/* * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC") * Copyright (C) 2001 Internet Software Consortium. * * Permission to use, copy, modify, and 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 1.6.18.2 2005/04/29 00:15:41 marka 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); }