glibc/pwd/pwd.h

/* Copyright (C) 1991,92,95,96,97,98,99,2001 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

/*
 *	POSIX Standard: 9.2.2 User Database Access	<pwd.h>
 */

#ifndef	_PWD_H
#define	_PWD_H	1

#include <features.h>

__BEGIN_DECLS

#include <bits/types.h>

#define __need_size_t
#include <stddef.h>

#ifdef __USE_XOPEN
/* The Single Unix specification says that some more types are
   available here.  */
# ifndef __gid_t_defined
typedef __gid_t gid_t;
#  define __gid_t_defined
# endif

# ifndef __uid_t_defined
typedef __uid_t uid_t;
#  define __uid_t_defined
# endif
#endif

/* The passwd structure.  */
struct passwd
{
  char *pw_name;		/* Username.  */
  char *pw_passwd;		/* Password.  */
  __uid_t pw_uid;		/* User ID.  */
  __gid_t pw_gid;		/* Group ID.  */
  char *pw_gecos;		/* Real name.  */
  char *pw_dir;			/* Home directory.  */
  char *pw_shell;		/* Shell program.  */
};


#if defined __USE_SVID || defined __USE_GNU
# define __need_FILE
# include <stdio.h>
#endif


#if defined __USE_SVID || defined __USE_MISC || defined __USE_XOPEN_EXTENDED
/* Rewind the password-file stream.  */
extern void setpwent (void) __THROW;

/* Close the password-file stream.  */
extern void endpwent (void) __THROW;

/* Read an entry from the password-file stream, opening it if necessary.  */
extern struct passwd *getpwent (void) __THROW;
#endif

#ifdef	__USE_SVID
/* Read an entry from STREAM.  */
extern struct passwd *fgetpwent (FILE *__stream) __THROW;

/* Write the given entry onto the given stream.  */
extern int putpwent (__const struct passwd *__restrict __p,
		     FILE *__restrict __f) __THROW;
#endif

/* Search for an entry with a matching user ID.  */
extern struct passwd *getpwuid (__uid_t __uid) __THROW;

/* Search for an entry with a matching username.  */
extern struct passwd *getpwnam (__const char *__name) __THROW;

#if defined __USE_POSIX || defined __USE_MISC

# ifdef __USE_MISC
/* Reasonable value for the buffer sized used in the reentrant
   functions below.  But better use `sysconf'.  */
#  define NSS_BUFLEN_PASSWD	1024
# endif

/* Reentrant versions of some of the functions above.

   PLEASE NOTE: the `getpwent_r' function is not (yet) standardized.
   The interface may change in later versions of this library.  But
   the interface is designed following the principals used for the
   other reentrant functions so the chances are good this is what the
   POSIX people would choose.  */

# if defined __USE_SVID || defined __USE_MISC
extern int getpwent_r (struct passwd *__restrict __resultbuf,
		       char *__restrict __buffer, size_t __buflen,
		       struct passwd **__restrict __result) __THROW;
# endif

extern int getpwuid_r (__uid_t __uid,
		       struct passwd *__restrict __resultbuf,
		       char *__restrict __buffer, size_t __buflen,
		       struct passwd **__restrict __result) __THROW;

extern int getpwnam_r (__const char *__restrict __name,
		       struct passwd *__restrict __resultbuf,
		       char *__restrict __buffer, size_t __buflen,
		       struct passwd **__restrict __result) __THROW;


# ifdef	__USE_SVID
/* Read an entry from STREAM.  This function is not standardized and
   probably never will.  */
extern int fgetpwent_r (FILE *__restrict __stream,
			struct passwd *__restrict __resultbuf,
			char *__restrict __buffer, size_t __buflen,
			struct passwd **__restrict __result) __THROW;
# endif

#endif	/* POSIX or reentrant */

#ifdef __USE_GNU
/* Re-construct the password-file line for the given uid
   in the given buffer.  This knows the format that the caller
   will expect, but this need not be the format of the password file.  */
extern int getpw (__uid_t __uid, char *__buffer) __THROW;
#endif

__END_DECLS

#endif /* pwd.h  */