Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: stdout/stdin + flushing buffers
Top Forums Programming stdout/stdin + flushing buffers Post 302240310 by shamrock on Thursday 25th of September 2008 11:41:19 AM
Old 09-25-2008
Requirements unclear
First off I'm not sure what you're trying to do here but to reinforce what has already been stated by spirtle the code needs to be rectified.
There's no need to cast the int read from standard input to char so the char c; c = (char) in; and c = NULL; statements are unneccessary as this one suffices.
Code:
int in;

The terminal condition for the while loop should check for EOF instead of NULL
Code:
while((in = getchar()) != EOF)

and fputc() writes to stdout NOT stdin
Code:
fputc(in, stdout);

 

10 More Discussions You Might Find Interesting

1. 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

2. Shell Programming and Scripting

Wrapper script for image deployment - stdin/stdout - named pipes and the like

Hi everyone, first post here. Anyone who isn't interested in the background, press pagedown :). I sometimes need to make scripts for little things I need in the infrastructure at the company I work at. Currently I am trying to make a wrapper script for a proprietary image-deployment program.... (2 Replies)
Discussion started by: andreas.ericson
2 Replies

3. 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

4. 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

5. 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

6. Programming

Controlling a child's stdin/stdout (not working with scp)

All, Ok...so I know I *should* be able to control a process's stdin and stdout from the parent by creating pipes and then dup'ing them in the child. And, this works with all "normal" programs that I've tried. Unfortunately, I want to intercept the stdin/out of the scp application and it seems... (9 Replies)
Discussion started by: DreamWarrior
9 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. UNIX for Advanced & Expert Users

How to set font color for STDIN,STDOUT and STDERR?

I want to differentiate the STDOUT and STDERR messages in my terminal . If a script or command is printing a message in terminal I want to differentiate by colors, Is it possible ? Example: $date Wed Jul 27 12:36:50 IST 2011 $datee bash: datee: command not found $alias ls alias... (2 Replies)
Discussion started by: ungalnanban
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 MOJAVE

vconsole.conf

VCONSOLE.CONF(5)                                                   vconsole.conf                                                  VCONSOLE.CONF(5)

NAME

       vconsole.conf - configuration file for the virtual console

SYNOPSIS

       /etc/vconsole.conf

DESCRIPTION

       The /etc/vconsole.conf file configures the virtual console, i.e. keyboard mapping and console font.

       The basic file format of the vconsole.conf is a newline-separated list environment-like shell-compatible variable assignments. It is
       possible to source the configuration from shell scripts, however, beyond mere variable assignments no shell features are supported,
       allowing applications to read the file without implementing a shell compatible execution engine.

       Note that the kernel command line options vconsole.keymap=, vconsole.keymap.toggle=, vconsole.font=, vconsole.font.map=,
       vconsole.font.unimap= may be used to override the console settings at boot.

       Depending on the operating system other configuration files might be checked for configuration of the virtual console as well, however only
       as fallback.

OPTIONS

       The following options are understood:

       KEYMAP=, KEYMAP_TOGGLE=
           Configures the key mapping table of for they keyboard.  KEYMAP= defaults to us if not set. The KEYMAP_TOGGLE= can be used to configured
           a second toggle keymap and is by default unset.

       FONT=, FONT_MAP=, FONT_UNIMAP=
           Configures the console font, the console map and the unicode font map.  FONT= defaults to latarcyrheb-sun16.

EXAMPLE

       Example 1. German keyboard and console

       /etc/vconsole.conf:

           KEYMAP=de-latin1
           FONT=latarcyrheb-sun16

SEE ALSO

       systemd(1), loadkeys(1), setfont(8), locale.conf(5)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
           Developer

systemd                                                             10/07/2013                                                    VCONSOLE.CONF(5)
All times are GMT -4. The time now is 08:37 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy