mirror of
https://github.com/ksherlock/mpw-shell.git
synced 2024-12-28 09:29:57 +00:00
500 lines
9.6 KiB
C++
500 lines
9.6 KiB
C++
|
|
#include <vector>
|
|
#include <string>
|
|
#include <unordered_map>
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <cerrno>
|
|
#include <signal.h>
|
|
|
|
#include "mpw-shell.h"
|
|
#include "fdset.h"
|
|
|
|
#include "phase1.h"
|
|
#include "phase2.h"
|
|
#include "command.h"
|
|
|
|
#include "cxx/mapped_file.h"
|
|
#include "cxx/filesystem.h"
|
|
#include "cxx/string_splitter.h"
|
|
|
|
#include "error.h"
|
|
|
|
#include <editline/readline.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <pwd.h>
|
|
#include <sysexits.h>
|
|
|
|
namespace fs = filesystem;
|
|
|
|
|
|
fs::path root() {
|
|
|
|
static fs::path root;
|
|
|
|
if (root.empty()) {
|
|
const char *cp = getenv("HOME");
|
|
if (!cp || !*cp) {
|
|
auto pw = getpwuid(getuid());
|
|
if (!pw) {
|
|
fprintf(stderr,"Unable to determine home directory\n.");
|
|
exit(EX_NOUSER);
|
|
}
|
|
cp = pw->pw_dir;
|
|
}
|
|
root = cp;
|
|
//if (root.back() != '/') root.push_back('/');
|
|
//root += "mpw/";
|
|
root /= "mpw/";
|
|
}
|
|
return root;
|
|
}
|
|
// should set {MPW}, {MPWVersion}, then execute {MPW}StartUp
|
|
void init(Environment &env) {
|
|
|
|
env.set("mpw", root());
|
|
env.set("status", std::string("0"));
|
|
env.set("exit", std::string("1")); // terminate script on error.
|
|
env.set("echo", std::string("1"));
|
|
}
|
|
|
|
|
|
int read_file(phase1 &p, const std::string &file) {
|
|
const mapped_file mf(file, mapped_file::readonly);
|
|
|
|
p.process(mf.begin(), mf.end(), false);
|
|
p.finish();
|
|
return 0;
|
|
}
|
|
|
|
int read_fd(phase1 &p, int fd) {
|
|
|
|
unsigned char buffer[2048];
|
|
ssize_t size;
|
|
|
|
for (;;) {
|
|
size = read(fd, buffer, sizeof(buffer));
|
|
if (size == 0) break;
|
|
if (size < 0) {
|
|
if (errno == EINTR) continue;
|
|
perror("read: ");
|
|
return -1;
|
|
}
|
|
try {
|
|
p.process(buffer, buffer + size);
|
|
} catch(std::exception &ex) {
|
|
fprintf(stderr, "%s\n", ex.what());
|
|
p.reset();
|
|
}
|
|
}
|
|
|
|
try {
|
|
p.finish();
|
|
} catch(std::exception &ex) {
|
|
fprintf(stderr, "%s\n", ex.what());
|
|
p.reset();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void launch_mpw(const Environment &env, const std::vector<std::string> &argv, const fdmask &fds);
|
|
|
|
int read_make(phase1 &p1, phase2 &p2, Environment &env, const std::vector<std::string> &argv) {
|
|
|
|
int out[2];
|
|
int ok;
|
|
|
|
|
|
env.set("echo", "1");
|
|
env.set("exit", "1");
|
|
|
|
ok = pipe(out);
|
|
if (ok < 0) {
|
|
perror("pipe");
|
|
exit(EX_OSERR);
|
|
}
|
|
fcntl(out[0], F_SETFD, FD_CLOEXEC);
|
|
fcntl(out[1], F_SETFD, FD_CLOEXEC);
|
|
|
|
int child = fork();
|
|
if (child < 0) {
|
|
perror("fork");
|
|
exit(EX_OSERR);
|
|
}
|
|
if (child == 0) {
|
|
// child.
|
|
fdmask fds = {-1, out[1], -1};
|
|
|
|
launch_mpw(env, argv, fds);
|
|
|
|
exit(EX_OSERR);
|
|
}
|
|
|
|
close(out[1]);
|
|
int rv = read_fd(p1, out[0]);
|
|
close(out[0]);
|
|
p2.finish();
|
|
|
|
// check for make errors.
|
|
for(;;) {
|
|
int status;
|
|
int ok = waitpid(child, &status, 0);
|
|
if (ok < 0) {
|
|
if (errno == EINTR) continue;
|
|
perror("waitpid: ");
|
|
exit(EX_OSERR);
|
|
}
|
|
|
|
if (WIFEXITED(status)) {
|
|
ok = WEXITSTATUS(status);
|
|
env.status(ok, false);
|
|
break;
|
|
}
|
|
if (WIFSIGNALED(status)) {
|
|
env.status(-9, false);
|
|
break;
|
|
}
|
|
|
|
fprintf(stderr, "waitpid - unexpected result\n");
|
|
exit(EX_OSERR);
|
|
}
|
|
|
|
return env.status();
|
|
}
|
|
|
|
volatile int control_c = 0;
|
|
void control_c_handler(int signal, siginfo_t *sinfo, void *context) {
|
|
|
|
// libedit gobbles up the first control-C and doesn't return until the second.
