vasilito
068a1ca63e
Bootloader fork rebase:
- Base changed from 0.1.0 pre-patched archive to upstream 1.0.0 tag (c7eeb9f)
- Applied 0001-redbear-local-forks.patch (Cargo.toml crate path redirects)
- Applied fix-uefi-alloc-panic.patch equivalents (4 panic!() -> graceful
error handling in src/main.rs)
- Applied P5-live-preload-cap-1gib.patch (1 GiB cap on live image preload)
- Skipped: P0 GPT partition scan (requires new module + integration),
P1 timeout/default-resolution, P2 live preload guard (subsumed by
panic fixes + cap), P3 live image safe read, P4 large ISO boot,
redox.patch — to be applied in dedicated rebase session.
firmware-loader/Cargo.toml: version 0.1.0 -> 0.3.0 (sync with other
Red Bear custom crates which are at 0.3.0).
fork-upstream-map.toml: bootloader back from PENDING_REBASE to 1.0.0
since the partial rebase matches upstream 1.0.0 content.
fork-upstream-map.toml: base restored to 'main' tracked (was correctly
tracked by build-redbear.sh).
156 lines
3.8 KiB
C
156 lines
3.8 KiB
C
/* Copyright (C) 1992, 1995-2002, 2005-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file 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
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
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optimizes away the name == NULL test below. */
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#define _GL_ARG_NONNULL(params)
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#include <config.h>
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/* Specification. */
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#include <stdlib.h>
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#include <errno.h>
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#if !_LIBC
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# define __set_errno(ev) ((errno) = (ev))
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#endif
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#include <string.h>
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#include <unistd.h>
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#if !_LIBC
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# define __environ environ
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#endif
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#if _LIBC
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/* This lock protects against simultaneous modifications of 'environ'. */
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# include <bits/libc-lock.h>
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__libc_lock_define_initialized (static, envlock)
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# define LOCK __libc_lock_lock (envlock)
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# define UNLOCK __libc_lock_unlock (envlock)
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#else
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# define LOCK
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# define UNLOCK
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#endif
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/* In the GNU C library we must keep the namespace clean. */
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#ifdef _LIBC
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# define unsetenv __unsetenv
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#endif
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#if _LIBC || !HAVE_UNSETENV
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int
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unsetenv (const char *name)
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{
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size_t len;
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if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
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{
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__set_errno (EINVAL);
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return -1;
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}
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len = strlen (name);
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#if HAVE_DECL__PUTENV /* native Windows */
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/* The Microsoft documentation
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<https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/putenv-wputenv>
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says:
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"Don't change an environment entry directly: instead,
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use _putenv or _wputenv to change it."
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Note: Microsoft's _putenv updates not only the contents of _environ but
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also the contents of _wenviron, so that both are in kept in sync.
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The way to remove an environment variable is to pass to _putenv a string
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of the form "NAME=". (NB: This is a different convention than with glibc
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putenv, which expects a string of the form "NAME"!) */
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{
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int putenv_result;
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char *name_ = malloc (len + 2);
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if (name_ == NULL)
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return -1;
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memcpy (name_, name, len);
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name_[len] = '=';
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name_[len + 1] = 0;
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putenv_result = _putenv (name_);
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/* In this particular case it is OK to free() the argument passed to
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_putenv. */
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free (name_);
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return putenv_result;
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}
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#else
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LOCK;
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char **ep = __environ;
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while (*ep != NULL)
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if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
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{
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/* Found it. Remove this pointer by moving later ones back. */
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char **dp = ep;
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do
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dp[0] = dp[1];
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while (*dp++);
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/* Continue the loop in case NAME appears again. */
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}
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else
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++ep;
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UNLOCK;
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return 0;
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#endif
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}
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#ifdef _LIBC
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# undef unsetenv
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weak_alias (__unsetenv, unsetenv)
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#endif
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#else /* HAVE_UNSETENV */
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# undef unsetenv
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# if !HAVE_DECL_UNSETENV
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# if VOID_UNSETENV
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extern void unsetenv (const char *);
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# else
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extern int unsetenv (const char *);
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# endif
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# endif
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/* Call the underlying unsetenv, in case there is hidden bookkeeping
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that needs updating beyond just modifying environ. */
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int
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rpl_unsetenv (const char *name)
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{
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int result = 0;
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if (!name || !*name || strchr (name, '='))
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{
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errno = EINVAL;
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return -1;
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}
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while (getenv (name))
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# if !VOID_UNSETENV
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result =
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# endif
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unsetenv (name);
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return result;
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}
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#endif /* HAVE_UNSETENV */
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