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Annotation of src/usr.bin/sort/tmp.c, Revision 1.1

1.1     ! millert     1: /*     $OpenBSD$       */
        !             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.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  */
        !            38:
        !            39: #ifndef lint
        !            40: #if 0
        !            41: static char sccsid[] = "@(#)tmp.c      8.1 (Berkeley) 6/6/93";
        !            42: #else
        !            43: static char rcsid[] = "$OpenBSD: $";
        !            44: #endif
        !            45: #endif /* not lint */
        !            46:
        !            47: #include <sys/param.h>
        !            48:
        !            49: #include <err.h>
        !            50: #include <errno.h>
        !            51: #include <limits.h>
        !            52: #include <signal.h>
        !            53: #include <stdio.h>
        !            54: #include <stdlib.h>
        !            55: #include <string.h>
        !            56: #include <unistd.h>
        !            57:
        !            58: #include "sort.h"
        !            59: #include "pathnames.h"
        !            60:
        !            61: #define _NAME_TMP "sort.XXXXXXXX"
        !            62:
        !            63: FILE *
        !            64: ftmp()
        !            65: {
        !            66:        sigset_t set, oset;
        !            67:        FILE *fp;
        !            68:        int fd;
        !            69:        char pathb[_POSIX_PATH_MAX], *path;
        !            70:
        !            71:        path = pathb;
        !            72:        (void)snprintf(path, sizeof(pathb), "%s%s%s", tmpdir,
        !            73:                       (tmpdir[strlen(tmpdir)-1] != '/') ? "/" : "", _NAME_TMP);
        !            74:
        !            75:        sigfillset(&set);
        !            76:        (void)sigprocmask(SIG_BLOCK, &set, &oset);
        !            77:        if ((fd = mkstemp(path)) < 0)
        !            78:                err(2, path);
        !            79:        if (!(fp = fdopen(fd, "w+")))
        !            80:                err(2, path);
        !            81:        (void)unlink(path);
        !            82:
        !            83:        (void)sigprocmask(SIG_SETMASK, &oset, NULL);
        !            84:        return (fp);
        !            85: }