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osdhud.c
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/*
* Copyright (C) 2014,2015 by attila <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for
* any purpose with or without fee is hereby granted, provided that the
* above copyright notice and this permission notice appear in all
* copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, 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.
*/
/*
* osdhud - xosd-based heads up system status display
*/
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <sys/stdint.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <syslog.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/time.h>
#include <time.h>
#include <sys/resource.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <net/if.h>
#include <sys/un.h>
#include <xosd.h>
#include <Judy.h>
#include <err.h>
#include "config.h"
#include "version.h"
#include "movavg.h"
#include "osdhud.h"
volatile sig_atomic_t interrupted = 0; /* got a SIGINT */
volatile sig_atomic_t restart_req = 0; /* got a SIGHUP */
#ifdef SIGINFO
volatile sig_atomic_t bang_bang = 0; /* got a SIGINFO */
#endif
#define WHITESPACE " \t\n\r"
#define safe_percent(a,b) b? a/b: 0; /* don't divide by zero */
#define ipercent(v) (int)(100 * (v)) /* 0.05 -> 5 */
/*#define ENABLE_ALERTS 1*/
char *
err_str(struct osdhud_state *state, int err)
{
state->errbuf[0] = 0;
(void) strerror_r(err,state->errbuf,sizeof(state->errbuf));
return state->errbuf;
}
void
die(struct osdhud_state *state, char *msg)
{
if (state->foreground)
err(1,"%s",NULLS(msg));
syslog(LOG_ERR,"FATAL: %s",msg);
closelog();
exit(1);
}
void
update_net_statistics(struct osdhud_state *state, u_int64_t delta_ibytes,
u_int64_t delta_obytes, u_int64_t delta_ipackets,
u_int64_t delta_opackets)
{
if (state->delta_t) {
float dt = (float)state->delta_t / 1000.0;
state->net_ikbps =
(movavg_add(state->ikbps_ma,delta_ibytes) / dt)/KILO;
state->net_okbps =
(movavg_add(state->okbps_ma,delta_obytes) / dt)/KILO;
state->net_ipxps =
movavg_add(state->ipxps_ma,delta_ipackets) / dt;
state->net_opxps =
movavg_add(state->opxps_ma,delta_opackets) / dt;
DSPEW("net %s bytes in += %llu -> %.2f / %f secs => %.2f",
state->net_iface,delta_ibytes,movavg_val(state->ikbps_ma),
dt,state->net_ikbps);
DSPEW("net %s bytes out += %llu -> %.2f / %f secs => %.2f",
state->net_iface,delta_obytes,movavg_val(state->okbps_ma),
dt,state->net_okbps);
DSPEW("net %s packets in += %llu -> %.2f / %f secs => %.2f",
state->net_iface,delta_ipackets,
movavg_val(state->ipxps_ma),dt,state->net_ipxps);
DSPEW("net %s packets out += %llu -> %.2f / %f secs => %.2f",
state->net_iface,delta_opackets,
movavg_val(state->opxps_ma),dt,state->net_opxps);
}
}
void
clear_net_statistics(struct osdhud_state *state)
{
state->net_ikbps = state->net_ipxps =
state->net_okbps = state->net_opxps = 0;
state->net_tot_ibytes = state->net_tot_obytes =
state->net_tot_ipackets = state->net_tot_opackets = 0;
state->net_peak_kbps = state->net_peak_pxps = 0;
movavg_clear(state->ikbps_ma);
movavg_clear(state->okbps_ma);
movavg_clear(state->ipxps_ma);
movavg_clear(state->opxps_ma);
}
void
update_disk_statistics(struct osdhud_state *state, u_int64_t delta_rbytes,
u_int64_t delta_wbytes, u_int64_t delta_reads,
u_int64_t delta_writes)
{
if (state->delta_t) {
float dt = (float)state->delta_t / 1000.0;
state->disk_rkbps =
(movavg_add(state->rbdisk_ma,delta_rbytes)/dt)/KILO;
state->disk_wkbps =
(movavg_add(state->wbdisk_ma,delta_wbytes)/dt)/KILO;
state->disk_rxps =
movavg_add(state->rxdisk_ma,delta_reads) / dt;
state->disk_wxps =
movavg_add(state->wxdisk_ma,delta_writes) / dt;
}
}
unsigned long
time_in_microseconds(void)
{
struct timeval tv = { .tv_sec=0, .tv_usec=0 };
if (gettimeofday(&tv,NULL)) {
perror("gettimeofday");
exit(1);
}
return (tv.tv_sec * 1000000) + tv.tv_usec;
}
unsigned long
time_in_milliseconds(void)
{
unsigned long usecs = time_in_microseconds();
return usecs / 1000;
}
/*
* Turn a number of seconds elapsed into a human-readable string.
