#include "cache.h"
#include "config.h"
#include <stdio.h>
#include <subcmd/help.h>
#include "../builtin.h"
#include "levenshtein.h"

static int autocorrect;
static struct cmdnames aliases;

static int perf_unknown_cmd_config(const char *var, const char *value,
				   void *cb __maybe_unused)
{
	if (!strcmp(var, "help.autocorrect"))
		autocorrect = perf_config_int(var,value);
	/* Also use aliases for command lookup */
	if (!prefixcmp(var, "alias."))
		add_cmdname(&aliases, var + 6, strlen(var + 6));

	return 0;
}

static int levenshtein_compare(const void *p1, const void *p2)
{
	const struct cmdname *const *c1 = p1, *const *c2 = p2;
	const char *s1 = (*c1)->name, *s2 = (*c2)->name;
	int l1 = (*c1)->len;
	int l2 = (*c2)->len;
	return l1 != l2 ? l1 - l2 : strcmp(s1, s2);
}

static int add_cmd_list(struct cmdnames *cmds, struct cmdnames *old)
{
	unsigned int i, nr = cmds->cnt + old->cnt;
	void *tmp;

	if (nr > cmds->alloc) {
		/* Choose bigger one to alloc */
		if (alloc_nr(cmds->alloc) < nr)
			cmds->alloc = nr;
		else
			cmds->alloc = alloc_nr(cmds->alloc);
		tmp = realloc(cmds->names, cmds->alloc * sizeof(*cmds->names));
		if (!tmp)
			return -1;
		cmds->names = tmp;
	}
	for (i = 0; i < old->cnt; i++)
		cmds->names[cmds->cnt++] = old->names[i];
	zfree(&old->names);
	old->cnt = 0;
	return 0;
}

const char *help_unknown_cmd(const char *cmd)
{
	unsigned int i, n = 0, best_similarity = 0;
	struct cmdnames main_cmds, other_cmds;

	memset(&main_cmds, 0, sizeof(main_cmds));
	memset(&other_cmds, 0, sizeof(main_cmds));
	memset(&aliases, 0, sizeof(aliases));

	perf_config(perf_unknown_cmd_config, NULL);

	load_command_list("perf-", &main_cmds, &other_cmds);

	if (add_cmd_list(&main_cmds, &aliases) < 0 ||
	    add_cmd_list(&main_cmds, &other_cmds) < 0) {
		fprintf(stderr, "ERROR: Failed to allocate command list for unknown command.\n");
		goto end;
	}
	qsort(main_cmds.names, main_cmds.cnt,
	      sizeof(main_cmds.names), cmdname_compare);
	uniq(&main_cmds);

	if (main_cmds.cnt) {
		/* This reuses cmdname->len for similarity index */
		for (i = 0; i < main_cmds.cnt; ++i)
			main_cmds.names[i]->len =
				levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4);

		qsort(main_cmds.names, main_cmds.cnt,
		      sizeof(*main_cmds.names), levenshtein_compare);

		best_similarity = main_cmds.names[0]->len;
		n = 1;
		while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len)
			++n;
	}

	if (autocorrect && n == 1) {
		const char *assumed = main_cmds.names[0]->name;

		main_cmds.names[0] = NULL;
		clean_cmdnames(&main_cmds);
		fprintf(stderr, "WARNING: You called a perf program named '%s', "
			"which does not exist.\n"
			"Continuing under the assumption that you meant '%s'\n",
			cmd, assumed);
		if (autocorrect > 0) {
			fprintf(stderr, "in %0.1f seconds automatically...\n",
				(float)autocorrect/10.0);
			poll(NULL, 0, autocorrect * 100);
		}
		return assumed;
	}

	fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd);

	if (main_cmds.cnt && best_similarity < 6) {
		fprintf(stderr, "\nDid you mean %s?\n",
			n < 2 ? "this": "one of these");

		for (i = 0; i < n; i++)
			fprintf(stderr, "\t%s\n", main_cmds.names[i]->name);
	}
end:
	exit(1);
}
154?h=nds-private-remove&amp;id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>ieee802154</a>/<a href='/cgit.cgi/linux/net-next.git/commit/net/ieee802154/netlink.c?h=nds-private-remove&amp;id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>netlink.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='4205e4786d0b9fc3b4fec7b1910cf645a0468307'/><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>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-10 14:01:05 +0100</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-16 13:20:05 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ieee802154/netlink.c?h=nds-private-remove&amp;id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>4205e4786d0b9fc3b4fec7b1910cf645a0468307</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/ieee802154/netlink.c?id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>685ccb486409197b936c785eb9d173c3edff45a1</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/ieee802154/netlink.c?h=nds-private-remove&amp;id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>net/ieee802154/netlink.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/ieee802154/netlink.c?h=nds-private-remove&amp;id=7e164ce4e8ecd7e9a58a83750bd3ee03125df154'>7e164ce4e8ecd7e9a58a83750bd3ee03125df154</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/ieee802154/netlink.c?h=nds-private-remove&amp;id=4205e4786d0b9fc3b4fec7b1910cf645a0468307&amp;id2=7e164ce4e8ecd7e9a58a83750bd3ee03125df154'>diff</a>)</td></tr></table>
<div class='commit-subject'>cpu/hotplug: Provide dynamic range for prepare stage</div><div class='commit-msg'>Mathieu reported that the LTTNG modules are broken as of 4.10-rc1 due to
the removal of the cpu hotplug notifiers.

Usually I don't care much about out of tree modules, but LTTNG is widely
used in distros. There are two ways to solve that:

1) Reserve a hotplug state for LTTNG

2) Add a dynamic range for the prepare states.

While #1 is the simplest solution, #2 is the proper one as we can convert
in tree users, which do not care about ordering, to the dynamic range as
well.

Add a dynamic range which allows LTTNG to request states in the prepare
stage.

Reported-and-tested-by: Mathieu Desnoyers &lt;mathieu.desnoyers@efficios.com&gt;
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Reviewed-by: Mathieu Desnoyers &lt;mathieu.desnoyers@efficios.com&gt;
Cc: Peter Zijlstra &lt;peterz@infradead.org&gt;
Cc: Sebastian Sewior &lt;bigeasy@linutronix.de&gt;
Cc: Steven Rostedt &lt;rostedt@goodmis.org&gt;
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701101353010.3401@nanos
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=4205e4786d0b9fc3b4fec7b1910cf645a0468307'>Diffstat</a> (limited to 'net/ieee802154/netlink.c')</div><table summary='diffstat' class='diffstat'>