pwd/pwd.h

   1 /* Copyright (C) 1991, 1992, 1995, 1996 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 /*
  20  *      POSIX Standard: 9.2.2 User Database Access      <pwd.h>
  21  */
  22
  23 #ifndef _PWD_H
  24
  25 #define _PWD_H  1
  26 #include <features.h>
  27
  28 __BEGIN_DECLS
  29
  30 #include <gnu/types.h>
  31
  32
  33 /* The passwd structure.  */
  34 struct passwd
  35 {
  36   char *pw_name;                /* Username.  */
  37   char *pw_passwd;              /* Password.  */
  38   __uid_t pw_uid;               /* User ID.  */
  39   __gid_t pw_gid;               /* Group ID.  */
  40   char *pw_gecos;               /* Real name.  */
  41   char *pw_dir;                 /* Home directory.  */
  42   char *pw_shell;               /* Shell program.  */
  43 };
  44
  45
  46 #if defined(__USE_SVID) || defined(__USE_GNU)
  47 #define __need_FILE
  48 #include <stdio.h>
  49 #endif
  50
  51 #ifdef  __USE_GNU
  52 /* Return a new stream open on the password file.  */
  53 extern FILE *__pwdopen __P ((void));
  54
  55 /* Read a password entry from STREAM, filling in P.
  56    Return the `struct passwd' of P if successful, NULL on failure.  */
  57 extern struct passwd *__pwdread __P ((FILE * __stream, __ptr_t __p));
  58
  59 /* Return a chunk of memory containing pre-initialized data for __pwdread.  */
  60 extern __ptr_t __pwdalloc __P ((void));
  61
  62 /* Scan the password file, filling in P, until SELECTOR returns nonzero for
  63    an entry.  Return the `struct passwd' of P if successful, NULL on
  64    failure.  */
  65 extern struct passwd *__pwdscan __P ((__ptr_t *__p,
  66                                       int (*__selector) (struct passwd *)));
  67 #endif
  68
  69
  70 #if defined(__USE_SVID) || defined(__USE_MISC)
  71 /* Rewind the password-file stream.  */
  72 extern void setpwent __P ((void));
  73
  74 /* Close the password-file stream.  */
  75 extern void endpwent __P ((void));
  76
  77 /* Read an entry from the password-file stream, opening it if necessary.  */
  78 extern struct passwd *getpwent __P ((void));
  79 #endif
  80
  81 #ifdef  __USE_SVID
  82 /* Read an entry from STREAM.  */
  83 extern struct passwd *fgetpwent __P ((FILE * __stream));
  84
  85 /* Write the given entry onto the given stream.  */
  86 extern int putpwent __P ((__const struct passwd * __p, FILE * __f));
  87 #endif
  88
  89 /* Search for an entry with a matching user ID.  */
  90 extern struct passwd *getpwuid __P ((__uid_t __uid));
  91
  92 /* Search for an entry with a matching username.  */
  93 extern struct passwd *getpwnam __P ((__const char *__name));
  94
  95 #ifdef  __USE_REENTRANT
  96 /* Reasonable value for the buffer sized used in the reentrant
  97    functions below.  But better use `sysconf'.  */
  98 #define NSS_BUFLEN_PASSWD       1024
  99
 100 /* Reentrant versions of some of the functions above.
 101
 102    PLEASE NOTE: these functions are not yet standardized.  The interface
 103    may change in later versions of this library.  */
 104
 105 #if defined(__USE_SVID) || defined(__USE_MISC)
 106 extern struct passwd *__getpwent_r __P ((struct passwd *__resultbuf,
 107                                          char *__buffer, int __buflen));
 108 extern struct passwd *getpwent_r __P ((struct passwd *__resultbuf,
 109                                        char *__buffer, int __buflen));
 110 #endif
 111
 112 extern struct passwd *__getpwuid_r __P ((__uid_t __uid,
 113                                          struct passwd *__resultbuf,
 114                                          char *__buffer, int __buflen));
 115 extern struct passwd *getpwuid_r __P ((__uid_t __uid,
 116                                        struct passwd *__resultbuf,
 117                                        char *__buffer, int __buflen));
 118
 119 extern struct passwd *__getpwnam_r __P ((__const char *__name,
 120                                          struct passwd *__resultbuf,
 121                                          char *__buffer, int __buflen));
 122 extern struct passwd *getpwnam_r __P ((__const char *__name,
 123                                        struct passwd *__resultbuf,
 124                                        char *__buffer, int __buflen));
 125
 126
 127 #ifdef  __USE_SVID
 128 /* Read an entry from STREAM.  */
 129 extern struct passwd *__fgetpwent_r __P ((FILE * __stream,
 130                                           struct passwd *__resultbuf,
 131                                           char *__buffer, int __buflen));
 132 extern struct passwd *fgetpwent_r __P ((FILE * __stream,
 133                                         struct passwd *__resultbuf,
 134                                         char *__buffer, int __buflen));
 135 #endif
 136
 137 #endif  /* reentrant */
 138
 139
 140 __END_DECLS
 141
 142 #endif /* pwd.h  */