mirror of
https://github.com/jart/cosmopolitan.git
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d2f49ca175
Our makefile generator now accepts badly formatted include lines. It's now more hermetic with better error checking in the cosmo repo, and it can be configured to not be hermetic at all.
98 lines
4.6 KiB
C
98 lines
4.6 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/runtime/runtime.h"
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#include "libc/runtime/zipos.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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/**
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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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* On Windows, only file descriptors 0, 1 and 2 can be passed to a child
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* process in such a way that allows them to be automatically discovered
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* when the child process initializes. Cosmpolitan currently treats your
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* other file descriptors as implicitly O_CLOEXEC.
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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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* @raise ETXTBSY if another process has `prog` open in write mode
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* @raise ENOEXEC if file is executable but not a valid format
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* @raise ENOMEM if remaining stack memory is insufficient
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* @raise EACCES if execute permission was denied
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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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int rc;
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struct ZiposUri uri;
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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 (0 && _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);
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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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