From 3a9241add947cb6d24b5de7a8927517426a78795 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Sat, 25 Aug 2012 14:25:22 -0500 Subject: Move commands into "posix", "lsb", and "other" menus/directories. --- toys/other/tac.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 toys/other/tac.c (limited to 'toys/other/tac.c') diff --git a/toys/other/tac.c b/toys/other/tac.c new file mode 100644 index 00000000..cd5f83f6 --- /dev/null +++ b/toys/other/tac.c @@ -0,0 +1,55 @@ +/* vi: set sw=4 ts=4: + * + * tac.c - output lines in reverse order + * + * Copyright 2012 Rob Landley + * + * Not in SUSv4. + +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; + int len; + + if (!(c = get_line(fd))) break; + + len = strlen(c); + if (len && c[len-1]=='\n') c[len-1] = 0; + 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; + xputs(list->arg); + free(list->arg); + free(list); + list = temp; + } +} + +void tac_main(void) +{ + loopfiles(toys.optargs, do_tac); +} -- cgit v1.2.3