hcid/lib.c

/* 
   BlueZ - Bluetooth protocol stack for Linux
   Copyright (C) 2000-2001 Qualcomm Incorporated
   
   Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   
   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;
   
   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY CLAIM,
   OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER
   RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
   NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE
   USE OR PERFORMANCE OF THIS SOFTWARE.
   
   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, COPYRIGHTS,
   TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS SOFTWARE IS DISCLAIMED.
*/
/*
 * $Id$
 */ 

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <unistd.h>
#include <netdb.h>
#include <signal.h>

#include "hcid.h"
#include "lib.h"

volatile sig_atomic_t __io_canceled;

/* 
 * Device name expansion 
 * 	%d - device id
 */
char * expand_name(char *dst, char *str, int dev_id)
{
	register int sp, np, olen;
	char *opt, buf[10];

	if (!str && !dst)
		return NULL;

	sp = np = 0;
	while (str[sp]) {
		switch (str[sp]) {
		case '%':
			opt = NULL;

			switch (str[sp+1]) {
			case 'd':
				sprintf(buf, "%d", dev_id);
				opt = buf;
				break;

			case 'h':
				opt = hcid.host_name;
				break;
			
			case '%':
				dst[np++] = str[sp++];
				/* fall through */
			default:
				sp++;
				continue;
             		}

			if (opt) {
				/* substitute */
				olen = strlen(opt);
                		memcpy(dst + np, opt, olen);
                		np += olen;
             		}
             		sp += 2;
             		continue;

		case '\\':
			sp++;
			/* fall through */
		default:
			dst[np++] = str[sp++];
			break;
		}
    }
    dst[np] = '\0';
    return dst;
}

/* Returns current host name */
char *get_host_name(void)
{
	char name[40];

	if (!gethostname(name, sizeof(name)-1)) {
		name[sizeof(name)-1] = 0;
		return strdup(name);
	} 
	return strdup("noname");
}

/* Functions to manipulate program title */
extern char **environ;
char	*title_start;	/* start of the proc title space */
char	*title_end;     /* end of the proc title space */
int	title_size;

void init_title(int argc, char *argv[], char *envp[], const char *name)
{
	int i;

	/*
	 *  Move the environment so settitle can use the space at
	 *  the top of memory.
	 */

	for (i = 0; envp[i]; i++);

	environ = (char **) malloc(sizeof (char *) * (i + 1));

	for (i = 0; envp[i]; i++)
		environ[i] = strdup(envp[i]);
	environ[i] = NULL;

	/*
	 *  Save start and extent of argv for set_title.
	 */

	title_start = argv[0];

	/*
	 *  Determine how much space we can use for set_title.  
	 *  Use all contiguous argv and envp pointers starting at argv[0]
		 */
	for (i=0; i<argc; i++)
		if (!i || title_end == argv[i])
			title_end = argv[i] + strlen(argv[i]) + 1;

	for (i=0; envp[i]; i++)
		if (title_end == envp[i])
			title_end = envp[i] + strlen(envp[i]) + 1;

	strcpy(title_start, name);
	title_start += strlen(name);
	title_size = title_end - title_start;
}

void set_title(const char *fmt, ...)
{
	char buf[255];
	va_list ap;

	memset(title_start,0,title_size);

	/* print the argument string */
	va_start(ap, fmt);
	vsprintf(buf, fmt, ap);
	va_end(ap);

	if (strlen(buf) > title_size - 1)
		buf[title_size - 1] = '\0';

	strcat(title_start, buf);
}