pwd/pwd.h

   1 /* Copyright (C) 1991, 92, 95, 96, 97, 98, 99 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 not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /*
  20  *      POSIX Standard: 9.2.2 User Database Access      <pwd.h>
  21  */
  22
  23 #ifndef _PWD_H
  24 #define _PWD_H  1
  25
  26 #include <features.h>
  27
  28 __BEGIN_DECLS
  29
  30 #include <bits/types.h>
  31
  32 #define __need_size_t
  33 #include <stddef.h>
  34
  35 #ifdef __USE_XOPEN
  36 /* The Single Unix specification says that some more types are
  37    available here.  */
  38 # ifndef __gid_t_defined
  39 typedef __gid_t gid_t;
  40 #  define __gid_t_defined
  41 # endif
  42
  43 # ifndef __uid_t_defined
  44 typedef __uid_t uid_t;
  45 #  define __uid_t_defined
  46 # endif
  47 #endif
  48
  49 /* The passwd structure.  */
  50 struct passwd
  51 {
  52   char *pw_name;                /* Username.  */
  53   char *pw_passwd;              /* Password.  */
  54   __uid_t pw_uid;               /* User ID.  */
  55   __gid_t pw_gid;               /* Group ID.  */
  56   char *pw_gecos;               /* Real name.  */
  57   char *pw_dir;                 /* Home directory.  */
  58   char *pw_shell;               /* Shell program.  */
  59 };
  60
  61
  62 #if defined __USE_SVID || defined __USE_GNU
  63 # define __need_FILE
  64 # include <stdio.h>
  65 #endif
  66
  67
  68 #if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN_EXTENDED
  69 /* Rewind the password-file stream.  */
  70 extern void setpwent (void) __THROW;
  71
  72 /* Close the password-file stream.  */
  73 extern void endpwent (void) __THROW;
  74
  75 /* Read an entry from the password-file stream, opening it if necessary.  */
  76 extern struct passwd *getpwent (void) __THROW;
  77 #endif
  78
  79 #ifdef  __USE_SVID
  80 /* Read an entry from STREAM.  */
  81 extern struct passwd *fgetpwent (FILE *__stream) __THROW;
  82
  83 /* Write the given entry onto the given stream.  */
  84 extern int putpwent (__const struct passwd *__restrict __p,
  85                      FILE *__restrict __f) __THROW;
  86 #endif
  87
  88 /* Search for an entry with a matching user ID.  */
  89 extern struct passwd *getpwuid (__uid_t __uid) __THROW;
  90
  91 /* Search for an entry with a matching username.  */
  92 extern struct passwd *getpwnam (__const char *__name) __THROW;
  93
  94 #if defined __USE_POSIX || defined __USE_MISC
  95
  96 # ifdef __USE_MISC
  97 /* Reasonable value for the buffer sized used in the reentrant
  98    functions below.  But better use `sysconf'.  */
  99 #  define NSS_BUFLEN_PASSWD     1024
 100 # endif
 101
 102 /* Reentrant versions of some of the functions above.
 103
 104    PLEASE NOTE: the `getpwent_r' function is not (yet) standardized.
 105    The interface may change in later versions of this library.  But
 106    the interface is designed following the principals used for the
 107    other reentrant functions so the chances are good this is what the
 108    POSIX people would choose.  */
 109
 110 # if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN_EXTENDED
 111 extern int getpwent_r (struct passwd *__restrict __resultbuf,
 112                        char *__restrict __buffer, size_t __buflen,
 113                        struct passwd **__restrict __result) __THROW;
 114 # endif
 115
 116 extern int getpwuid_r (__uid_t __uid,
 117                        struct passwd *__restrict __resultbuf,
 118                        char *__restrict __buffer, size_t __buflen,
 119                        struct passwd **__restrict __result) __THROW;
 120
 121 extern int getpwnam_r (__const char *__restrict __name,
 122                        struct passwd *__restrict __resultbuf,
 123                        char *__restrict __buffer, size_t __buflen,
 124                        struct passwd **__restrict __result) __THROW;
 125
 126
 127 # ifdef __USE_SVID
 128 /* Read an entry from STREAM.  This function is not standardized and
 129    probably never will.  */
 130 extern int fgetpwent_r (FILE *__restrict __stream,
 131                         struct passwd *__restrict __resultbuf,
 132                         char *__restrict __buffer, size_t __buflen,
 133                         struct passwd **__restrict __result) __THROW;
 134 # endif
 135
 136 #endif  /* POSIX or reentrant */
 137
 138 #ifdef __USE_GNU
 139 /* Re-construct the password-file line for the given uid
 140    in the given buffer.  This knows the format that the caller
 141    will expect, but this need not be the format of the password file.  */
 142 extern int getpw (__uid_t __uid, char *__buffer) __THROW;
 143 #endif
 144
 145 __END_DECLS
 146
 147 #endif /* pwd.h  */