Sponsored Content
Full Discussion: UNIX programming problems
Top Forums UNIX for Dummies Questions & Answers UNIX programming problems Post 1295 by Adam on Thursday 22nd of February 2001 12:25:45 PM
Old 02-22-2001
Question

Hi im a student,
1st time using unix, currently were writing programs using fork() and identifying differences between the parent child processes. Im finding getpid(), getppid(), retVal confusing and we are moving on to grps now any
sites or information you can supply me to make this alittle clearer would be greatly appreciated.
 

9 More Discussions You Might Find Interesting

1. IP Networking

TCP Programming problems with 'recv'

Hey, I am learning to program a TCP server and managed to get it up and running (I am using Windows 98SE). I can use the send function to send information to the client and I can use the recv function to ask the user to pass information through, but when I do so it only allows the client to... (1 Reply)
Discussion started by: KrazyGuyPaul
1 Replies

2. Programming

c programming or unix programming!?

i would like advice on the usbject of c programming (in the middle of reading a book on C). could i benefit more if i apply that knowledge in the unix format if i were able to, or would that take the point out of learning C, basically I want to stay away from strying too far away from unix and use... (1 Reply)
Discussion started by: moxxx68
1 Replies

3. UNIX for Dummies Questions & Answers

new to unix programming

hi guys, I m from india. I m working as programmer in one of MNC. Since 3 years im working on Microsoft platform on dot net and platforms. but now i decided to shift my future to unix , Linux side. I want to be the part of this open source family. and with this i want to make my future also.... (6 Replies)
Discussion started by: d_swapneel14
6 Replies

4. Shell Programming and Scripting

Unix Systems Programming Vs Unix Programming

Several months ago I found a link that explained the difference between how a Unix Systems Admin would do scripting compared to what a Unix Programmer would do. It showed a basic script and then show several iterations that explained how the Systems Admin would change it to make it better. I was... (0 Replies)
Discussion started by: BCarlson
0 Replies

5. UNIX for Dummies Questions & Answers

Carreer:Networking Programming in Unix (C programming Language)

Hello, I am trying to learn Networking Programming in C in unix enviorment. I want to know how good it is to become a network programmer. i am crazy about Network programming but i also want to opt for the best carreer options. Anybody experienced Network Programmer, please tell me is my... (5 Replies)
Discussion started by: vibhory2j
5 Replies

6. Programming

Please help! accept function problems in Socket programming

Hi, I have a client-server socket program. It has been working fine for over a year, but recently it started to show strange behavior.:confused: After the server program runs for a while, it will show in the top command saying it is using lots of CPU, MEM. I assume it means the server code is... (1 Reply)
Discussion started by: natxie
1 Replies

7. Shell Programming and Scripting

Unix programming help

hey guys im trying to create a batch file that makes directories i have this code atm #!/bin/sh echo "Please enter file name:" read Filename echo "enter number of files to be created " read created for (( i = 1; i < &created; 1++ )) do mkdir $Filename$i done assume i enter... (7 Replies)
Discussion started by: josh111
7 Replies

8. UNIX for Dummies Questions & Answers

How does unix system administration, unix programming, unix network programming differ?

How does unix system administration, unix programming, unix network programming differ? Please help. (0 Replies)
Discussion started by: thulasidharan2k
0 Replies

9. Programming

Looping problems socket programming in C

Sorry if I posted 2 separate questions. I'm currently doing socket programming on my current task. As you can see below in the client side. I've tried to do a loop so I will be able to get prompt for input over and over again. This is the code. do{ printf("Please your name > ");... (10 Replies)
Discussion started by: aLHaNz
10 Replies
getpid(2)							   System Calls 							 getpid(2)

NAME
getpid, getpgrp, getppid, getpgid - get process, process group, and parent process IDs SYNOPSIS
#include <unistd.h> pid_t getpid(void); pid_t getpgrp(void); pid_t getppid(void); pid_t getpgid(pid_t pid); DESCRIPTION
The getpid() function returns the process ID of the calling process. The getpgrp() function returns the process group ID of the calling process. The getppid() function returns the parent process ID of the calling process. The getpgid() function returns the process group ID of the process whose process ID is equal to pid, or the process group ID of the calling process, if pid is equal to 0. RETURN VALUES
The getpid(), getpgrp(), and getppid() functions are always successful and no return value is reserved to indicate an error. Upon successful completion, getpgid() returns the process group ID. Otherwise, getpgid() returns (pid_t)-1 and sets errno to indicate the error. ERRORS
The getpgid() function will fail if: EPERM The process whose process ID is equal to pid is not in the same session as the calling process, and the implementation does not allow access to the process group ID of that process from the calling process. ESRCH There is no process with a process ID equal to pid. The getpgid() function may fail if: EINVAL The value of the pid argument is invalid. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ |Standard |See standards(5). | +-----------------------------+-----------------------------+ SEE ALSO
Intro(2), exec(2), fork(2), getsid(2), setpgid(2), setpgrp(2), setsid(2), signal(3C), attributes(5), standards(5) SunOS 5.11 27 Jan 2009 getpid(2)
All times are GMT -4. The time now is 12:48 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy