Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <auth.h>

void
usage(void)
{
        fprint(2, "usage: newns [-ad] [-n namespace] [cmd [args...]]\n");
        exits("usage");
}

static int
rooted(char *s)
{
        if(s[0] == '/')
                return 1;
        if(s[0] == '.' && s[1] == '/')
                return 1;
        if(s[0] == '.' && s[1] == '.' && s[2] == '/')
                return 1;
        return 0;
}

void
main(int argc, char **argv)
{
        extern int newnsdebug;
        char *defargv[] = { "/bin/rc", "-i", nil };
        char *nsfile, err[ERRMAX];
        int add;

        rfork(RFNAMEG);
        add = 0;
        nsfile = "/lib/namespace";
        ARGBEGIN{
        case 'a':
                add = 1;
                break;
        case 'd':
                newnsdebug = 1;
                break;
        case 'n':
                nsfile = ARGF();
                break;
        default:
                usage();
                break;
        }ARGEND
        if(argc == 0)
                argv = defargv;
        if (add)
                addns(getuser(), nsfile);
        else
                newns(getuser(), nsfile);
        exec(argv[0], argv);
        if(!rooted(argv[0])){
                rerrstr(err, sizeof err);
                exec(smprint("/bin/%s", argv[0]), argv);
                errstr(err, sizeof err);
        }
        sysfatal("exec: %s: %r", argv[0]);
}