barebox/common/misc.c

/*
 * (C) Copyright 2000-2003
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <common.h>
#include <errno.h>
#include <malloc.h>
#include <magicvar.h>
#include <globalvar.h>
#include <environment.h>
#include <led.h>
#include <of.h>
#include <restart.h>

int errno;
EXPORT_SYMBOL(errno);


const char *strerror(int errnum)
{
	static char errno_string[10];

#ifdef CONFIG_ERRNO_MESSAGES
	char *str;
	switch(errnum) {
	case	0		: str = "No error"; break;
	case	EPERM		: str = "Operation not permitted"; break;
	case	ENOENT		: str = "No such file or directory"; break;
	case	EIO		: str = "I/O error"; break;
	case	ENXIO		: str = "No such device or address"; break;
	case	E2BIG		: str = "Arg list too long"; break;
	case	ENOEXEC		: str = "Exec format error"; break;
	case	EBADF		: str = "Bad file number"; break;
	case	ENOMEM		: str = "Out of memory"; break;
	case	EACCES		: str = "Permission denied"; break;
	case	EFAULT		: str = "Bad address"; break;
	case	EBUSY		: str = "Device or resource busy"; break;
	case	EEXIST		: str = "File exists"; break;
	case	ENODEV		: str = "No such device"; break;
	case	ENOTDIR		: str = "Not a directory"; break;
	case	EISDIR		: str = "Is a directory"; break;
	case	EINVAL		: str = "Invalid argument"; break;
	case	ENOSPC		: str = "No space left on device"; break;
	case	ESPIPE		: str = "Illegal seek"; break;
	case	EROFS		: str = "Read-only file system"; break;
	case	ENAMETOOLONG	: str = "File name too long"; break;
	case	ENOSYS		: str = "Function not implemented"; break;
	case	ENOTEMPTY	: str = "Directory not empty"; break;
	case	EHOSTUNREACH	: str = "No route to host"; break;
	case	EINTR		: str = "Interrupted system call"; break;
	case	ENETUNREACH	: str = "Network is unreachable"; break;
	case	ENETDOWN	: str = "Network is down"; break;
	case	ETIMEDOUT	: str = "Connection timed out"; break;
#if 0 /* These are probably not needed */
	case	ENOTBLK		: str = "Block device required"; break;
	case	EFBIG		: str = "File too large"; break;
	case	EBADSLT		: str = "Invalid slot"; break;
	case	ENODATA		: str = "No data available"; break;
	case	ETIME		: str = "Timer expired"; break;
	case	ENONET		: str = "Machine is not on the network"; break;
	case	EADV		: str = "Advertise error"; break;
	case	ECOMM		: str = "Communication error on send"; break;
	case	EPROTO		: str = "Protocol error"; break;
	case	EBADMSG		: str = "Not a data message"; break;
	case	EOVERFLOW	: str = "Value too large for defined data type"; break;
	case	EBADFD		: str = "File descriptor in bad state"; break;
	case	EREMCHG		: str = "Remote address changed"; break;
	case	EMSGSIZE	: str = "Message too long"; break;
	case	EPROTOTYPE	: str = "Protocol wrong type for socket"; break;
	case	ENOPROTOOPT	: str = "Protocol not available"; break;
	case	EPROTONOSUPPORT	: str = "Protocol not supported"; break;
	case	ESOCKTNOSUPPORT	: str = "Socket type not supported"; break;
	case	EPFNOSUPPORT	: str = "Protocol family not supported"; break;
	case	EAFNOSUPPORT	: str = "Address family not supported by protocol"; break;
	case	EADDRINUSE	: str = "Address already in use"; break;
	case	EADDRNOTAVAIL	: str = "Cannot assign requested address"; break;
	case	ENETRESET	: str = "Network dropped connection because of reset"; break;
	case	ECONNABORTED	: str = "Software caused connection abort"; break;
	case	ECONNRESET	: str = "Connection reset by peer"; break;
	case	ENOBUFS		: str = "No buffer space available"; break;
	case	ECONNREFUSED	: str = "Connection refused"; break;
	case	EHOSTDOWN	: str = "Host is down"; break;
	case	EALREADY	: str = "Operation already in progress"; break;
	case	EINPROGRESS	: str = "Operation now in progress"; break;
	case	ESTALE		: str = "Stale NFS file handle"; break;
	case	EISNAM		: str = "Is a named type file"; break;
	case	EREMOTEIO	: str = "Remote I/O error"; break;
#endif
	default:
		sprintf(errno_string, "error %d", errnum);
		return errno_string;
	};

        return str;
#else
	sprintf(errno_string, "error %d", errnum);

	return errno_string;
#endif
}
EXPORT_SYMBOL(strerror);

const char *errno_str(void)
{
	return strerror(errno);
}
EXPORT_SYMBOL(errno_str);

void perror(const char *s)
{
#ifdef CONFIG_ERRNO_MESSAGES
	printf("%s: %s\n", s, errno_str());
#else
	printf("%s returned with %d\n", s, errno);
#endif
}
EXPORT_SYMBOL(perror);

void (*do_execute)(void *func, int argc, char *argv[]);
EXPORT_SYMBOL(do_execute);

static char *model;

/*
 * The model is the verbose name of a board. It can contain
 * whitespaces, uppercase/lowcer letters, digits, ',', '.'
 * '-', '_'
 */
void barebox_set_model(const char *__model)
{
	if (IS_ENABLED(CONFIG_GLOBALVAR)) {
		globalvar_add_simple("model", __model);
	} else {
		free(model);
		model = xstrdup(__model);
	}
}
EXPORT_SYMBOL(barebox_set_model);

const char *barebox_get_model(void)
{
	if (IS_ENABLED(CONFIG_GLOBALVAR))
		return getenv("global.model");

	return model;
}
EXPORT_SYMBOL(barebox_get_model);

BAREBOX_MAGICVAR_NAMED(global_model, global.model, "Product name of this hardware");

static char *hostname;

/*
 * The hostname is supposed to be the shortname of a board. It should
 * contain only lowercase letters, numbers, '-', '_'. No whitespaces
 * allowed.
 */
void barebox_set_hostname(const char *__hostname)
{
	if (IS_ENABLED(CONFIG_GLOBALVAR)) {
		globalvar_add_simple("hostname", __hostname);
	} else {
		free(hostname);
		hostname = xstrdup(__hostname);
	}
}

const char *barebox_get_hostname(void)
{
	if (IS_ENABLED(CONFIG_GLOBALVAR))
		return getenv("global.hostname");

	return hostname;
}
EXPORT_SYMBOL(barebox_get_hostname);

BAREBOX_MAGICVAR_NAMED(global_hostname, global.hostname,
		"shortname of the board. Also used as hostname for DHCP requests");

void __noreturn panic(const char *fmt, ...)
{
	va_list args;
	va_start(args, fmt);
	vprintf(fmt, args);
	putchar('\n');
	va_end(args);

	dump_stack();

	led_trigger(LED_TRIGGER_PANIC, TRIGGER_ENABLE);

	if (IS_ENABLED(CONFIG_PANIC_HANG)) {
		hang();
	} else {
		udelay(100000);	/* allow messages to go out */
		restart_machine();
	}
}
EXPORT_SYMBOL(panic);