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 <ctype.h>
      19  #include <errno.h>
      20  #include <stdio.h>
      21  #include <pwd.h>
      22  
      23  /* Define a line parsing function using the common code
      24     used in the nss_files module.  */
      25  
      26  #define STRUCTURE	passwd
      27  #define ENTNAME		pwent
      28  struct pwent_data {};
      29  
      30  #include <nss/nss_files/files-parse.c>
      31  LINE_PARSER
      32  (,
      33   STRING_FIELD (result->pw_name, ISCOLON, 0);
      34   if (line[0] == '\0'
      35       && (result->pw_name[0] == '+' || result->pw_name[0] == '-'))
      36     {
      37       /* This a special case.  We allow lines containing only a `+' sign
      38  	since this is used for nss_compat.  All other services will
      39  	reject this entry later.  Initialize all other fields now.  */
      40       result->pw_passwd = NULL;
      41       result->pw_uid = 0;
      42       result->pw_gid = 0;
      43       result->pw_gecos = NULL;
      44       result->pw_dir = NULL;
      45       result->pw_shell = NULL;
      46     }
      47   else
      48     {
      49       STRING_FIELD (result->pw_passwd, ISCOLON, 0);
      50       if (result->pw_name[0] == '+' || result->pw_name[0] == '-')
      51         {
      52  	 INT_FIELD_MAYBE_NULL (result->pw_uid, ISCOLON, 0, 10, , 0)
      53  	 INT_FIELD_MAYBE_NULL (result->pw_gid, ISCOLON, 0, 10, , 0)
      54         }
      55       else
      56         {
      57  	 INT_FIELD (result->pw_uid, ISCOLON, 0, 10,)
      58  	 INT_FIELD (result->pw_gid, ISCOLON, 0, 10,)
      59         }
      60       STRING_FIELD (result->pw_gecos, ISCOLON, 0);
      61       STRING_FIELD (result->pw_dir, ISCOLON, 0);
      62       result->pw_shell = line;
      63     }
      64   )
      65  
      66  
      67  /* Read one entry from the given stream.  */
      68  int
      69  __fgetpwent_r (FILE *stream, struct passwd *resbuf, char *buffer,
      70  	       size_t buflen, struct passwd **result)
      71  {
      72    int ret = __nss_fgetent_r (stream, resbuf, buffer, buflen, parse_line);
      73    if (ret == 0)
      74      *result = resbuf;
      75    else
      76      *result = NULL;
      77    return ret;
      78  }
      79  weak_alias (__fgetpwent_r, fgetpwent_r)