Subversion Repositories planix.SVN

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

char *namespace;

void
usage(void)
{
        fprint(2, "usage: auth/none [-n namespace] [cmd ...]\n");
        exits("usage");
}

void
main(int argc, char *argv[])
{
        char cmd[256];
        int fd;

        ARGBEGIN{
        case 'n':
                namespace = EARGF(usage());
                break;
        default:
                usage();
        }ARGEND

        if (rfork(RFENVG|RFNAMEG) < 0)
                sysfatal("can't make new pgrp");

        fd = open("#c/user", OWRITE);
        if (fd < 0)
                sysfatal("can't open #c/user");
        if (write(fd, "none", strlen("none")) < 0)
                sysfatal("can't become none");
        close(fd);

        if (newns("none", namespace) < 0)
                sysfatal("can't build namespace");

        if (argc > 0) {
                strecpy(cmd, cmd+sizeof cmd, argv[0]);
                exec(cmd, &argv[0]);
                if (strncmp(cmd, "/", 1) != 0
                && strncmp(cmd, "./", 2) != 0
                && strncmp(cmd, "../", 3) != 0) {
                        snprint(cmd, sizeof cmd, "/bin/%s", argv[0]);
                        exec(cmd, &argv[0]);
                }
        } else {
                strcpy(cmd, "/bin/rc");
                execl(cmd, cmd, nil);
        }
        sysfatal(cmd);
}