nshlib: add chmod and chown builtins

nshlib/Kconfig

@@ -341,6 +341,16 @@ config NSH_DISABLE_CD
 	bool "Disable cd"
 	default DEFAULT_SMALL
 
+config NSH_DISABLE_CHMOD
+	bool "Disable chmod"
+	default DEFAULT_SMALL
+	depends on FS_PERMISSION
+
+config NSH_DISABLE_CHOWN
+	bool "Disable chown"
+	default DEFAULT_SMALL
+	depends on FS_PERMISSION
+
 config NSH_DISABLE_CP
 	bool "Disable cp"
 	default DEFAULT_SMALL

nshlib/nsh.h

@@ -963,6 +963,12 @@ int cmd_irqinfo(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv);
 #ifndef CONFIG_NSH_DISABLE_CAT
   int cmd_cat(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv);
 #endif
+#if defined(CONFIG_FS_PERMISSION) && !defined(CONFIG_NSH_DISABLE_CHMOD)
+  int cmd_chmod(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv);
+#endif
+#if defined(CONFIG_FS_PERMISSION) && !defined(CONFIG_NSH_DISABLE_CHOWN)
+  int cmd_chown(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv);
+#endif
 #ifndef CONFIG_NSH_DISABLE_CP
   int cmd_cp(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv);
 #endif

nshlib/nsh_command.c

@@ -168,6 +168,14 @@ static const struct cmdmap_s g_cmdmap[] =
   CMD_MAP("cd",       cmd_cd,       1, 2, "[<dir-path>|-|~|..]"),
 #endif
 
+#if defined(CONFIG_FS_PERMISSION) && !defined(CONFIG_NSH_DISABLE_CHMOD)
+  CMD_MAP("chmod",    cmd_chmod,    3, 3, "<octal-mode> <path>"),
+#endif
+
+#if defined(CONFIG_FS_PERMISSION) && !defined(CONFIG_NSH_DISABLE_CHOWN)
+  CMD_MAP("chown",    cmd_chown,    3, 3, "[<uid>][:<gid>] <path>"),
+#endif
+
 #ifndef CONFIG_NSH_DISABLE_CP
   CMD_MAP("cp",       cmd_cp,       3, 4, "[-r] <source-path> <dest-path>"),
 #endif

nshlib/nsh_fscmds.c

@@ -843,6 +843,129 @@ int cmd_cat(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
 }
 #endif
 
+/****************************************************************************
+ * Name: cmd_chmod
+ *
+ * Description:
+ *   chmod <octal-mode> <path>
+ *
+ *   Only numeric (octal) modes are supported.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_FS_PERMISSION) && !defined(CONFIG_NSH_DISABLE_CHMOD)
+int cmd_chmod(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
+{
+  FAR char *fullpath;
+  FAR char *endptr;
+  long      mode;
+  int       ret = ERROR;
+
+  UNUSED(argc);
+
+  mode = strtol(argv[1], &endptr, 8);
+  if (endptr == argv[1] || *endptr != '\0' || mode < 0 || mode > 0777)
+    {
+      nsh_error(vtbl, g_fmtarginvalid, argv[0]);
+      return ERROR;
+    }
+
+  fullpath = nsh_getfullpath(vtbl, argv[2]);
+  if (fullpath != NULL)
+    {
+      ret = chmod(fullpath, (mode_t)mode);
+      if (ret < 0)
+        {
+          nsh_error(vtbl, g_fmtcmdfailed, argv[0], "chmod", NSH_ERRNO);
+        }
+
+      nsh_freefullpath(fullpath);
+    }
+
+  return ret;
+}
+#endif
+
+/****************************************************************************
+ * Name: cmd_chown
+ *
+ * Description:
+ *   chown <uid>[:<gid>] <path>
+ *   chown [<uid>]:<gid> <path>
+ *
+ *   Only numeric uid/gid forms are supported.  Empty uid or gid fields
+ *   leave that side unchanged.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_FS_PERMISSION) && !defined(CONFIG_NSH_DISABLE_CHOWN)
+int cmd_chown(FAR struct nsh_vtbl_s *vtbl, int argc, FAR char **argv)
+{
+  FAR const char *spec = argv[1];
+  FAR char       *endptr;
+  FAR char       *fullpath;
+  long            value;
+  uid_t           uid = (uid_t)-1;
+  gid_t           gid = (gid_t)-1;
+  int             ret = ERROR;
+
+  UNUSED(argc);
+
+  value = strtol(spec, &endptr, 10);
+  if (endptr != spec)
+    {
+      if (value < 0)
+        {
+          nsh_error(vtbl, g_fmtarginvalid, argv[0]);
+          return ERROR;
+        }
+
+      uid = (uid_t)value;
+    }
+
+  if (*endptr == ':')
+    {
+      FAR const char *gidstr = endptr + 1;
+      if (*gidstr != '\0')
+        {
+          value = strtol(gidstr, &endptr, 10);
+          if (*endptr != '\0' || value < 0)
+            {
+              nsh_error(vtbl, g_fmtarginvalid, argv[0]);
+              return ERROR;
+            }
+
+          gid = (gid_t)value;
+        }
+    }
+  else if (*endptr != '\0')
+    {
+      nsh_error(vtbl, g_fmtarginvalid, argv[0]);
+      return ERROR;
+    }
+
+  if (uid == (uid_t)-1 && gid == (gid_t)-1)
+    {
+      nsh_error(vtbl, g_fmtarginvalid, argv[0]);
+      return ERROR;
+    }
+
+  fullpath = nsh_getfullpath(vtbl, argv[2]);
+  if (fullpath != NULL)
+    {
+      ret = lchown(fullpath, uid, gid);
+      if (ret < 0)
+        {
+          nsh_error(vtbl, g_fmtcmdfailed, argv[0], "chown", NSH_ERRNO);
+        }
+
+      nsh_freefullpath(fullpath);
+    }
+
+  return ret;
+}
+#endif
+
 /****************************************************************************
  * Name: cmd_dmesg
  ****************************************************************************/