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need help with FreeBSD!!!


 
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Top Forums UNIX for Dummies Questions & Answers need help with FreeBSD!!!
# 1  
Old 02-27-2001
Data

Hi
I want to write to my output_file using:

if((fptr = creat(output_file, _S_IWRITE)) == -1)
{
printf("output_file..."..);
return (1);
}
for(...)
{
_write(fptr, buffer, BUF_SIZE);
}

It says "_S_IWRITE" undeclared!!!
Anybody knows what function I can use for that and what I have to include in the header files???
Thanks.

P.S. I #include<sys/file.h>
# 2  
Old 02-27-2001
When I have this problem I normally go into the /usr/include or other include directories on the system and grep for the missing #define, in your case S_IWRITE. It always help to know what what compiler you are using when posting these types of C programming system questions.

BTW, nothing in the /include main dir on my linux box:

Quote:
# cd /usr/include
# grep S_IWRITE *.h
#
Sorry, I'm lazy to check the subdirectories and other directories (since you are on BSD and not linux... I'm just a linux basement here). Perhaps someone with BSD can grep?

[Edited by Neo on 02-27-2001 at 09:14 PM]
# 3  
Old 02-28-2001
From the creat(2) man page:
Quote:
CREAT(2) FreeBSD System Calls Manual CREAT(2)

NAME
creat - create a new file

LIBRARY
Standard C Library (libc, -lc)

SYNOPSIS
#include &lt;fcntl.h&gt;

int
creat(const char *path, mode_t mode)

DESCRIPTION
This interface is made obsolete by: open(2).

Creat() is the same as:

open(path, O_CREAT | O_TRUNC | O_WRONLY, mode);

SEE ALSO
open(2)

HISTORY
The creat() function call appeared in Version 6 AT&T UNIX.

4th Berkeley Distribution June 2, 1993 1
So, it looks like you should be using open() instead.
Also, the #define you are trying to use is S_IWRITE, not _S_IWRITE. It is in sys/stat.h

# 4  
Old 02-28-2001
Bug I got it!

I use "((ptr = creat (filename, S_IWGRP)) == -1) and it works.
Thanks.
 

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