Mercurial > hg > toybox
view toys/other/tac.c @ 788:a94ca6ee780f
Silence deeply stupid gcc warning. (First non-declaration line of function: if (file) ffd = open(); at end of of function: if (file) close(ffd); "file" is an argument to the function and nothing else assigns to it. gcc warning on that close, "ffd may be used uninitialized!" _HOW_?)
author | Rob Landley <rob@landley.net> |
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date | Mon, 14 Jan 2013 05:25:19 -0600 |
parents | 54d248b907ed |
children |
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/* tac.c - output lines in reverse order * * Copyright 2012 Rob Landley <rob@landley.net> USE_TAC(NEWTOY(tac, NULL, TOYFLAG_USR|TOYFLAG_BIN)) config TAC bool "tac" default y help usage: tac [FILE...] Output lines in reverse order. */ #include "toys.h" void do_tac(int fd, char *name) { struct arg_list *list = NULL; char *c; // Read in lines for (;;) { struct arg_list *temp; long len; if (!(c = get_rawline(fd, &len, '\n'))) break; temp = xmalloc(sizeof(struct arg_list)); temp->next = list; temp->arg = c; list = temp; } // Play them back. while (list) { struct arg_list *temp = list->next; xprintf("%s", list->arg); free(list->arg); free(list); list = temp; } } void tac_main(void) { loopfiles(toys.optargs, do_tac); }