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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#include "rust_kernel.h"
#ifdef __APPLE__
#include <crt_externs.h>
#endif
struct RunProgramResult {
pid_t pid;
void* handle;
};
#if defined(__WIN32__)
#include <process.h>
#include <io.h>
bool backslash_run_ends_in_quote(char const *c) {
while (*c == '\\') ++c;
return *c == '"';
}
void append_first_char(char *&buf, char const *c) {
switch (*c) {
case '"':
// Escape quotes.
*buf++ = '\\';
*buf++ = '"';
break;
case '\\':
if (backslash_run_ends_in_quote(c)) {
// Double all backslashes that are in runs before quotes.
*buf++ = '\\';
*buf++ = '\\';
} else {
// Pass other backslashes through unescaped.
*buf++ = '\\';
}
break;
default:
*buf++ = *c;
}
}
bool contains_whitespace(char const *arg) {
while (*arg) {
switch (*arg++) {
case ' ':
case '\t':
return true;
}
}
return false;
}
void append_arg(char *& buf, char const *arg, bool last) {
bool quote = contains_whitespace(arg);
if (quote)
*buf++ = '"';
while (*arg)
append_first_char(buf, arg++);
if (quote)
*buf++ = '"';
if (! last) {
*buf++ = ' ';
} else {
*buf++ = '\0';
}
}
extern "C" CDECL RunProgramResult
rust_run_program(const char* argv[],
void* envp,
const char* dir,
int in_fd, int out_fd, int err_fd) {
STARTUPINFO si;
ZeroMemory(&si, sizeof(STARTUPINFO));
si.cb = sizeof(STARTUPINFO);
si.dwFlags = STARTF_USESTDHANDLES;
RunProgramResult result = {-1, NULL};
HANDLE curproc = GetCurrentProcess();
HANDLE origStdin = (HANDLE)_get_osfhandle(in_fd ? in_fd : 0);
if (!DuplicateHandle(curproc, origStdin,
curproc, &si.hStdInput, 0, 1, DUPLICATE_SAME_ACCESS))
return result;
HANDLE origStdout = (HANDLE)_get_osfhandle(out_fd ? out_fd : 1);
if (!DuplicateHandle(curproc, origStdout,
curproc, &si.hStdOutput, 0, 1, DUPLICATE_SAME_ACCESS))
return result;
HANDLE origStderr = (HANDLE)_get_osfhandle(err_fd ? err_fd : 2);
if (!DuplicateHandle(curproc, origStderr,
curproc, &si.hStdError, 0, 1, DUPLICATE_SAME_ACCESS))
return result;
size_t cmd_len = 0;
for (const char** arg = argv; *arg; arg++) {
cmd_len += strlen(*arg);
cmd_len += 3; // Two quotes plus trailing space or \0
}
cmd_len *= 2; // Potentially backslash-escape everything.
char* cmd = (char*)malloc(cmd_len);
char* pos = cmd;
for (const char** arg = argv; *arg; arg++) {
append_arg(pos, *arg, *(arg+1) == NULL);
}
PROCESS_INFORMATION pi;
BOOL created = CreateProcess(NULL, cmd, NULL, NULL, TRUE,
0, envp, dir, &si, &pi);
CloseHandle(si.hStdInput);
CloseHandle(si.hStdOutput);
CloseHandle(si.hStdError);
free(cmd);
if (!created) {
return result;
}
// We close the thread handle because we don't care about keeping the thread id valid,
// and we aren't keeping the thread handle around to be able to close it later. We don't
// close the process handle however because we want the process id to stay valid at least
// until the calling rust code closes the process handle.
CloseHandle(pi.hThread);
result.pid = pi.dwProcessId;
result.handle = pi.hProcess;
return result;
}
extern "C" CDECL int
rust_process_wait(int pid) {
HANDLE proc = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION, FALSE, pid);
if (proc == NULL) {
return -1;
}
DWORD status;
while (true) {
if (!GetExitCodeProcess(proc, &status)) {
CloseHandle(proc);
return -1;
}
if (status != STILL_ACTIVE) {
CloseHandle(proc);
return (int) status;
}
WaitForSingleObject(proc, INFINITE);
}
}
#elif defined(__GNUC__)
#include <sys/file.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <termios.h>
#ifdef __FreeBSD__
extern char **environ;
#endif
extern "C" CDECL RunProgramResult
rust_run_program(const char* argv[],
void* envp,
const char* dir,
int in_fd, int out_fd, int err_fd) {
int pid = fork();
if (pid != 0) {
RunProgramResult result = {pid, NULL};
return result;
}
sigset_t sset;
sigemptyset(&sset);
sigprocmask(SIG_SETMASK, &sset, NULL);
if (in_fd) dup2(in_fd, 0);
if (out_fd) dup2(out_fd, 1);
if (err_fd) dup2(err_fd, 2);
/* Close all other fds. */
for (int fd = getdtablesize() - 1; fd >= 3; fd--) close(fd);
if (dir) {
int result = chdir(dir);
// FIXME (#2674): need error handling
assert(!result && "chdir failed");
}
if (envp) {
#ifdef __APPLE__
*_NSGetEnviron() = (char **)envp;
#else
environ = (char **)envp;
#endif
}
execvp(argv[0], (char * const *)argv);
exit(1);
}
extern "C" CDECL int
rust_process_wait(int pid) {
// FIXME: stub; exists to placate linker. (#2692)
return 0;
}
#else
#error "Platform not supported."
#endif
//
// Local Variables:
// mode: C++
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
//
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