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/*
* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: os.c,v 1.10 2007/06/19 23:46:59 tbox Exp $ */
/*! \file */
#include <config.h>
#include <rndc/os.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
int
set_user(FILE *fd, const char *user) {
struct passwd *pw;
pw = getpwnam(user);
if (pw == NULL) {
errno = EINVAL;
return (-1);
}
return (fchown(fileno(fd), pw->pw_uid, -1));
}
FILE *
safe_create(const char *filename) {
int fd;
FILE *f;
struct stat sb;
int flags = O_WRONLY;
if (stat(filename, &sb) == -1) {
if (errno != ENOENT)
return (NULL);
flags = O_WRONLY | O_CREAT | O_EXCL;
} else if ((sb.st_mode & S_IFREG) == 0) {
errno = EOPNOTSUPP;
return (NULL);
} else
flags = O_WRONLY | O_TRUNC;
fd = open(filename, flags, S_IRUSR | S_IWUSR);
if (fd == -1)
return (NULL);
f = fdopen(fd, "w");
if (f == NULL)
close(fd);
return (f);
}
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