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-rw-r--r--include/os.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/include/os.h b/include/os.h
index 699682a..038aba9 100644
--- a/include/os.h
+++ b/include/os.h
@@ -40,6 +40,16 @@ struct sandbox_state;
ssize_t os_read(int fd, void *buf, size_t count);
/**
+ * Access to the OS read() system call with non-blocking access
+ *
+ * \param fd File descriptor as returned by os_open()
+ * \param buf Buffer to place data
+ * \param count Number of bytes to read
+ * \return number of bytes read, or -1 on error
+ */
+ssize_t os_read_no_block(int fd, void *buf, size_t count);
+
+/**
* Access to the OS write() system call
*
* \param fd File descriptor as returned by os_open()
@@ -136,4 +146,52 @@ u64 os_get_nsec(void);
*/
int os_parse_args(struct sandbox_state *state, int argc, char *argv[]);
+/*
+ * Types of directory entry that we support. See also os_dirent_typename in
+ * the C file.
+ */
+enum os_dirent_t {
+ OS_FILET_REG, /* Regular file */
+ OS_FILET_LNK, /* Symbolic link */
+ OS_FILET_DIR, /* Directory */
+ OS_FILET_UNKNOWN, /* Something else */
+
+ OS_FILET_COUNT,
+};
+
+/** A directory entry node, containing information about a single dirent */
+struct os_dirent_node {
+ struct os_dirent_node *next; /* Pointer to next node, or NULL */
+ ulong size; /* Size of file in bytes */
+ enum os_dirent_t type; /* Type of entry */
+ char name[0]; /* Name of entry */
+};
+
+/**
+ * Get a directionry listing
+ *
+ * This allocates and returns a linked list containing the directory listing.
+ *
+ * @param dirname Directory to examine
+ * @param headp Returns pointer to head of linked list, or NULL if none
+ * @return 0 if ok, -ve on error
+ */
+int os_dirent_ls(const char *dirname, struct os_dirent_node **headp);
+
+/**
+ * Get the name of a directory entry type
+ *
+ * @param type Type to cehck
+ * @return string containing the name of that type, or "???" if none/invalid
+ */
+const char *os_dirent_get_typename(enum os_dirent_t type);
+
+/**
+ * Get the size of a file
+ *
+ * @param fname Filename to check
+ * @return size of file, or -1 if an error ocurred
+ */
+ssize_t os_get_filesize(const char *fname);
+
#endif