* e.g. "10 days 1 hour 23 mins 2 secs". We have an snprintf-style
* API: buf,bufsiz specify a buffer and its size. If the resulting
* string's length is less than bufsiz then buf was big enough and
* contains a NUL-terminatd string whose length is our return value.
* If our return value is greater than bufsiz then buf was too small.
* Sadly our return value is not useful for determining how large to
* make buf, but in practice anything over 35 bytes should be large
* enough.
*/
int
elapsed(char *buf, int bufsiz, unsigned long secs)
{
unsigned long days;
unsigned long hours;
unsigned long mins;
size_t nleft = bufsiz;
size_t off = 0;
days = secs / SECSPERDAY;
secs %= SECSPERDAY;
hours = secs / SECSPERHOUR;
secs %= SECSPERHOUR;
mins = secs / SECSPERMIN;
secs %= SECSPERMIN;
#define catsup(var) \
if (var) { \
size_t _catsup_n; \
char _catsup_u[10] = #var; \
if (off) { \
if (nleft <= 2) { \
off = bufsiz+1; \
goto DONE; \
} \
(void) strlcat(&buf[off]," ",nleft); \
nleft -= 1; \
off += 1; \
} \
if (var == 1) _catsup_u[strlen(#var)-1] = 0; \
_catsup_n = snprintf( \
&buf[off],nleft,"%lu %s",var,_catsup_u); \
if (_catsup_n >= nleft) { \
off = bufsiz+1; \
goto DONE; \
} \
off += _catsup_n; \
nleft -= _catsup_n; \
}
catsup(days);
catsup(hours);
catsup(mins);
catsup(secs);
#undef catsup
DONE:
return off;
}
/*
* Probe data and gather statistics
*
* This function invokes probe_xxx() routines defined in the per-OS
* modules, e.g. openbsd.c, freebsd.c
*/
void
probe(struct osdhud_state *state)
{
unsigned long now = time_in_milliseconds();
state->delta_t = now - state->last_t;
state->last_t = now;
probe_load(state);
probe_mem(state);
probe_swap(state);
probe_net(state);
/*probe_disk(state);*/
probe_battery(state);
probe_temperature(state);
probe_uptime(state);
}
/*
* Display Routines
*/
char *
reading_to_color(float percent)
{
static char *colors[] = {
"green", "yellow", "orange", "red", "violet"
};
int severity;
if (percent <= 0.25)
severity = 0;
else if (percent <= 0.5)
severity = 1;
else if (percent <= 0.75)
severity = 2;
else if (percent <= 1.0)
severity = 3;
else
severity = 4;
return colors[severity];
}
xosd *
osd_to_use(struct osdhud_state *state, int do_color, float reading)
{
int off;
xosd *osd;
off = state->disp_line++;
assert(off < state->nlines);
osd = state->osds[off];
if (do_color) {
char *color;
color = reading_to_color(reading);
if (xosd_set_colour(osd, color))
syslog(LOG_WARNING,
"could not set osd[%d] color to %s (%f)",
off,color,reading);
}
return osd;
}
void
display_load(struct osdhud_state *state)
{
float percent = safe_percent(state->load_avg,state->max_load_avg);
xosd_display(osd_to_use(state,1,percent),0,XOSD_printf,"load: %.2f",
state->load_avg);
if (state->max_load_avg)
xosd_display(osd_to_use(state,1,percent),0,XOSD_percentage,
ipercent(percent));
}
void
display_mem(struct osdhud_state *state)
{
xosd_display(osd_to_use(state,1,state->mem_used_percent),0,
XOSD_printf,"mem: %d%%",ipercent(state->mem_used_percent));
xosd_display(osd_to_use(state,1,state->mem_used_percent),0,
XOSD_percentage,ipercent(state->mem_used_percent));
}
void
display_swap(struct osdhud_state *state)
{
if (!state->nswap)
return;
xosd_display(osd_to_use(state,1,state->swap_used_percent),0,XOSD_printf,
"swap: %d%%",ipercent(state->swap_used_percent));
xosd_display(osd_to_use(state,1,state->swap_used_percent),0,
XOSD_percentage,ipercent(state->swap_used_percent));
}
void
display_net(struct osdhud_state *state)
{
char *iface = state->net_iface? state->net_iface: "-";
int left, off, n;
char label[256];
char details[1024];
float net_kbps = state->net_ikbps + state->net_okbps;
float net_pxps = state->net_ipxps + state->net_opxps;
char unit = 'k';
float unit_div = 1.0;
float max_kbps = ((float)state->net_speed_mbits / 8.0) * KILO;
float raw_percent = safe_percent(net_kbps,max_kbps);
int percent = ipercent(raw_percent);
VSPEW("display_net %s net_speed_mbits %d max_kbps %f",
iface,state->net_speed_mbits,max_kbps);
memset(label,0,sizeof(label));
memset(details,0,sizeof(details));
/*
* If there are gigabytes or megabytes flying by then
* switch to the appropriate unit.
