mirror of
https://github.com/jart/cosmopolitan.git
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f2af97711b
- Improve compatibility with Blink virtual machine - Add non-POSIX APIs for joining threads and signal masks - Never ever use anything except 32-bit integers for atomics - Add some `#undef` statements to workaround `ctags` problems
63 lines
3.2 KiB
C
63 lines
3.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/str/str.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Executes binary executable at file descriptor.
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*
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* This is only supported on Linux and FreeBSD. APE binaries currently
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* aren't supported.
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*
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* @param fd is opened executable and current file position is ignored
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* @return doesn't return on success, otherwise -1 w/ errno
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* @raise ENOEXEC if file at `fd` isn't an assimilated ELF executable
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* @raise ENOSYS on Windows, XNU, OpenBSD, NetBSD, and Metal
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*/
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int fexecve(int fd, char *const argv[], char *const envp[]) {
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int rc;
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size_t i;
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if (!argv || !envp ||
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(IsAsan() &&
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(!__asan_is_valid_strlist(argv) || !__asan_is_valid_strlist(envp)))) {
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rc = efault();
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} else {
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STRACE("fexecve(%d, %s, %s) → ...", fd, DescribeStringList(argv),
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DescribeStringList(envp));
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if (IsLinux()) {
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char path[14 + 12];
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FormatInt32(stpcpy(path, "/proc/self/fd/"), fd);
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rc = __sys_execve(path, argv, envp);
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} else if (IsFreebsd()) {
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rc = sys_fexecve(fd, argv, envp);
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} else {
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rc = enosys();
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}
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}
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STRACE("fexecve(%d) failed %d% m", fd, rc);
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return rc;
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}
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