Annotation of prex/usr/lib/libc/stdio/tmpfile.c, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 1990, 1993
3: * The Regents of the University of California. All rights reserved.
4: *
5: * This code is derived from software contributed to Berkeley by
6: * Chris Torek.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. Neither the name of the University nor the names of its contributors
17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/types.h>
34: #include <signal.h>
35: #include <unistd.h>
36: #include <errno.h>
37: #include <stdio.h>
38: #include <string.h>
39: #include <paths.h>
40:
41: FILE *
42: tmpfile()
43: {
44: sigset_t set, oset;
45: FILE *fp;
46: int fd, sverrno;
47: #define TRAILER "tmp.XXXXXX"
48: char buf[sizeof(_PATH_TMP) + sizeof(TRAILER)];
49:
50: (void)memcpy(buf, _PATH_TMP, sizeof(_PATH_TMP) - 1);
51: (void)memcpy(buf + sizeof(_PATH_TMP) - 1, TRAILER, sizeof(TRAILER));
52:
53: sigfillset(&set);
54: (void)sigprocmask(SIG_BLOCK, &set, &oset);
55:
56: fd = mkstemp(buf);
57: if (fd != -1)
58: (void)unlink(buf);
59:
60: (void)sigprocmask(SIG_SETMASK, &oset, NULL);
61:
62: if (fd == -1)
63: return (NULL);
64:
65: if ((fp = fdopen(fd, "w+")) == NULL) {
66: sverrno = errno;
67: (void)close(fd);
68: errno = sverrno;
69: return (NULL);
70: }
71: return (fp);
72: }
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