/*
 * 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 "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 *buf, int i)
{
	int val = buf[i];

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

	return 0;
}

static void __tprintf_flush(void)
{
	size_t i;
	static ssize_t line_count = 0;
	ssize_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))
				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 ((size_t) 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++;
	}
}
cgi/linux/net-next.git/commit/Documentation?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>Documentation</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>devicetree</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree/bindings?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>bindings</a>/<a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree/bindings/mtd?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>mtd</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'/><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'>2016-04-03 07:06:53 -0500</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-04-03 07:06:53 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree/bindings/mtd?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation/devicetree/bindings/mtd?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>a93a93e01dcb4203d545ef61edcb5c4236b49ded</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation/devicetree/bindings/mtd?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>Documentation/devicetree/bindings/mtd</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree/bindings/mtd?id=17084b7e07909d3a8d51b66b7dfb50a2083a2685'>17084b7e07909d3a8d51b66b7dfb50a2083a2685</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/devicetree/bindings/mtd?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f&amp;id2=17084b7e07909d3a8d51b66b7dfb50a2083a2685'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation/devicetree/bindings/mtd?id=353def94606fda16d9ae1761b4b0583286481ec5'>353def94606fda16d9ae1761b4b0583286481ec5</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation/devicetree/bindings/mtd?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f&amp;id2=353def94606fda16d9ae1761b4b0583286481ec5'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</div><div class='commit-msg'>Pull core kernel fixes from Ingo Molnar:
 "This contains the nohz/atomic cleanup/fix for the fetch_or() ugliness
  you noted during the original nohz pull request, plus there's also
  misc fixes:

   - fix liblockdep build bug
   - fix uapi header build bug
   - print more lockdep hash collision info to help debug recent reports
     of hash collisions
   - update MAINTAINERS email address"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  MAINTAINERS: Update my email address
  locking/lockdep: Print chain_key collision information
  uapi/linux/stddef.h: Provide __always_inline to userspace headers
  tools/lib/lockdep: Fix unsupported 'basename -s' in run_tests.sh
  locking/atomic, sched: Unexport fetch_or()
  timers/nohz: Convert tick dependency mask to atomic_t
  locking/atomic: Introduce atomic_fetch_or()
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=7b367f5dba5c5162a7308e85d3fc9170b0cb3e5f'>Diffstat</a> (limited to 'Documentation/devicetree/bindings/mtd')</div><table summary='diffstat' class='diffstat'>