Subversion Repositories planix.SVN

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

typedef struct Who Who;
struct Who
{
        Who *next;
        char *line;
        char *name;
};

int cmp(void *arg1, void *arg2)
{
        Who **a = arg1, **b = arg2;

        return strcmp((*a)->name, (*b)->name);
}

void
main(int argc, char **argv)
{
        int changed, i, n;
        Biobuf *b;
        char *p, *name;
        Who *first, *last, *w, *nw, **l;

        if(argc != 2){
                fprint(2, "usage: auth/uniq file\n");
                exits(0);
        }

        last = first = 0;
        b = Bopen(argv[1], OREAD);
        if(b == 0)
                exits(0);

        n = 0;
        changed = 0;
        while(p = Brdline(b, '\n')){
                p[Blinelen(b)-1] = 0;
                name = p;
                while(*p && *p != '|')
                        p++;
                if(*p)
                        *p++ = 0;

                for(nw = first; nw; nw = nw->next){
                        if(strcmp(nw->name, name) == 0){
                                free(nw->line);
                                nw->line = strdup(p);
                                changed = 1;
                                break;
                        }
                }
                if(nw)
                        continue;

                w = malloc(sizeof(Who));
                if(w == 0){
                        fprint(2, "auth/uniq: out of memory\n");
                        exits(0);
                }
                memset(w, 0, sizeof(Who));
                w->name = strdup(name);
                w->line = strdup(p);
                if(first == 0)
                        first = w;
                else
                        last->next = w;
                last = w;
                n++;
        }
        Bterm(b);

        l = malloc(n*sizeof(Who*));
        for(i = 0, nw = first; nw; nw = nw->next, i++)
                l[i] = nw;
        qsort(l, n, sizeof(Who*), cmp);

        if(!changed)
                exits(0);

        b = Bopen(argv[1], OWRITE);
        if(b == 0){
                fprint(2, "auth/uniq: can't open %s\n", argv[1]);
                exits(0);
        }
        for(i = 0; i < n; i++)
                Bprint(b, "%s|%s\n", l[i]->name, l[i]->line);
        Bterm(b);
}