waybar version

build.ninja

@@ -24,6 +24,26 @@ build $builddir/compile_commands.json: regen_compile_commands ngen.toml || $buil
 build build.ninja: regen_ninjafile ngen.toml || $builddir/compile_commands.json
   pool = console
 
+# BEGIN TARGET main
+rule cc_main
+  deps = gcc
+  depfile = $dep
+  command = cc -I. -MD -MF $dep -o $out -c $in
+  description = Building $in -> $out
+rule link_main
+  command = cc  -o $out $in 
+  description = Linking $out
+
+build $builddir/main/obj: mkdir
+build $builddir/main/dep: mkdir
+
+build $builddir/main/obj/src-main.c.o: cc_main src/main.c
+  dep = $builddir/main/dep/src-main.c.o.d
+
+build $builddir/main/pss-total-waybar: link_main $builddir/main/obj/src-main.c.o |  || $builddir/main/obj $builddir/main/dep
+build main: phony $builddir/main/pss-total-waybar
+# END TARGET main
+
 # BEGIN TARGET debug
 rule cc_debug
   deps = gcc
@@ -40,8 +60,8 @@ build $builddir/debug/dep: mkdir
 build $builddir/debug/obj/src-main.c.o: cc_debug src/main.c
   dep = $builddir/debug/dep/src-main.c.o.d
 
-build $builddir/debug/pss-total: link_debug $builddir/debug/obj/src-main.c.o |  || $builddir/debug/obj $builddir/debug/dep
+build $builddir/debug/pss-total-waybar: link_debug $builddir/debug/obj/src-main.c.o |  || $builddir/debug/obj $builddir/debug/dep
-build debug: phony $builddir/debug/pss-total
+build debug: phony $builddir/debug/pss-total-waybar
 # END TARGET debug
 
 # BEGIN TARGET release
@@ -60,26 +80,6 @@ build $builddir/release/dep: mkdir
 build $builddir/release/obj/src-main.c.o: cc_release src/main.c
   dep = $builddir/release/dep/src-main.c.o.d
 
-build $builddir/release/pss-total: link_release $builddir/release/obj/src-main.c.o |  || $builddir/release/obj $builddir/release/dep
+build $builddir/release/pss-total-waybar: link_release $builddir/release/obj/src-main.c.o |  || $builddir/release/obj $builddir/release/dep
-build release: phony $builddir/release/pss-total
+build release: phony $builddir/release/pss-total-waybar
 # END TARGET release
-
-# BEGIN TARGET main
-rule cc_main
-  deps = gcc
-  depfile = $dep
-  command = cc -I. -MD -MF $dep -o $out -c $in
-  description = Building $in -> $out
-rule link_main
-  command = cc  -o $out $in 
-  description = Linking $out
-
-build $builddir/main/obj: mkdir
-build $builddir/main/dep: mkdir
-
-build $builddir/main/obj/src-main.c.o: cc_main src/main.c
-  dep = $builddir/main/dep/src-main.c.o.d
-
-build $builddir/main/pss-total: link_main $builddir/main/obj/src-main.c.o |  || $builddir/main/obj $builddir/main/dep
-build main: phony $builddir/main/pss-total
-# END TARGET main

install.sh

@@ -1,2 +1,2 @@
 mkdir -p /usr/local/bin
-cp build/release/pss-total /usr/local/bin
+cp build/release/pss-total-waybar /usr/local/bin

ngen.toml

@@ -2,7 +2,7 @@
 compile_commands = true
 
 [targets.main]
-outfile = "pss-total"
+outfile = "pss-total-waybar"
 compiler_flags = ["-I."]
 sources = [
   "src/main.c",

src/main.c

@@ -27,7 +27,7 @@ double read_file(const char *filename) {
         return 0;
         break;
       default:
-        perror("cannot open file pointer");
+        perror("cannot open file pointer to smaps");
         assert(fp != NULL);
         break;
     }
@@ -41,7 +41,7 @@ double read_file(const char *filename) {
 
     if (status == EOF) {
       if (errno != 0) {
-        perror("error reading file");
+        perror("error reading smaps file");
         ns_str_destroy(&line);
         return 0;
       } else {
@@ -67,7 +67,7 @@ double read_file(const char *filename) {
   return sum;
 }
 
-int main(int argc, char **argv) {
+double get_total_KiB(void) {
   DIR *proc_dp;
   struct dirent *proc_ent;
   Str smaps_path = {0};
@@ -108,40 +108,108 @@ int main(int argc, char **argv) {
 
   closedir(proc_dp);
 
