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41 lines
644 B
41 lines
644 B
/* tac.c - output lines in reverse order
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*
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* Copyright 2012 Rob Landley <rob@landley.net>
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USE_TAC(NEWTOY(tac, NULL, TOYFLAG_USR|TOYFLAG_BIN))
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config TAC
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bool "tac"
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default y
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help
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usage: tac [FILE...]
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Output lines in reverse order.
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*/
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#define FOR_tac
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#include "toys.h"
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GLOBALS(
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struct double_list *dl;
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)
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static void do_tac(char **pline, long len)
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{
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if (pline) {
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dlist_add(&TT.dl, *pline);
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*pline = 0;
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} else while (TT.dl) {
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struct double_list *dl = dlist_lpop(&TT.dl);
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xprintf("%s", dl->data);
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free(dl->data);
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free(dl);
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}
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}
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void tac_main(void)
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{
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loopfiles_lines(toys.optargs, do_tac);
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}
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