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Add fexecve() and map O_EXEC to O_PATH on Linux

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Justine Tunney 2022-10-02 08:30:39 -07:00
parent 6c60793f3a
commit acd8900071
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9 changed files with 161 additions and 5 deletions
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test/libc/calls/fexecve_test.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/dce.h"
#include "libc/runtime/runtime.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
#include "libc/testlib/subprocess.h"
#include "libc/testlib/testlib.h"
int fds[2];
char buf[8];
char testlib_enable_tmp_setup_teardown;
TEST(execve, elfIsUnreadable_mayBeExecuted) {
if (IsWindows() || IsXnu()) return;
testlib_extract("/zip/echo", "echo", 0111);
ASSERT_SYS(0, 0, pipe2(fds, O_CLOEXEC));
SPAWN(vfork);
ASSERT_SYS(0, 1, dup2(4, 1));
ASSERT_SYS(
0, 0,
execve("echo", (char *const[]){"echo", "hi", 0}, (char *const[]){0}));
notpossible;
EXITS(0);
bzero(buf, 8);
ASSERT_SYS(0, 0, close(4));
ASSERT_SYS(0, 3, read(3, buf, 7));
ASSERT_SYS(0, 0, close(3));
ASSERT_STREQ("hi\n", buf);
}
TEST(fexecve, elfIsUnreadable_mayBeExecuted) {
if (!IsLinux() && !IsFreebsd()) return;
testlib_extract("/zip/echo", "echo", 0111);
ASSERT_SYS(0, 0, pipe2(fds, O_CLOEXEC));
SPAWN(vfork);
ASSERT_SYS(0, 1, dup2(4, 1));
ASSERT_SYS(0, 5, open("echo", O_EXEC | O_CLOEXEC));
if (IsFreebsd()) ASSERT_SYS(0, 1, lseek(5, 1, SEEK_SET));
ASSERT_SYS(0, 0,
fexecve(5, (char *const[]){"echo", "hi", 0}, (char *const[]){0}));
notpossible;
EXITS(0);
bzero(buf, 8);
ASSERT_SYS(0, 0, close(4));
ASSERT_SYS(0, 3, read(3, buf, 7));
ASSERT_SYS(0, 0, close(3));
ASSERT_STREQ("hi\n", buf);
}