93 lines
2.7 KiB
C
93 lines
2.7 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)tmpfile.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/types.h>
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#include <signal.h>
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#include <unistd.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <paths.h>
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#include "un-namespace.h"
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FILE *
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tmpfile()
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{
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sigset_t set, oset;
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FILE *fp;
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int fd, sverrno;
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#define TRAILER "tmp.XXXXXX"
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char *buf;
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const char *tmpdir;
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tmpdir = NULL;
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if (issetugid() == 0)
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tmpdir = getenv("TMPDIR");
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if (tmpdir == NULL)
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tmpdir = _PATH_TMP;
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(void)asprintf(&buf, "%s%s%s", tmpdir,
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(tmpdir[strlen(tmpdir) - 1] == '/') ? "" : "/", TRAILER);
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if (buf == NULL)
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return (NULL);
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sigfillset(&set);
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(void)_sigprocmask(SIG_BLOCK, &set, &oset);
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fd = mkstemp(buf);
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if (fd != -1)
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(void)unlink(buf);
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free(buf);
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(void)_sigprocmask(SIG_SETMASK, &oset, NULL);
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if (fd == -1)
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return (NULL);
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if ((fp = fdopen(fd, "w+")) == NULL) {
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sverrno = errno;
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(void)_close(fd);
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errno = sverrno;
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return (NULL);
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}
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return (fp);
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}
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