Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Controlling a child's stdin/stdout (not working with scp)
Top Forums Programming Controlling a child's stdin/stdout (not working with scp) Post 302403141 by DreamWarrior on Thursday 11th of March 2010 03:24:52 PM
Old 03-11-2010
Corona: There are 50+ hosts that this script needs to transfer files to/from. Each host has a different user/password. That user is the only one with access to the files I need to remote copy (besides root, of course). Can shared keys help here? The way I understand it, shared keys allow one user access to several hosts. They are tied to the user id. That won't help if this is true.

Jim: ftp/rcp are blocked, they aren't secure. Of course, neither is a password dictionary; but if you knew our password policy (and read above about the number of accounts all with disparite passwords), you'd realize everyone keeps them anyway. So...our security policy is so secure that it's insecure, lol. I'd just be making life easier if I could make this work.
 

10 More Discussions You Might Find Interesting

1. Programming

Controlling child processes

Hello all, I am trying to create n child processes and control them from a parent process; say make child 3 print its pid and then child 5 do the same and some other stuff. Is there a way to accomplishing this after all the child processes are created via a call to fork(). Thank you, FG (23 Replies)
Discussion started by: forumGuy
23 Replies

2. Programming

C++ How to use pipe() & fork() with stdin and stdout to another program

Hi, Program A: uses pipe() I am able to read the stdout of PROGAM B (stdout got through system() command) into PROGRAM A using: * child -> dup2(fd, STDOUT_FILENO); -> execl("/path/PROGRAM B", "PROGRAM B", NULL); * parent -> char line; -> read(fd, line, 100); Question:... (2 Replies)
Discussion started by: vvaidyan
2 Replies

3. Programming

stdout/stdin + flushing buffers

Hi all I've run into a snag in a program of mine where part of what I entered in at the start of run-time, instead of the current value within printf() is being printed out. After failing with fflush() and setbuf(), I tried the following approach void BufferFlusher() { int in=0;... (9 Replies)
Discussion started by: JamesGoh
9 Replies

4. UNIX for Dummies Questions & Answers

Redirect stdin stdout to multiple files

Hi, i know how to a) redirect stdout and stderr to one file, b) and write to two files concurrently with same output using tee command Now, i want to do both the above together. I have a script and it should write both stdout and stderr in one file and also write the same content to... (8 Replies)
Discussion started by: ysrini
8 Replies

5. Shell Programming and Scripting

can't close stdin/stdout in shell

#!/bin/sh exec 0</dev/null exec 1>/dev/null ls -l /proc/self/fd >&2 produces total 0 lr-x------ 1 tyler users 64 Feb 18 10:38 0 -> /proc/7886/fd lrwx------ 1 tyler users 64 Feb 18 10:38 1 -> /dev/pts/4 lrwx------ 1 tyler users 64 Feb 18 10:38 2 -> /dev/pts/4 I've verified the shell is... (10 Replies)
Discussion started by: Corona688
10 Replies

6. Shell Programming and Scripting

Redirecting stdin/stdout to/from command from/to string

Hi, I am working on a project where I have to generate and execute nasm code on-the-fly. I generate the code in a file program.asm and then execute it.This output is to stdout which i redirect to an output file which i read back to compare results: system("nasm -f elf program.asm >... (5 Replies)
Discussion started by: doc_cypher
5 Replies

7. Programming

read and write stdin/stdout in unix

Hi, i am using the below program to read from the standard input or to write to standard out put. i know that using highlevel functions this can be done better than what i have done here. i just want to know is there any other method by which i find the exact number of characters ( this... (3 Replies)
Discussion started by: MrUser
3 Replies

8. UNIX for Dummies Questions & Answers

STDIN and STDOUT

Hallo, i have a script like: if ;then echo "OK" else echo "ERROR $2 is missing" fi; if ;then touch $2 fi; if ;then cat $1 | grep xy > $2 (1 Reply)
Discussion started by: eightball
1 Replies

9. Shell Programming and Scripting

Controlling the Number of Child processes

I am trying to implement the below using Ksh script on a Lx machine. There is a file(input_file) with 100K records. For each of these records, certain script(process_rec) needs to be called with the record as input. Sequential processing is time-consuming and parallel processing would eat up... (2 Replies)
Discussion started by: APT_3009
2 Replies

10. Shell Programming and Scripting

[stdin / stdout] Strategies for redirecting outputs

Well.. let's say i need to write a pretty simple script. In my script i have 2 variables which can have value of 0 or 1. $VERBOSE $LOG I need to implement these cases: ($VERBOSE = 0 && $LOG = 0) => ONLY ERROR output (STDERR to console && STDOUT to /dev/null) ($VERBOSE = 1... (5 Replies)
Discussion started by: Marmz
5 Replies

LEARN ABOUT DEBIAN

dpipe

DPIPE(1)						      General Commands Manual							  DPIPE(1)

NAME

       dpipe - bi-directional pipe command

SYNOPSIS

       dpipe [ command [ args ] ] = [ command [ args ] ]
       dpipe [ command [ args ] ] = [ command [ args ] ] [ = [ command [ args ] ] ] ...

DESCRIPTION

       dpipe  is  a  general tool to run two commands diverting the standard output of the first command into the standard input of the second and
       vice-versa.  It is the bi-directional extension of the | (pipe) syntax used by all the shells.  The = has been chosen as a metaphor of  two
       parallel  communication	lines  between	the commands.  It is also possible to concatenate several tools. Intermediate programs communicate
       using standard input and standard output with the preceding tool and alternate standard input and  output  (respectively  file  descriptors
       number  3  and  4) towards the following tool.  If an intermediate tool should process only the data flowing in one direction use { or } as
       suffix for the preceding = and prefix of the following one.
       This tool has been written as a tool for the Virtual Distributed Ethernet.

EXAMPLE

       dpipe a = b
       processes a and b are bidirectionally connected: stdin of a is connected to stdout of b and vice-versa
       dpipe a = b = c
       a and b are connected as above. Alternate stdin of b is connected to stdout of c and alternate stdout of b to stdin of c
       dpipe a =} b }= c
       This is a cycle of pipes: stdout of a is connected to stdin of b, stdout of b with stdin of c, and stdout of c to stdin of a
       dpipe a =} b }={ c {= d = e
       all the notations can be mixed together.  this is a -> b -> d -> c and back to a; alternate ports of d are connected to e

OPTIONS

       no options.

NOTICE

       Virtual Distributed Ethernet is not related in any way with www.vde.com ("Verband der Elektrotechnik, Elektronik  und  Informationstechnik"
       i.e. the German "Association for Electrical, Electronic & Information Technologies").

SEE ALSO

       vde_switch(1), vde_plug(1), vde_plug2tap(1), vdeq(1).  wirefilter(1).

AUTHOR

       VDE is a project by Renzo Davoli <renzo@cs.unibo.it>.

Virtual Distributed Ethernet					 December 6, 2006							  DPIPE(1)
All times are GMT -4. The time now is 10:12 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy