shadow/shadow.h

   1 /* Copyright (C) 1996-2017 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    <http://www.gnu.org/licenses/>.  */
  17
  18 /* Declaration of types and functions for shadow password suite.  */
  19
  20 #ifndef _SHADOW_H
  21 #define _SHADOW_H       1
  22
  23 #include <features.h>
  24
  25 #include <paths.h>
  26
  27 #define __need_size_t
  28 #include <stddef.h>
  29
  30 #include <bits/types/FILE.h>
  31
  32 /* Paths to the user database files.  */
  33 #define SHADOW _PATH_SHADOW
  34
  35
  36 __BEGIN_DECLS
  37
  38 /* Structure of the password file.  */
  39 struct spwd
  40   {
  41     char *sp_namp;              /* Login name.  */
  42     char *sp_pwdp;              /* Encrypted password.  */
  43     long int sp_lstchg;         /* Date of last change.  */
  44     long int sp_min;            /* Minimum number of days between changes.  */
  45     long int sp_max;            /* Maximum number of days between changes.  */
  46     long int sp_warn;           /* Number of days to warn user to change
  47                                    the password.  */
  48     long int sp_inact;          /* Number of days the account may be
  49                                    inactive.  */
  50     long int sp_expire;         /* Number of days since 1970-01-01 until
  51                                    account expires.  */
  52     unsigned long int sp_flag;  /* Reserved.  */
  53   };
  54
  55
  56 /* Open database for reading.
  57
  58    This function is not part of POSIX and therefore no official
  59    cancellation point.  But due to similarity with an POSIX interface
  60    or due to the implementation it is a cancellation point and
  61    therefore not marked with __THROW.  */
  62 extern void setspent (void);
  63
  64 /* Close database.
  65
  66    This function is not part of POSIX and therefore no official
  67    cancellation point.  But due to similarity with an POSIX interface
  68    or due to the implementation it is a cancellation point and
  69    therefore not marked with __THROW.  */
  70 extern void endspent (void);
  71
  72 /* Get next entry from database, perhaps after opening the file.
  73
  74    This function is not part of POSIX and therefore no official
  75    cancellation point.  But due to similarity with an POSIX interface
  76    or due to the implementation it is a cancellation point and
  77    therefore not marked with __THROW.  */
  78 extern struct spwd *getspent (void);
  79
  80 /* Get shadow entry matching NAME.
  81
  82    This function is not part of POSIX and therefore no official
  83    cancellation point.  But due to similarity with an POSIX interface
  84    or due to the implementation it is a cancellation point and
  85    therefore not marked with __THROW.  */
  86 extern struct spwd *getspnam (const char *__name);
  87
  88 /* Read shadow entry from STRING.
  89
  90    This function is not part of POSIX and therefore no official
  91    cancellation point.  But due to similarity with an POSIX interface
  92    or due to the implementation it is a cancellation point and
  93    therefore not marked with __THROW.  */
  94 extern struct spwd *sgetspent (const char *__string);
  95
  96 /* Read next shadow entry from STREAM.
  97
  98    This function is not part of POSIX and therefore no official
  99    cancellation point.  But due to similarity with an POSIX interface
 100    or due to the implementation it is a cancellation point and
 101    therefore not marked with __THROW.  */
 102 extern struct spwd *fgetspent (FILE *__stream);
 103
 104 /* Write line containing shadow password entry to stream.
 105
 106    This function is not part of POSIX and therefore no official
 107    cancellation point.  But due to similarity with an POSIX interface
 108    or due to the implementation it is a cancellation point and
 109    therefore not marked with __THROW.  */
 110 extern int putspent (const struct spwd *__p, FILE *__stream);
 111
 112
 113 #ifdef __USE_MISC
 114 /* Reentrant versions of some of the functions above.
 115
 116    These functions are not part of POSIX and therefore no official
 117    cancellation point.  But due to similarity with an POSIX interface
 118    or due to the implementation they are cancellation points and
 119    therefore not marked with __THROW.  */
 120 extern int getspent_r (struct spwd *__result_buf, char *__buffer,
 121                        size_t __buflen, struct spwd **__result);
 122
 123 extern int getspnam_r (const char *__name, struct spwd *__result_buf,
 124                        char *__buffer, size_t __buflen,
 125                        struct spwd **__result);
 126
 127 extern int sgetspent_r (const char *__string, struct spwd *__result_buf,
 128                         char *__buffer, size_t __buflen,
 129                         struct spwd **__result);
 130
 131 extern int fgetspent_r (FILE *__stream, struct spwd *__result_buf,
 132                         char *__buffer, size_t __buflen,
 133                         struct spwd **__result);
 134 #endif  /* misc */
 135
 136
 137 /* The simple locking functionality provided here is not suitable for
 138    multi-threaded applications.  */
 139
 140 /* Protect password file against multi writers.  */
 141 extern int lckpwdf (void) __THROW;
 142
 143 /* Unlock password file.  */
 144 extern int ulckpwdf (void) __THROW;
 145
 146 __END_DECLS
 147
 148 #endif /* shadow.h */