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Annotation of src/usr.bin/sort/tmp.c, Revision 1.7

1.7     ! ray         1: /*     $OpenBSD: tmp.c,v 1.6 2003/06/10 22:20:51 deraadt 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: #ifndef lint
                     36: #if 0
                     37: static char sccsid[] = "@(#)tmp.c      8.1 (Berkeley) 6/6/93";
                     38: #else
1.7     ! ray        39: static char rcsid[] = "$OpenBSD: tmp.c,v 1.6 2003/06/10 22:20:51 deraadt Exp $";
1.1       millert    40: #endif
                     41: #endif /* not lint */
                     42:
                     43: #include <sys/param.h>
                     44:
                     45: #include <err.h>
                     46: #include <errno.h>
                     47: #include <limits.h>
                     48: #include <signal.h>
                     49: #include <stdio.h>
                     50: #include <stdlib.h>
                     51: #include <string.h>
                     52: #include <unistd.h>
                     53:
                     54: #include "sort.h"
                     55: #include "pathnames.h"
                     56:
1.2       millert    57: #define _NAME_TMP "sort.XXXXXXXXXX"
1.1       millert    58:
                     59: FILE *
1.6       deraadt    60: ftmp(void)
1.1       millert    61: {
                     62:        sigset_t set, oset;
                     63:        FILE *fp;
                     64:        int fd;
1.4       millert    65:        char pathb[PATH_MAX], *path;
1.1       millert    66:
                     67:        path = pathb;
1.7     ! ray        68:        if (tmpdir[0] == '\0')
        !            69:                errx(2, "invalid temporary directory: \"\"");
1.1       millert    70:        (void)snprintf(path, sizeof(pathb), "%s%s%s", tmpdir,
                     71:                       (tmpdir[strlen(tmpdir)-1] != '/') ? "/" : "", _NAME_TMP);
                     72:
                     73:        sigfillset(&set);
                     74:        (void)sigprocmask(SIG_BLOCK, &set, &oset);
                     75:        if ((fd = mkstemp(path)) < 0)
1.3       millert    76:                err(2, "%s", path);
1.1       millert    77:        if (!(fp = fdopen(fd, "w+")))
1.3       millert    78:                err(2, "%s", path);
1.1       millert    79:        (void)unlink(path);
                     80:
                     81:        (void)sigprocmask(SIG_SETMASK, &oset, NULL);
                     82:        return (fp);
                     83: }