diff options
| -rw-r--r-- | .gitignore | 8 | ||||
| -rw-r--r-- | Makefile | 11 | ||||
| -rw-r--r-- | main.c | 91 |
3 files changed, 110 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..8bfc5a5 --- /dev/null +++ b/.gitignore @@ -0,0 +1,8 @@ +.* +*.o +*~ +tags + +!.gitignore + +status diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..ac7c235 --- /dev/null +++ b/Makefile @@ -0,0 +1,11 @@ +PROGNAME=$(shell pwd | xargs basename) + +$(PROGNAME): main.o + gcc -s -o $@ $< + +%.o: %.c + gcc -c -pedantic -Wall -std=c99 -o $@ $< + +clean: + @echo cleaning... + @rm -f *.o *~ core.* @@ -0,0 +1,91 @@ +#define _GNU_SOURCE +#include <sys/sysinfo.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <assert.h> +#include <stdio.h> +#include <err.h> + +static char SYSPATH[] = "/sys/class/power_supply/BAT0/"; +static char charging[] = "↯"; + +static char *readline(char *dir, char *file) +{ + static char *line = NULL; + static size_t nbytes = 0; + + char path[512]; + ssize_t n; + FILE *fp; + + if (! dir && ! file) { + free(line); + return line = NULL; + } + + snprintf(path, sizeof(path), "%s%s", dir, file); + + if (! (fp = fopen(path, "r"))) { + warn("fopen %s", path); + _exit(1); + } + + if ((n = getline(&line, &nbytes, fp)) < 0) { + warn("getline"); + _exit(1); + } + + fclose(fp); + + assert(line); + + if (n && line[n - 1] == '\n') + line[n - 1] = '\0'; + + return line; +} + +static void print_battery_status(void) +{ +#define PRINT(...) str += snprintf(str, sizeof(status) - (str - status), __VA_ARGS__) + + static char status[512]; + + char *str = status; + + if (! strcasecmp("charging", readline(SYSPATH, "status"))) + PRINT("%s ", charging); + + int capacity = atoi(readline(SYSPATH, "capacity")); + + if (capacity == 100) + PRINT("full"); + else + PRINT("%d%%", capacity); + + printf(", bat: %s", status); + + readline(NULL, NULL); +} + +int main(int argc, char *argv[]) +{ + struct sysinfo si; + + if (sysinfo(&si) < 0) + return 1; + + printf("used: %ld", (si.totalram - si.freeram) * si.mem_unit >> 20); + printf(", free: %ld", si.freeram * si.mem_unit >> 20); +#if 0 + printf(", swap: %d", (si.totalswap - si.freeswap) * si.mem_unit >> 10); +#endif + printf(", procs: %d", si.procs); + + print_battery_status(); + + printf("\n"); + + return 0; +} |