*/
if (net_kbps > state->net_peak_kbps)
state->net_peak_kbps = net_kbps;
if (net_pxps > state->net_peak_pxps)
state->net_peak_pxps = net_pxps;
if (net_kbps > MEGA) {
unit = 'g';
unit_div = MEGA;
} else if (net_kbps > KILO) {
unit = 'm';
unit_div = KILO;
}
/* Put together the label */
if (!max_kbps)
assert_snprintf(label,"net (%s):",iface);
else
assert_snprintf(label,"net (%s %dmb/s):",iface,
state->net_speed_mbits);
/* Put together the details string, as short as possible */
if ((unsigned long)net_kbps) {
left = sizeof(details);
off = 0;
if (max_kbps && percent) {
if (percent <= 100)
n = snprintf(&details[off],left,"%3d%% ",
percent);
else
/*
* This must be because max_kbps is
* wrong, which can happen if my guess
* is wrong or if the user gives us a
* value for -X that is wrong.
*/
n = snprintf(&details[off],left,"> 100%%(!) ");
assert(n < left);
left -= n;
off += n;
}
n = snprintf(&details[off],left,"%lu %cB/s (%lu px/s)",
(unsigned long)(net_kbps/unit_div),unit,
(unsigned long)net_pxps);
assert(n < left);
left -= n;
off += n;
} else {
assert_strlcpy(details,TXT__QUIET_);
}
xosd_display(osd_to_use(state,1,raw_percent),0,XOSD_printf,"%s %s",
label,details);
if (max_kbps)
xosd_display(osd_to_use(state,1,raw_percent),0,XOSD_percentage,
percent);
}
void
display_disk(struct osdhud_state *state)
{
}
void
display_battery(struct osdhud_state *state)
{
char *charging = state->battery_state[0] ?
state->battery_state : TXT__UNKNOWN_;
char mins[128] = { 0 };
float battery_used;
if (state->battery_missing)
return;
if (state->battery_time < 0) {
assert_strlcpy(mins,TXT_TIME_UNKNOWN);
} else {
assert_elapsed(mins,state->battery_time*60);
}
/* We want the color based on the percentage used, not remaining: */
battery_used = 1.0 - ((float)state->battery_life / 100.0);
xosd_display(osd_to_use(state,1,battery_used),0,XOSD_printf,
"battery: %s, %d%% charged (%s)",charging,
state->battery_life,mins);
xosd_display(osd_to_use(state,1,battery_used),0,XOSD_percentage,
state->battery_life);
}
void
display_temperature(struct osdhud_state *state)
{
float percent = safe_percent(state->temperature,state->max_temperature);
xosd_display(osd_to_use(state,1,percent),0,XOSD_printf,
"temp: %.0f degC (%s)", state->temperature,
state->temp_sensor_name);
xosd_display(osd_to_use(state,1,percent),0,XOSD_percentage,
ipercent(percent));
}
void
display_uptime(struct osdhud_state *state)
{
if (state->sys_uptime) {
unsigned long secs = state->sys_uptime;
char upbuf[64] = { 0 };
assert_elapsed(upbuf,secs);
xosd_display(osd_to_use(state,0,0),0,XOSD_printf,
"%s up %s",state->hostname,upbuf);
}
}
void
display_message(struct osdhud_state *state)
{
if (!state->message_seen && state->message[0]) {
xosd_display(osd_to_use(state,0,0),0,XOSD_printf,"%s",
state->message);
state->message_seen = 1;
} else {
xosd_display(osd_to_use(state,0,0),0,XOSD_printf,"");
}
}
void
display_hudmeta(struct osdhud_state *state)
{
unsigned int now = time_in_milliseconds();
unsigned int dt = now - state->t0_msecs;
unsigned int left = (dt < state->duration_msecs) ?
