sandbox: Add a way to access persistent test files
Some pytests create files in the persistent-data directory. It is useful
to be able to access these files in C tests. Add a function which can
locate a file given its leaf name, using the environment variable set
up in test/py/conftest.py
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 9e93a0f..85d0d6a 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -258,6 +258,30 @@
return 0;
}
+int os_persistent_file(char *buf, int maxsize, const char *fname)
+{
+ const char *dirname = getenv("U_BOOT_PERSISTENT_DATA_DIR");
+ char *ptr;
+ int len;
+
+ len = strlen(fname) + (dirname ? strlen(dirname) + 1 : 0) + 1;
+ if (len > maxsize)
+ return -ENOSPC;
+
+ ptr = buf;
+ if (dirname) {
+ strcpy(ptr, dirname);
+ ptr += strlen(dirname);
+ *ptr++ = '/';
+ }
+ strcpy(ptr, fname);
+
+ if (access(buf, F_OK) == -1)
+ return -ENOENT;
+
+ return 0;
+}
+
/* Restore tty state when we exit */
static struct termios orig_term;
static bool term_setup;
diff --git a/include/os.h b/include/os.h
index 968412b..fc8a1b1 100644
--- a/include/os.h
+++ b/include/os.h
@@ -98,6 +98,16 @@
*/
int os_unlink(const char *pathname);
+/** os_persistent_fname() - Find the path to a test file
+ *
+ * @buf: Buffer to hold path
+ * @maxsize: Maximum size of buffer
+ * @fname: Leaf filename to find
+ * Returns: 0 on success, -ENOENT if file is not found, -ENOSPC if the buffer is
+ * too small
+ */
+int os_persistent_file(char *buf, int maxsize, const char *fname);
+
/**
* os_exit() - access to the OS exit() system call
*