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#include <stdio.h>
#include <string.h>
#include <time.h>
static const char MONTHS[12][4] = {"Jan\0", "Feb\0", "Mar\0",
"Apr\0", "May\0", "Jun\0",
"Jul\0", "Aug\0", "Sep\0",
"Oct\0", "Nov\0", "Dec\0"
};
static const char DAYS[7][4] = {"Sun\0", "Mon\0", "Tue\0", "Wed\0", "Thu\0", "Fri\0", "Sat\0"};
static const char PM[2][3] = {"AM\0", "PM\0"};
static inline void
cpu_get(char *b)
{
FILE *p = fopen("/proc/loadavg", "r");
char c = fgetc(p);
int i;
for (i = 0; i < 7 && c != ' '; i++) {
b[i] = c;
c = fgetc(p);
}
b[i] = '\0';
fclose(p);
}
static inline void
bat_get(char *b)
{
FILE *p = fopen("/sys/class/power_supply/BAT1/capacity", "r");
fgets(b, 3, p);
fclose(p);
}
static inline void
mem_get(char *b)
{
/* Returns "Volume: <v> [[Muted]]" */
FILE *p = popen("free -m | awk '/^Mem/{print $3}'", "r");
fgets(b, 16, p);
/* Truncate trailing newline */
b[strlen(b)-1] = '\0';
fclose(p);
}
static inline void
snd_get(char *b)
{
/* Returns "Volume: <v> [[Muted]]" */
FILE *p = popen("wpctl get-volume @DEFAULT_SINK@", "r");
while (fgetc(p) != ' ');
fgets(b, 16, p);
/* Truncate trailing newline */
b[strlen(b)-1] = '\0';
fclose(p);
}
static inline void
date_get(struct tm *tm)
{
time_t now = time(NULL);
localtime_r(&now, tm);
// unsigned char hr = tm.tm_hour % 12;
// if (hr == 0) hr = 12;
// snprintf(tmf, 21, "%s %s %02d %02d:%02d %s", DAYS[tm.tm_wday], MONTHS[tm.tm_mon], tm.tm_mday, hr, tm.tm_min, PM[tm.tm_hour/12]);
}
int
main(void)
{
static const struct timespec WAIT = { 2, 0 };
struct tm tm;
tzset();
char snd[16];
char mem[16];
char bat[3];
char cpu[7];
unsigned char hr = 0;
for (;;) {
date_get(&tm);
hr = tm.tm_hour % 12;
if (hr == 0) hr = 12;
snd_get(snd);
mem_get(mem);
bat_get(bat);
cpu_get(cpu);
printf("%s | %s | %s MiB | %s%% | %s %s %02d %02d:%02d %s\n", snd, cpu, mem, bat, DAYS[tm.tm_wday], MONTHS[tm.tm_mon], tm.tm_mday, hr, tm.tm_min, PM[tm.tm_hour/12]);
nanosleep(&WAIT, NULL);
}
}
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