|
|
// GNU's readline may return no the first.
|
|
if (control_c > 3) abort();
|
|
control_c++;
|
|
//fprintf(stderr, "interrupt!\n");
|
|
}
|
|
|
|
int interactive(Environment &env, phase1 &p, phase2& p2) {
|
|
|
|
std::string history_file = root();
|
|
history_file += ".history";
|
|
read_history(history_file.c_str());
|
|
|
|
|
|
struct sigaction act;
|
|
struct sigaction old_act;
|
|
memset(&act, 0, sizeof(struct sigaction));
|
|
sigemptyset(&act.sa_mask);
|
|
|
|
act.sa_sigaction = control_c_handler;
|
|
act.sa_flags = SA_SIGINFO;
|
|
|
|
sigaction(SIGINT, &act, &old_act);
|
|
|
|
for(;;) {
|
|
const char *prompt = "# ";
|
|
if (p2.continuation()) prompt = "> ";
|
|
char *cp = readline(prompt);
|
|
if (!cp) {
|
|
if (control_c) {
|
|
control_c = 0;
|
|
fprintf(stdout, "\n");
|
|
p.abort();
|
|
p2.abort();
|
|
env.status(-9, false);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
control_c = 0;
|
|
std::string s(cp);
|
|
free(cp);
|
|
|
|
if (s.empty()) continue;
|
|
|
|
// don't add if same as previous entry.
|
|
HIST_ENTRY *he = history_get(history_length);
|
|
if (he == nullptr || s != he->line)
|
|
add_history(s.c_str());
|
|
|
|
s.push_back('\n');
|
|
try {
|
|
p.process(s);
|
|
|
|
} catch(std::exception &ex) {
|
|
fprintf(stderr, "%s\n", ex.what());
|
|
p.reset();
|
|
}
|
|
|
|
}
|
|
|
|
try {
|
|
p.finish();
|
|
} catch(std::exception &ex) {
|
|
fprintf(stderr, "%s\n", ex.what());
|
|
p.reset();
|
|
}
|
|
|
|
sigaction(SIGINT, &old_act, nullptr);
|
|
|
|
write_history(history_file.c_str());
|
|
fprintf(stdout, "\n");
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
void help() {
|
|
|
|
}
|
|
void define(Environment &env, const std::string &s) {
|
|
|
|
auto pos = s.find('=');
|
|
if (pos == s.npos) env.set(s, "1");
|
|
else {
|
|
std::string k = s.substr(0, pos);
|
|
std::string v = s.substr(pos+1);
|
|
env.set(k, v);
|
|
}
|
|
|
|
}
|
|
|
|
std::string basename(const char *cp) {
|
|
std::string tmp(cp);
|
|
auto pos = tmp.rfind('/');
|
|
if (pos == tmp.npos) return tmp;
|
|
return tmp.substr(pos+1);
|
|
|
|
}
|
|
|
|
void make_help(void) {
|
|
|
|
#undef _
|
|
#define _(x) puts(x)
|
|
|
|
_("Make # build up-to-date version of a program");
|
|
_("Make [option...] [target...]");
|
|
_(" -d name[=value] # define variable name (overrides makefile definition)");
|
|
_(" -e # rebuild everything regardless of dates");
|
|
_(" -f filename # read dependencies from specified file (default: MakeFile)");
|
|
_(" -i dirname # additional directory to search for include files");
|
|
#if 0
|
|
_(" -[no]mf # [don't] use temporary memory (default: mf)");
|
|
#endif
|
|
_(" -p # write progress information to diagnostics");
|
|
_(" -r # display the roots of the dependency graph");
|
|
_(" -s # display the structure of the dependency graph");
|
|
_(" -t # touch dates of targets and prerequisites");
|
|
_(" -u # write list of unreachable targets to diagnostics");
|
|
_(" -v # write verbose explanations to diagnostics (implies -p)");
|
|
_(" -w # suppress warning messages");
|
|
_(" -y # like -v, but omit announcing up-to-date targets");
|
|
_("");
|
|
_(" --help # display help");
|
|
_(" --dry-run, --test # show what commands would run");
|
|
#undef _
|
|
}
|
|
|
|
int make(int argc, char **argv) {
|
|
|
|
Environment e;
|
|
init(e);
|
|
|
|
std::vector<std::string> args;
|
|
args.reserve(argc+1);
|
|
bool __ = false;
|
|
|
|
args.emplace_back("make");
|
|
|
|
for (auto iter = argv; *iter; ++iter) {
|
|
std::string tmp(*iter);
|
|
|
|
if (!__) {
|
|
if (tmp == "--")
|
|
{ __ = true; continue; }
