105 lines
2.0 KiB
C
105 lines
2.0 KiB
C
/*
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* This file is part of the UCB release of Plan 9. It is subject to the license
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* terms in the LICENSE file found in the top-level directory of this
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* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
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* part of the UCB release of Plan 9, including this file, may be copied,
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* modified, propagated, or distributed except according to the terms contained
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* in the LICENSE file.
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*/
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/* Portions of this file are Copyright (C) 9front's team.
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* See /doc/license/9front-mit for details about the licensing.
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* See http://git.9front.org/plan9front/plan9front/HEAD/info.html for a list of authors.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <bio.h>
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typedef struct Who Who;
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struct Who
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{
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Who *next;
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char *line;
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char *name;
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};
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int cmp(const void *arg1, const void *arg2)
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{
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Who **a = (Who **)arg1, **b = (Who **)arg2;
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return strcmp((*a)->name, (*b)->name);
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}
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void
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main(int argc, char **argv)
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{
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int changed, i, n;
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Biobuf *b;
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char *p, *name;
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Who *first, *last, *w, *nw, **l;
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if(argc != 2){
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fprint(2, "usage: auth/uniq file\n");
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exits(0);
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}
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last = first = 0;
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b = Bopen(argv[1], OREAD);
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if(b == 0)
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exits(0);
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n = 0;
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changed = 0;
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while(p = Brdline(b, '\n')){
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p[Blinelen(b)-1] = 0;
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name = p;
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while(*p && *p != '|')
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p++;
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if(*p)
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*p++ = 0;
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for(nw = first; nw; nw = nw->next){
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if(strcmp(nw->name, name) == 0){
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free(nw->line);
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nw->line = strdup(p);
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changed = 1;
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break;
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}
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}
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if(nw)
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continue;
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w = malloc(sizeof(Who));
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if(w == 0){
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fprint(2, "auth/uniq: out of memory\n");
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exits(0);
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}
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memset(w, 0, sizeof(Who));
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w->name = strdup(name);
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w->line = strdup(p);
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if(first == 0)
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first = w;
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else
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last->next = w;
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last = w;
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n++;
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}
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Bterm(b);
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l = malloc(n*sizeof(Who*));
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for(i = 0, nw = first; nw; nw = nw->next, i++)
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l[i] = nw;
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qsort(l, n, sizeof(Who*), cmp);
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if(!changed)
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exits(0);
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b = Bopen(argv[1], OWRITE);
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if(b == 0){
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fprint(2, "auth/uniq: can't open %s\n", argv[1]);
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exits(0);
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}
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for(i = 0; i < n; i++)
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Bprint(b, "%s|%s\n", l[i]->name, l[i]->line);
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Bterm(b);
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}
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