-/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2019 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
-/* Declaration of types and functions for shadow password suite. */
+/* Declaration of types and functions for "shadow" storage of hashed
+ passphrases. The shadow database is like the user database, but is
+ only accessible with special privileges, so that malicious users
+ cannot retrieve everyone else's hashed passphrase to brute-force at
+ their convenience. */
#ifndef _SHADOW_H
#define _SHADOW_H 1
#include <paths.h>
-#define __need_FILE
-#include <stdio.h>
#define __need_size_t
#include <stddef.h>
+#include <bits/types/FILE.h>
+
/* Paths to the user database files. */
#define SHADOW _PATH_SHADOW
__BEGIN_DECLS
-/* Structure of the password file. */
+/* A record in the shadow database. */
struct spwd
{
char *sp_namp; /* Login name. */
- char *sp_pwdp; /* Encrypted password. */
+ char *sp_pwdp; /* Hashed passphrase. */
long int sp_lstchg; /* Date of last change. */
long int sp_min; /* Minimum number of days between changes. */
long int sp_max; /* Maximum number of days between changes. */
};
-/* Open database for reading. */
-extern void setspent __P ((void));
+/* Open database for reading.
-/* Close database. */
-extern void endspent __P ((void));
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern void setspent (void);
-/* Get next entry from database, perhaps after opening the file. */
-extern struct spwd *getspent __P ((void));
+/* Close database.
-/* Get shadow entry matching NAME. */
-extern struct spwd *getspnam __P ((__const char *__name));
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern void endspent (void);
-/* Read shadow entry from STRING. */
-extern struct spwd *sgetspent __P ((__const char *__string));
+/* Get next entry from database, perhaps after opening the file.
-/* Read next shadow entry from STREAM. */
-extern struct spwd *fgetspent __P ((FILE *__stream));
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern struct spwd *getspent (void);
-/* Write line containing shadow password entry to stream. */
-extern int putspent __P ((__const struct spwd *__p, FILE *__stream));
+/* Get shadow entry matching NAME.
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern struct spwd *getspnam (const char *__name);
-#ifdef __USE_MISC
-/* Reentrant versions of some of the functions above. */
-extern int getspent_r __P ((struct spwd *__result_buf, char *__buffer,
- size_t __buflen, struct spwd **__result));
+/* Read shadow entry from STRING.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern struct spwd *sgetspent (const char *__string);
+
+/* Read next shadow entry from STREAM.
+
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern struct spwd *fgetspent (FILE *__stream);
-extern int getspnam_r __P ((__const char *__name, struct spwd *__result_buf,
- char *__buffer, size_t __buflen,
- struct spwd **__result));
+/* Write line containing shadow entry to stream.
-extern int sgetspent_r __P ((__const char *__string, struct spwd *__result_buf,
- char *__buffer, size_t __buflen,
- struct spwd **__result));
+ This function is not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation it is a cancellation point and
+ therefore not marked with __THROW. */
+extern int putspent (const struct spwd *__p, FILE *__stream);
-extern int fgetspent_r __P ((FILE *__stream, struct spwd *__result_buf,
- char *__buffer, size_t __buflen,
- struct spwd **__result));
+
+#ifdef __USE_MISC
+/* Reentrant versions of some of the functions above.
+
+ These functions are not part of POSIX and therefore no official
+ cancellation point. But due to similarity with an POSIX interface
+ or due to the implementation they are cancellation points and
+ therefore not marked with __THROW. */
+extern int getspent_r (struct spwd *__result_buf, char *__buffer,
+ size_t __buflen, struct spwd **__result);
+
+extern int getspnam_r (const char *__name, struct spwd *__result_buf,
+ char *__buffer, size_t __buflen,
+ struct spwd **__result);
+
+extern int sgetspent_r (const char *__string, struct spwd *__result_buf,
+ char *__buffer, size_t __buflen,
+ struct spwd **__result);
+
+extern int fgetspent_r (FILE *__stream, struct spwd *__result_buf,
+ char *__buffer, size_t __buflen,
+ struct spwd **__result);
#endif /* misc */
-/* Protect password file against multi writers. */
-extern int lckpwdf __P ((void));
-/* Unlock password file. */
-extern int ulckpwdf __P ((void));
+/* The simple locking functionality provided here is not suitable for
+ multi-threaded applications. */
+
+/* Request exclusive access to /etc/passwd and /etc/shadow. */
+extern int lckpwdf (void) __THROW;
+
+/* Release exclusive access to /etc/passwd and /etc/shadow. */
+extern int ulckpwdf (void) __THROW;
__END_DECLS
projects / thirdparty / glibc.git / blobdiff