* Converted to C++.

This commit is contained in:
Eelco Dolstra 2003-03-13 16:28:32 +00:00
parent 75d788b0f2
commit 18ebf518de
3 changed files with 222 additions and 316 deletions

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@ -1,2 +1,2 @@
nix: nix.c nix: nix.cc
gcc -g -Wall -o nix nix.c -ldb-4 g++ -g -Wall -o nix nix.cc -ldb_cxx-4

314
src/nix.c
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#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <db4/db.h>
#define PKGINFO_PATH "/pkg/sys/var/pkginfo"
typedef enum {true = 1, false = 0} bool;
static char * prog;
static char * dbfile = PKGINFO_PATH;
DB * openDB(char * dbname, bool readonly)
{
int err;
DB * db;
err = db_create(&db, 0, 0);
if (err) {
fprintf(stderr, "error creating db handle: %s\n",
db_strerror(err));
return 0;
}
err = db->open(db, dbfile, dbname,
DB_HASH, readonly ? DB_RDONLY : DB_CREATE, 0666);
if (err) {
fprintf(stderr, "creating opening %s: %s\n",
dbfile, db_strerror(err));
db->close(db, 0);
return 0;
}
return db;
}
bool queryDB(char * dbname, char * key, char * * data)
{
DB * db = 0;
DBT kt, dt;
int err;
db = openDB(dbname, true);
if (!db) goto bad;
*data = 0;
memset(&kt, 0, sizeof(kt));
memset(&dt, 0, sizeof(dt));
kt.size = strlen(key);
kt.data = key;
err = db->get(db, 0, &kt, &dt, 0);
if (!err) {
*data = malloc(dt.size + 1);
memcpy(*data, dt.data, dt.size);
(*data)[dt.size] = 0;
} else if (err != DB_NOTFOUND) {
fprintf(stderr, "creating opening %s: %s\n",
dbfile, db_strerror(err));
goto bad;
}
db->close(db, 0);
return true;
bad:
if (db) db->close(db, 0);
return false;
}
bool setDB(char * dbname, char * key, char * data)
{
DB * db = 0;
DBT kt, dt;
int err;
db = openDB(dbname, false);
if (!db) goto bad;
memset(&kt, 0, sizeof(kt));
memset(&dt, 0, sizeof(dt));
kt.size = strlen(key);
kt.data = key;
dt.size = strlen(data);
dt.data = data;
err = db->put(db, 0, &kt, &dt, 0);
if (err) {
fprintf(stderr, "error storing data in %s: %s\n",
dbfile, db_strerror(err));
goto bad;
}
db->close(db, 0);
return true;
bad:
if (db) db->close(db, 0);
return false;
}
bool delDB(char * dbname, char * key)
{
DB * db = 0;
DBT kt;
int err;
db = openDB(dbname, false);
if (!db) goto bad;
memset(&kt, 0, sizeof(kt));
kt.size = strlen(key);
kt.data = key;
err = db->del(db, 0, &kt, 0);
if (err) {
fprintf(stderr, "error deleting data from %s: %s\n",
dbfile, db_strerror(err));
goto bad;
}
db->close(db, 0);
return true;
bad:
if (db) db->close(db, 0);
return false;
}
bool getPkg(int argc, char * * argv)
{
char * pkg;
char * src = 0;
char * inst = 0;
char inst2[1024];
char cmd[2048];
int res;
if (argc != 1) {
fprintf(stderr, "arguments missing in get-pkg\n");
return false;
}
pkg = argv[0];
if (!queryDB("pkginst", pkg, &inst)) return false;
if (inst) {
printf("%s\n", inst);
free(inst);
} else {
fprintf(stderr, "package %s is not yet installed\n", pkg);
if (!queryDB("pkgsrc", pkg, &src)) return false;
if (!src) {
fprintf(stderr, "source of package %s is not known\n", pkg);
return false;
}
if (snprintf(inst2, sizeof(inst2), "/pkg/%s", pkg) >= sizeof(inst2)) {
fprintf(stderr, "buffer overflow\n");
free(src);
return false;
}
if (snprintf(cmd, sizeof(cmd), "rsync -a \"%s\"/ \"%s\"",
src, inst2) >= sizeof(cmd))
{
fprintf(stderr, "buffer overflow\n");
free(src);
return false;
}
res = system(cmd);
if (!WIFEXITED(res) || WEXITSTATUS(res) != 0) {
fprintf(stderr, "unable to copy sources\n");
free(src);
return false;
}
if (chdir(inst2)) {
fprintf(stderr, "unable to chdir to package directory\n");
free(src);
return false;
}
/* Prepare for building. Clean the environment so that the
build process does not inherit things it shouldn't. */
setenv("PATH", "/pkg/sys/bin", 1);
res = system("./buildme");
if (!WIFEXITED(res) || WEXITSTATUS(res) != 0) {
fprintf(stderr, "unable to build package\n");
free(src);
return false;
}
setDB("pkginst", pkg, inst2);
free(src);
printf("%s\n", inst2);
}
return true;
}
bool registerPkg(int argc, char * * argv)
{
char * pkg;
char * src;
if (argc != 2) {
fprintf(stderr, "arguments missing in register-pkg\n");
return false;
}
pkg = argv[0];
src = argv[1];
return setDB("pkgsrc", pkg, src);
}
/* This is primarily used for bootstrapping. */
bool registerInstalledPkg(int argc, char * * argv)
{
char * pkg;
char * inst;
if (argc != 2) {
fprintf(stderr, "arguments missing in register-installed-pkg\n");
return false;
}
pkg = argv[0];
inst = argv[1];
if (strcmp(inst, "") == 0)
return delDB("pkginst", pkg);
else
return setDB("pkginst", pkg, inst);
}
bool run(int argc, char * * argv)
{
char * cmd;
if (argc < 1) {
fprintf(stderr, "command not specified\n");
return false;
}
cmd = argv[0];
argc--, argv++;
if (strcmp(cmd, "get-pkg") == 0)
return getPkg(argc, argv);
else if (strcmp(cmd, "register-pkg") == 0)
return registerPkg(argc, argv);
else if (strcmp(cmd, "register-installed-pkg") == 0)
return registerInstalledPkg(argc, argv);
else {
fprintf(stderr, "unknown command: %s\n", cmd);
return false;
}
}
int main(int argc, char * * argv)
{
int c;
prog = argv[0];
while ((c = getopt(argc, argv, "d:")) != EOF) {
switch (c) {
case 'd':
dbfile = optarg;
break;
default:
fprintf(stderr, "unknown option\n");
break;
}
}
argc -= optind, argv += optind;
if (!run(argc, argv))
return 1;
else
return 0;
}