state->duration_msecs - dt : 0;
unsigned int left_secs = (left + 500) / 1000;
xosd *osd = state->osd_bot;
char now_str[512] = { 0 };
char left_s[512] = { 0 };
if (state->time_fmt) {
time_t now = time(NULL);
struct tm ltime = {
.tm_sec = 0, .tm_min = 0, .tm_hour = 0, .tm_mday = 0,
.tm_mon = 0, .tm_year = 0, .tm_wday = 0, .tm_yday = 0,
.tm_isdst = 0, .tm_gmtoff = 0, .tm_zone = NULL
};
(void) localtime_r(&now,<ime);
assert(strftime(now_str,sizeof(now_str),state->time_fmt,
<ime) > 0);
}
if (state->stuck) {
char *txt = (state->message[0] && state->alerts_mode) ?
TXT__ALERT_ : TXT__STUCK_;
assert_strlcpy(left_s,txt);
} else if (state->countdown) {
if (left_secs)
assert_snprintf(left_s,"hud down in %d",left_secs);
else
assert_strlcpy(left_s,TXT__BLINK_);
}
if (state->time_fmt)
xosd_display(osd,0,XOSD_printf,"%s%s%s%s",now_str,
left_s[0]? " [": "",left_s,left_s[0]? "]":"");
else if (left_s[0])
xosd_display(osd,0,XOSD_printf,"[%s]",left_s);
}
/*
* Display the HUD
*/
void
display(struct osdhud_state *state)
{
state->disp_line = 0;
display_uptime(state);
display_load(state);
display_mem(state);
display_swap(state);
display_net(state);
display_disk(state);
display_battery(state);
display_temperature(state);
display_message(state);
display_hudmeta(state);
}
#define OSDHUD_OPTIONS "d:p:P:vf:s:i:T:X:m:M:knDUSNFCwhgaAt?"
#define USAGE_MSG "usage: %s [-vgtkFDUSNCwh?] [-d msec] [-p msec] [-P msec]\n\
[-f font] [-s path] [-i iface] [-T fmt] [-m sensor_name] [-M max_temp]\n\
-v verbose | -k kill server | -F run in foreground\n\
-D down HUD | -U up HUD | -S stick HUD | -N unstick HUD\n\
-g debug mode | -t toggle mode | -w don't show swap\n\
-n don't show HUD on startup | -C display HUD countdown\n\
-h,-? display this\n\
-m name name of temp. sensor to use (def: first one found)\n\
to see the available sensors do: -m list\n\
-M degC set our idea of the max temperature in degC (def: 100)\n\
-T fmt show time using strftime fmt (def: %%Y-%%m-%%d %%H:%%M:%%S)\n\
-d msec leave HUD visible for millis (def: 2000)\n\
-p msec millis between sampling when HUD is up (def: 100)\n\
-P msec millis between sampling when HUD is down (def: 100)\n\
-f font (def: "DEFAULT_FONT")\n\
-s path path to Unix-domain socket (def: ~/.%s_%s.sock)\n\
-i iface network interface to watch\n\
-X mb/s fix max net link speed in mbit/sec (def: query interface)\n"
int
usage(struct osdhud_state *state, char *msg)
{
int fail = 0;
if (!state->argv0) {
syslog(LOG_WARNING,"client message error: %s",msg);
fail = 1;
} else {
if (msg)
fprintf(stderr,"%s ERROR: %s\n",state->argv0,msg);
else {
fprintf(stderr,"%s %s: system status HUD\n",
state->argv0,VERSION);
fprintf(stderr,USAGE_MSG,state->argv0,
state->argv0,VERSION);
}
exit(1);
}
return fail;
}
/*
* Parse command-line arguments into struct osdhud_state structure
*/
int
parse(struct osdhud_state *state, int argc, char **argv)
{
int fail = 0;
int ch = -1;
if (!state->argv0) {
optreset = 1; /* c.f. man getopt(3) */
optind = 1;
}
DBG2("parse: argc=%d argv@%p",argc,argv);
while ((ch = getopt(argc,argv,OSDHUD_OPTIONS)) != -1) {
DBG1("option ch: %c",ch);
switch (ch) {
case 'd': /* duration in milliseconds */
if (sscanf(optarg,"%d",&state->display_msecs) != 1)
fail = usage(state,"bad value for -d");
DBG2("parsed -%c %d",ch,state->display_msecs);
break;
case 'p': /* inter-probe pause in milliseconds */
if (sscanf(optarg,"%d",&state->short_pause_msecs) != 1)
fail = usage(state,"bad value for -p");
DBG2("parsed -%c %d",ch,state->short_pause_msecs);
break;
case 'P':
if (sscanf(optarg,"%d",&state->long_pause_msecs) != 1)
fail = usage(state,"bad value for -P");
DBG2("parsed -%c %d",ch,state->long_pause_msecs);
break;
case 'T':
state->time_fmt = strdup(optarg);
DBG2("parsed -%c %s",ch,state->time_fmt);
break;
case 'm':
if (!strcmp(optarg,"list")) {
print_temperature_sensors();
exit(1);
}
state->temp_sensor_name = strdup(optarg);
DBG2("parsed -%c %s",ch,state->temp_sensor_name);
break;
case 'M':
if (sscanf(optarg,"%f",&state->max_temperature) != 1)
fail = usage(state,"bad value for -M");
break;
case 'v': /* verbose */
state->verbose++;
DBG2("parsed -%c => %d",ch,state->verbose);
break;
case 'f': /* font */
state->font = strdup(optarg);
DBG2("parsed -%c %s",ch,state->font);
break;
case 's': /* path to unix socket */
state->sock_path = strdup(optarg);
DBG2("parsed -%c %s",ch,state->sock_path);
break;
case 'i':
/* network iface of interest */
state->net_iface = strdup(optarg);
DBG2("parsed -%c %s",ch,state->net_iface);
break;
case 'X':
if (sscanf(optarg,"%d",&state->net_speed_mbits) != 1)
fail = usage(state,"bad value for -X");
DBG2("parsed -%c %d",ch,state->net_speed_mbits);
break;
case 'k':
state->kill_server = 1;
DBG1("parsed -%c",ch);
break;
case 'D':
state->down_hud = 1;
DBG1("parsed -%c",ch);
break;
case 'U':
state->up_hud = 1;
DBG1("parsed -%c",ch);
break;
case 'S':
state->stick_hud = 1;
DBG1("parsed -%c",ch);
break;
case 'N':
state->unstick_hud = 1;
DBG1("parsed -%c",ch);
break;
case 'F':
state->foreground = 1;
DBG1("parsed -%c",ch);
break;
case 'g':
state->debug = 1;
DBG1("parsed -%c",ch);
break;
case 'C':
state->countdown = 1;
DBG1("parsed -%c",ch);
break;
case 'w':
state->nswap = 0;
DBG1("parsed -%c",ch);
break;
case 'n':
state->quiet_at_start = 1;
DBG1("parsed -%c",ch);
break;
case 't':
state->toggle_mode = 1;
DBG1("parsed -%c",ch);
break;
case 'a':
state->alerts_mode = 1;
DBG1("parsed -%c",ch);
break;
case 'A':
state->cancel_alerts = 1;
DBG1("parsed -%c",ch);
break;
case '?': /* help */
case 'h': /* ditto */
fail = usage(state,NULL);
break;
default: /* similar */
fail = usage(state,"unknown option");
break;
}
if (fail)
break;
}
return fail;
}
void
init_state(struct osdhud_state *state, char *argv0)
{
int i;
if (!argv0)
state->argv0 = NULL;
else {
char *base = rindex(argv0,'/');
state->argv0 = base ? base+1 : argv0;
}
state->kill_server = state->down_hud = state->up_hud =
state->countdown = state->stick_hud = state->unstick_hud =
state->foreground = state->hud_is_up = state->server_quit =
state->stuck = state->verbose = state->debug =
state->toggle_mode = state->alerts_mode =
state->cancel_alerts = 0;
state->pid = 0;
state->sock_fd = -1;
state->sock_path = NULL;
#ifdef DEFAULT_TIME_FMT
state->time_fmt = strdup(DEFAULT_TIME_FMT);
#endif