-  if (argc == 2) {
+  return total_KiB;
-    if ((strcmp(argv[1], "--pretty") == 0) || (strcmp(argv[1], "-p") == 0)) {
+}
-      const char *prefixes[] = {"KiB", "MiB", "GiB"};
-      size_t i = 0;
-      while (total_KiB >= 1024 && i < 2) {
-        total_KiB /= 1024;
-        i++;
-      }
 
-      printf("%0.2f %s\n", total_KiB, prefixes[i]);
+size_t get_memtotal(void) {
-      exit(0);
+  FILE *meminfo_fp;
-    } else if ((strcmp(argv[1], "--help") == 0) ||
+  Str line = {0};
-               (strcmp(argv[1], "-h") == 0)) {
+  int status;
+  size_t memtotal;
+
+  errno = 0;
+  meminfo_fp = fopen("/proc/meminfo", "r");
+
+  if (meminfo_fp == NULL) {
+    perror("cannot open file pointer to /proc/meminfo");
+    assert(meminfo_fp != NULL);
+  }
+
+  ns_str_init_empty(&line, 256);
+
+  errno = 0;
+  status = ns_fget_line(meminfo_fp, &line);
+
+  if (status == EOF) {
+    if (errno != 0) {
+      perror("error reading meminfo");
+      ns_str_destroy(&line);
+      assert(errno == 0);
+    } else {
+      fprintf(stderr, "/proc/meminfo is empty... something is wrong.\n");
+      ns_str_destroy(&line);
+      exit(1);
+    }
+  }
+
+  status = sscanf(line.arr, "MemTotal: %lu", &memtotal);
+
+  if (status != 1) {
+    fprintf(stderr, "MemTotal is not on the first line of /proc/meminfo??? \n");
+    ns_str_destroy(&line);
+    exit(1);
+  }
+
+  ns_str_destroy(&line);
+
+  return memtotal;
+}
+
+int main(int argc, char **argv) {
+  const char *prefixes[] = {"KiB", "MiB", "GiB"};
+  const char *classes[] = {"low", "quarter", "half", "three_quarters",
+                           "nine_tenths"};
+  char mem_text[16] = {0};
+  size_t prefix_index = 0, classes_index = 0;
+  double total_KiB = 0, pretty_total = 0, percentage_use = 0;
+
+  if (argc == 2) {
+    if ((strcmp(argv[1], "--help") == 0) || (strcmp(argv[1], "-h") == 0)) {
       printf("DESCRIPTION\n");
       printf(
           "  pss-total: sum proportional set size of every process for "
           "accurate memory\n");
       printf(
-          "  usage statistics. In non-pretty mode, the number is given in "
+          "  usage statistics. This branch outputs json for use in waybar.\n");
-          "kibibytes.\n");
       printf("\n");
       printf("SUMMARY\n");
       printf("  pss-total [OPTIONS]\n");
       printf("\n");
       printf("OPTIONS\n");
-      printf("  -p, --pretty\n");
-      printf("      format output using sensible units: KiB, MiB, or GiB.\n");
-      printf("\n");
       printf("  -h, --help\n");
       printf("      print this help message.\n");
       exit(0);
     }
   }
 
-  printf("%.0f\n", total_KiB);
+  total_KiB = get_total_KiB();
+  pretty_total = total_KiB;
+
+  while (pretty_total >= 1024 && prefix_index < 2) {
+    pretty_total /= 1024;
+    prefix_index++;
+  }
+
+  snprintf((char *restrict)&mem_text, 16, "%0.2f %s", pretty_total,
+           prefixes[prefix_index]);
+
+  percentage_use = total_KiB / get_memtotal();
+
+  classes_index = 0;
+  if (percentage_use >= 0.9) {
+    classes_index = 4;
+  } else if (percentage_use >= 0.75) {
+    classes_index = 3;
+  } else if (percentage_use >= 0.50) {
+    classes_index = 2;
+  } else if (percentage_use >= 0.25) {
+    classes_index = 1;
+  }
+
+  printf("{\"text\":\"%s\",\"class\":\"%s\",\"percentage\":%f}\n", mem_text,
+         classes[classes_index], percentage_use * 100);
+
+  fflush(stdout);
+
   return 0;
 }

uninstall.sh

@@ -1 +1 @@
-rm /usr/local/bin/pss-total
+rm /usr/local/bin/pss-total-waybar