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194 lines
6.2 KiB
C
194 lines
6.2 KiB
C
/* Copyright (C) 1991-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/*
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* POSIX Standard: 9.2.2 User Database Access <pwd.h>
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*/
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#ifndef _PWD_H
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#define _PWD_H 1
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#include <features.h>
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__BEGIN_DECLS
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#include <bits/types.h>
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#define __need_size_t
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#include <stddef.h>
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#if defined __USE_XOPEN || defined __USE_XOPEN2K
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/* The Single Unix specification says that some more types are
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available here. */
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# ifndef __gid_t_defined
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typedef __gid_t gid_t;
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# define __gid_t_defined
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# endif
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# ifndef __uid_t_defined
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typedef __uid_t uid_t;
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# define __uid_t_defined
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# endif
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#endif
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/* A record in the user database. */
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struct passwd
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{
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char *pw_name; /* Username. */
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char *pw_passwd; /* Hashed passphrase, if shadow database
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not in use (see shadow.h). */
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__uid_t pw_uid; /* User ID. */
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__gid_t pw_gid; /* Group ID. */
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char *pw_gecos; /* Real name. */
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char *pw_dir; /* Home directory. */
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char *pw_shell; /* Shell program. */
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};
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#ifdef __USE_MISC
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# include <bits/types/FILE.h>
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#endif
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#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
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/* Rewind the user database stream.
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This function is a possible cancellation point and therefore not
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marked with __THROW. */
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extern void setpwent (void);
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/* Close the user database stream.
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This function is a possible cancellation point and therefore not
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marked with __THROW. */
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extern void endpwent (void);
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/* Read an entry from the user database stream, opening it if necessary.
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This function is a possible cancellation point and therefore not
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marked with __THROW. */
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extern struct passwd *getpwent (void);
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#endif
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#ifdef __USE_MISC
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/* Read a user database entry from STREAM.
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This function is not part of POSIX and therefore no official
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cancellation point. But due to similarity with an POSIX interface
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or due to the implementation it is a cancellation point and
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therefore not marked with __THROW. */
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extern struct passwd *fgetpwent (FILE *__stream) __nonnull ((1));
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/* Write a given user database entry onto the given stream.
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This function is not part of POSIX and therefore no official
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cancellation point. But due to similarity with an POSIX interface
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or due to the implementation it is a cancellation point and
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therefore not marked with __THROW. */
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extern int putpwent (const struct passwd *__restrict __p,
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FILE *__restrict __f);
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#endif
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/* Retrieve the user database entry for the given user ID.
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This function is a possible cancellation point and therefore not
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marked with __THROW. */
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extern struct passwd *getpwuid (__uid_t __uid);
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/* Retrieve the user database entry for the given username.
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This function is a possible cancellation point and therefore not
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marked with __THROW. */
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extern struct passwd *getpwnam (const char *__name) __nonnull ((1));
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#ifdef __USE_POSIX
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# ifdef __USE_MISC
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/* Reasonable value for the buffer sized used in the reentrant
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functions below. But better use `sysconf'. */
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# define NSS_BUFLEN_PASSWD 1024
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# endif
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/* Reentrant versions of some of the functions above.
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PLEASE NOTE: the `getpwent_r' function is not (yet) standardized.
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The interface may change in later versions of this library. But
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the interface is designed following the principals used for the
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other reentrant functions so the chances are good this is what the
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POSIX people would choose. */
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# ifdef __USE_MISC
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/* This function is not part of POSIX and therefore no official
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cancellation point. But due to similarity with an POSIX interface
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or due to the implementation it is a cancellation point and
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therefore not marked with __THROW. */
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extern int getpwent_r (struct passwd *__restrict __resultbuf,
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char *__restrict __buffer, size_t __buflen,
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struct passwd **__restrict __result)
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__nonnull ((1, 2, 4))
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__attr_access ((__write_only__, 2, 3));
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# endif
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extern int getpwuid_r (__uid_t __uid,
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struct passwd *__restrict __resultbuf,
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char *__restrict __buffer, size_t __buflen,
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struct passwd **__restrict __result)
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__nonnull ((2, 3, 5))
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__attr_access ((__write_only__, 3, 4));
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extern int getpwnam_r (const char *__restrict __name,
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struct passwd *__restrict __resultbuf,
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char *__restrict __buffer, size_t __buflen,
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struct passwd **__restrict __result)
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__nonnull ((1, 2, 3, 5))
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__attr_access ((__write_only__, 3, 4));
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# ifdef __USE_MISC
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/* Read a user database entry from STREAM. This function is not
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standardized and probably never will.
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This function is not part of POSIX and therefore no official
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cancellation point. But due to similarity with an POSIX interface
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or due to the implementation it is a cancellation point and
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therefore not marked with __THROW. */
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extern int fgetpwent_r (FILE *__restrict __stream,
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struct passwd *__restrict __resultbuf,
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char *__restrict __buffer, size_t __buflen,
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struct passwd **__restrict __result)
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__nonnull ((1, 2, 3, 5))
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__attr_access ((__write_only__, 3, 4));
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# endif
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#endif /* POSIX or reentrant */
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#ifdef __USE_GNU
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/* Write a traditional /etc/passwd line, based on the user database
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entry for the given UID, to BUFFER; space for BUFFER must be
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allocated by the caller.
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This function is not part of POSIX and therefore no official
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cancellation point. But due to similarity with an POSIX interface
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or due to the implementation it is a cancellation point and
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therefore not marked with __THROW. */
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extern int getpw (__uid_t __uid, char *__buffer);
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#endif
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__END_DECLS
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#endif /* pwd.h */
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