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- From: Felix Fietkau <[email protected]>
- Date: Thu, 9 Oct 2025 14:11:55 +0200
- Subject: [PATCH] fs: add mkdtemp() method for creating temporary directories
- Returns the directory path as a string, following the same template
- handling pattern as mkstemp().
- Signed-off-by: Felix Fietkau <[email protected]>
- ---
- --- a/lib/fs.c
- +++ b/lib/fs.c
- @@ -2636,6 +2636,86 @@ uc_fs_mkstemp(uc_vm_t *vm, size_t nargs)
- }
-
- /**
- + * Creates a unique temporary directory based on the given template.
- + *
- + * If the template argument is given and contains a relative path, the created
- + * directory will be placed relative to the current working directory.
- + *
- + * If the template argument is given and contains an absolute path, the created
- + * directory will be placed relative to the given directory.
- + *
- + * If the template argument is given but does not contain a directory separator,
- + * the directory will be placed in `/tmp/`.
- + *
- + * If no template argument is given, the default `/tmp/XXXXXX` is used.
- + *
- + * The template argument must end with six consecutive X characters (`XXXXXX`),
- + * which will be replaced with a random string to create the unique directory name.
- + * If the template does not end with `XXXXXX`, it will be automatically appended.
- + *
- + * Returns a string containing the path of the created directory on success.
- + *
- + * Returns `null` if an error occurred, e.g. on insufficient permissions or
- + * inaccessible directory.
- + *
- + * @function module:fs#mkdtemp
- + *
- + * @param {string} [template="/tmp/XXXXXX"]
- + * The path template to use when forming the temporary directory name.
- + *
- + * @returns {?string}
- + *
- + * @example
- + * // Create a unique temporary directory in the current working directory
- + * const tempDir = mkdtemp('./data-XXXXXX');
- + */
- +static uc_value_t *
- +uc_fs_mkdtemp(uc_vm_t *vm, size_t nargs)
- +{
- + uc_value_t *template = uc_fn_arg(0);
- + bool ends_with_template = false;
- + char *path, *t, *result;
- + uc_value_t *rv;
- + size_t l;
- +
- + if (template && ucv_type(template) != UC_STRING)
- + err_return(EINVAL);
- +
- + t = ucv_string_get(template);
- + l = ucv_string_length(template);
- +
- + ends_with_template = (l >= 6 && strcmp(&t[l - 6], "XXXXXX") == 0);
- +
- + if (t && strchr(t, '/')) {
- + if (ends_with_template)
- + xasprintf(&path, "%s", t);
- + else
- + xasprintf(&path, "%s.XXXXXX", t);
- + }
- + else if (t) {
- + if (ends_with_template)
- + xasprintf(&path, "/tmp/%s", t);
- + else
- + xasprintf(&path, "/tmp/%s.XXXXXX", t);
- + }
- + else {
- + xasprintf(&path, "/tmp/XXXXXX");
- + }
- +
- + result = mkdtemp(path);
- +
- + if (!result) {
- + free(path);
- + err_return(errno);
- + }
- +
- + rv = ucv_string_new(result);
- + free(path);
- +
- + return rv;
- +}
- +
- +/**
- * Checks the accessibility of a file or directory.
- *
- * The optional modes argument specifies the access modes which should be
- @@ -3069,6 +3149,7 @@ static const uc_function_list_t global_f
- { "basename", uc_fs_basename },
- { "lsdir", uc_fs_lsdir },
- { "mkstemp", uc_fs_mkstemp },
- + { "mkdtemp", uc_fs_mkdtemp },
- { "access", uc_fs_access },
- { "readfile", uc_fs_readfile },
- { "writefile", uc_fs_writefile },
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