/*
 * Helper functions for handling target threads/cpus
 *
 * Copyright (C) 2012, LG Electronics, Namhyung Kim <namhyung.kim@lge.com>
 *
 * Released under the GPL v2.
 */

#include "target.h"
#include "util.h"
#include "debug.h"

#include <pwd.h>
#include <string.h>


enum target_errno target__validate(struct target *target)
{
	enum target_errno ret = TARGET_ERRNO__SUCCESS;

	if (target->pid)
		target->tid = target->pid;

	/* CPU and PID are mutually exclusive */
	if (target->tid && target->cpu_list) {
		target->cpu_list = NULL;
		if (ret == TARGET_ERRNO__SUCCESS)
			ret = TARGET_ERRNO__PID_OVERRIDE_CPU;
	}

	/* UID and PID are mutually exclusive */
	if (target->tid && target->uid_str) {
		target->uid_str = NULL;
		if (ret == TARGET_ERRNO__SUCCESS)
			ret = TARGET_ERRNO__PID_OVERRIDE_UID;
	}

	/* UID and CPU are mutually exclusive */
	if (target->uid_str && target->cpu_list) {
		target->cpu_list = NULL;
		if (ret == TARGET_ERRNO__SUCCESS)
			ret = TARGET_ERRNO__UID_OVERRIDE_CPU;
	}

	/* PID and SYSTEM are mutually exclusive */
	if (target->tid && target->system_wide) {
		target->system_wide = false;
		if (ret == TARGET_ERRNO__SUCCESS)
			ret = TARGET_ERRNO__PID_OVERRIDE_SYSTEM;
	}

	/* UID and SYSTEM are mutually exclusive */
	if (target->uid_str && target->system_wide) {
		target->system_wide = false;
		if (ret == TARGET_ERRNO__SUCCESS)
			ret = TARGET_ERRNO__UID_OVERRIDE_SYSTEM;
	}

	/* THREAD and SYSTEM/CPU are mutually exclusive */
	if (target->per_thread && (target->system_wide || target->cpu_list)) {
		target->per_thread = false;
		if (ret == TARGET_ERRNO__SUCCESS)
			ret = TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD;
	}

	return ret;
}

enum target_errno target__parse_uid(struct target *target)
{
	struct passwd pwd, *result;
	char buf[1024];
	const char *str = target->uid_str;

	target->uid = UINT_MAX;
	if (str == NULL)
		return TARGET_ERRNO__SUCCESS;

	/* Try user name first */
	getpwnam_r(str, &pwd, buf, sizeof(buf), &result);

	if (result == NULL) {
		/*
		 * The user name not found. Maybe it's a UID number.
		 */
		char *endptr;
		int uid = strtol(str, &endptr, 10);

		if (*endptr != '\0')
			return TARGET_ERRNO__INVALID_UID;

		getpwuid_r(uid, &pwd, buf, sizeof(buf), &result);

		if (result == NULL)
			return TARGET_ERRNO__USER_NOT_FOUND;
	}

	target->uid = result->pw_uid;
	return TARGET_ERRNO__SUCCESS;
}

/*
 * This must have a same ordering as the enum target_errno.
 */
static const char *target__error_str[] = {
	"PID/TID switch overriding CPU",
	"PID/TID switch overriding UID",
	"UID switch overriding CPU",
	"PID/TID switch overriding SYSTEM",
	"UID switch overriding SYSTEM",
	"SYSTEM/CPU switch overriding PER-THREAD",
	"Invalid User: %s",
	"Problems obtaining information for user %s",
};

int target__strerror(struct target *target, int errnum,
			  char *buf, size_t buflen)
{
	int idx;
	const char *msg;

	BUG_ON(buflen == 0);

	if (errnum >= 0) {
		str_error_r(errnum, buf, buflen);
		return 0;
	}

	if (errnum <  __TARGET_ERRNO__START || errnum >= __TARGET_ERRNO__END)
		return -1;

	idx = errnum - __TARGET_ERRNO__START;
	msg = target__error_str[idx];

	switch (errnum) {
	case TARGET_ERRNO__PID_OVERRIDE_CPU ...
	     TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD:
		snprintf(buf, buflen, "%s", msg);
		break;

	case TARGET_ERRNO__INVALID_UID:
	case TARGET_ERRNO__USER_NOT_FOUND:
		snprintf(buf, buflen, msg, target->uid_str);
		break;

	default:
		/* cannot reach here */
		break;
	}

	return 0;
}
idden' name='id2' value='a810007afe239d59c1115fcaa06eb5b480f876e9'/><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><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=507053d23b886fdedc8336ca2233883fe4c82aa2&amp;id2=a810007afe239d59c1115fcaa06eb5b480f876e9'>Diffstat</a> (limited to 'include/net')</div><table summary='diffstat' class='diffstat'>nfo'>
<tr><th>author</th><td>Stephan Mueller &lt;smueller@chronox.de&gt;</td><td class='right'>2016-10-21 04:54:22 +0200</td></tr>
<tr><th>committer</th><td>Jonathan Corbet &lt;corbet@lwn.net&gt;</td><td class='right'>2016-12-13 16:37:54 -0700</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/input?h=nds-private-remove&amp;id=3b72c814a8e8cd638e1ba0da4dfce501e9dff5af'>3b72c814a8e8cd638e1ba0da4dfce501e9dff5af</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings/input?id=3b72c814a8e8cd638e1ba0da4dfce501e9dff5af'>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=3b72c814a8e8cd638e1ba0da4dfce501e9dff5af'>a79b261dd9f10bd3525ed97d1bb54058fc6d9a1e</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings/input?h=nds-private-remove&amp;id=3b72c814a8e8cd638e1ba0da4dfce501e9dff5af'>include/dt-bindings/input</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings/input?h=nds-private-remove&amp;id=868c97a846a73e937d835b09b8c885a69df50ec8'>868c97a846a73e937d835b09b8c885a69df50ec8</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings/input?h=nds-private-remove&amp;id=3b72c814a8e8cd638e1ba0da4dfce501e9dff5af&amp;id2=868c97a846a73e937d835b09b8c885a69df50ec8'>diff</a>)</td></tr></table>
<div class='commit-subject'>crypto: doc - convert crypto API documentation to Sphinx</div><div class='commit-msg'>With the conversion of the kernel crypto API DocBook to Sphinx, the
monolithic document is broken up into individual documents. The
documentation is unchanged with the exception of a slight reordering to
keep the individual document parts self-contained.

Signed-off-by: Stephan Mueller &lt;smueller@chronox.de&gt;
Signed-off-by: Jonathan Corbet &lt;corbet@lwn.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=3b72c814a8e8cd638e1ba0da4dfce501e9dff5af'>Diffstat</a> (limited to 'include/dt-bindings/input')</div><table summary='diffstat' class='diffstat'>