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  */
  27
  28 /*
  29  * This program was originally written long ago, originally for a non
  30  * BSD-like OS without mkstemp().  It's been modified over the years
  31  * to use mkstemp() rather than the original O_CREAT|O_EXCL/fstat/lstat
  32  * etc style hacks.
  33  * A cleanup, misc options and mkdtemp() calls were added to try and work
  34  * more like the OpenBSD version - which was first to publish the interface.
  35  */
  36
  37 #include <err.h>
  38 #include <paths.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <unistd.h>
  43
  44 #ifndef lint
  45 static const char rcsid[] =
  46         "$FreeBSD: src/usr.bin/mktemp/mktemp.c,v 1.2.6.1 2000/10/15 11:37:43 alex Exp $";
  47 #endif /* not lint */
  48
  49 static void usage __P((void));
  50
  51 int
  52 main(int argc, char **argv)
  53 {
  54         int c, fd, ret;
  55         char *tmpdir, *prefix;
  56         char *name;
  57         int dflag, qflag, tflag, uflag;
  58
  59         ret = dflag = qflag = tflag = uflag = 0;
  60         prefix = "mktemp";
  61         name = NULL;
  62
  63         while ((c = getopt(argc, argv, "dqt:u")) != -1)
  64                 switch (c) {
  65                 case 'd':
  66                         dflag++;
  67                         break;
  68
  69                 case 'q':
  70                         qflag++;
  71                         break;
  72
  73                 case 't':
  74                         prefix = optarg;
  75                         tflag++;
  76                         break;
  77
  78                 case 'u':
  79                         uflag++;
  80                         break;
  81
  82                 default:
  83                         usage();
  84                 }
  85
  86         argc -= optind;
  87         argv += optind;
  88
  89         if (tflag) {
  90                 tmpdir = getenv("TMPDIR");
  91                 if (tmpdir == NULL)
  92                         asprintf(&name, "%s%s.XXXXXXXX", _PATH_TMP, prefix);
  93                 else
  94                         asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
  95                 /* if this fails, the program is in big trouble already */
  96                 if (name == NULL) {
  97                         if (qflag)
  98                                 return (1);
  99                         else
 100                                 errx(1, "cannot generate template");
 101                 }
 102         } else if (argc < 1) {
 103                 usage();
 104         }
 105
 106         /* generate all requested files */
 107         while (name != NULL || argc > 0) {
 108                 if (name == NULL) {
 109                         name = strdup(argv[0]);
 110                         argv++;
 111                         argc--;
 112                 }
 113                 if (dflag) {
 114                         if (mkdtemp(name) == NULL) {
 115                                 ret = 1;
 116                                 if (!qflag)
 117                                         warn("mkdtemp failed on %s", name);
 118                         } else {
 119                                 printf("%s\n", name);
 120                                 if (uflag)
 121                                         rmdir(name);
 122                         }
 123                 } else {
 124                         fd = mkstemp(name);
 125                         if (fd < 0) {
 126                                 ret = 1;
 127                                 if (!qflag)
 128                                         warn("mkstemp failed on %s", name);
 129                         } else {
 130                                 close(fd);
 131                                 if (uflag)
 132                                         unlink(name);
 133                                 printf("%s\n", name);
 134                         }
 135                 }
 136                 if (name)
 137                         free(name);
 138                 name = NULL;
 139         }
 140         return (ret);
 141 }
 142
 143 static void
 144 usage()
 145 {
 146         fprintf(stderr,
 147                 "usage: mktemp [-d] [-q] [-t prefix] [-u] template ...\n");
 148         fprintf(stderr,
 149                 "       mktemp [-d] [-q] [-u] -t prefix \n");
 150         exit (1);
 151 }