can you redirect STDIN with command arguments?
I have tried this approach:
# ./script -option <argument1> <argument2> 0<$2
# $2: ambiguous redirect
Is this possible? (4 Replies)
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 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 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 OSF1
tee
tee(1) General Commands Manual tee(1)NAME
tee - Displays the output of a program and copies it into a file
SYNOPSIS
tee [-ai] file...
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
tee: XCU5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
OPTIONS
Adds the output to the end of file instead of writing over it. Ignores the SIGINT signal.
OPERANDS
Standard input is stored into, or appended to, the file specified.
[Tru64 UNIX] The tee command can accept up to 20 file arguments.
DESCRIPTION
The tee command reads standard input and writes to both standard output, and each specified file.
The tee command is useful when you wish to view program output as it is displayed, and also want to save it in a file. The tee command does
not buffer output, so you may wish to pipe the output of tee to more if more than one full screen of data is anticipated.
NOTES
If a write to any file fails, the exit status of tee will be non-zero. Writes to all other specified files may be successful, and opera-
tion will continue until standard input is exhausted.
EXIT STATUS
The following exit values are returned: Successful completion. An error occurred.
EXAMPLES
To view and save the output from a command at the same time, enter: lint program.c | tee program.lint
This displays the standard output of the command lint program.c at the terminal, and at the same time saves a copy of it in the file
program.lint. If program.lint already exists, it is deleted and replaced. To display and append to a file, enter: lint program.c |
tee -a program.lint
This displays the standard output of lint program.c at the terminal and at the same time appends a copy of it to the end of pro-
gram.lint. If the file program.lint does not exist, it is created.
ENVIRONMENT VARIABLES
The following environment variables affect the execution of tee: Provides a default value for the internationalization variables that are
unset or null. If LANG is unset or null, the corresponding value from the default locale is used. If any of the internationalization vari-
ables contain an invalid setting, the utility behaves as if none of the variables had been defined. If set to a non-empty string value,
overrides the values of all the other internationalization variables. Determines the locale for the interpretation of sequences of bytes
of text data as characters (for example, single-byte as opposed to multibyte characters in arguments). Determines the locale for the for-
mat and contents of diagnostic messages written to standard error. Determines the location of message catalogues for the processing of
LC_MESSAGES.
SEE ALSO
Commands: cat(1), echo(1), script(1)
Standards: standards(5)tee(1)