redirecting stdout

**gregulator** · 04-21-2004

I'm trying to redirect stdout in the case of the append operator, ">>". When trying to open the correct file descriptor using the following line I get an error.

fd[1] = open(output_file, O_WRONLY|O_CREAT|O_APPEND, 0666);

When I try to compile my program I get these errors:

'O_WRONLY' undeclared (first use in this function)
'O_CREAT' undeclared (first use in this function)
'O_APPEND' undeclared (first use in this function)

I have included 'unistd.h' and 'fcnt1.h' since I thought those were the two header files I needed in order for the above line of code to work. But I don't really know why those file descriptor flags don't get recognized. Anyone have any suggestions?

**linuxdude** · 04-21-2004

you forgot to include this library(or at least mispelled it)

Code:

       #include <fcntl.h>

You have fcnt1<-that is a 1(one) not fcntl <-that is an l(el)

**chrismiceli** · 04-22-2004

if it helps, fcntl.h stands for FileControl.h.

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