diff options
Diffstat (limited to 'lib/bind/bsd/mktemp.c')
| -rw-r--r-- | lib/bind/bsd/mktemp.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/lib/bind/bsd/mktemp.c b/lib/bind/bsd/mktemp.c new file mode 100644 index 0000000..f201c2d --- /dev/null +++ b/lib/bind/bsd/mktemp.c @@ -0,0 +1,156 @@ +#if defined(LIBC_SCCS) && !defined(lint) +static const char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93"; +static const char rcsid[] = "$Id: mktemp.c,v 1.1.352.1 2005/04/27 05:00:43 sra Exp $"; +#endif /* LIBC_SCCS and not lint */ + +/* + * Copyright (c) 1987, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Portions Copyright (c) 1993 by Digital Equipment Corporation. + * + * 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, and that + * the name of Digital Equipment Corporation not be used in advertising or + * publicity pertaining to distribution of the document or software without + * specific, written prior permission. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT + * CORPORATION 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. + */ + +#include "port_before.h" + +#include <sys/types.h> +#include <sys/stat.h> + +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> + +#include "port_after.h" + +#if (!defined(NEED_MKTEMP)) && (!defined(NEED_MKSTEMP)) +int __mktemp_unneeded__; +#else + +static int gettemp(char *path, int *doopen); + +#ifdef NEED_MKSTEMP +mkstemp(char *path) { + int fd; + + return (gettemp(path, &fd) ? fd : -1); +} +#endif + +#ifdef NEED_MKTEMP +char * +mktemp(char *path) { + return(gettemp(path, (int *)NULL) ? path : (char *)NULL); +} +#endif + +static int +gettemp(char *path, int *doopen) { + char *start, *trv; + struct stat sbuf; + u_int pid; + + pid = getpid(); + for (trv = path; *trv; ++trv); /*%< extra X's get set to 0's */ + while (*--trv == 'X') { + *trv = (pid % 10) + '0'; + pid /= 10; + } + + /* + * check the target directory; if you have six X's and it + * doesn't exist this runs for a *very* long time. + */ + for (start = trv + 1;; --trv) { + if (trv <= path) + break; + if (*trv == '/') { + *trv = '\0'; + if (stat(path, &sbuf)) + return(0); + if (!S_ISDIR(sbuf.st_mode)) { + errno = ENOTDIR; + return(0); + } + *trv = '/'; + break; + } + } + + for (;;) { + if (doopen) { + if ((*doopen = + open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) + return(1); + if (errno != EEXIST) + return(0); + } + else if (stat(path, &sbuf)) + return(errno == ENOENT ? 1 : 0); + + /* tricky little algorithm for backward compatibility */ + for (trv = start;;) { + if (!*trv) + return(0); + if (*trv == 'z') + *trv++ = 'a'; + else { + if (isdigit(*trv)) + *trv = 'a'; + else + ++*trv; + break; + } + } + } + /*NOTREACHED*/ +} + +#endif /*NEED_MKTEMP*/ + +/*! \file */ |
