/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
 * Swiss federal institute of technology (ETH Zurich)
 * Subject to the GPL, version 2.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <getopt.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/fsuid.h>

#include "xmalloc.h"
#include "die.h"
#include "bpf.h"

static const char *short_options = "vhi:Vdbf:p";
static const struct option long_options[] = {
	{"input",	required_argument,	NULL, 'i'},
	{"format",	required_argument,	NULL, 'f'},
	{"cpp",		no_argument,		NULL, 'p'},
	{"verbose",	no_argument,		NULL, 'V'},
	{"bypass",	no_argument,		NULL, 'b'},
	{"dump",	no_argument,		NULL, 'd'},
	{"version",	no_argument,		NULL, 'v'},
	{"help",	no_argument,		NULL, 'h'},
	{NULL, 0, NULL, 0}
};

extern int compile_filter(char *file, int verbose, int bypass, int format,
			  bool invoke_cpp);

static void __noreturn help(void)
{
	printf("\nbpfc %s, a tiny BPF compiler\n", VERSION_STRING);
	puts("http://www.netsniff-ng.org\n\n"
	     "Usage: bpfc [options] || bpfc <program>\n"
	     "Options:\n"
	     "  -i|--input <program/->  Berkeley Packet Filter file/stdin\n"
	     "  -p|--cpp                Run bpf program through C preprocessor\n"
	     "  -f|--format <format>    Output format: C|netsniff-ng|xt_bpf|tcpdump\n"
	     "  -b|--bypass             Bypass filter validation (e.g. for bug testing)\n"
	     "  -V|--verbose            Be more verbose\n"
	     "  -d|--dump               Dump supported instruction table\n"
	     "  -v|--version            Print version and exit\n"
	     "  -h|--help               Print this help and exit\n\n"
	     "Examples:\n"
	     "  bpfc fubar\n"
	     "  bpfc fubar > foo (bpfc -f C -i fubar > foo) -->  netsniff-ng -f foo ...\n"
	     "  bpfc -f tcpdump -i fubar > foo -->  tcpdump -ddd like ...\n"
	     "  bpfc -f xt_bpf -b -p -i fubar\n"
	     "  iptables -A INPUT -m bpf --bytecode \"`./bpfc -f xt_bpf -i fubar`\" -j LOG\n"
	     "  bpfc -   (read from stdin)\n\n"
	     "Please report bugs to <bugs@netsniff-ng.org>\n"
	     "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
	     "Swiss federal institute of technology (ETH Zurich)\n"
	     "License: GNU GPL version 2.0\n"
	     "This is free software: you are free to change and redistribute it.\n"
	     "There is NO WARRANTY, to the extent permitted by law.\n");
	die();
}

static void __noreturn version(void)
{
	printf("\nbpfc %s, a tiny BPF compiler\n", VERSION_LONG);
	puts("http://www.netsniff-ng.org\n\n"
	     "Please report bugs to <bugs@netsniff-ng.org>\n"
	     "Copyright (C) 2011-2013 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,\n"
	     "Swiss federal institute of technology (ETH Zurich)\n"
	     "License: GNU GPL version 2.0\n"
	     "This is free software: you are free to change and redistribute it.\n"
	     "There is NO WARRANTY, to the extent permitted by law.\n");
	die();
}

int main(int argc, char **argv)
{
	int ret, verbose = 0, c, opt_index, bypass = 0, format = 0;
	bool invoke_cpp = false;
	char *file = NULL;

	setfsuid(getuid());
	setfsgid(getgid());

	if (argc == 1)
		help();

	while ((c = getopt_long(argc, argv, short_options,
			        long_options, &opt_index)) != EOF) {
		switch (c) {
		case 'h':
			help();
			break;
		case 'v':
			version();
			break;
		case 'V':
			verbose = 1;
			break;
		case 'p':
			invoke_cpp = true;
			break;
		case 'f':
			if (!strncmp(optarg, "C", 1) ||
			    !strncmp(optarg, "netsniff-ng", 11))
				format = 0;
			else if (!strncmp(optarg, "xt_bpf", 6))
				format = 1;
			else if (!strncmp(optarg, "tcpdump", 7))
				format = 2;
			else
				help();
			break;
		case 'b':
			bypass = 1;
			break;
		case 'd':
			bpf_dump_op_table();
			die();
		case 'i':
			file = xstrdup(optarg);
			break;
		case '?':
			switch (optopt) {
			case 'i':
			case 'f':
				panic("Option -%c requires an argument!\n",
				      optopt);
			default:
				if (isprint(optopt))
					printf("Unknown option character `0x%X\'!\n", optopt);
				die();
			}
		default:
			break;
		}
	}

	if (argc == 2)
		file = xstrdup(argv[1]);
	if (!file)
		panic("No Berkeley Packet Filter program specified!\n");

	ret = compile_filter(file, verbose, bypass, format, invoke_cpp);

	xfree(file);
	return ret;
}
tion><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:36:39 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-27 12:36:39 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/gpio/lsgpio.c?id=2fb78e89405f4321b86274a0c24b30896dd50529'>2fb78e89405f4321b86274a0c24b30896dd50529</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/gpio/lsgpio.c?id=2fb78e89405f4321b86274a0c24b30896dd50529'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=2fb78e89405f4321b86274a0c24b30896dd50529'>4de241e242441b80bd3f0022fc546bb07374571f</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/gpio/lsgpio.c?id=2fb78e89405f4321b86274a0c24b30896dd50529'>tools/gpio/lsgpio.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/gpio/lsgpio.c?id=dd3b9f25c867cb2507a45e436d6ede8eb08e7b05'>dd3b9f25c867cb2507a45e436d6ede8eb08e7b05</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/gpio/lsgpio.c?id=2fb78e89405f4321b86274a0c24b30896dd50529&amp;id2=dd3b9f25c867cb2507a45e436d6ede8eb08e7b05'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/gpio/lsgpio.c?id=c14024dbb156c8392908aaa822097d27c6af8ec8'>c14024dbb156c8392908aaa822097d27c6af8ec8</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/gpio/lsgpio.c?id=2fb78e89405f4321b86274a0c24b30896dd50529&amp;id2=c14024dbb156c8392908aaa822097d27c6af8ec8'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'for-linus' of git://git.kernel.dk/linux-block</div><div class='commit-msg'>Pull block fixes from Jens Axboe:
 "A set of fixes for this series. This contains:

   - Set of fixes for the nvme target code

   - A revert of patch from this merge window, causing a regression with
     WRITE_SAME on iSCSI targets at least.

   - A fix for a use-after-free in the new O_DIRECT bdev code.

   - Two fixes for the xen-blkfront driver"

* 'for-linus' of git://git.kernel.dk/linux-block:
  Revert "sd: remove __data_len hack for WRITE SAME"
  nvme-fc: use blk_rq_nr_phys_segments
  nvmet-rdma: Fix missing dma sync to nvme data structures
  nvmet: Call fatal_error from keep-alive timout expiration
  nvmet: cancel fatal error and flush async work before free controller
  nvmet: delete controllers deletion upon subsystem release
  nvmet_fc: correct logic in disconnect queue LS handling
  block: fix use after free in __blkdev_direct_IO
  xen-blkfront: correct maximum segment accounting
  xen-blkfront: feature flags handling adjustments
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=2fb78e89405f4321b86274a0c24b30896dd50529'>Diffstat</a> (limited to 'tools/gpio/lsgpio.c')</div><table summary='diffstat' class='diffstat'>