shell_cmds/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 #ifdef __APPLE__
  39 #include <limits.h>
  40 #endif
  41 #include <paths.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45 #include <unistd.h>
  46
  47 #ifndef lint
  48 static const char rcsid[] =
  49         "$FreeBSD$";
  50 #endif /* not lint */
  51
  52 static void usage(void);
  53
  54 int
  55 main(int argc, char **argv)
  56 {
  57         int c, fd, ret;
  58         char *tmpdir;
  59         const char *prefix;
  60         char *name;
  61         int dflag, qflag, tflag, uflag;
  62 #ifdef __APPLE__
  63         char tmpbuf[PATH_MAX];
  64         size_t len;
  65 #endif
  66
  67         ret = dflag = qflag = tflag = uflag = 0;
  68         prefix = "mktemp";
  69         name = NULL;
  70
  71         while ((c = getopt(argc, argv, "dqt:u")) != -1)
  72                 switch (c) {
  73                 case 'd':
  74                         dflag++;
  75                         break;
  76
  77                 case 'q':
  78                         qflag++;
  79                         break;
  80
  81                 case 't':
  82                         prefix = optarg;
  83                         tflag++;
  84                         break;
  85
  86                 case 'u':
  87                         uflag++;
  88                         break;
  89
  90                 default:
  91                         usage();
  92                 }
  93
  94         argc -= optind;
  95         argv += optind;
  96
  97         if (!tflag && argc < 1) {
  98                 tflag = 1;
  99                 prefix = "tmp";
 100         }
 101
 102         if (tflag) {
 103 #ifdef __APPLE__
 104                 if (confstr(_CS_DARWIN_USER_TEMP_DIR, tmpbuf, sizeof(tmpbuf)) > 0) {
 105                         tmpdir = tmpbuf;
 106                 } else {
 107                         tmpdir = getenv("TMPDIR");
 108                 }
 109
 110                 if (tmpdir == NULL) {
 111                         tmpdir = _PATH_TMP;
 112                 }
 113
 114                 len = strlen(tmpdir);
 115                 if (len > 0 && tmpdir[len - 1] == '/') {
 116                         asprintf(&name, "%s%s.XXXXXXXX", tmpdir, prefix);
 117                 } else {
 118                         asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
 119                 }
 120 #else
 121                 tmpdir = getenv("TMPDIR");
 122                 if (tmpdir == NULL)
 123                         asprintf(&name, "%s%s.XXXXXXXX", _PATH_TMP, prefix);
 124                 else
 125                         asprintf(&name, "%s/%s.XXXXXXXX", tmpdir, prefix);
 126 #endif
 127                 /* if this fails, the program is in big trouble already */
 128                 if (name == NULL) {
 129                         if (qflag)
 130                                 return (1);
 131                         else
 132                                 errx(1, "cannot generate template");
 133                 }
 134         }
 135
 136         /* generate all requested files */
 137         while (name != NULL || argc > 0) {
 138                 if (name == NULL) {
 139                         name = strdup(argv[0]);
 140                         argv++;
 141                         argc--;
 142                 }
 143
 144                 if (dflag) {
 145                         if (mkdtemp(name) == NULL) {
 146                                 ret = 1;
 147                                 if (!qflag)
 148                                         warn("mkdtemp failed on %s", name);
 149                         } else {
 150                                 printf("%s\n", name);
 151                                 if (uflag)
 152                                         rmdir(name);
 153                         }
 154                 } else {
 155                         fd = mkstemp(name);
 156                         if (fd < 0) {
 157                                 ret = 1;
 158                                 if (!qflag)
 159                                         warn("mkstemp failed on %s", name);
 160                         } else {
 161                                 close(fd);
 162                                 if (uflag)
 163                                         unlink(name);
 164                                 printf("%s\n", name);
 165                         }
 166                 }
 167                 if (name)
 168                         free(name);
 169                 name = NULL;
 170         }
 171         return (ret);
 172 }
 173
 174 static void
 175 usage(void)
 176 {
 177         fprintf(stderr,
 178                 "usage: mktemp [-d] [-q] [-t prefix] [-u] template ...\n");
 179         fprintf(stderr,
 180                 "       mktemp [-d] [-q] [-u] -t prefix \n");
 181         exit (1);
 182 }