Added ssh_basename() and ssh_dirname().

include/libssh/libssh.h

@@ -443,6 +443,10 @@ LIBSSH_API int ssh_userauth_kbdint_setanswer(SSH_SESSION *session, unsigned int
 LIBSSH_API int ssh_init(void);
 LIBSSH_API int ssh_finalize(void);
 
+/* misc.c */
+char *ssh_dirname (const char *path);
+char *ssh_basename (const char *path);
+
 /* messages.c */
 typedef struct ssh_message SSH_MESSAGE;
 

libssh/misc.c

@@ -238,6 +238,114 @@ const void *_ssh_list_get_head(struct ssh_list *list){
   return data;
 }
 
+/**
+ * @brief Parse directory component.
+ *
+ * dirname breaks a null-terminated pathname string into a directory component.
+ * In the usual case, ssh_dirname() returns the string up to, but not including,
+ * the final '/'. Trailing '/' characters are  not  counted as part of the
+ * pathname. The caller must free the memory.
+ *
+ * @param path  The path to parse.
+ *
+ * @return  The dirname of path or NULL if we can't allocate memory. If path
+ *          does not contain a slash, c_dirname() returns the string ".".  If
+ *          path is the string "/", it returns the string "/". If path is
+ *          NULL or an empty string, "." is returned.
+ */
+char *ssh_dirname (const char *path) {
+  char *new = NULL;
+  unsigned int len;
+
+  if (path == NULL || *path == '\0') {
+    return strdup(".");
+  }
+
+  len = strlen(path);
+
+  /* Remove trailing slashes */
+  while(len > 0 && path[len - 1] == '/') --len;
+
+  /* We have only slashes */
+  if (len == 0) {
+    return strdup("/");
+  }
+
+  /* goto next slash */
+  while(len > 0 && path[len - 1] != '/') --len;
+
+  if (len == 0) {
+    return strdup(".");
+  } else if (len == 1) {
+    return strdup("/");
+  }
+
+  /* Remove slashes again */
+  while(len > 0 && path[len - 1] == '/') --len;
+
+  new = malloc(len + 1);
+  if (new == NULL) {
+    return NULL;
+  }
+
+  strncpy(new, path, len);
+  new[len] = '\0';
+
+  return new;
+}
+
+/**
+ * @brief basename - parse filename component.
+ *
+ * basename breaks a null-terminated pathname string into a filename component.
+ * ssh_basename() returns the component following the final '/'.  Trailing '/'
+ * characters are not counted as part of the pathname.
+ *
+ * @param path The path to parse.
+ *
+ * @return  The filename of path or NULL if we can't allocate memory. If path
+ *          is a the string "/", basename returns the string "/". If path is
+ *          NULL or an empty string, "." is returned.
+ */
+char *ssh_basename (const char *path) {
+  char *new = NULL;
+  const char *s;
+  unsigned int len;
+
+  if (path == NULL || *path == '\0') {
+    return strdup(".");
+  }
+
+  len = strlen(path);
+  /* Remove trailing slashes */
+  while(len > 0 && path[len - 1] == '/') --len;
+
+  /* We have only slashes */
+  if (len == 0) {
+    return strdup("/");
+  }
+
+  while(len > 0 && path[len - 1] != '/') --len;
+
+  if (len > 0) {
+    s = path + len;
+    len = strlen(s);
+
+    while(len > 0 && s[len - 1] == '/') --len;
+  } else {
+    return strdup(path);
+  }
+
+  new = malloc(len + 1);
+  if (new == NULL) {
+    return NULL;
+  }
+
+  strncpy(new, s, len);
+  new[len] = '\0';
+
+  return new;
+}
 
 /** @} */
 /* vim: set ts=2 sw=2 et cindent: */