* Initial version of nix.
This commit is contained in:
Eelco Dolstra
parent
841fcbd047
commit
75d788b0f2
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@ -0,0 +1,2 @@
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nix: nix.c
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gcc -g -Wall -o nix nix.c -ldb-4
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <db4/db.h>
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#define PKGINFO_PATH "/pkg/sys/var/pkginfo"
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typedef enum {true = 1, false = 0} bool;
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static char * prog;
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static char * dbfile = PKGINFO_PATH;
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DB * openDB(char * dbname, bool readonly)
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{
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int err;
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DB * db;
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err = db_create(&db, 0, 0);
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if (err) {
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fprintf(stderr, "error creating db handle: %s\n",
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db_strerror(err));
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return 0;
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}
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err = db->open(db, dbfile, dbname,
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DB_HASH, readonly ? DB_RDONLY : DB_CREATE, 0666);
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if (err) {
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fprintf(stderr, "creating opening %s: %s\n",
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dbfile, db_strerror(err));
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db->close(db, 0);
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return 0;
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}
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return db;
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}
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bool queryDB(char * dbname, char * key, char * * data)
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{
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DB * db = 0;
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DBT kt, dt;
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int err;
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db = openDB(dbname, true);
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if (!db) goto bad;
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*data = 0;
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memset(&kt, 0, sizeof(kt));
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memset(&dt, 0, sizeof(dt));
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kt.size = strlen(key);
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kt.data = key;
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err = db->get(db, 0, &kt, &dt, 0);
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if (!err) {
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*data = malloc(dt.size + 1);
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memcpy(*data, dt.data, dt.size);
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(*data)[dt.size] = 0;
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} else if (err != DB_NOTFOUND) {
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fprintf(stderr, "creating opening %s: %s\n",
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dbfile, db_strerror(err));
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goto bad;
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}
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db->close(db, 0);
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return true;
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bad:
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if (db) db->close(db, 0);
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return false;
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}
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bool setDB(char * dbname, char * key, char * data)
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{
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DB * db = 0;
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DBT kt, dt;
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int err;
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db = openDB(dbname, false);
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if (!db) goto bad;
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memset(&kt, 0, sizeof(kt));
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memset(&dt, 0, sizeof(dt));
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kt.size = strlen(key);
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kt.data = key;
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dt.size = strlen(data);
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dt.data = data;
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err = db->put(db, 0, &kt, &dt, 0);
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if (err) {
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fprintf(stderr, "error storing data in %s: %s\n",
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dbfile, db_strerror(err));
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goto bad;
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}
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db->close(db, 0);
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return true;
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bad:
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if (db) db->close(db, 0);
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return false;
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}
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bool delDB(char * dbname, char * key)
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{
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DB * db = 0;
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DBT kt;
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int err;
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db = openDB(dbname, false);
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if (!db) goto bad;
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memset(&kt, 0, sizeof(kt));
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kt.size = strlen(key);
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kt.data = key;
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err = db->del(db, 0, &kt, 0);
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if (err) {
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fprintf(stderr, "error deleting data from %s: %s\n",
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dbfile, db_strerror(err));
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goto bad;
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}
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db->close(db, 0);
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return true;
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bad:
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if (db) db->close(db, 0);
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return false;
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}
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bool getPkg(int argc, char * * argv)
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{
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char * pkg;
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char * src = 0;
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char * inst = 0;
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char inst2[1024];
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char cmd[2048];
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int res;
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if (argc != 1) {
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fprintf(stderr, "arguments missing in get-pkg\n");
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return false;
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}
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pkg = argv[0];
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if (!queryDB("pkginst", pkg, &inst)) return false;
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if (inst) {
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printf("%s\n", inst);
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free(inst);
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} else {
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fprintf(stderr, "package %s is not yet installed\n", pkg);
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if (!queryDB("pkgsrc", pkg, &src)) return false;
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if (!src) {
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fprintf(stderr, "source of package %s is not known\n", pkg);
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return false;
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}
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if (snprintf(inst2, sizeof(inst2), "/pkg/%s", pkg) >= sizeof(inst2)) {
