mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
1422e96b4e
There's a new program named ape/ape-m1.c which will be used to build an embeddable binary that can load ape and elf executables. The support is mostly working so far, but still chasing down ABI issues.
89 lines
4.1 KiB
C
89 lines
4.1 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 2020 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/pledge.h"
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#include "libc/calls/pledge.internal.h"
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#include "libc/calls/syscall-nt.internal.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/intrin/asan.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/likely.h"
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#include "libc/intrin/promises.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/log/libfatal.internal.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/zipos/zipos.internal.h"
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/**
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* Replaces current process with program.
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*
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* On Windows, `argv` and `envp` can't contain binary strings. They need
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* to be valid UTF-8 in order to round-trip the WIN32 API, without being
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* corrupted.
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*
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* @param program will not be PATH searched, see commandv()
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* @param argv[0] is the name of the program to run
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* @param argv[1,n-2] optionally specify program arguments
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* @param argv[n-1] is NULL
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* @param envp[0,n-2] specifies "foo=bar" environment variables
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* @param envp[n-1] is NULL
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* @return doesn't return, or -1 w/ errno
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* @asyncsignalsafe
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* @vforksafe
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*/
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int execve(const char *prog, char *const argv[], char *const envp[]) {
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struct ZiposUri uri;
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int rc;
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size_t i;
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if (!prog || !argv || !envp ||
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(IsAsan() && (!__asan_is_valid_str(prog) || //
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!__asan_is_valid_strlist(argv) || //
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!__asan_is_valid_strlist(envp)))) {
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rc = efault();
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} else {
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STRACE("execve(%#s, %s, %s) → ...", prog, DescribeStringList(argv),
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DescribeStringList(envp));
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rc = 0;
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if (IsLinux() && __execpromises && _weaken(sys_pledge_linux)) {
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rc = _weaken(sys_pledge_linux)(__execpromises, __pledge_mode);
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}
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if (!rc) {
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if (_weaken(__zipos_parseuri) &&
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(_weaken(__zipos_parseuri)(prog, &uri) != -1)) {
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rc = _weaken(__zipos_open)(&uri, O_RDONLY | O_CLOEXEC, 0);
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if (rc != -1) {
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const int zipFD = rc;
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strace_enabled(-1);
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rc = fexecve(zipFD, argv, envp);
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close(zipFD);
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strace_enabled(+1);
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}
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} else if (!IsWindows()) {
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rc = sys_execve(prog, argv, envp);
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} else {
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rc = sys_execve_nt(prog, argv, envp);
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}
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}
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}
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STRACE("execve(%#s) failed %d% m", prog, rc);
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return rc;
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}
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