libs/libc/pwd: add new member to passwd struct

Add pw_passwd member to pass tlpi example:
https://man7.org/tlpi/code/online/dist/users_groups/check_password.c.html

Signed-off-by: chenzhijia <chenzhijia@xiaomi.com>

Author: chenzhijia

include/pwd.h

@@ -49,6 +49,7 @@
 struct passwd
 {
   FAR char *pw_name;
+  FAR char *pw_passwd;
   uid_t     pw_uid;
   gid_t     pw_gid;
   FAR char *pw_gecos;

libs/libc/pwd/lib_find_pwdfile.c

@@ -289,6 +289,7 @@ static int pwd_foreach(pwd_foreach_match_t match, uintptr_t arg,
 
       *ptr++ = '\0';
       entry->pw_shell = ROOT_SHELL;
+      entry->pw_passwd = ROOT_PASSWD;
 
       /* Check for a match */
 

libs/libc/pwd/lib_getpwbuf.c

@@ -57,10 +57,10 @@
 
 FAR struct passwd *getpwbuf(uid_t uid, gid_t gid, FAR const char *name,
                             FAR const char *gecos, FAR const char *dir,
-                            FAR const char *shell)
+                            FAR const char *shell, FAR const char *passwd)
 {
   FAR struct passwd *pwd = NULL;
-  int ret = getpwbuf_r(uid, gid, name, gecos, dir, shell, &g_passwd,
+  int ret = getpwbuf_r(uid, gid, name, gecos, dir, shell, passwd, &g_passwd,
                        g_passwd_buffer, sizeof(g_passwd_buffer), &pwd);
   return ret == 0 ? pwd : NULL;
 }

libs/libc/pwd/lib_getpwbufr.c

@@ -67,20 +67,23 @@
 
 int getpwbuf_r(uid_t uid, gid_t gid, FAR const char *name,
                FAR const char *gecos, FAR const char *dir,
-               FAR const char *shell, FAR struct passwd *pwd,
-               FAR char *buf, size_t buflen, FAR struct passwd **result)
+               FAR const char *shell, FAR const char *passwd,
+               FAR struct passwd *pwd, FAR char *buf, size_t buflen,
+               FAR struct passwd **result)
 {
   size_t reqdlen;
   size_t nsize;
   size_t gsize;
   size_t dsize;
   size_t ssize;
+  size_t psize;
 
   nsize = strlen(name) + 1;
   gsize = strlen(gecos) + 1;
   dsize = strlen(dir) + 1;
   ssize = strlen(shell) + 1;
-  reqdlen = nsize + gsize + dsize + ssize;
+  psize = strlen(passwd) + 1;
+  reqdlen = nsize + gsize + dsize + ssize + psize;
 
   if (buflen < reqdlen)
     {
@@ -90,17 +93,19 @@ int getpwbuf_r(uid_t uid, gid_t gid, FAR const char *name,
       return ERANGE;
     }
 
-  pwd->pw_name  = buf;
-  pwd->pw_gecos = &buf[nsize];
-  pwd->pw_dir   = &buf[nsize + gsize];
-  pwd->pw_shell = &buf[nsize + gsize + dsize];
+  pwd->pw_name   = buf;
+  pwd->pw_gecos  = &buf[nsize];
+  pwd->pw_dir    = &buf[nsize + gsize];
+  pwd->pw_shell  = &buf[nsize + gsize + dsize];
+  pwd->pw_passwd = &buf[nsize + gsize + dsize + ssize];
 
   pwd->pw_uid = uid;
   pwd->pw_gid = gid;
   strlcpy(pwd->pw_name, name, nsize);
   strlcpy(pwd->pw_gecos, gecos, gsize);
   strlcpy(pwd->pw_dir, dir, dsize);
   strlcpy(pwd->pw_shell, shell, ssize);
+  strlcpy(pwd->pw_passwd, passwd, psize);
 
   *result = pwd;
   return 0;

libs/libc/pwd/lib_getpwent.c

@@ -156,7 +156,7 @@ int getpwent_r(FAR struct passwd *pwd,
     }
 
   ret = getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_NAME, ROOT_DIR,
-                   ROOT_SHELL, pwd, buf, buflen, result);
+                   ROOT_SHELL, ROOT_PASSWD, pwd, buf, buflen, result);
   if (ret == 0)
     {
       g_passwd_index++;

libs/libc/pwd/lib_getpwnam.c

@@ -74,6 +74,6 @@ FAR struct passwd *getpwnam(FAR const char *name)
     }
 
   return getpwbuf(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_GEOCS, ROOT_DIR,
-                  ROOT_SHELL);
+                  ROOT_SHELL, ROOT_PASSWD);
 #endif
 }

libs/libc/pwd/lib_getpwnamr.c

@@ -85,6 +85,6 @@ int getpwnam_r(FAR const char *name, FAR struct passwd *pwd, FAR char *buf,
     }
 
   return getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_GEOCS, ROOT_DIR,
-                    ROOT_SHELL, pwd, buf, buflen, result);
+                    ROOT_SHELL, ROOT_PASSWD, pwd, buf, buflen, result);
 #endif
 }

libs/libc/pwd/lib_getpwuid.c

@@ -73,6 +73,6 @@ FAR struct passwd *getpwuid(uid_t uid)
     }
 
   return getpwbuf(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_GEOCS, ROOT_DIR,
-                  ROOT_SHELL);
+                  ROOT_SHELL, ROOT_PASSWD);
 #endif
 }

libs/libc/pwd/lib_getpwuidr.c

@@ -84,6 +84,6 @@ int getpwuid_r(uid_t uid, FAR struct passwd *pwd, FAR char *buf,
     }
 
   return getpwbuf_r(ROOT_UID, ROOT_GID, ROOT_NAME, ROOT_GEOCS, ROOT_DIR,
-                    ROOT_SHELL, pwd, buf, buflen, result);
+                    ROOT_SHELL, ROOT_PASSWD, pwd, buf, buflen, result);
 #endif
 }

libs/libc/pwd/lib_pwd.h

@@ -39,12 +39,13 @@
 #  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"
+#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"
+#define ROOT_PASSWD "root"
 
 /****************************************************************************
  * Public Data
@@ -70,11 +71,12 @@ EXTERN char g_passwd_buffer[CONFIG_LIBC_PASSWD_LINESIZE];
 
 FAR struct passwd *getpwbuf(uid_t uid, gid_t gid, FAR const char *name,
                             FAR const char *gecos, FAR const char *dir,
-                            FAR const char *shell);
+                            FAR const char *shell, FAR const char *passwd);
 int getpwbuf_r(uid_t uid, gid_t gid, FAR const char *name,
                FAR const char *gecos, FAR const char *dir,
-               FAR const char *shell, FAR struct passwd *pwd,
-               FAR char *buf, size_t buflen, FAR struct passwd **result);
+               FAR const char *shell, FAR const char *passwd,
+               FAR struct passwd *pwd, FAR char *buf, size_t buflen,
+               FAR struct passwd **result);
 
 #ifdef CONFIG_LIBC_PASSWD_FILE
 int pwd_findby_name(FAR const char *uname, FAR struct passwd *entry,