1/* vi: set sw=4 ts=4: */ 2/* 3 * Mini mktemp implementation for busybox 4 * 5 * Copyright (C) 2000 by Daniel Jacobowitz 6 * Written by Daniel Jacobowitz <dan@debian.org> 7 * 8 * Licensed under GPLv2 or later, see file LICENSE in this source tree. 9 */ 10/* Coreutils 6.12 man page says: 11 * mktemp [OPTION]... [TEMPLATE] 12 * Create a temporary file or directory, safely, and print its name. If 13 * TEMPLATE is not specified, use tmp.XXXXXXXXXX. 14 * -d, --directory 15 * create a directory, not a file 16 * -q, --quiet 17 * suppress diagnostics about file/dir-creation failure 18 * -u, --dry-run 19 * do not create anything; merely print a name (unsafe) 20 * --tmpdir[=DIR] 21 * interpret TEMPLATE relative to DIR. If DIR is not specified, 22 * use $TMPDIR if set, else /tmp. With this option, TEMPLATE must 23 * not be an absolute name. Unlike with -t, TEMPLATE may contain 24 * slashes, but even here, mktemp still creates only the final com- 25 * ponent. 26 * -p DIR use DIR as a prefix; implies -t [deprecated] 27 * -t interpret TEMPLATE as a single file name component, relative to 28 * a directory: $TMPDIR, if set; else the directory specified via 29 * -p; else /tmp [deprecated] 30 */ 31//config:config MKTEMP 32//config: bool "mktemp (4.2 kb)" 33//config: default y 34//config: help 35//config: mktemp is used to create unique temporary files 36 37//applet:IF_MKTEMP(APPLET_NOEXEC(mktemp, mktemp, BB_DIR_BIN, BB_SUID_DROP, mktemp)) 38 39//kbuild:lib-$(CONFIG_MKTEMP) += mktemp.o 40 41//usage:#define mktemp_trivial_usage 42//usage: "[-dt] [-p DIR] [TEMPLATE]" 43//usage:#define mktemp_full_usage "\n\n" 44//usage: "Create a temporary file with name based on TEMPLATE and print its name.\n" 45//usage: "TEMPLATE must end with XXXXXX (e.g. [/dir/]nameXXXXXX).\n" 46//usage: "Without TEMPLATE, -t tmp.XXXXXX is assumed.\n" 47//usage: "\n -d Make directory, not file" 48//usage: "\n -q Fail silently on errors" 49//usage: "\n -t Prepend base directory name to TEMPLATE" 50//usage: "\n -p DIR Use DIR as a base directory (implies -t)" 51//usage: "\n -u Do not create anything; print a name" 52//usage: "\n" 53//usage: "\nBase directory is: -p DIR, else $TMPDIR, else /tmp" 54//usage: 55//usage:#define mktemp_example_usage 56//usage: "$ mktemp /tmp/temp.XXXXXX\n" 57//usage: "/tmp/temp.mWiLjM\n" 58//usage: "$ ls -la /tmp/temp.mWiLjM\n" 59//usage: "-rw------- 1 andersen andersen 0 Apr 25 17:10 /tmp/temp.mWiLjM\n" 60 61#include "libbb.h" 62 63int mktemp_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; 64int mktemp_main(int argc UNUSED_PARAM, char **argv) 65{ 66 const char *path; 67 char *chp; 68 unsigned opts; 69 enum { 70 OPT_d = 1 << 0, 71 OPT_q = 1 << 1, 72 OPT_t = 1 << 2, 73 OPT_p = 1 << 3, 74 OPT_u = 1 << 4, 75 OPT_tmpdir = (1 << 5) * ENABLE_LONG_OPTS, 76 }; 77 78 path = getenv("TMPDIR"); 79 if (!path || path[0] == '\0') 80 path = "/tmp"; 81 82#if ENABLE_LONG_OPTS 83 opts = getopt32long(argv, "^" 84 "dqtp:u" 85 "\0" 86 "?1" /* 1 arg max */, 87 "directory\0" No_argument "d" 88 "quiet\0" No_argument "q" 89 "dry-run\0" No_argument "u" 90 "tmpdir\0" Optional_argument "\xff" 91 , &path, &path 92 ); 93#else 94 opts = getopt32(argv, "^" "dqtp:u" "\0" "?1"/*1 arg max*/, &path); 95#endif 96 97 chp = argv[optind]; 98 if (!chp) { 99 /* GNU coreutils 8.4: 100 * bare "mktemp" -> "mktemp -t tmp.XXXXXX" 101 */ 102 chp = xstrdup("tmp.XXXXXX"); 103 opts |= OPT_t; 104 } 105#if 0 106 /* Don't allow directory separator in template */ 107 if ((opts & OPT_t) && bb_basename(chp) != chp) { 108 errno = EINVAL; 109 goto error; 110 } 111#endif 112 if (opts & (OPT_t|OPT_p|OPT_tmpdir)) 113 chp = concat_path_file(path, chp); 114 115 if (opts & OPT_u) { 116 chp = mktemp(chp); 117 if (chp[0] == '\0') 118 goto error; 119 } else if (opts & OPT_d) { 120 if (mkdtemp(chp) == NULL) 121 goto error; 122 } else { 123 if (mkstemp(chp) < 0) 124 goto error; 125 } 126 puts(chp); 127 return EXIT_SUCCESS; 128 error: 129 if (opts & OPT_q) 130 return EXIT_FAILURE; 131 /* don't use chp as it gets mangled in case of error */ 132 bb_perror_nomsg_and_die(); 133} 134