usr.bin/mktemp/mktemp.c

   1 /* $NetBSD: mktemp.c,v 1.12 2012/11/03 13:34:08 christos Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1994, 1995, 1996, 1998 Peter Wemm <peter@netplex.com.au>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  */
  29
  30 /*
  31  * This program was originally written long ago, originally for a non
  32  * BSD-like OS without mkstemp().  It's been modified over the years
  33  * to use mkstemp() rather than the original O_CREAT|O_EXCL/fstat/lstat
  34  * etc style hacks.
  35  * A cleanup, misc options and mkdtemp() calls were added to try and work
  36  * more like the OpenBSD version - which was first to publish the interface.
  37  */
  38
  39 #if HAVE_NBTOOL_CONFIG_H
  40 #include "nbtool_config.h"
  41 #endif
  42
  43 #include <sys/cdefs.h>
  44 #include <sys/types.h>
  45 #include <err.h>
  46 #include <paths.h>
  47 #include <stdio.h>
  48 #include <stdlib.h>
  49 #include <string.h>
  50 #include <unistd.h>
  51
  52 #if defined(__RCSID) && !defined(__lint)
  53 __RCSID("$NetBSD: mktemp.c,v 1.12 2012/11/03 13:34:08 christos Exp $");
  54 #endif /* !__lint */
  55
  56 static void usage(void) __dead;
  57
  58 int
  59 main(int argc, char **argv)
  60 {
  61         int c, fd, ret;
  62         char *tmpdir;
  63         const char *prefix;
  64         char *name;
  65         int dflag, qflag, tflag, uflag;
  66
  67         setprogname(*argv);
  68         ret = dflag = qflag = tflag = uflag = 0;
  69         tmpdir = NULL;
  70         prefix = "mktemp";
  71         name = NULL;
  72
  73         while ((c = getopt(argc, argv, "dp:qt:u")) != -1)
  74                 switch (c) {
  75                 case 'd':
  76                         dflag++;
  77                         break;
  78
  79                 case 'p':
  80                         tmpdir = optarg;
  81                         break;
  82
  83                 case 'q':
  84                         qflag++;
  85                         break;
  86
  87                 case 't':
  88                         prefix = optarg;
  89                         tflag++;
  90                         break;
  91
  92                 case 'u':
  93                         uflag++;
  94                         break;
  95
  96                 default:
  97                         usage();
  98                 }
  99
 100         argc -= optind;
 101         argv += optind;
 102
 103         if (tflag == 0 && argc < 1)
 104                 tflag = 1;
 105
 106         if (tflag) {
 107                 if (tmpdir == NULL)
 108                         tmpdir = getenv("TMPDIR");
 109                 if (tmpdir == NULL)
 110                         (void)asprintf(&name, "%s%s.XXXXXXXX", _PATH_TMP,
 111                             prefix);
 112                 else
 113                         (void)asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
 114                 /* if this fails, the program is in big trouble already */
 115                 if (name == NULL) {
 116                         if (qflag)
 117                                 return 1;
 118                         else
 119                                 errx(1, "Cannot generate template");
 120                 }
 121         } else if (argc < 1) {
 122                 usage();
 123         }
 124
 125         /* generate all requested files */
 126         while (name != NULL || argc > 0) {
 127                 if (name == NULL) {
 128                         if (tmpdir)
 129                                 (void)asprintf(&name, "%s/%s",
 130                                     tmpdir, argv[0]);
 131                         else
 132                                 name = strdup(argv[0]);
 133                         argv++;
 134                         argc--;
 135                 }
 136
 137                 if (dflag) {
 138                         if (mkdtemp(name) == NULL) {
 139                                 ret = 1;
 140                                 if (!qflag)
 141                                         warn("mkdtemp failed on %s", name);
 142                         } else {
 143                                 (void)printf("%s\n", name);
 144                                 if (uflag)
 145                                         (void)rmdir(name);
 146                         }
 147                 } else {
 148                         fd = mkstemp(name);
 149                         if (fd < 0) {
 150                                 ret = 1;
 151                                 if (!qflag)
 152                                         warn("mkstemp failed on %s", name);
 153                         } else {
 154                                 (void)close(fd);
 155                                 if (uflag)
 156                                         (void)unlink(name);
 157                                 (void)printf("%s\n", name);
 158                         }
 159                 }
 160                 if (name)
 161                         free(name);
 162                 name = NULL;
 163         }
 164         return ret;
 165 }
 166
 167 static void
 168 usage(void)
 169 {
 170         (void)fprintf(stderr,
 171             "Usage: %s [-dqu] [-p <tmpdir>] {-t prefix | template ...}\n",
 172             getprogname());
 173         exit (1);
 174 }