Add tmpnam() and tempnam()

2 files changed, 200 insertions, 0 deletions

diff --git a/nuttx/libc/stdio/lib_tempnam.c b/nuttx/libc/stdio/lib_tempnam.c
new file mode 100644
index 000000000..cf480cdff
--- /dev/null
+++ b/nuttx/libc/stdio/lib_tempnam.c
@@ -0,0 +1,105 @@
+/****************************************************************************
+ * libc/stdio/lib_tempnam.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 NuttX 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: tempnam
+ *
+ * Description:
+ *   The tempnam() function generates a pathname that may be used for a
+ *   temporary file.
+ *
+ *   The tempnam() function allows the user to control the choice of a
+ *   directory. The dir argument points to the name of the directory in which
+ *   the file is to be created. If dir is a null pointer or points to a
+ *   string which is not a name for an appropriate directory, the path prefix
+ *   defined as P_tmpdir in the <stdio.h> header will be used. If that
+ *   directory is not accessible, an implementation-defined directory may be
+ *   used.
+ *
+ *   Many applications prefer their temporary files to have certain initial
+ *   letter sequences in their names. The pfx argument should be used for
+ *   this. This argument may be a null pointer or point to a string of up
+ *   to five bytes to be used as the beginning of the filename.
+ *
+ * Returned Value:
+ *   Upon successful completion, tempnam() will allocate space for a string
+ *   put the generated pathname in that space, and return a pointer to it.
+ *   The pointer will be suitable for use in a subsequent call to free().
+ *   Otherwise, it will return a null pointer and set errno to indicate the
+ *   error.
+ *
+ *   The tempnam() function will fail if:
+ *     ENOMEM - Insufficient storage space is available.
+ *
+ ****************************************************************************/
+
+FAR char *tempnam(FAR const char *dir, FAR const char *pfx)
+{
+  FAR char *path;
+  int ret;
+
+  (void)asprintf(&path, "%s/%s-XXXXXX.tmp", dir, pfx);
+  if (path)
+    {
+      ret = mktemp(path);
+      if (ret == OK)
+        {
+          return path;
+        }
+
+      free(path);
+    }
+
+  set_errno(ENOMEM);
+  return NULL;
+}
diff --git a/nuttx/libc/stdio/lib_tmpnam.c b/nuttx/libc/stdio/lib_tmpnam.c
new file mode 100644
index 000000000..a11080e74
--- /dev/null
+++ b/nuttx/libc/stdio/lib_tmpnam.c
@@ -0,0 +1,95 @@
+/****************************************************************************
+ * libc/stdio/lib_tmpnam.c
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 NuttX 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: tmpnam
+ *
+ * Description:
+ *   The tmpnam() function generates a string that is a valid filename and
+ *   that is not the same as the name of an existing file. The function is
+ *   potentially capable of generating TMP_MAX different strings, but any or
+ *   all of them may already be in use by existing files and thus not be
+ *   suitable return values.
+ *
+ *   The tmpnam() function generates a different string each time it is
+ *   called from the same process, up to {TMP_MAX} times. If it is called
+ *   more than {TMP_MAX} times, the behavior is implementation-defined.
+ *
+ * Returned Value:
+ *   Upon successful completion, tmpnam() returns a pointer to a string. I
+ *   no suitable string can be generated, the tmpnam() function will
+ *   return a null pointer.
+ *
+ *   If the argument s is a null pointer, tmpnam() will leave its result
+ *   in an internal static object and return a pointer to that object.
+ *   Subsequent calls to tmpnam() may modify the same object. If the
+ *   argument s is not a null pointer, it is presumed to point to an
+ *   array of at least L_tmpnam chars; tmpnam() will write its result in
+ *   that array and will return the argument as its value.
+ *
+ ****************************************************************************/
+
+FAR char *tmpnam(FAR char *s)
+{
+  static char path[L_tmpnam];
+  int ret;
+
+  if (s == NULL)
+    {
+      s = path;
+    }
+
+  (void)snprintf(s, L_tmpnam, "%s/XXXXXX.tmp", P_tmpdir);
+  ret = mktemp(s);
+  return (ret == OK) ? s : NULL;
+}