state->temp_sensor_name = NULL;
state->temperature = 0;
memset((void *)&state->addr,0,sizeof(state->addr));
state->font = NULL;
state->net_iface = NULL;
state->net_speed_mbits = 0;
state->net_tot_ipackets = state->net_tot_ierr =
state->net_tot_opackets = state->net_tot_oerr =
state->net_tot_ibytes = state->net_tot_obytes = 0;
state->delta_t = 0;
state->pos_x = DEFAULT_POS_X;
state->pos_y = DEFAULT_POS_Y;
state->nlines = 0;
state->line_height = DEFAULT_LINE_HEIGHT;
state->width = DEFAULT_WIDTH;
state->display_msecs = DEFAULT_DISPLAY;
state->t0_msecs = 0;
state->nswap = DEFAULT_NSWAP;
state->min_battery_life = DEFAULT_MIN_BATTERY_LIFE;
state->max_load_avg = DEFAULT_MAX_LOAD_AVG;
state->max_mem_used = DEFAULT_MAX_MEM_USED;
state->max_temperature = DEFAULT_MAX_TEMPERATURE;
state->short_pause_msecs = DEFAULT_SHORT_PAUSE;
state->long_pause_msecs = DEFAULT_LONG_PAUSE;
state->net_movavg_wsize = DEFAULT_NET_MOVAVG_WSIZE;
state->load_avg = state->mem_used_percent =
state->swap_used_percent = 0;
state->per_os_data = NULL;
state->net_ikbps = state->net_ipxps =
state->net_okbps = state->net_opxps = 0;
state->net_peak_kbps = state->net_peak_pxps = 0;
state->ikbps_ma = state->ipxps_ma =
state->okbps_ma = state->opxps_ma = NULL;
state->rxdisk_ma = state->wxdisk_ma =
state->rbdisk_ma = state->wbdisk_ma = NULL;
state->disk_rkbps = state->disk_wkbps =
state->disk_rxps = state->disk_wxps = 0;
state->battery_missing = 0;
state->battery_life = 0;
memset(state->battery_state,0,sizeof(state->battery_state));
state->battery_time = 0;
state->last_t = 0;
state->first_t = 0;
state->sys_uptime = 0;
for (i = 0; i < ARRAY_SIZE(state->osds); i++)
state->osds[i] = NULL;
state->osd_bot = NULL;
state->disp_line = 0;
memset(state->message,0,sizeof(state->message));
state->message_seen = 0;
memset(state->errbuf,0,sizeof(state->errbuf));
}
struct osdhud_state *
create_state(struct osdhud_state *state)
{
struct osdhud_state *new_state =
(struct osdhud_state *)malloc(sizeof(struct osdhud_state));
if (new_state) {
init_state(new_state,NULL);
#define set_field(fld) new_state->fld = state->fld
#define dup_field(fld) new_state->fld = state->fld? strdup(state->fld): NULL
#define cpy_field(fld) \
memcpy((void *)&new_state->fld, \
(void *)&state->fld, \
sizeof(new_state->fld))
set_field(kill_server);
set_field(down_hud);
set_field(up_hud);
set_field(stick_hud);
set_field(unstick_hud);
set_field(hud_is_up);
set_field(server_quit);
set_field(stuck);
set_field(debug);
set_field(toggle_mode);
set_field(alerts_mode);
set_field(cancel_alerts);
set_field(countdown);
dup_field(sock_path);
cpy_field(addr);
dup_field(font);
dup_field(net_iface);
set_field(net_speed_mbits);
dup_field(time_fmt);
dup_field(temp_sensor_name);
set_field(max_temperature);
set_field(pos_x);
set_field(pos_y);
set_field(width);
set_field(display_msecs);
set_field(short_pause_msecs);
set_field(long_pause_msecs);
#undef cpy_field
#undef dup_field
#undef set_field
}
return new_state;
}
void
cleanup_state(struct osdhud_state *state)
{
int i;
if (state) {
if (state->osds[0]) {
for (i = 0; i < state->nlines; i++) {
xosd_destroy(state->osds[i]);
