shell: Add CMDLS, CMDCHOWN, CMDCHMOD commands

1 files changed, 106 insertions, 0 deletions

diff --git a/cpukit/libmisc/shell/main_cmdchown.c b/cpukit/libmisc/shell/main_cmdchown.c
new file mode 100644
index 0000000000..9cc8c4435e
--- /dev/null
+++ b/cpukit/libmisc/shell/main_cmdchown.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <rtems/shellconfig.h>
+
+#include "internal.h"
+
+static int usage(void)
+{
+  puts(rtems_shell_CMDCHOWN_Command.usage);
+
+  return -1;
+}
+
+static void error(const char *s, int eno)
+{
+  printf("%s: %s\n", s, strerror(eno));
+}
+
+static int rtems_shell_main_cmdchown(int argc, char **argv)
+{
+  if (argc >= 2) {
+    const char *s = argv[1];
+    unsigned new_uid = UINT_MAX;
+    unsigned new_gid = UINT_MAX;
+    bool change_uid = false;
+    bool change_gid = false;
+    uid_t task_uid;
+    int i;
+
+    if (strcmp(s, ":") != 0) {
+      int n = sscanf(argv[1], "%u:%u", &new_uid, &new_gid);
+
+      if (n == 2) {
+        change_uid = true;
+        change_gid = true;
+      } else if (n == 1) {
+        change_uid = true;
+      } else {
+        n = sscanf(argv[1], ":%u", &new_gid);
+
+        if (n == 1) {
+          change_gid = true;
+        } else {
+          return usage();
+        }
+      }
+    }
+
+    task_uid = getuid();
+
+    for (i = 2; i < argc; ++i) {
+      const char *cmd = argv[i];
+      rtems_shell_cmd_t *shell_cmd = rtems_shell_lookup_cmd(cmd);
+
+      if (shell_cmd != NULL) {
+        if (task_uid == 0 || task_uid == shell_cmd->uid) {
+          if (change_uid) {
+            shell_cmd->uid = new_uid;
+          }
+
+          if (change_gid) {
+            shell_cmd->gid = new_gid;
+          }
+        } else if (rtems_shell_can_see_cmd(shell_cmd)) {
+          error(cmd, EACCES);
+        } else {
+          error(cmd, ENOENT);
+        }
+      } else {
+        error(cmd, ENOENT);
+      }
+    }
+  } else {
+    return usage();
+  }
+
+  return 0;
+}
+
+rtems_shell_cmd_t rtems_shell_CMDCHOWN_Command = {
+  .name = "cmdchown",
+  .usage = "cmdchown [OWNER][:[GROUP]] COMMAND...",
+  .topic = "misc",
+  .command = rtems_shell_main_cmdchown
+};