/*
 * netsniff-ng - the packet sniffing beast
 * Copyright 2009, 2010 Daniel Borkmann.
 * Copyright 2013 Tobias Klauser.
 * Subject to the GPL, version 2.
 */

#define _BSD_SOURCE
#include <ctype.h>
#include <stdio.h>
#include <stdarg.h>
#include <sys/ioctl.h>

#include "xutils.h"
#include "tprintf.h"
#include "die.h"
#include "locking.h"
#include "built_in.h"

#define term_trailing_size	5
#define term_starting_size	3

#define term_curr_size		(get_tty_size() - term_trailing_size)

static char buffer[1024];

static volatile size_t buffer_use = 0;

static struct spinlock buffer_lock;

static int get_tty_size(void)
{
#ifdef TIOCGSIZE
	struct ttysize ts = {0};

	return (ioctl(0, TIOCGSIZE, &ts) == 0 ?	ts.ts_cols : DEFAULT_TTY_SIZE);
#elif defined(TIOCGWINSZ)
	struct winsize ts;

	return (ioctl(0, TIOCGWINSZ, &ts) == 0 ? ts.ws_col : DEFAULT_TTY_SIZE);
#else
	return DEFAULT_TTY_SIZE;
#endif
}

static inline void __tprintf_flush_newline(void)
{
	int i;

	fputc('\n', stdout);
	for (i = 0; i < term_starting_size; ++i)
		fputc(' ', stdout);
}

static inline int __tprintf_flush_skip(char *buffer, int i, size_t max)
{
	int val = buffer[i];

	if (val == ' ' || val == ',')
		return 1;

	return 0;
}

static void __tprintf_flush(void)
{
	int i;
	static ssize_t line_count = 0;
	size_t term_len = term_curr_size;

	for (i = 0; i < buffer_use; ++i) {
		if (buffer[i] == '\n') {
			term_len = term_curr_size;
			line_count = -1;
		}

		if (line_count == term_len) {
			__tprintf_flush_newline();
			line_count = term_starting_size;

			while (i < buffer_use &&
			       __tprintf_flush_skip(buffer, i, buffer_use))
				i++;
		}

		fputc(buffer[i], stdout);
		line_count++;
	}

	fflush(stdout);
	buffer_use = 0;
}

void tprintf_flush(void)
{
	spinlock_lock(&buffer_lock);
	__tprintf_flush();
	spinlock_unlock(&buffer_lock);
}

void tprintf_init(void)
{
	spinlock_init(&buffer_lock);

	setvbuf(stdout, NULL, _IONBF, 0);
	setvbuf(stderr, NULL, _IONBF, 0);
}

void tprintf_cleanup(void)
{
	tprintf_flush();
	spinlock_destroy(&buffer_lock);
}

void tprintf(char *msg, ...)
{
	ssize_t ret;
	ssize_t avail;
	va_list vl;

	spinlock_lock(&buffer_lock);

	avail = sizeof(buffer) - buffer_use;
	bug_on(avail < 0);

	va_start(vl, msg);
	ret = vsnprintf(buffer + buffer_use, avail, msg, vl);
	va_end(vl);

	if (ret < 0)
		panic("vsnprintf screwed up in tprintf!\n");
	if (ret > sizeof(buffer))
		panic("No mem in tprintf left!\n");
	if (ret >= avail) {
		__tprintf_flush();

		avail = sizeof(buffer) - buffer_use;
		bug_on(avail < 0);

		va_start(vl, msg);
		ret = vsnprintf(buffer + buffer_use, avail, msg, vl);
		va_end(vl);

		if (ret < 0)
			panic("vsnprintf screwed up in tprintf!\n");
	}

	buffer_use += ret;

	spinlock_unlock(&buffer_lock);
}

void tputchar_safe(int c)
{
	unsigned char ch = (unsigned char)(c & 0xff);

	if (isprint(ch))
		tprintf("%c", ch);
	else
		tprintf("\\0x%02x", ch);
}

void tputs_safe(const char *str, size_t len)
{
	while (len--) {
		tputchar_safe(*str);
		str++;
	}
}
'/cgit.cgi/linux/net-next.git/commit/Documentation/misc-devices?id=d974f09ea4970d0299a8267111312b80adbd20e6'>misc-devices</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='d974f09ea4970d0299a8267111312b80adbd20e6'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><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'>2016-05-18 15:30:04 -0700</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-05-18 15:30:04 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/misc-devices?id=d974f09ea4970d0299a8267111312b80adbd20e6'>d974f09ea4970d0299a8267111312b80adbd20e6</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/misc-devices?id=d974f09ea4970d0299a8267111312b80adbd20e6'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=d974f09ea4970d0299a8267111312b80adbd20e6'>2b8874872d0fb1fd5e1f5addc343ec29cc98b3cd</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/misc-devices?id=d974f09ea4970d0299a8267111312b80adbd20e6'>Documentation/misc-devices</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/misc-devices?id=4a5219edcdae52bfb5eea0dfc2a7bd575961dad7'>4a5219edcdae52bfb5eea0dfc2a7bd575961dad7</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/misc-devices?id=d974f09ea4970d0299a8267111312b80adbd20e6&amp;id2=4a5219edcdae52bfb5eea0dfc2a7bd575961dad7'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/misc-devices?id=b3c8eb50383178f3a4dcf1dc867001156da6473d'>b3c8eb50383178f3a4dcf1dc867001156da6473d</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/misc-devices?id=d974f09ea4970d0299a8267111312b80adbd20e6&amp;id2=b3c8eb50383178f3a4dcf1dc867001156da6473d'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'stable/for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft</div><div class='commit-msg'>Pull iscsi_ibft updates from Konrad Rzeszutek Wilk:
 "The pull has two features - both of them expand the SysFS entries:

   - 'prefix-len' - which is subnet_mask_prefix of the iBFT header.

   - 'acpi_header' dir with: 'iBFT', OEM-ID (whatever it extracts from
     the iBFT header) and OEM_TABLE_ID (also whatever it extracts from
     the iBFT header).  This is to help NIC drivers to figure out during
     bootup how to deal with BIOS created iBFT tables (like by TianoCore
     UEFI implemenation)"

* 'stable/for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/ibft:
  ibft: Expose iBFT acpi header via sysfs
  iscsi_ibft: Add prefix-len attr and display netmask
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=d974f09ea4970d0299a8267111312b80adbd20e6'>Diffstat</a> (limited to 'Documentation/misc-devices')</div><table summary='diffstat' class='diffstat'>