Redirecting stdout

[DeanWinchester]

Hello everyone,
I'm executing the following command on the terminal :

find . | ./so du

The output is something like this :

32	./GuardaLinhas
288	.
16	./.DS_Store
32	./GuardaLinhas
16	./GuardaLinhas/.DS_Store
8	./GuardaLinhas/a
8	./GuardaLinhas/o
24	./mapreduce
8	./mapreduce.c
8	./processosacorrer.rtf
24	./so
8	./so.c
8	./sotrab.txt
8	./sotrab2.txt
24	./testeso
8	./testeso.c
120	./tp-lcc.pdf

I want all of this output to be sent to a textfile.
Is this possible ?

[anduril462]

Redirecting standard input and output in Linux

[DeanWinchester]

Redirecting standard input and output in Linux

Thanks, will study it and post any doubts I have.

[DeanWinchester]

These are all commands I can use on the terminal but I need to able to redirect the output of the command I insert in the terminal to a txt.

I'm trying to do it like this :

fp = freopen ("/Users/machd/Desktop/SistemasOperativos2013/stdout", "a+", stdout);

And it works but it sends it to that txt and the rest doesn't appear in the terminal.

[Barney McGrew]

If you don't want to code that functionality into your program you can use tee, otherwise you could look at fopen and do an extra write to a file for each one you do to stdout.

[Adak]

Why not use

find . | ./so du >mytextFile

?

[DeanWinchester]

Why not use

find . | ./so du >mytextFile

?

Because that's not the point.
I need to code it.

The output is generated due to this :

tam=strlen(str);
str[tam-1]='\0';  
map(argv[1],str);

The function map runs an execl

[phantomotap]

O_o

Well, if I understand correctly, I vote for "tee" like Barney McGrew suggested: find . | ./so du | tee /dev/tty textfile

If you are saying instead that your application proper needs to write to `stdout' while redirecting the spawned children you have to do that with your code for your executable.

1): Process a particular CLI argument as the target filename defaulting to `stdout'. (your_exe -o textfile)
2): Copy the `stdout' descriptor for your own use so that you may continue to write whatever you want to the real `stdout'.
3): Use `open' with `dup2', or related API, before `execl' so that the child process inherits a different descriptor for `stdio'.

Soma