release/src/router/busybox/debianutils/mktemp.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini mktemp implementation for busybox
   4  *
   5  *
   6  * Copyright (C) 2000 by Daniel Jacobowitz
   7  * Written by Daniel Jacobowitz <dan@debian.org>
   8  *
   9  * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
  10  */
  11
  12 /* Coreutils 6.12 man page says:
  13  *        mktemp [OPTION]... [TEMPLATE]
  14  * Create a temporary file or directory, safely, and print its name. If
  15  * TEMPLATE is not specified, use tmp.XXXXXXXXXX.
  16  * -d, --directory
  17  *        create a directory, not a file
  18  * -q, --quiet
  19  *        suppress diagnostics about file/dir-creation failure
  20  * -u, --dry-run
  21  *        do not create anything; merely print a name (unsafe)
  22  * --tmpdir[=DIR]
  23  *        interpret TEMPLATE relative to DIR. If DIR is not specified,
  24  *        use  $TMPDIR if set, else /tmp.  With this option, TEMPLATE must
  25  *        not be an absolute name. Unlike with -t, TEMPLATE may contain
  26  *        slashes, but even here, mktemp still creates only the final com-
  27  *        ponent.
  28  * -p DIR use DIR as a prefix; implies -t [deprecated]
  29  * -t     interpret TEMPLATE as a single file name component, relative  to
  30  *        a  directory:  $TMPDIR, if set; else the directory specified via
  31  *        -p; else /tmp [deprecated]
  32  */
  33
  34
  35 #include "libbb.h"
  36
  37 int mktemp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  38 int mktemp_main(int argc UNUSED_PARAM, char **argv)
  39 {
  40         const char *path;
  41         char *chp;
  42         unsigned opt;
  43
  44         opt_complementary = "?1"; /* 1 argument max */
  45         opt = getopt32(argv, "dqtp:", &path);
  46         chp = argv[optind] ? argv[optind] : xstrdup("tmp.XXXXXX");
  47
  48         if (opt & (4|8)) { /* -t and/or -p */
  49                 const char *dir = getenv("TMPDIR");
  50                 if (dir && *dir != '\0')
  51                         path = dir;
  52                 else if (!(opt & 8)) /* no -p */
  53                         path = "/tmp/";
  54                 /* else path comes from -p DIR */
  55                 chp = concat_path_file(path, chp);
  56         }
  57
  58         if (opt & 1) { /* -d */
  59                 if (mkdtemp(chp) == NULL)
  60                         return EXIT_FAILURE;
  61         } else {
  62                 if (mkstemp(chp) < 0)
  63                         return EXIT_FAILURE;
  64         }
  65
  66         puts(chp);
  67
  68         return EXIT_SUCCESS;
  69 }