Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Changing stdin from file redirection to console input
Top Forums Programming Changing stdin from file redirection to console input Post 7670 by nauman on Saturday 29th of September 2001 07:52:19 AM
Old 09-29-2001
Question
I am not opening any file in my program. The file is being redirected to stdin by the OS.

bin &lt inputfile

I am using gets() to read, which not to mention read from the stdin. After I am finished reading the file, I want gets() to continue reading from console input.

Are u implying that file redirection causes a fd attached to stdin. If so when I reopen the fd, what argument should I give it, to attach it to console input.

I am going to try it next anyway and see what happens.

Thanx

Nauman
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

redirection stdin

hello all, I need to create a password change utility for a database. I need to gather at the command line the username, password and database sid. I have the program currently doing this. What I would like to do is not have the new password appear on the screen when I do my read command.... (2 Replies)
Discussion started by: whited05
2 Replies

2. Cybersecurity

changing /cn@0:console file permissions

I'm doing a security sweep of a Sun Sol 5.8 system. The file: /dev/console, which links to /devices/pseudo/cn@0:console, has the following perms: crw--w--w- I would like to get rid of the world write permissions. I can change the file permissions, but as soon as log back in, they are changed... (4 Replies)
Discussion started by: ErnieG
4 Replies

3. UNIX for Dummies Questions & Answers

send output of a file as input for changing date

Hi, Please help me out on this one. I want to send the output of a file as input for changing the date using date command. Example, i have a file date.txt whose contents are 081014462009 I need to use the date in that file as input for date command. I tried cat date.txt | date ; but it... (2 Replies)
Discussion started by: foxtron
2 Replies

4. Shell Programming and Scripting

Create Multiple files by reading a input file and changing the contents

Being new to this area .I have been assigned a task which i am unable to do . Can any one please help me . Hi I have requirement where i have input file XYZ_111_999_YYYYMMDD_1.TXT and with header and series of Numbers and Footer. I want to create a mutiple output files with each file having a... (2 Replies)
Discussion started by: bhargavkr
2 Replies

5. UNIX for Dummies Questions & Answers

redirection stdin

Bonjour, Mon application en C sous linux tourne en redirigeant stdin vers un fichier. Exemple; $appli1 <file1. PB: Je voudrais temporairement redonner la main au user sur le clavier. Alors je pensais ajouter system("appli2"); dans appli1. Dans son main() , appli2() fait seulement un... (1 Reply)
Discussion started by: cypleen
1 Replies

6. UNIX for Dummies Questions & Answers

stdin redirection

Hello, my C application under unix runs in redirecting stdin to a file. Example:$appli1 <file1. This application waits often on a scanf(). But I would temporarely reassign stdin at the keyboard for waiting a user's answer. So I thought to add system("appli2"); in the code of appli1. In its... (4 Replies)
Discussion started by: cypleen
4 Replies

7. UNIX for Advanced & Expert Users

Console Input from a file

hi 2 all whatever in a file that line have to come in console screen .. when i execte that script ... >cat abc date ls >./abc >date ---->that line hav to come here > ls ----> that line hav to come here please anyone help me ! (4 Replies)
Discussion started by: ponmuthu
4 Replies

8. Shell Programming and Scripting

Suplying stdin input within script

Hi , I have script in that , i uninstall rpm using rpm -ef $rc1 now my query is rpm -ef is asking user input DO YOU Want To continue (YES/NO) for each uninstalltion. now i want to supply YES variable when it asks for above statement . so that i dont have to give user input from... (4 Replies)
Discussion started by: raghavendra.nsn
4 Replies

9. UNIX for Dummies Questions & Answers

Redirection of file input to command

Hello, I'm new to Unix (working with OS X 10.8.5) and therefore at the beginning of my adventure. If I ask something stupid, then this is not intentional, but simple nescience. :rolleyes: I have a problem with the redirection of text file content to echo. I was experimenting with redirection... (6 Replies)
Discussion started by: pseudo
6 Replies

10. UNIX for Dummies Questions & Answers

When do I use input redirection?

Can someone please explain when input redirection is necessary? For example, "cat filename" and "cat< filename" produce the same result. I was told that if I need to bunzip a file that I should type "bunzip2<filename.bz2." However, if I omit the "<" I still get the same result. Can someone... (4 Replies)
Discussion started by: PTcharger
4 Replies

LEARN ABOUT SUSE

blogd

BLOGD(8)						       The SuSE boot concept							  BLOGD(8)

NAME

       blogd - boot logging on /dev/console

SYNOPSIS

       /sbin/blogd [/dev/realtty]

DESCRIPTION

       Without	argument blogd determines the real underlying character device of /dev/console.  blogd spawns a pty/tty pair to reconnect the cur-
       rent /dev/console with the slave of the pty/tty pair. During writing information from this slave to the real character device a ring buffer
       is used to hold the information for writing it to an existing logging file.

       To  fetch  the  real  tty  of /dev/console the program showconsole(8) can be used. This has the advantage that blogd will not hold the real
       character device of /dev/console as its controlling tty (would hangup any running getty on that character device).

SIGNALS

       blogd knows a few signal to contol its behavior.

       SIGQUIT, SIGINT, and SIGTERM
	      will cause blogd tries to write out the ring buffer and to exit.

       SIGIO  says blogd that now it is able to write on /var/log/boot.msg which means that the file system is mounted read/write and  the  kernel
	      messages are written to that file.

       SIGSYS says blogd that it should stop writing to disk but continue to repeat messages to the old devices of the system console.

BUGS

       blogd  needs  a	mounted  /proc	and  /dev/pts  file  system  and tries to set the controlling tty to stdin if the real character device of
       /dev/console is not given.  After reading /proc blogd tries to restore the status of the controlling tty to avoid problems with getty  pro-
       cesses.	This can fail because blogd forks to run in the background as a daemon.

FILES

       /proc/<pid of blogd>/stat
	      the stat file of the blogd process.

       /dev/console
	      the system console.

       /var/log/boot.msg
	      logging file which is created by klogd(8) or dmesg(8).

SEE ALSO

       showconsole(8), syslogd(8), klogd(8), dmesg(8), proc(5).

COPYRIGHT

       2000 Werner Fink, 2000 SuSE GmbH Nuernberg, Germany.

AUTHOR

       Werner Fink <werner@suse.de>

3rd Berkeley Distribution					   Nov 10, 2000 							  BLOGD(8)
All times are GMT -4. The time now is 11:08 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy