Subversion Repositories planix.SVN

#include "lib.h"
#include <string.h>
#include <stdlib.h>
#include <fmt.h>
#include "sys9.h"
#include "dir.h"

/*
 * Format:
  3 r  M    4 (0000000000457def 11 00)   8192      512 /rc/lib/rcmain
 */

static int
getfields(char *str, char **args, int max, int mflag)
{
        char r;
        int nr, intok, narg;

        if(max <= 0)
                return 0;

        narg = 0;
        args[narg] = str;
        if(!mflag)
                narg++;
        intok = 0;
        for(;;) {
                nr = 1;                 /* utf bytes in this rune */
                r = *str++;
                if(r == 0)
                        break;
                if(r == ' ' || r == '\t'){
                        if(narg >= max)
                                break;
                        *str = 0;
                        intok = 0;
                        args[narg] = str + nr;
                        if(!mflag)
                                narg++;
                } else {
                        if(!intok && mflag)
                                narg++;
                        intok = 1;
                }
        }
        return narg;
}
int
_IOUNIT(int fd)
{
        int i, cfd;
        char buf[128], *args[10];

        snprint(buf, sizeof buf, "#d/%dctl", fd);
        cfd = _OPEN(buf, OREAD);
        if(cfd < 0)
                return 0;
        i = _READ(cfd, buf, sizeof buf-1);
        _CLOSE(cfd);
        if(i <= 0)
                return 0;
        buf[i] = '\0';
        if(getfields(buf, args, 10, 1) != 10)
                return 0;
        return atoi(args[7]);
}