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fprintf(stderr, "buffer overflow\n");
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free(src);
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return false;
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}
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if (snprintf(cmd, sizeof(cmd), "rsync -a \"%s\"/ \"%s\"",
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src, inst2) >= sizeof(cmd))
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{
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fprintf(stderr, "buffer overflow\n");
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free(src);
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return false;
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}
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res = system(cmd);
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if (!WIFEXITED(res) || WEXITSTATUS(res) != 0) {
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fprintf(stderr, "unable to copy sources\n");
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free(src);
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return false;
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}
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if (chdir(inst2)) {
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fprintf(stderr, "unable to chdir to package directory\n");
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free(src);
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return false;
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}
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/* Prepare for building. Clean the environment so that the
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build process does not inherit things it shouldn't. */
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setenv("PATH", "/pkg/sys/bin", 1);
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res = system("./buildme");
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if (!WIFEXITED(res) || WEXITSTATUS(res) != 0) {
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fprintf(stderr, "unable to build package\n");
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free(src);
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return false;
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}
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setDB("pkginst", pkg, inst2);
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free(src);
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printf("%s\n", inst2);
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}
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return true;
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}
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bool registerPkg(int argc, char * * argv)
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{
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char * pkg;
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char * src;
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if (argc != 2) {
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fprintf(stderr, "arguments missing in register-pkg\n");
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return false;
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}
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pkg = argv[0];
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src = argv[1];
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return setDB("pkgsrc", pkg, src);
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}
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/* This is primarily used for bootstrapping. */
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bool registerInstalledPkg(int argc, char * * argv)
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{
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char * pkg;
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char * inst;
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if (argc != 2) {
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fprintf(stderr, "arguments missing in register-installed-pkg\n");
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return false;
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}
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pkg = argv[0];
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inst = argv[1];
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if (strcmp(inst, "") == 0)
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return delDB("pkginst", pkg);
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else
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return setDB("pkginst", pkg, inst);
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}
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bool run(int argc, char * * argv)
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{
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char * cmd;
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if (argc < 1) {
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fprintf(stderr, "command not specified\n");
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return false;
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}
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cmd = argv[0];
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argc--, argv++;
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if (strcmp(cmd, "get-pkg") == 0)
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return getPkg(argc, argv);
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else if (strcmp(cmd, "register-pkg") == 0)
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return registerPkg(argc, argv);
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else if (strcmp(cmd, "register-installed-pkg") == 0)
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return registerInstalledPkg(argc, argv);
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else {
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fprintf(stderr, "unknown command: %s\n", cmd);
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return false;
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}
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}
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int main(int argc, char * * argv)
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{
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int c;
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prog = argv[0];
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while ((c = getopt(argc, argv, "d:")) != EOF) {
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switch (c) {
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case 'd':
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dbfile = optarg;
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break;
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default:
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fprintf(stderr, "unknown option\n");
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break;
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}
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}
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argc -= optind, argv += optind;
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if (!run(argc, argv))
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return 1;
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else
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return 0;
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}
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@ -0,0 +1,86 @@
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#! /bin/sh
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. ./settings
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if ! ./mountloop; then
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exit 1
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fi
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# Cleanup.
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rm -rf $target/dev
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rm -rf $target/proc
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# Create the basic directory structure.
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mkdir $target
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mkdir $target/dev
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mkdir $target/proc
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mkdir $target/pkg
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mkdir $target/pkg/sys
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mkdir $target/pkg/sys/bin
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mkdir $target/pkg/sys/var
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mkdir $target/mnt
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mkdir $target/mnt/host
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mkdir -m 1777 $target/tmp
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# Make package registrations.
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pkgdb=$target/pkg/sys/var/pkginfo
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# Copy some programs and its libraries.
