork() in my code but I am confused which output comes first child or parent? I did the following code .My book shows parent first but my linux shows child first.Can anyone tell me why? #include <stdio.h> int main(){ int pid; printf("I am original process with pid...

4. Programming

Question About Multi-Processed Applications... fork()

Assume we have an application built on *nix that uses fork()...then the processes procedure is going to act as follow: X is considered a parent process (first click on application) Y is considered a child process of X (second click on application) Z is considered a child process of Y (third...

5. Shell Programming and Scripting

awk beginners question

hi, i start using awk and have a very basic problem. here's my code: #! /usr/bin/awk -f # 2010, scz # { $1 == "test" { print $2 } } this works on the command line but not as "program" - what is the difference between awk programs on the command line and executing awk...

6. Programming

multiple fork() question

I writing a program that forks three times but only on the parent process. The three children processes then produces output in order. 1, 2, 3. I am confused on how to do this. I have tried multiple if and else if statements but the output does not come out right. How should I go about doing this?

7. Programming

Newbie question on exec,fork, wait,pipe C

Hello everybody.I want to make clear that i am not going to ask from anybody to build my asignement but i have a big problem. I can't seem to find anywhere ONE good example on C about what i am trying to do:wall:.I think it is simple. All i ask is one example, even a link is fine. So, i want to...

8. Programming

question about fork

i'm experimenting fork function and i found this code #include <stdio.h> #include <sys/stat.h> #include <sys/types.h> #include <wait.h> #include <fcntl.h> #include <unistd.h> int main(void) { int fd; pid_t p; p = fork(); fork(); if (p>0) { fork();} fork(); fork();...

9. Programming

Linux fork, execv, wait question

Hi All, I have a program for class that needs to do the following: 1. Print the directory entries from the current directory using ncurses 2. Provide a prompt next to each directory entry and allow the user to enter commands that may or may not be about the file 3. Execute those commands in...

10. UNIX for Beginners Questions & Answers

Question about global environment variables & fork() exec()

Hello... And thanks in advance for any help anyone can offer me on my question! I've been doing a lot of reading to try and find my answer... But I haven't had any luck What I'm trying to understand is where a child process inherits global environment variables from? I understand the exec()...

LEARN ABOUT MOJAVE

dlclose

DLCLOSE(3)						   BSD Library Functions Manual 						DLCLOSE(3)

NAME

     dlclose -- close a dynamic library or bundle

SYNOPSIS

     #include <dlfcn.h>

     int
     dlclose(void* handle);

DESCRIPTION

     dlclose() releases a reference to the dynamic library or bundle referenced by handle.  If the reference count drops to 0, the bundle is
     removed from the address space, and handle is rendered invalid.  Just before removing a dynamic library or bundle in this way, any termina-
     tion routines in it are called.  handle is the value returned by a previous call to dlopen.

     Prior to Mac OS X 10.5, only bundles could be unloaded.  Starting in Mac OS X 10.5, dynamic libraries may also be unloaded.  There are a cou-
     ple of cases in which a dynamic library will never be unloaded: 1) the main executable links against it, 2) An API that does not supoort
     unloading (e.g. NSAddImage()) was used to load it or some other dynnamic library that depends on it, 3) the dynamic library is in dyld's
     shared cache.

RETURN VALUES

     If dlclose() is successful, it returns a value of 0.  Otherwise it returns -1, and sets an error string that can be retrived with dlerror().

SEE ALSO

     dlopen(3) dlsym(3) dlerror(3) dyld(3) ld(1) cc(1)

								    Nov 6, 2006

10 More Discussions You Might Find Interesting

1. Programming

simple fork question

Discussion started by: bb666

2. Shell Programming and Scripting

awk - Beginners Question

Discussion started by: Amruta Pitkar

3. Programming

A small question about fork()

Discussion started by: mlhazan

4. Programming

Question About Multi-Processed Applications... fork()

Discussion started by: f.ben.isaac