[LCP]creating files with open()

[Andrew Weaver]

First off, use FILE for the file, not int. What are your permissions in the
directory you run your program and what is the umask setting?

> -----Original Message-----
> From:	Andy Zivkovic [SMTP:andy at zivkotech.net.au]
> Sent:	Saturday, September 29, 2001 1:17 PM
> To:	linuxcprogramming at lists.linux.org.au
> Subject:	[LCP]creating files with open()
> 
> Hi,
> 
> I'm trying to open/create a file if it doesn't exist, then write to it,
> however writes are failing. Additionally, the permissions on the file is
> really strange. On linux (home) and windows (home) the function I've
> copied
> below creates the file, but the write fails, and the close succeeds. On
> Solaris (uni) the open fails.
> 
> Is there anything immediately obvious with my program?
> 
> The test program I'm using is:
> 
> int main(int argc, char *argv[]) {
>   int file, ret;
> 
>   file = open("file.txt", O_CREAT|O_EXCL);
> 
>   printf("file = %d\n", file);
> 
>   ret = write(file, "12345\n", 6);
> 
>   printf("ret = %d\n", ret);
>   if (ret < 0) {
>     printf("%s\n", strerror(errno));
>   }
> 
>   ret = close(file);
>   printf("ret = %d\n", ret);
> }
> 
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