usr.bin/mktemp/mktemp.c

   1 /*-
   2  * Copyright (c) 1994, 1995, 1996, 1998 Peter Wemm <peter@netplex.com.au>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/usr.bin/mktemp/mktemp.c,v 1.2.6.1 2000/10/15 11:37:43 alex Exp $
  27  * $DragonFly: src/usr.bin/mktemp/mktemp.c,v 1.4 2005/01/01 21:10:43 cpressey Exp $
  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 #include <err.h>
  40 #include <paths.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45
  46 static void usage(void);
  47
  48 int
  49 main(int argc, char **argv)
  50 {
  51         int c, fd, ret;
  52         char *tmpdir;
  53         const char *prefix;
  54         char *name;
  55         int dflag, qflag, tflag, uflag;
  56
  57         ret = dflag = qflag = tflag = uflag = 0;
  58         prefix = "mktemp";
  59         name = NULL;
  60
  61         while ((c = getopt(argc, argv, "dqt:u")) != -1)
  62                 switch (c) {
  63                 case 'd':
  64                         dflag++;
  65                         break;
  66
  67                 case 'q':
  68                         qflag++;
  69                         break;
  70
  71                 case 't':
  72                         prefix = optarg;
  73                         tflag++;
  74                         break;
  75
  76                 case 'u':
  77                         uflag++;
  78                         break;
  79
  80                 default:
  81                         usage();
  82                 }
  83
  84         argc -= optind;
  85         argv += optind;
  86
  87         if (!tflag && argc < 1) {
  88                 tflag = 1;
  89                 prefix = "tmp";
  90         }
  91
  92         if (tflag) {
  93                 tmpdir = getenv("TMPDIR");
  94                 if (tmpdir == NULL)
  95                         asprintf(&name, "%s%s.XXXXXXXX", _PATH_TMP, prefix);
  96                 else
  97                         asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
  98                 /* if this fails, the program is in big trouble already */
  99                 if (name == NULL) {
 100                         if (qflag)
 101                                 return (1);
 102                         else
 103                                 errx(1, "cannot generate template");
 104                 }
 105         }
 106
 107         /* generate all requested files */
 108         while (name != NULL || argc > 0) {
 109                 if (name == NULL) {
 110                         name = strdup(argv[0]);
 111                         argv++;
 112                         argc--;
 113                 }
 114
 115                 if (dflag) {
 116                         if (mkdtemp(name) == NULL) {
 117                                 ret = 1;
 118                                 if (!qflag)
 119                                         warn("mkdtemp failed on %s", name);
 120                         } else {
 121                                 printf("%s\n", name);
 122                                 if (uflag)
 123                                         rmdir(name);
 124                         }
 125                 } else {
 126                         fd = mkstemp(name);
 127                         if (fd < 0) {
 128                                 ret = 1;
 129                                 if (!qflag)
 130                                         warn("mkstemp failed on %s", name);
 131                         } else {
 132                                 close(fd);
 133                                 if (uflag)
 134                                         unlink(name);
 135                                 printf("%s\n", name);
 136                         }
 137                 }
 138                 if (name)
 139                         free(name);
 140                 name = NULL;
 141         }
 142         return (ret);
 143 }
 144
 145 static void
 146 usage(void)
 147 {
 148         fprintf(stderr,
 149                 "usage: mktemp [-d] [-q] [-t prefix] [-u] template ...\n");
 150         fprintf(stderr,
 151                 "       mktemp [-d] [-q] [-u] -t prefix \n");
 152         exit (1);
 153 }