usr/src/cmd/mktemp/mktemp.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  *
  25  * Create unique plain files or directories.
  26  */
  27
  28 #pragma ident   "%Z%%M% %I%     %E% SMI"
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <unistd.h>
  33 #include <string.h>
  34 #include <locale.h>
  35
  36 static void
  37 usage(void)
  38 {
  39         (void) fprintf(stderr,
  40             gettext("Usage: mktemp [-dqtu] [-p prefix_dir] [template]\n"));
  41         exit(1);
  42         /* NOTREACHED */
  43 }
  44
  45 int
  46 main(int argc, char **argv)
  47 {
  48         int opt;
  49         char *prefix = NULL;
  50         boolean_t dounlink = B_FALSE;
  51         boolean_t domkdir = B_FALSE;
  52         boolean_t quiet = B_FALSE;
  53         boolean_t usetmpdir = B_FALSE;
  54         char template[] = "tmp.XXXXXX";
  55         char *tmpl;
  56
  57         (void) setlocale(LC_ALL, "");
  58
  59 #ifndef TEXT_DOMAIN
  60 #define TEXT_DOMAIN "SYS_TEST"
  61 #endif
  62         (void) textdomain(TEXT_DOMAIN);
  63
  64         opterr = 0;
  65
  66         while ((opt = getopt(argc, argv, "dqtup:")) != EOF) {
  67                 switch (opt) {
  68                 case 'd':
  69                         domkdir = B_TRUE;
  70                         break;
  71                 case 'q':
  72                         quiet = B_TRUE;
  73                         break;
  74                 case 'p':
  75                         prefix = optarg;
  76                         /* FALLTHROUGH - -p implies -t */
  77                 case 't':
  78                         usetmpdir = B_TRUE;
  79                         break;
  80                 case 'u':
  81                         dounlink = B_TRUE;
  82                         break;
  83                 default:
  84                         usage();
  85                 }
  86         }
  87         argc -= optind;
  88         argv += optind;
  89         switch (argc) {
  90         case 0:
  91                 tmpl = template;
  92                 usetmpdir = B_TRUE;
  93                 break;
  94         case 1:
  95                 tmpl = argv[0];
  96                 break;
  97         default:
  98                 usage();
  99         }
 100
 101         if (usetmpdir) {
 102                 char *tmp = getenv("TMPDIR");
 103                 size_t len;
 104
 105                 if (strchr(tmpl, '/') != NULL) {
 106                         (void) fprintf(stderr,
 107                             gettext("mktemp: template argument specified "
 108                             "with -t/-p option must not contain '/'"
 109                             "\n"));
 110                         return (1);
 111                 }
 112                 /* TMPDIR overrides -p so that scripts will honor $TMPDIR */
 113                 if (tmp != NULL)
 114                         prefix = tmp;
 115                 else if (prefix == NULL)
 116                         prefix = "/tmp";
 117
 118                 len = snprintf(NULL, 0, "%s/%s", prefix, tmpl) + 1;
 119                 tmp = malloc(len);
 120                 if (tmp == NULL) {
 121                         perror("malloc");
 122                         return (1);
 123                 }
 124                 (void) snprintf(tmp, len, "%s/%s", prefix, tmpl);
 125                 tmpl = tmp;
 126         }
 127
 128         if (domkdir) {
 129                 if (mkdtemp(tmpl) == NULL) {
 130                         if (!quiet) {
 131                                 (void) fprintf(stderr,
 132                                     gettext("mktemp: failed to create "
 133                                     "directory: %s\n"), tmpl);
 134                         }
 135                         return (1);
 136                 }
 137                 if (dounlink)
 138                         (void) rmdir(tmpl);
 139         } else {
 140                 if (mkstemp(tmpl) < 0) {
 141                         if (!quiet) {
 142                                 (void) fprintf(stderr,
 143                                     gettext("mktemp: failed to create file: "
 144                                     "%s\n"), tmpl);
 145                         }
 146                         return (1);
 147                 }
 148                 if (dounlink)
 149                         (void) unlink(tmpl);
 150         }
 151         (void) puts(tmpl);
 152         return (0);
 153 }