mirror of
https://github.com/sheumann/hush.git
synced 2024-10-02 09:55:03 +00:00
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
|
/* vi: set sw=4 ts=4: */
|
||
|
/*
|
||
|
* tac implementation for busybox
|
||
|
*
|
||
|
* Copyright (C) 2003 Yang Xiaopeng <yxp at hanwang.com.cn>
|
||
|
* Copyright (C) 2007 Natanael Copa <natanael.copa@gmail.com>
|
||
|
* Copyright (C) 2007 Tito Ragusa <farmatito@tiscali.it>
|
||
|
*
|
||
|
* Licensed under GPLv2, see file License in this tarball for details.
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
/* tac - concatenate and print files in reverse */
|
||
|
|
||
|
/* Based on Yang Xiaopeng's (yxp at hanwang.com.cn) patch
|
||
|
* http://www.uclibc.org/lists/busybox/2003-July/008813.html
|
||
|
*/
|
||
|
|
||
|
#include "libbb.h"
|
||
|
|
||
|
/* This is a NOEXEC applet. Be very careful! */
|
||
|
|
||
|
int tac_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
||
|
int tac_main(int argc, char **argv)
|
||
|
{
|
||
|
char **name;
|
||
|
FILE *f;
|
||
|
char *line;
|
||
|
llist_t *list = NULL;
|
||
|
int retval = EXIT_SUCCESS;
|
||
|
|
||
|
argv++;
|
||
|
if (!*argv)
|
||
|
*--argv = (char *)"-";
|
||
|
/* We will read from last file to first */
|
||
|
name = argv;
|
||
|
while (*name)
|
||
|
name++;
|
||
|
|
||
|
do {
|
||
|
name--;
|
||
|
f = fopen_or_warn_stdin(*name);
|
||
|
if (f == NULL) {
|
||
|
retval = EXIT_FAILURE;
|
||
|
continue;
|
||
|
}
|
||
|
|
||
|
errno = 0;
|
||
|
/* FIXME: NUL bytes are mishandled. */
|
||
|
while ((line = xmalloc_fgets(f)) != NULL)
|
||
|
llist_add_to(&list, line);
|
||
|
|
||
|
/* xmalloc_fgets uses getc and returns NULL on error or EOF. */
|
||
|
/* It sets errno to ENOENT on EOF, but fopen_or_warn_stdin would */
|
||
|
/* catch this error so we can filter it out here. */
|
||
|
if (errno && errno != ENOENT) {
|
||
|
bb_simple_perror_msg(*name);
|
||
|
retval = EXIT_FAILURE;
|
||
|
}
|
||
|
} while (name != argv);
|
||
|
|
||
|
while (list) {
|
||
|
printf("%s", list->data);
|
||
|
list = list->link;
|
||
|
}
|
||
|
|
||
|
return retval;
|
||
|
}
|