time_utils.h File Reference

#include <glib.h>

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Data Structures
struct	tz_info
Defines
#define	TOTAL_TIMEZONES   33
#define	TZ_FILE   "/home/root/.timezone"
Functions
gchar *	get_timezone (void)
gint	get_timezone_index (const char *tzname, gboolean *is_dst)
gboolean	set_time_from_server (void)
void	set_time_utc (time_t utc_time)
gboolean	set_timezone (const char *tzname, gboolean is_dst)
Variables
static const tz_info	timezones [TOTAL_TIMEZONES]

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Define Documentation

#define TOTAL_TIMEZONES   33

Copyright (C) 2009 iRex Technologies B.V. All rights reserved.

Definition at line 34 of file time_utils.h.

Referenced by create_timezone_widget(), get_timezone_index(), and on_timezone_input().

#define TZ_FILE   "/home/root/.timezone"

Definition at line 35 of file time_utils.h.

Referenced by get_timezone(), on_reset_button_clicked(), and set_timezone().

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Function Documentation

gchar* get_timezone

(

void

)

Definition at line 128 of file time_utils.c.

References ERRORPRINTF, LOGPRINTF, and TZ_FILE.

Referenced by init_widgets().

{
    LOGPRINTF("entry");

    char actual_tzfile[256];
    memset(actual_tzfile, 0, sizeof(actual_tzfile));
    
    // get timezone reference
    if (readlink(TZ_FILE, actual_tzfile, sizeof(actual_tzfile)) == -1)
    {
        ERRORPRINTF("Can't dereference symlink %s, errno [%d][%s]", TZ_FILE, errno, strerror(errno));
        return NULL;
    }
    
    // check if it exists
    if (!g_file_test(actual_tzfile, G_FILE_TEST_IS_REGULAR))
    {
        ERRORPRINTF("Can't find symlink target %s", actual_tzfile);
        return NULL;
    }
    
    return g_path_get_basename(actual_tzfile);
}

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gint get_timezone_index	(	const char *	tzname,
		gboolean *	is_dst
	)

Definition at line 178 of file time_utils.c.

References DEFAULT_TIMEZONE_NAME, DST_FLAG, LOGPRINTF, timezones, TOTAL_TIMEZONES, and WARNPRINTF.

Referenced by init_widgets().

{
    LOGPRINTF("entry");

    gboolean is_dst;
    gint tzindex = -1;
    
    if (tzname == NULL)
    {
        tzname = DEFAULT_TIMEZONE_NAME;
        WARNPRINTF("No timezone given, use default [%s]", tzname);
    }
    
    int tzlength = strlen(tzname);
    is_dst = g_str_has_suffix(tzname, DST_FLAG);
    if (is_dst)
    {
        // ignore DST suffix
        tzlength -= strlen(DST_FLAG);
    }
    
    int i;
    for (i=0; i<TOTAL_TIMEZONES; i++) 
    {
        if (strncmp(tzname, timezones[i].tzname, tzlength) == 0)
        {
            tzindex = i;
            break;
        }
    }

    if (tzindex == -1)
    {
        WARNPRINTF("Can't find zoneinfo for [%s]", tzname);
        tzindex = 12; // default to GMT
        is_dst = FALSE;
    }
    
    if (dst)
    {
        *dst = is_dst;
    }
    
    return tzindex;
}

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gboolean set_time_from_server

(

void

)

Definition at line 238 of file time_utils.c.

References ERRORPRINTF, get_server_time(), LOGPRINTF, and set_time_utc().

{
    LOGPRINTF("entry");
    
    time_t utc_time = get_server_time();
    if (utc_time == 0) {
        ERRORPRINTF("Failed to get server time");
        return FALSE;
    }
    
    set_time_utc(utc_time);
    return TRUE;
}

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void set_time_utc

(

time_t

utc_time

)

Definition at line 225 of file time_utils.c.

References LOGPRINTF.

Referenced by set_time_from_server().

{
    LOGPRINTF("entry");
    
    struct timeval tp;
    gettimeofday(&tp, NULL);
    tp.tv_sec = utc_time;
    settimeofday(&tp, NULL);

    system("/sbin/hwclock -w -u");
}

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gboolean set_timezone	(	const char *	tzname,
		gboolean	is_dst
	)

Definition at line 153 of file time_utils.c.

References DST_FLAG, ERRORPRINTF, LOGPRINTF, TZ_FILE, and TZ_FILES_DIR.

Referenced by datetime_base_save_datetime().

{
    LOGPRINTF("entry");

    char actual_tzfile[256];

    snprintf(actual_tzfile, 256, "%s%s%s", TZ_FILES_DIR, tzname, is_dst ? DST_FLAG : "");
    LOGPRINTF("symlink %s to %s", actual_tzfile, TZ_FILE);
    if (g_file_test(TZ_FILE, G_FILE_TEST_EXISTS) && (unlink(TZ_FILE) != 0))
    {
        ERRORPRINTF("Can't remove %s", TZ_FILE);
        return FALSE;
    }

    if (symlink(actual_tzfile, TZ_FILE) != 0)
    {
        ERRORPRINTF("Can't create symlink from %s to %s", actual_tzfile, TZ_FILE);
        return FALSE;
    }

    return TRUE;    
}

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Variable Documentation

const tz_info timezones[TOTAL_TIMEZONES] [static]

Definition at line 44 of file time_utils.h.

Referenced by datetime_base_save_datetime(), get_timezone_index(), on_timezone_input(), and on_timezone_output().