freebsd-dev/contrib/opie/libopie/open.c

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/* open.c: The __opieopen() library function.
1997-09-29 08:53:38 +00:00
%%% copyright-cmetz-96
2002-03-21 22:50:02 +00:00
This software is Copyright 1996-2001 by Craig Metz, All Rights Reserved.
The Inner Net License Version 3 applies to this software.
You should have received a copy of the license with this software. If
you didn't get a copy, you may request one from <license@inner.net>.
History:
2002-03-21 22:50:02 +00:00
Modified by cmetz for OPIE 2.4. More portable way to get the mode
string for fopen.
Created by cmetz for OPIE 2.3.
*/
#include "opie_cfg.h"
#include <stdio.h>
#include <sys/types.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <sys/stat.h>
#include <errno.h>
#include "opie.h"
#if !HAVE_LSTAT
#define lstat(x, y) stat(x, y)
#endif /* !HAVE_LSTAT */
FILE *__opieopen FUNCTION((file, rw, mode), char *file AND int rw AND int mode)
{
FILE *f;
struct stat st;
if (lstat(file, &st)) {
if (errno != ENOENT)
return NULL;
if (!(f = fopen(file, "w")))
return NULL;
fclose(f);
if (chmod(file, mode))
return NULL;
if (lstat(file, &st))
return NULL;
}
if (!S_ISREG(st.st_mode))
return NULL;
{
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char *fmode;
switch(rw) {
case 0:
fmode = "r";
break;
case 1:
fmode = "r+";
break;
case 2:
fmode = "a";
break;
default:
return NULL;
};
if (!(f = fopen(file, fmode)))
return NULL;
}
return f;
}