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--- /dev/null
+++ Libc/Libc-1272.200.26/stdio/FreeBSD/mktemp.c
@@ -0,0 +1,335 @@
+/*
+ * Copyright (c) 1987, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93";
+#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+
+#include "namespace.h"
+#include <assert.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include "un-namespace.h"
+
+#define ALLOWED_MKOSTEMP_FLAGS (O_APPEND | O_SHLOCK | O_EXLOCK | O_CLOEXEC)
+
+char *_mktemp(char *);
+
+typedef enum {
+ FTPP_DONE, FTPP_TRY_NEXT, FTPP_ERROR
+} find_temp_path_progress_t;
+
+/* A contract for actions that find_temp_path performs for every path from
+ * the template.
+ *
+ * If the desired path was found, set result and return FTPP_DONE.
+ * If an IO/FS error ocurred, set errno and return FTPP_ERROR.
+ * Otherwise return FTPP_TRY_NEXT.
+ */
+typedef find_temp_path_progress_t (*find_temp_path_action_t)(
+ int dfd, char *path, void *ctx, void *result);
+
+static int find_temp_path(int dfd, char *path, int slen, bool stat_base_dir,
+ find_temp_path_action_t action, void *action_ctx, void *action_result);
+
+static find_temp_path_progress_t _mkostemps_action(
+ int dfd, char *path, void *ctx, void *result);
+static find_temp_path_progress_t _mktemp_action(
+ int dfd, char *path, void *ctx, void *result);
+static find_temp_path_progress_t _mkdtemp_action(
+ int dfd, char *path, void *ctx, void *result);
+static find_temp_path_progress_t _mkstemp_dprotected_np_action(
+ int dfd, char *path, void *ctx, void *result);
+
+static const char padchar[] =
+"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+int
+mkostemps(char *path, int slen, int oflags)
+{
+ int fd;
+ if (oflags & ~ALLOWED_MKOSTEMP_FLAGS) {
+ errno = EINVAL;
+ return -1;
+ }
+ return (find_temp_path(AT_FDCWD, path, slen, TRUE, _mkostemps_action, &oflags, &fd) ? fd : -1);
+}
+
+int
+mkostempsat_np(int dfd, char *path, int slen, int oflags)
+{
+ int fd;
+ if (oflags & ~ALLOWED_MKOSTEMP_FLAGS) {
+ errno = EINVAL;
+ return -1;
+ }
+ return (find_temp_path(dfd, path, slen, TRUE, _mkostemps_action, &oflags, &fd) ? fd : -1);
+}
+
+int
+mkstemps(char *path, int slen)
+{
+ int fd;
+
+ return (find_temp_path(AT_FDCWD, path, slen, TRUE, _mkostemps_action, NULL, &fd) ? fd : -1);
+}
+
+int
+mkstempsat_np(int dfd, char *path, int slen)
+{
+ int fd;
+
+ return (find_temp_path(dfd, path, slen, TRUE, _mkostemps_action, NULL, &fd) ? fd : -1);
+}
+
+int
+mkostemp(char *path, int oflags)
+{
+ int fd;
+ if (oflags & ~ALLOWED_MKOSTEMP_FLAGS) {
+ errno = EINVAL;
+ return -1;
+ }
+ return (find_temp_path(AT_FDCWD, path, 0, TRUE, _mkostemps_action, &oflags, &fd) ? fd : -1);
+}
+
+int
+mkstemp(char *path)
+{
+ int fd;
+
+ return (find_temp_path(AT_FDCWD, path, 0, TRUE, _mkostemps_action, NULL, &fd) ? fd : -1);
+}
+
+char *
+mkdtemp(char *path)
+{
+ return (find_temp_path(AT_FDCWD, path, 0, TRUE, _mkdtemp_action, NULL, NULL) ?
+ path : (char *)NULL);
+}
+
+char *
+mkdtempat_np(int dfd, char *path)
+{
+ return (find_temp_path(dfd, path, 0, TRUE, _mkdtemp_action, NULL, NULL) ?
+ path : (char *)NULL);
+}
+
+char *
+_mktemp(char *path)
+{
+ return (find_temp_path(AT_FDCWD, path, 0, FALSE, _mktemp_action, NULL, NULL) ?
+ path : (char *)NULL);
+}
+
+__warn_references(mktemp,
+ "warning: mktemp() possibly used unsafely; consider using mkstemp()");
+
+char *
+mktemp(char *path)
+{
+ return (_mktemp(path));
+}
+
+int
+mkstemp_dprotected_np(char *path, int class, int dpflags)
+{
+ int fd;
+ int ctx[2] = { class, dpflags };
+
+ return (find_temp_path(AT_FDCWD, path, 0, TRUE, _mkstemp_dprotected_np_action, &ctx, &fd) ? fd : -1);
+}
+
+/* For every path matching a given template, invoke an action. Depending on
+ * the progress reported by action, stops or tries the next path.
+ * Returns 1 if succeeds, 0 and sets errno if fails.