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src/nix.cc Normal file
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#include <iostream>
#include <memory>
#include <string>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <db4/db_cxx.h>
using namespace std;
#define PKGINFO_PATH "/pkg/sys/var/pkginfo"
static string prog;
static string dbfile = PKGINFO_PATH;
class Db2 : public Db
{
public:
Db2(DbEnv *env, u_int32_t flags)
: Db(env, flags)
{
}
~Db2()
{
close(0);
}
};
auto_ptr<Db2> openDB(const string & dbname, bool readonly)
{
auto_ptr<Db2> db;
db = auto_ptr<Db2>(new Db2(0, 0));
db->open(dbfile.c_str(), dbname.c_str(),
DB_HASH, readonly ? DB_RDONLY : DB_CREATE, 0666);
return db;
}
bool queryDB(const string & dbname, const string & key, string & data)
{
int err;
auto_ptr<Db2> db = openDB(dbname, true);
Dbt kt((void *) key.c_str(), key.length());
Dbt dt;
err = db->get(0, &kt, &dt, 0);
if (err) return false;
data = string((char *) dt.get_data(), dt.get_size());
return true;
}
void setDB(const string & dbname, const string & key, const string & data)
{
auto_ptr<Db2> db = openDB(dbname, false);
Dbt kt((void *) key.c_str(), key.length());
Dbt dt((void *) data.c_str(), data.length());
db->put(0, &kt, &dt, 0);
}
void delDB(const string & dbname, const string & key)
{
auto_ptr<Db2> db = openDB(dbname, false);
Dbt kt((void *) key.c_str(), key.length());
db->del(0, &kt, 0);
}
void getPkg(int argc, char * * argv)
{
string pkg;
string src;
string inst;
string cmd;
int res;
if (argc != 1)
throw string("arguments missing in get-pkg");
pkg = argv[0];
if (queryDB("pkginst", pkg, inst)) {
cout << inst << endl;
return;
}
cerr << "package " << pkg << " is not yet installed\n";
if (!queryDB("pkgsrc", pkg, src))
throw string("source of package " + string(pkg) + " is not known");
inst = "/pkg/" + pkg;
cmd = "rsync -a \"" + src + "\"/ \"" + inst + "\"";
res = system(cmd.c_str());
if (!WIFEXITED(res) || WEXITSTATUS(res) != 0)
throw string("unable to copy sources");
if (chdir(inst.c_str()))
throw string("unable to chdir to package directory");
/* Prepare for building. Clean the environment so that the
build process does not inherit things it shouldn't. */
setenv("PATH", "/pkg/sys/bin", 1);
res = system("./buildme");
if (!WIFEXITED(res) || WEXITSTATUS(res) != 0)
throw string("unable to build package");
setDB("pkginst", pkg, inst);
cout << inst << endl;
}
void registerPkg(int argc, char * * argv)
{
char * pkg;
char * src;
if (argc != 2)
throw string("arguments missing in register-pkg");
pkg = argv[0];
src = argv[1];
setDB("pkgsrc", pkg, src);
}
/* This is primarily used for bootstrapping. */
void registerInstalledPkg(int argc, char * * argv)
{
string pkg;
string inst;
if (argc != 2)
throw string("arguments missing in register-installed-pkg");
pkg = argv[0];
inst = argv[1];
if (inst == "")
delDB("pkginst", pkg);
else
setDB("pkginst", pkg, inst);
}
void run(int argc, char * * argv)
{
string cmd;
if (argc < 1)
throw string("command not specified\n");
cmd = argv[0];
argc--, argv++;
if (cmd == "get-pkg")
getPkg(argc, argv);
else if (cmd == "register-pkg")
registerPkg(argc, argv);
else if (cmd == "register-installed-pkg")
registerInstalledPkg(argc, argv);
else
throw string("unknown command: " + string(cmd));
}
int main(int argc, char * * argv)
{
int c;
prog = argv[0];
while ((c = getopt(argc, argv, "d:")) != EOF) {
switch (c) {
case 'd':
dbfile = optarg;
break;
default:
cerr << "unknown option\n";
break;
}
}
argc -= optind, argv += optind;
try {
run(argc, argv);
return 0;
} catch (DbException e) {
cerr << "db exception: " << e.what() << endl;
return 1;
} catch (string s) {
cerr << s << endl;
return 1;
}
}