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UNIX for Dummies Questions & Answers
stdin redirection
Post 302400605 by cypleen on Wednesday 3rd of March 2010 04:44:25 PM
03-03-2010
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Hi
I am doing file redirection at console for use by my binary.
%console%> bin < inputfile
After reading in the entire file, I want my program to continue taking input from the console. So essentially I want to redirect stdin back to console. But I cant figure out how to do it.
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hi,
how does a program know whether some data are available from stdin?
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6. Programming
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:
---------... (1 Reply)
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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:
---------... (3 Replies)
Discussion started by: vvaidyan
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8. UNIX for Dummies Questions & Answers
When a process fork(), the child share the same file descriptors as his father. Thus, they share the same stdin. Quick and dirty exemple below (sorry for the ugly gets() call) :
#include <stdio.h>
#include <unistd.h>
int main()
{
char buf;
if (fork()) { /*parent */
... (1 Reply)
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I'm trying to do something on the bash command line that I will later put into a bash shell script.
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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
LEARN ABOUT OPENSOLARIS
esdcat
esdcat(1) User Commands esdcat(1) NAME
esdcat - play a sound file SYNOPSIS
esdcat [-s hostname:port] [-b] [-h] [-m] [-n filename] [-r freq] [filename] DESCRIPTION
The esdcat application pipes data from the filename specified (or stdin if not specified) to the sound device, using the Enlightened Sound Daemon (esd). OPTIONS
The following options are supported: -s hostname:port Contact the esd server on hostname at port. -b Specify that the output should be in 8-bit format. By default, the output is in 16-bit format. -h Display help text, and exit. -m Specify that the output should be in mono format. By default, the output is in stereo format. -n filename Specify the filename of the input file. If the filename is specified both as an operand and with the -n option, then the value specified with the -n option is ignored. If no filename is specified with the command, then stdin is used. -r freq Specify that the output rate should be set to freq. By default, the output rate is set to 44.1 kHz. OPERANDS
The following operands are supported: filename Specify the filename of the input file. If no filename is specified with the command, then stdin is used. EXAMPLES
Example 1: Playing a sound file "beep" from stdin example% esdcat < beep EXIT STATUS
The following exit values are returned: 0 Application exited successfully >0 Application exited with failure FILES
The following files are used by this application: /usr/bin/esdcat Executable for Enlightened Sound Daemon sound piper ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWgnome-audio | +-----------------------------+-----------------------------+ |Interface stability |Volatile | +-----------------------------+-----------------------------+ SEE ALSO
esdplay(1), esdrec(1), esdsample(1), esdmon(1), esdctl(1), esd-config(1), libesd(3), attributes(5) NOTES
Written by Brian Cameron, Sun Microsystems Inc., 2003, 2006. SunOS 5.11 7 Jan 2003 esdcat(1)