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/* $OpenBSD: tmpfile.c,v 1.11 2015/08/31 02:53:57 guenther Exp $ */ |
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/*- |
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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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* 3. 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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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <signal.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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FILE * |
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tmpfile(void) |
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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.XXXXXXXXXX" |
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char buf[sizeof(_PATH_TMP) + sizeof(TRAILER)]; |
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(void)memcpy(buf, _PATH_TMP, sizeof(_PATH_TMP) - 1); |
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(void)memcpy(buf + sizeof(_PATH_TMP) - 1, TRAILER, sizeof(TRAILER)); |
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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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mode_t u; |
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(void)unlink(buf); |
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u = umask(0); |
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(void)umask(u); |
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(void)fchmod(fd, 0666 & ~u); |
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} |
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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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DEF_STRONG(tmpfile); |