Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
#include <../boot/boot.h>

uchar statbuf[Statsz];

int
cache(int fd)
{
        int argc, i, p[2];
        char *argv[5], bd[32], buf[256], partition[64], *pp;

        if(stat("/boot/cfs", statbuf, sizeof statbuf) < 0)
                return fd;

        *partition = 0;

        bind("#S", "/dev", MAFTER);
        readfile("#e/cfs", buf, sizeof(buf));
        if(*buf){
                argc = tokenize(buf, argv, 4);
                for(i = 0; i < argc; i++){
                        if(strcmp(argv[i], "off") == 0)
                                return fd;
                        else if(stat(argv[i], statbuf, sizeof statbuf) >= 0){
                                strncpy(partition, argv[i], sizeof(partition)-1);
                                partition[sizeof(partition)-1] = 0;
                        }
                }
        }

        if(*partition == 0){
                readfile("#e/bootdisk", bd, sizeof(bd));
                if(*bd){
                        if(pp = strchr(bd, ':'))
                                *pp = 0;
                        /* damned artificial intelligence */
                        i = strlen(bd);
                        if(strcmp("disk", &bd[i-4]) == 0)
                                bd[i-4] = 0;
                        else if(strcmp("fs", &bd[i-2]) == 0)
                                bd[i-2] = 0;
                        else if(strcmp("fossil", &bd[i-6]) == 0)
                                bd[i-6] = 0;
                        sprint(partition, "%scache", bd);
                        if(stat(partition, statbuf, sizeof statbuf) < 0)
                                *bd = 0;
                }
                if(*bd == 0){
                        sprint(partition, "%scache", bootdisk);
                        if(stat(partition, statbuf, sizeof statbuf) < 0)
                                return fd;
                }
        }

        print("cfs...");
        if(pipe(p)<0)
                fatal("pipe");
        switch(fork()){
        case -1:
                fatal("fork");
        case 0:
                close(p[1]);
                dup(fd, 0);
                close(fd);
                dup(p[0], 1);
                close(p[0]);
                if(fflag)
                        execl("/boot/cfs", "bootcfs", "-rs", "-f", partition, 0);
                else
                        execl("/boot/cfs", "bootcfs", "-s", "-f", partition, 0);
                break;
        default:
                close(p[0]);
                close(fd);
                fd = p[1];
                break;
        }
        return fd;
}