+ */
+static int
+find_temp_path(int dfd, char *path, int slen, bool stat_base_dir,
+ find_temp_path_action_t action, void *action_ctx, void *action_result)
+{
+ char *start, *trv, *suffp, *carryp;
+ char *pad;
+ struct stat sbuf;
+ int rval;
+ uint32_t rand;
+ char carrybuf[MAXPATHLEN];
+
+ if (slen < 0) {
+ errno = EINVAL;
+ return (0);
+ }
+
+ for (trv = path; *trv != '\0'; ++trv)
+ ;
+ if (trv - path >= MAXPATHLEN) {
+ errno = ENAMETOOLONG;
+ return (0);
+ }
+ trv -= slen;
+ suffp = trv;
+ --trv;
+ if (trv < path || NULL != strchr(suffp, '/')) {
+ errno = EINVAL;
+ return (0);
+ }
+
+ /* Fill space with random characters */
+ while (trv >= path && *trv == 'X') {
+ rand = arc4random_uniform(sizeof(padchar) - 1);
+ *trv-- = padchar[rand];
+ }
+ start = trv + 1;
+
+ /* save first combination of random characters */
+ memcpy(carrybuf, start, suffp - start);
+
+ /*
+ * check the target directory.
+ */
+ if (stat_base_dir) {
+ for (; trv > path; --trv) {
+ if (*trv == '/') {
+ *trv = '\0';
+ rval = fstatat(dfd, path, &sbuf, 0);
+ *trv = '/';
+ if (rval != 0)
+ return (0);
+ if (!S_ISDIR(sbuf.st_mode)) {
+ errno = ENOTDIR;
+ return (0);
+ }
+ break;
+ }
+ }
+ }
+
+ for (;;) {
+ switch (action(dfd, path, action_ctx, action_result)) {
+ case FTPP_DONE:
+ return (1);
+ case FTPP_ERROR:
+ return (0); // errno must be set by the action
+ default:
+ ; // FTPP_TRY_NEXT, fall-through
+ }
+
+ /* If we have a collision, cycle through the space of filenames */
+ for (trv = start, carryp = carrybuf;;) {
+ /* have we tried all possible permutations? */
+ if (trv == suffp) {
+ /* yes - exit with EEXIST */
+ errno = EEXIST;
+ return (0);
+ }
+ pad = strchr(padchar, *trv);
+ if (pad == NULL) {
+ /* this should never happen */
+ errno = EIO;
+ return (0);
+ }
+ /* increment character */
+ *trv = (*++pad == '\0') ? padchar[0] : *pad;
+ /* carry to next position? */
+ if (*trv == *carryp) {
+ /* increment position and loop */
+ ++trv;
+ ++carryp;
+ } else {
+ /* try with new name */
+ break;
+ }
+ }
+ }
+ /*NOTREACHED*/
+}
+
+static find_temp_path_progress_t
+_mkostemps_action(int dfd, char *path, void *ctx, void *result)
+{
+ int oflags = (ctx != NULL) ? *((int *) ctx) : 0;
+ int fd = openat(dfd, path, O_CREAT|O_EXCL|O_RDWR|oflags, 0600);
+ if (fd >= 0) {
+ *((int *) result) = fd;
+ return FTPP_DONE;
+ }
+ return (errno == EEXIST) ?
+ FTPP_TRY_NEXT :
+ FTPP_ERROR; // errno is set already
+}
+
+static find_temp_path_progress_t
+_mktemp_action(int dfd, char *path, void *ctx __unused, void *result __unused)
+{
+ struct stat sbuf;
+ if (fstatat(dfd, path, &sbuf, AT_SYMLINK_NOFOLLOW)) {
+ // stat failed
+ return (errno == ENOENT) ?
+ FTPP_DONE : // path is vacant, done
+ FTPP_ERROR; // errno is set already
+ }
+ return FTPP_TRY_NEXT;
+}
+
+static find_temp_path_progress_t
+_mkdtemp_action(int dfd, char *path, void *ctx __unused, void *result __unused)
+{
+ if (mkdirat(dfd, path, 0700) == 0)
+ return FTPP_DONE;
+ return (errno == EEXIST) ?
+ FTPP_TRY_NEXT :
+ FTPP_ERROR; // errno is set already
+}
+
+static find_temp_path_progress_t
+_mkstemp_dprotected_np_action(int dfd, char *path, void *ctx, void *result)
+{
+ assert(dfd == AT_FDCWD);
+
+ int class = ((int *) ctx)[0];
+ int dpflags = ((int *) ctx)[1];
+ int fd = open_dprotected_np(path, O_CREAT|O_EXCL|O_RDWR, class, dpflags, 0600);
+ if (fd >= 0) {
+ *((int *) result) = fd;
+ return FTPP_DONE;
+ }
+ return (errno == EEXIST) ?
+ FTPP_TRY_NEXT :
+ FTPP_ERROR; // errno is set already
+}
+
+