The default location for standard error is the screen. So it stands to reason that by redirecting ls to stderr (which you haven't redirected elsewhere) the output of ls will go to the screen.
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)
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)
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)
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)
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)
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)
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)
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)
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
vm
VM(1) mgetty VM(1)NAME
vm - VoiceModem is the program for handling the voice modem functionality from shell scripts
ACTIONS
beep options [<frequency [<length in 0.001sec>]]>
diagnostics options device name (e.g. ttyS2
dial options phone number
help
play options [<file names]+>
record options file name
shell options [<shell script [shell options]]>
wait options [<time in seconds]>
devicetest
OPTIONS -c n use compression type n
-d n set i/o device
-t, -m, -i, -e, -s, -H equals to -d <2,3,4,5,6,7>
-l s set device string (e.g. -l ttyS2:ttyC0)
-v verbose output
-w use off / on hook signal from local handset to start and stop recording
-x n set debug level
-L n set maximum recording length in sec
-P print first DTMF tone on stdout and exit
-R read and print DTMF string on stdout and exit
-S s set default shell for shell scripts (e.g. -S /bin/sh)
-T n set silence timeout in 0.1sec
-V n set silence threshold to <n> (0-100%%)
SEE ALSO vgetty(1)POD ERRORS
Hey! The above document had some coding errors, which are explained below:
Around line 30:
You forgot a '=back' before '=head1'
Around line 32:
'=item' outside of any '=over'
Around line 71:
You forgot a '=back' before '=head1'
perl v5.10.1 2010-04-04 VM(1)