1  /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <nss.h>
      20  #include <stdio.h>
      21  #include <shadow.h>
      22  
      23  #define flockfile(s) _IO_flockfile (s)
      24  #define funlockfile(s) _IO_funlockfile (s)
      25  
      26  #define _S(x)	x ? x : ""
      27  
      28  
      29  /* Write an entry to the given stream.
      30     This must know the format of the password file.  */
      31  int
      32  putspent (const struct spwd *p, FILE *stream)
      33  {
      34    int errors = 0;
      35  
      36    if (p->sp_namp == NULL || !__nss_valid_field (p->sp_namp)
      37        || !__nss_valid_field (p->sp_pwdp))
      38      {
      39        __set_errno (EINVAL);
      40        return -1;
      41      }
      42  
      43    flockfile (stream);
      44  
      45    if (fprintf (stream, "%s:%s:", p->sp_namp, _S (p->sp_pwdp)) < 0)
      46      ++errors;
      47  
      48    if ((p->sp_lstchg != (long int) -1
      49         && fprintf (stream, "%ld:", p->sp_lstchg) < 0)
      50        || (p->sp_lstchg == (long int) -1
      51  	  && putc_unlocked (':', stream) == EOF))
      52      ++errors;
      53  
      54    if ((p->sp_min != (long int) -1
      55         && fprintf (stream, "%ld:", p->sp_min) < 0)
      56        || (p->sp_min == (long int) -1
      57  	  && putc_unlocked (':', stream) == EOF))
      58      ++errors;
      59  
      60    if ((p->sp_max != (long int) -1
      61         && fprintf (stream, "%ld:", p->sp_max) < 0)
      62        || (p->sp_max == (long int) -1
      63  	  && putc_unlocked (':', stream) == EOF))
      64      ++errors;
      65  
      66    if ((p->sp_warn != (long int) -1
      67         && fprintf (stream, "%ld:", p->sp_warn) < 0)
      68        || (p->sp_warn == (long int) -1
      69  	  && putc_unlocked (':', stream) == EOF))
      70      ++errors;
      71  
      72    if ((p->sp_inact != (long int) -1
      73         && fprintf (stream, "%ld:", p->sp_inact) < 0)
      74        || (p->sp_inact == (long int) -1
      75  	  && putc_unlocked (':', stream) == EOF))
      76      ++errors;
      77  
      78    if ((p->sp_expire != (long int) -1
      79         && fprintf (stream, "%ld:", p->sp_expire) < 0)
      80        || (p->sp_expire == (long int) -1
      81  	  && putc_unlocked (':', stream) == EOF))
      82      ++errors;
      83  
      84    if (p->sp_flag != ~0ul
      85        && fprintf (stream, "%ld", p->sp_flag) < 0)
      86      ++errors;
      87  
      88    if (putc_unlocked ('\n', stream) == EOF)
      89      ++errors;
      90  
      91    funlockfile (stream);
      92  
      93    return errors ? -1 : 0;
      94  }