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utils="/usr/bin/vi /bin/sh /bin/mount /bin/umount /bin/ls /bin/ln /bin/cp /bin/mv /bin/rm /bin/cat /bin/df /bin/pwd /usr/bin/ld /usr/bin/as /bin/sed /bin/chmod /bin/chown /usr/bin/expr /bin/mkdir /bin/rmdir /usr/bin/sort /usr/bin/uniq /bin/uname /usr/bin/grep /bin/sleep /usr/bin/rsync /usr/bin/make /usr/bin/cmp /bin/date /usr/bin/tr /usr/bin/ar /usr/bin/ranlib /usr/bin/basename /usr/bin/less ../src/nix"
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bootlib=/pkg/prog-bootstrap/lib
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bootbin=/pkg/prog-bootstrap/bin
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mkdir -p $target/$bootlib
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mkdir -p $target/$bootbin
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cp -p $utils $target/$bootbin
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libs=`ldd $utils | awk '{ print $3 }' | sort | uniq`
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echo $libs
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cp -p $libs $target/$bootlib
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for i in libc.so.6 libdl.so.2 libpthread.so.0 librt.so.1 libresolv.so.2 ld-linux.so.2; do rm $target/$bootlib/$i; done
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../src/nix -d $pkgdb register-installed-pkg prog-bootstrap /pkg/prog-bootstrap
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mv $target/$bootbin/nix $target/pkg/sys/bin
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../src/nix -d $pkgdb register-installed-pkg sys /pkg/sys
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# Copy the bootstrap gcc.
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echo Copying gcc...
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rsync -a ../bootstrap/gcc/inst/pkg $target
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../src/nix -d $pkgdb register-installed-pkg gcc-bootstrap /pkg/gcc-bootstrap
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# Copy the bootstrap glibc.
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echo Copying glibc...
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glibcdir=/pkg/glibc-bootstrap
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rsync -a ../bootstrap/glibc/inst/pkg $target
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../src/nix -d $pkgdb register-installed-pkg glibc-bootstrap $glibcdir
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# Copy the bootstrap kernel header files.
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echo Copying kernel headers...
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kerneldir=/pkg/kernel-bootstrap
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rsync -a ../bootstrap/kernel/inst/pkg $target
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../src/nix -d $pkgdb register-installed-pkg kernel-bootstrap $kerneldir
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# Compatibility.
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rm -rf $target/lib
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mkdir $target/lib
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ln -sf $glibcdir/lib/ld-linux.so.2 $target/lib/ld-linux.so.2
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rm -rf $target/bin
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mkdir $target/bin
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ln -sf $bootbin/sh $target/bin/sh
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# Build ld.so.cache.
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ldsoconf=$target/$glibcdir/etc/ld.so.conf
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echo $glibcdir/lib > $ldsoconf
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echo $bootlib >> $ldsoconf
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$target/$glibcdir/sbin/ldconfig -r $target
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# Source repository.
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rm -f $target/src
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ln -sf /mnt/host/`pwd`/../src $target/src
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# Copy boot script.
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cp -p ./start $target/pkg/sys/bin
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# Done.
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echo Done!
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umount $target
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rmdir $target
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@ -0,0 +1,11 @@
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#! /bin/sh
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. ./settings
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rm $image
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dd if=/dev/zero of=$image bs=1M count=1 seek=256
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/sbin/mke2fs -F -j $image
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/sbin/tune2fs -c 0 $image
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/sbin/tune2fs -i 0 $image
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@ -0,0 +1,8 @@
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#! /bin/sh
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. ./settings
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mkdir $target
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if ! mount -o loop -t ext3 $image $target; then
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exit 1
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fi
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@ -0,0 +1,5 @@
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#! /bin/sh
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. ./settings
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linux ubd0=$image init=/pkg/sys/bin/start
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image=/var/tmp/nix.img
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target=./loop
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#! /pkg/prog-bootstrap/bin/sh
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# This directory contains nix.
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export PATH=/pkg/sys/bin
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# Add in the utilities needed for booting.
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export PATH=$PATH:`nix get-pkg prog-bootstrap`/bin
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echo
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echo Starting up...
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echo Mounting file systems...
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mount -n -o remount,rw /dev/root /
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mount -n -t proc none /proc
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mount -n -t hostfs none /mnt/host
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echo Registering available src packages...
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( cd /src
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for i in *; do
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if test -d $i; then
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echo " $i"
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nix register-pkg $i /src/$i
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fi
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done
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)
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export PATH=`nix get-pkg coreutils-4.5.7`/bin:$PATH
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echo
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echo "=== starting interactive shell ==="
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sh
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echo
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echo Shutting down...
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umount /proc
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#sync
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mount -n -o remount,ro /dev/root /
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#sync
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