/* $NetBSD: mktemp.c,v 1.12 2012/11/03 13:34:08 christos Exp $ */

/*-
 * Copyright (c) 1994, 1995, 1996, 1998 Peter Wemm <peter@netplex.com.au>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

/*
 * This program was originally written long ago, originally for a non
 * BSD-like OS without mkstemp().  It's been modified over the years
 * to use mkstemp() rather than the original O_CREAT|O_EXCL/fstat/lstat
 * etc style hacks.
 * A cleanup, misc options and mkdtemp() calls were added to try and work
 * more like the OpenBSD version - which was first to publish the interface.
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#include <sys/types.h>
#include <err.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#if defined(__RCSID) && !defined(__lint)
__RCSID("$NetBSD: mktemp.c,v 1.12 2012/11/03 13:34:08 christos Exp $");
#endif /* !__lint */

static void usage(void) __dead;

int
main(int argc, char **argv)
{
        int c, fd, ret;
        char *tmpdir;
        const char *prefix;
        char *name;
        int dflag, qflag, tflag, uflag;

        setprogname(*argv);
        ret = dflag = qflag = tflag = uflag = 0;
        tmpdir = NULL;
        prefix = "mktemp";
        name = NULL;

        while ((c = getopt(argc, argv, "dp:qt:u")) != -1)
                switch (c) {
                case 'd':
                        dflag++;
                        break;

                case 'p':
                        tmpdir = optarg;
                        break;
                        
                case 'q':
                        qflag++;
                        break;

                case 't':
                        prefix = optarg;
                        tflag++;
                        break;

                case 'u':
                        uflag++;
                        break;

                default:
                        usage();
                }

        argc -= optind;
        argv += optind;

        if (tflag == 0 && argc < 1)
                tflag = 1;

        if (tflag) {
                if (tmpdir == NULL)
                        tmpdir = getenv("TMPDIR");
                if (tmpdir == NULL)
                        (void)asprintf(&name, "%s%s.XXXXXXXX", _PATH_TMP,
                            prefix);
                else
                        (void)asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
                /* if this fails, the program is in big trouble already */
                if (name == NULL) {
                        if (qflag)
                                return 1;
                        else
                                errx(1, "Cannot generate template");
                }
        } else if (argc < 1) {
                usage();
        }
                
        /* generate all requested files */
        while (name != NULL || argc > 0) {
                if (name == NULL) {
                        if (tmpdir)
                                (void)asprintf(&name, "%s/%s",
                                    tmpdir, argv[0]);
                        else
                                name = strdup(argv[0]);
                        argv++;
                        argc--;
                }

                if (dflag) {
                        if (mkdtemp(name) == NULL) {
                                ret = 1;
                                if (!qflag)
                                        warn("mkdtemp failed on %s", name);
                        } else {
                                (void)printf("%s\n", name);
                                if (uflag)
                                        (void)rmdir(name);
                        }
                } else {
                        fd = mkstemp(name);
                        if (fd < 0) {
                                ret = 1;
                                if (!qflag)
                                        warn("mkstemp failed on %s", name);
                        } else {
                                (void)close(fd);
                                if (uflag)
                                        (void)unlink(name);
                                (void)printf("%s\n", name);
                        }
                }
                if (name)
                        free(name);
                name = NULL;
        }
        return ret;
}

static void
usage(void)
{
        (void)fprintf(stderr,
            "Usage: %s [-dqu] [-p <tmpdir>] {-t prefix | template ...}\n",
            getprogname());
        exit (1);
}