state->osds[i] = NULL;
}
xosd_destroy(state->osd_bot);
}
probe_cleanup(state);
if (state->time_fmt) {
free(state->time_fmt);
state->time_fmt = NULL;
}
free(state->sock_path);
state->sock_path = NULL;
free(state->font);
state->font = NULL;
free(state->net_iface);
state->net_iface = NULL;
movavg_free(state->ikbps_ma);
state->ikbps_ma = NULL;
movavg_free(state->okbps_ma);
state->okbps_ma = NULL;
movavg_free(state->ipxps_ma);
state->ipxps_ma = NULL;
movavg_free(state->opxps_ma);
state->opxps_ma = NULL;
movavg_free(state->rxdisk_ma);
state->rxdisk_ma = NULL;
movavg_free(state->wxdisk_ma);
state->wxdisk_ma = NULL;
movavg_free(state->rbdisk_ma);
state->rbdisk_ma = NULL;
movavg_free(state->wbdisk_ma);
state->wbdisk_ma = NULL;
}
}
void
free_state(struct osdhud_state *dispose)
{
cleanup_state(dispose);
free(dispose);
}
/*
* Split str into words delimited by whitespace; returns number of words
*/
int
split(char *str, char ***out_words)
{
char *copy = NULL;
char *toke = NULL;
char *splitz[100];
char **splits = NULL;
int ntoke = 0;
int i = 0;
*out_words = NULL;
if (!str)
return 0;
copy = strdup(str);
assert(copy);
toke = strsep(©,WHITESPACE);
while (toke && (ntoke < ARRAY_SIZE(splitz))) {
splitz[ntoke++] = toke;
toke = strsep(©,WHITESPACE);
}
if (toke)
syslog(LOG_WARNING,"split too many tokens (> "SIZEOF_F") '%s'",
ARRAY_SIZE(splitz),str);
splits = (char **)calloc(1+ntoke,sizeof(char *));
assert(splits);
splits[0] = strdup("osdhud"); /* getopt(3) */
for (i = 0; i < ntoke; i++)
splits[i+1] = strdup(splitz[i]);
free(copy);
*out_words = splits;
return ntoke+1;
}
/*
* Free the results of calling split()
*/
void
free_split(int argc, char **argv)
{
if (argv) {
int i = 0;
for (i = 0; i < argc; i++)
free(argv[i]);
free(argv);
}
}
void
cleanup_daemon(struct osdhud_state *state)
{
if (state->sock_fd >= 0) {
close(state->sock_fd);
if (unlink(state->sock_path))
syslog(LOG_ERR,"could not unlink socket %s: %s (#%d)",
state->sock_path,err_str(state,errno),errno);
state->sock_fd = -1;
cleanup_state(state);
}
closelog();
}
void
clear_net_info(struct osdhud_state *state)
{
clear_net_statistics(state);
state->net_speed_mbits = 0;
}
/*
* Attempt to receive a message via our control socket and act on it
*/
int
handle_message(struct osdhud_state *state)
{
int client = -1;
int retval = 0;
struct sockaddr_un cli;
socklen_t cli_sz = sizeof(cli);
if (state->verbose)
syslog(LOG_WARNING,"accepting conn on sock # %d, HUD is %s",
state->sock_fd,state->hud_is_up ? "UP": "DOWN");
client = accept(state->sock_fd,(struct sockaddr *)&cli,&cli_sz);
if (client < 0)
syslog(LOG_WARNING,"accept(#%d) failed: %s (#%d)",
state->sock_fd, err_str(state,errno), errno);
else {
/* the client just sends its command-line args to the daemon */
FILE *stream = fdopen(client, "r");
char msgbuf[OSDHUD_MAX_MSG_SIZE+1] = { 0 };
char *msg = fgets(msgbuf,OSDHUD_MAX_MSG_SIZE,stream);
if (!msg)
syslog(LOG_WARNING,"error reading client: %s (#%d)",
err_str(state,errno),errno);
else {
int argc = 0;
char **argv = NULL;
struct osdhud_state *foo = create_state(state);
size_t msglen = strlen(msg);
/* The message is just command-line args */