libc/pwd: Correct the geos related comment and ddd ROOT_GEOS macro

fix the minor issue in https://github.com/apache/nuttx/pull/7998

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

libs/libc/pwd/lib_find_pwdfile.c

@@ -133,13 +133,14 @@ static int pwd_foreach(pwd_foreach_match_t match, uintptr_t arg,
    *
    * The format of the password file is:
    *
-   *   user:x:uid:uid:home
+   *   user:x:uid:uid:geos:home
    *
    * Where:
    *   user:  User name
    *   x:     Encrypted password
    *   uid:   User ID
    *   uid:   Group ID
+   *   geos:  User information
    *   home:  Login directory
    */
 

libs/libc/pwd/lib_getpwnam.c

@@ -71,7 +71,7 @@ FAR struct passwd *getpwnam(FAR const char *name)
       return NULL;
     }
 
-  return getpwbuf(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_NAME, ROOT_DIR,
+  return getpwbuf(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_GEOCS, ROOT_DIR,
                   ROOT_SHELL);
 #endif
 }

libs/libc/pwd/lib_getpwnamr.c

@@ -82,7 +82,7 @@ int getpwnam_r(FAR const char *name, FAR struct passwd *pwd, FAR char *buf,
       return 0;
     }
 
-  return getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_NAME, ROOT_DIR,
+  return getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_GEOCS, ROOT_DIR,
                     ROOT_SHELL, pwd, buf, buflen, result);
 #endif
 }

libs/libc/pwd/lib_getpwuid.c

@@ -70,7 +70,7 @@ FAR struct passwd *getpwuid(uid_t uid)
       return NULL;
     }
 
-  return getpwbuf(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_NAME, ROOT_DIR,
+  return getpwbuf(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_GEOCS, ROOT_DIR,
                   ROOT_SHELL);
 #endif
 }

libs/libc/pwd/lib_getpwuidr.c

@@ -81,7 +81,7 @@ int getpwuid_r(uid_t uid, FAR struct passwd *pwd, FAR char *buf,
       return 0;
     }
 
-  return getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_NAME, ROOT_DIR,
+  return getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_GEOCS, ROOT_DIR,
                     ROOT_SHELL, pwd, buf, buflen, result);
 #endif
 }

libs/libc/pwd/lib_pwd.h

@@ -33,9 +33,14 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
+#ifndef CONFIG_LIBC_PASSWD_LINESIZE
+#  define CONFIG_LIBC_PASSWD_LINESIZE 80
+#endif
+
 #define ROOT_NAME  "root"
 #define ROOT_UID   0
 #define ROOT_GID   0
+#define ROOT_GEOCS "root"
 #define ROOT_DIR   "/root"
 #define ROOT_SHELL "/bin/nsh"