| /* |
| * 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. ***REMOVED*** - see |
| * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change |
| * 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. |
| */ |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93"; |
| #endif /* LIBC_SCCS and not lint */ |
| |
| #ifdef macintosh |
| #include <unix.h> |
| #else |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #endif |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <stdio.h> |
| #include <ctype.h> |
| #include "mcom_db.h" |
| |
| #ifndef _WINDOWS |
| #include <unistd.h> |
| #endif |
| |
| #ifdef _WINDOWS |
| #include <process.h> |
| #include "winfile.h" |
| #endif |
| |
| static int _gettemp(char *path, register int *doopen, int extraFlags); |
| |
| int |
| mkstemp(char *path) |
| { |
| #ifdef XP_OS2 |
| FILE *temp = tmpfile(); |
| |
| return (temp ? fileno(temp) : -1); |
| #else |
| int fd; |
| |
| return (_gettemp(path, &fd, 0) ? fd : -1); |
| #endif |
| } |
| |
| int |
| mkstempflags(char *path, int extraFlags) |
| { |
| int fd; |
| |
| return (_gettemp(path, &fd, extraFlags) ? fd : -1); |
| } |
| |
| /* NB: This routine modifies its input string, and does not always restore it. |
| ** returns 1 on success, 0 on failure. |
| */ |
| static int |
| _gettemp(char *path, register int *doopen, int extraFlags) |
| { |
| register char *start, *trv; |
| struct stat sbuf; |
| unsigned 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) { |
| char saved; |
| if (trv <= path) |
| break; |
| saved = *trv; |
| if (saved == '/' || saved == '\\') { |
| int rv; |
| *trv = '\0'; |
| rv = stat(path, &sbuf); |
| *trv = saved; |
| if (rv) |
| return (0); |
| if (!S_ISDIR(sbuf.st_mode)) { |
| errno = ENOTDIR; |
| return (0); |
| } |
| break; |
| } |
| } |
| |
| for (;;) { |
| if (doopen) { |
| if ((*doopen = |
| open(path, O_CREAT | O_EXCL | O_RDWR | extraFlags, 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*/ |
| } |