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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:23:56 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:23:56 +0000 |
commit | 9620f76a210d9d8c1aaff25e99d6dc513f87e6e9 (patch) | |
tree | ceecc90fb95780872c35da764c5163f38e4727c4 /lib/util/mktemp.c | |
parent | Initial commit. (diff) | |
download | sudo-9620f76a210d9d8c1aaff25e99d6dc513f87e6e9.tar.xz sudo-9620f76a210d9d8c1aaff25e99d6dc513f87e6e9.zip |
Adding upstream version 1.8.27.upstream/1.8.27upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lib/util/mktemp.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/lib/util/mktemp.c b/lib/util/mktemp.c new file mode 100644 index 0000000..f153924 --- /dev/null +++ b/lib/util/mktemp.c @@ -0,0 +1,129 @@ +/* + * Copyright (c) 2001, 2003, 2004, 2008-2011, 2013, 2015, 2017, 2018 + * Todd C. Miller <Todd.Miller@sudo.ws> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#include <config.h> + +#if !defined(HAVE_MKSTEMPS) || !defined(HAVE_MKDTEMP) + +#include <sys/types.h> +#include <sys/time.h> +#include <sys/stat.h> + +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <stdio.h> +#ifdef HAVE_STDLIB_H +# include <stdlib.h> +#endif /* HAVE_STDLIB_H */ +#if defined(HAVE_STDINT_H) +# include <stdint.h> +#elif defined(HAVE_INTTYPES_H) +# include <inttypes.h> +#endif +#ifdef HAVE_STRING_H +# include <string.h> +#endif /* HAVE_STRING_H */ +#ifdef HAVE_STRINGS_H +# include <strings.h> +#endif /* HAVE_STRINGS_H */ +#include <ctype.h> +#include <unistd.h> +#include <time.h> + +#include "sudo_compat.h" +#include "sudo_rand.h" +#include "pathnames.h" + +#define MKTEMP_FILE 1 +#define MKTEMP_DIR 2 + +#define TEMPCHARS "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" +#define NUM_CHARS (sizeof(TEMPCHARS) - 1) +#define MIN_X 6 + +static int +mktemp_internal(char *path, int slen, int mode) +{ + char *start, *cp, *ep; + const char tempchars[] = TEMPCHARS; + unsigned int r, tries; + size_t len; + int fd; + + len = strlen(path); + if (len < MIN_X || slen < 0 || (size_t)slen > len - MIN_X) { + errno = EINVAL; + return -1; + } + ep = path + len - slen; + + tries = 1; + for (start = ep; start > path && start[-1] == 'X'; start--) { + if (tries < INT_MAX / NUM_CHARS) + tries *= NUM_CHARS; + } + tries *= 2; + if (ep - start < MIN_X) { + errno = EINVAL; + return -1; + } + + do { + for (cp = start; cp != ep; cp++) { + r = arc4random_uniform(NUM_CHARS); + *cp = tempchars[r]; + } + + switch (mode) { + case MKTEMP_FILE: + fd = open(path, O_CREAT|O_EXCL|O_RDWR, S_IRUSR|S_IWUSR); + if (fd != -1 || errno != EEXIST) + return fd; + break; + case MKTEMP_DIR: + if (mkdir(path, S_IRWXU) == 0) + return 0; + if (errno != EEXIST) + return -1; + break; + } + } while (--tries); + + errno = EEXIST; + return -1; +} + +int +sudo_mkstemps(char *path, int slen) +{ + return mktemp_internal(path, slen, MKTEMP_FILE); +} + +char * +sudo_mkdtemp(char *path) +{ + if (mktemp_internal(path, 0, MKTEMP_DIR) == -1) + return NULL; + return path; +} +#endif /* !HAVE_MKSTEMPS || !HAVE_MKDTEMP */ |