Subversion Repositories planix.SVN

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

/*
 * /adm/users is
 *      id:user/group:head member:other members
 *
 * /etc/{passwd,group}
 *      name:x:nn:other stuff
 */

static int isnumber(char *s);

sniff(Biobuf *b)
{
        read first line of file into p;

        nf = getfields(p, f, nelem(f), ":");
        if(nf < 4)
                return nil;

        if(isnumber(f[0]) && !isnumber(f[2]))
                return _plan9;

        if(!isnumber(f[0]) && isnumber(f[2]))
                return _unix;

        return nil;
}


int
isnumber(char *s)
{
        char *q;

        strtol(s, &q, 10);
        return *q == '\0';
}

/* EOF */