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         const char *tmpdir, *prefix;
  53         char *name;
  54         int dflag, qflag, tflag, uflag;
  55
  56         ret = dflag = qflag = tflag = uflag = 0;
  57         prefix = "mktemp";
  58         name = NULL;
  59
  60         while ((c = getopt(argc, argv, "dqt:u")) != -1)
  61                 switch (c) {
  62                 case 'd':
  63                         dflag++;
  64                         break;
  65
  66                 case 'q':
  67                         qflag++;
  68                         break;
  69
  70                 case 't':
  71                         prefix = optarg;
  72                         tflag++;
  73                         break;
  74
  75                 case 'u':
  76                         uflag++;
  77                         break;
  78
  79                 default:
  80                         usage();
  81                 }
  82
  83         argc -= optind;
  84         argv += optind;
  85
  86         if (tflag) {
  87                 tmpdir = getenv("TMPDIR");
  88                 if (tmpdir == NULL)
  89                         asprintf(&name, "%s%s.XXXXXXXX", _PATH_TMP, prefix);
  90                 else
  91                         asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
  92                 /* if this fails, the program is in big trouble already */
  93                 if (name == NULL) {
  94                         if (qflag)
  95                                 return (1);
  96                         else
  97                                 errx(1, "cannot generate template");
  98                 }
  99         } else if (argc < 1) {
 100                 usage();
 101         }
 102
 103         /* generate all requested files */
 104         while (name != NULL || argc > 0) {
 105                 if (name == NULL) {
 106                         name = strdup(argv[0]);
 107                         argv++;
 108                         argc--;
 109                 }
 110
 111                 if (dflag) {
 112                         if (mkdtemp(name) == NULL) {
 113                                 ret = 1;
 114                                 if (!qflag)
 115                                         warn("mkdtemp failed on %s", name);
 116                         } else {
 117                                 printf("%s\n", name);
 118                                 if (uflag)
 119                                         rmdir(name);
 120                         }
 121                 } else {
 122                         fd = mkstemp(name);
 123                         if (fd < 0) {
 124                                 ret = 1;
 125                                 if (!qflag)
 126                                         warn("mkstemp failed on %s", name);
 127                         } else {
 128                                 close(fd);
 129                                 if (uflag)
 130                                         unlink(name);
 131                                 printf("%s\n", name);
 132                         }
 133                 }
 134                 if (name)
 135                         free(name);
 136                 name = NULL;
 137         }
 138         return (ret);
 139 }
 140
 141 static void
 142 usage(void)
 143 {
 144         fprintf(stderr,
 145                 "usage: mktemp [-d] [-q] [-t prefix] [-u] template ...\n");
 146         fprintf(stderr,
 147                 "       mktemp [-d] [-q] [-u] -t prefix \n");
 148         exit (1);
 149 }