Split into multiple files

[slstatus.git] / swap.c

diff --git a/swap.c b/swap.c
new file mode 100644 (file)
index 0000000..2a627c3
--- /dev/null
+++ b/swap.c
@@ -0,0 +1,135 @@
+#include <err.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "util.h"
+
+const char *
+swap_free(void)
+{
+       long total, free;
+       FILE *fp;
+       size_t bytes_read;
+       char *match;
+
+       fp = fopen("/proc/meminfo", "r");
+       if (fp == NULL) {
+               warn("Failed to open file /proc/meminfo");
+               return NULL;
+       }
+
+       if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
+               warn("swap_free: read error");
+               fclose(fp);
+               return NULL;
+       }
+       fclose(fp);
+
+       if ((match = strstr(buf, "SwapTotal")) == NULL)
+               return NULL;
+       sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+       if ((match = strstr(buf, "SwapFree")) == NULL)
+               return NULL;
+       sscanf(match, "SwapFree: %ld kB\n", &free);
+
+       return bprintf("%f", (float)free / 1024 / 1024);
+}
+
+const char *
+swap_perc(void)
+{
+       long total, free, cached;
+       FILE *fp;
+       size_t bytes_read;
+       char *match;
+
+       fp = fopen("/proc/meminfo", "r");
+       if (fp == NULL) {
+               warn("Failed to open file /proc/meminfo");
+               return NULL;
+       }
+
+       if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
+               warn("swap_perc: read error");
+               fclose(fp);
+               return NULL;
+       }
+       fclose(fp);
+
+       if ((match = strstr(buf, "SwapTotal")) == NULL)
+               return NULL;
+       sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+       if ((match = strstr(buf, "SwapCached")) == NULL)
+               return NULL;
+       sscanf(match, "SwapCached: %ld kB\n", &cached);
+
+       if ((match = strstr(buf, "SwapFree")) == NULL)
+               return NULL;
+       sscanf(match, "SwapFree: %ld kB\n", &free);
+
+       return bprintf("%d", 100 * (total - free - cached) / total);
+}
+
+const char *
+swap_total(void)
+{
+       long total;
+       FILE *fp;
+       size_t bytes_read;
+       char *match;
+
+       fp = fopen("/proc/meminfo", "r");
+       if (fp == NULL) {
+               warn("Failed to open file /proc/meminfo");
+               return NULL;
+       }
+       if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
+               warn("swap_total: read error");
+               fclose(fp);
+               return NULL;
+       }
+       fclose(fp);
+
+       if ((match = strstr(buf, "SwapTotal")) == NULL)
+               return NULL;
+       sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+       return bprintf("%f", (float)total / 1024 / 1024);
+}
+
+const char *
+swap_used(void)
+{
+       long total, free, cached;
+       FILE *fp;
+       size_t bytes_read;
+       char *match;
+
+       fp = fopen("/proc/meminfo", "r");
+       if (fp == NULL) {
+               warn("Failed to open file /proc/meminfo");
+               return NULL;
+       }
+       if ((bytes_read = fread(buf, sizeof(char), sizeof(buf) - 1, fp)) == 0) {
+               warn("swap_used: read error");
+               fclose(fp);
+               return NULL;
+       }
+       fclose(fp);
+
+       if ((match = strstr(buf, "SwapTotal")) == NULL)
+               return NULL;
+       sscanf(match, "SwapTotal: %ld kB\n", &total);
+
+       if ((match = strstr(buf, "SwapCached")) == NULL)
+               return NULL;
+       sscanf(match, "SwapCached: %ld kB\n", &cached);
+
+       if ((match = strstr(buf, "SwapFree")) == NULL)
+               return NULL;
+       sscanf(match, "SwapFree: %ld kB\n", &free);
+
+       return bprintf("%f", (float)(total - free - cached) / 1024 / 1024);
+}