1 files changed, 62 insertions, 0 deletions
diff --git a/nss/getpw.c b/nss/getpw.c
new file mode 100644
index 0000000000..cf747374b8
--- /dev/null
+++ b/nss/getpw.c
@@ -0,0 +1,62 @@
+/* Copyright (C) 1991-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <alloca.h>
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <pwd.h>
+
+
+/* Re-construct the password-file line for the given uid
+   in the given buffer.  This knows the format that the caller
+   will expect, but this need not be the format of the password file.  */
+
+int __getpw (__uid_t uid, char *buf);
+
+int
+__getpw (__uid_t uid, char *buf)
+{
+  size_t buflen;
+  char *tmpbuf;
+  struct passwd resbuf, *p;
+
+  if (buf == NULL)
+    {
+      __set_errno (EINVAL);
+      return -1;
+    }
+
+  buflen = __sysconf (_SC_GETPW_R_SIZE_MAX);
+  tmpbuf = alloca (buflen);
+
+  if (__getpwuid_r (uid, &resbuf, tmpbuf, buflen, &p) != 0)
+    return -1;
+
+  if (p == NULL)
+    return -1;
+
+  if (sprintf (buf, "%s:%s:%lu:%lu:%s:%s:%s", p->pw_name, p->pw_passwd,
+	       (unsigned long int) p->pw_uid, (unsigned long int) p->pw_gid,
+	       p->pw_gecos, p->pw_dir, p->pw_shell) < 0)
+    return -1;
+
+  return 0;
+}
+weak_alias (__getpw, getpw)
+
+link_warning (getpw, "the `getpw' function is dangerous and should not be used.")