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9ec31e5727
The __hurd_fail () inline function is the dedicated, idiomatic way of
reporting errors in the Hurd part of glibc. Not only is it more concise
than '{ errno = err; return -1; }', it is since commit
6639cc1002
"hurd: Mark error functions as __COLD" marked with the cold attribute,
telling the compiler that this codepath is unlikely to be executed.
In one case, use __hurd_dfail () over the plain __hurd_fail ().
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230520115531.3911877-1-bugaevc@gmail.com>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/* Reentrant function to return the current login name. Hurd version.
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Copyright (C) 1996-2023 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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#include <errno.h>
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#include <unistd.h>
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#include <hurd.h>
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#include <string.h>
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/* Return at most NAME_LEN characters of the login name of the user in NAME.
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If it cannot be determined or some other error occurred, return the error
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code. Otherwise return 0. */
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int
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__getlogin_r (char *name, size_t name_len)
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{
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string_t login;
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error_t err;
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if (err = __USEPORT (PROC, __proc_getlogin (port, login)))
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return __hurd_fail (err), err;
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size_t len = __strnlen (login, sizeof login - 1) + 1;
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if (len > name_len)
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return __hurd_fail (ERANGE), ERANGE;
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memcpy (name, login, len);
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return 0;
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}
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libc_hidden_def (__getlogin_r)
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weak_alias (__getlogin_r, getlogin_r)
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libc_hidden_weak (getlogin_r)
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