|
|
|
|
if (tmp == "--help")
|
|
{ make_help(); exit(0); }
|
|
|
|
if (tmp == "--test" || tmp == "--dry-run")
|
|
{ e.set("test", "1"); continue; }
|
|
}
|
|
args.emplace_back(std::move(tmp));
|
|
|
|
}
|
|
|
|
phase1 p1;
|
|
phase2 p2;
|
|
|
|
p1 >>= [&p2](std::string &&s) {
|
|
if (s.empty()) p2.finish();
|
|
else p2(std::move(s));
|
|
};
|
|
|
|
p2 >>= [&e](command_ptr_vector &&v) {
|
|
|
|
for (auto iter = v.begin(); iter != v.end(); ++iter) {
|
|
auto &ptr = *iter;
|
|
fdmask fds;
|
|
try {
|
|
ptr->execute(e, fds);
|
|
} catch (execution_of_input_terminated &ex) {
|
|
control_c = 0;
|
|
if (!(ptr->terminal() && ++iter == v.end())) {
|
|
fprintf(stderr, "%s\n", ex.what());
|
|
}
|
|
e.status(ex.status(), false);
|
|
return;
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
e.startup(true);
|
|
read_file(p1, root() / "Startup");
|
|
e.startup(false);
|
|
|
|
|
|
return read_make(p1, p2, e, args);
|
|
|
|
}
|
|
|
|
fs::path mpw_path() {
|
|
|
|
static fs::path path;
|
|
|
|
if (path.empty()) {
|
|
std::error_code ec;
|
|
|
|
std::string s(getenv("PATH"));
|
|
string_splitter ss(s, ':');
|
|
for (; ss; ++ss) {
|
|
if (ss->empty()) continue;
|
|
fs::path p(*ss);
|
|
p /= "mpw";
|
|
|
|
if (fs::is_regular_file(p, ec)) {
|
|
path = std::move(p);
|
|
break;
|
|
}
|
|
}
|
|
//also check /usr/local/bin
|
|
if (path.empty()) {
|
|
fs::path p = "/usr/local/bin/mpw";
|
|
if (fs::is_regular_file(p, ec)) {
|
|
path = std::move(p);
|
|
}
|
|
}
|
|
|
|
if (path.empty()) {
|
|
fs::path p = root() / "bin/mpw";
|
|
if (fs::is_regular_file(p, ec)) {
|
|
path = std::move(p);
|
|
}
|
|
}
|
|
|
|
if (path.empty()) {
|
|
fprintf(stderr, "Unable to find mpw executable\n");
|
|
fprintf(stderr, "PATH = %s\n", s.c_str());
|
|
path = "mpw";
|
|
}
|
|
}
|
|
|
|
return path;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
mpw_path();
|
|
|
|
std::string self = basename(argv[0]);
|
|
if (self == "mpw-make") return make(argc - 1, argv + 1);
|
|
if (self == "mpw-shell" && argc > 1 && !strcmp(argv[1],"make")) return make(argc - 2, argv + 2);
|
|
|
|
Environment e;
|
|
init(e);
|
|
|
|
const char *cflag = nullptr;
|
|
|
|
int c;
|
|
while ((c = getopt(argc, argv, "c:D:v:h")) != -1) {
|
|
switch (c) {
|
|
case 'c':
|
|
// -c command
|
|
cflag = optarg;
|
|
break;
|
|
case 'D':
|
|
// -Dname or -Dname=value
|
|
define(e, optarg);
|
|
break;
|
|
case 'v':
|
|
// -v verbose
|
|
e.set("echo", "1");
|
|
break;
|
|
case 'h':
|
|
help();
|
|
exit(0);
|
|
|
|
default:
|
|
help();
|
|
exit(EX_USAGE);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
phase1 p1;
|
|
phase2 p2;
|
|
|
|
p1 >>= [&p2](std::string &&s) {
|
|
if (s.empty()) p2.finish();
|
|
else p2(std::move(s));
|
|
};
|
|
|
|
p2 >>= [&e](command_ptr_vector &&v) {
|
|
|
|
for (auto iter = v.begin(); iter != v.end(); ++iter) {
|
|
auto &ptr = *iter;
|
|
fdmask fds;
|
|
try {
|
|
ptr->execute(e, fds);
|
|
} catch (execution_of_input_terminated &ex) {
|
|
control_c = 0;
|
|
if (!(ptr->terminal() && ++iter == v.end())) {
|
|
fprintf(stderr, "%s\n", ex.what());
|
|
}
|
|
e.status(ex.status(), false);
|
|
return;
|
|
}
|
|
}
|
|
};
|
|
|
|
if (!cflag) fprintf(stdout, "MPW Shell 0.0\n");
|
|
e.startup(true);
|
|
read_file(p1, root() / "Startup");
|
|
e.startup(false);
|
|
|
|
if (cflag) {
|
|
std::string s(cflag);
|
|
s.push_back('\n');
|
|
p1.process(s, true);
|
|
p2.finish();
|
|
exit(e.status());
|
|
}
|
|
|
|
if (isatty(STDIN_FILENO))
|
|
interactive(e, p1, p2);
|
|
else
|
|
read_fd(p1, STDIN_FILENO);
|
|
p2.finish();
|
|
|
|
exit(e.status());
|
|
}
|