Annotation of src/usr.bin/sort/tmp.c, Revision 1.9
1.9 ! deraadt 1: /* $OpenBSD: tmp.c,v 1.8 2008/03/19 19:25:49 kili Exp $ */
1.1 millert 2:
3: /*-
4: * Copyright (c) 1993
5: * The Regents of the University of California. All rights reserved.
6: *
7: * This code is derived from software contributed to Berkeley by
8: * Peter McIlroy.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
1.5 millert 18: * 3. Neither the name of the University nor the names of its contributors
1.1 millert 19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
33: */
34:
35: #include <sys/param.h>
36:
37: #include <err.h>
38: #include <errno.h>
39: #include <limits.h>
40: #include <signal.h>
41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <string.h>
44: #include <unistd.h>
45:
46: #include "sort.h"
47: #include "pathnames.h"
48:
1.2 millert 49: #define _NAME_TMP "sort.XXXXXXXXXX"
1.1 millert 50:
51: FILE *
1.6 deraadt 52: ftmp(void)
1.1 millert 53: {
54: sigset_t set, oset;
55: FILE *fp;
56: int fd;
1.8 kili 57: char path[PATH_MAX];
1.1 millert 58:
1.7 ray 59: if (tmpdir[0] == '\0')
60: errx(2, "invalid temporary directory: \"\"");
1.8 kili 61: (void)snprintf(path, sizeof(path), "%s%s%s", tmpdir,
1.1 millert 62: (tmpdir[strlen(tmpdir)-1] != '/') ? "/" : "", _NAME_TMP);
63:
64: sigfillset(&set);
65: (void)sigprocmask(SIG_BLOCK, &set, &oset);
66: if ((fd = mkstemp(path)) < 0)
1.3 millert 67: err(2, "%s", path);
1.1 millert 68: if (!(fp = fdopen(fd, "w+")))
1.3 millert 69: err(2, "%s", path);
1.1 millert 70: (void)unlink(path);
71:
72: (void)sigprocmask(SIG_SETMASK, &oset, NULL);
73: return (fp);
74: }