em/slstatus
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Add functions for measuring swap

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This commit is contained in:
Jody Leonard 2016-10-14 05:44:46 -04:00
parent 59ed3b6d8d
commit c60af317f3
1 changed files with 128 additions and 0 deletions
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128
slstatus.c
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@ -57,6 +57,10 @@ static char *ram_perc(void);
static char *ram_used(void); static char *ram_used(void);
static char *ram_total(void); static char *ram_total(void);
static char *run_command(const char *cmd); static char *run_command(const char *cmd);
static char *swap_free(void);
static char *swap_perc(void);
static char *swap_used(void);
static char *swap_total(void);
static char *temp(const char *file); static char *temp(const char *file);
static char *uid(void); static char *uid(void);
static char *uptime(void); static char *uptime(void);
@ -417,6 +421,130 @@ run_command(const char *cmd)
return smprintf("%s", buf); return smprintf("%s", buf);
} }
static char *
swap_free(void)
{
long free;
FILE *fp;
char buf[2048];
size_t bytes_read;
char *match;
fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
warn("Failed to open file /proc/meminfo");
return smprintf(UNKNOWN_STR);
}
bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
buf[bytes_read] = '\0';
fclose(fp);
if (bytes_read == 0 || bytes_read == sizeof(buf)) {
warn("Failed to read /proc/meminfo\n");
return smprintf(UNKNOWN_STR);
}
match = strstr(buf, "SwapFree");
sscanf(match, "SwapFree: %ld kB\n", &free);
return smprintf("%f", (float)free / 1024 / 1024);
}
static char *
swap_perc(void)
{
long total, free, cached;
FILE *fp;
char buf[2048];
size_t bytes_read;
char *match;
fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
warn("Failed to open file /proc/meminfo");
return smprintf(UNKNOWN_STR);
}
bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
buf[bytes_read] = '\0';
fclose(fp);
if (bytes_read == 0 || bytes_read == sizeof(buf)) {
warn("Failed to read /proc/meminfo\n");
return smprintf(UNKNOWN_STR);
}
match = strstr(buf, "SwapCached");
sscanf(match, "SwapCached: %ld kB\n", &cached);
match = strstr(buf, "SwapTotal");
sscanf(match, "SwapTotal: %ld kB\n", &total);
match = strstr(buf, "SwapFree");
sscanf(match, "SwapFree: %ld kB\n", &free);
return smprintf("%d%%", 100 * (total - free - cached) / total);
}
static char *
swap_total(void)
{
long total;
FILE *fp;
char buf[2048];
size_t bytes_read;
char *match;
fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
warn("Failed to open file /proc/meminfo");
return smprintf(UNKNOWN_STR);
}
bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
buf[bytes_read] = '\0';
fclose(fp);
if (bytes_read == 0 || bytes_read == sizeof(buf)) {
warn("Failed to read /proc/meminfo\n");
return smprintf(UNKNOWN_STR);
}
match = strstr(buf, "SwapTotal");
sscanf(match, "SwapTotal: %ld kB\n", &total);
return smprintf("%f", (float)total / 1024 / 1024);
}
static char *
swap_used(void)
{
long total, free, cached;
FILE *fp;
char buf[2048];
size_t bytes_read;
char *match;
fp = fopen("/proc/meminfo", "r");
if (fp == NULL) {
warn("Failed to open file /proc/meminfo");
return smprintf(UNKNOWN_STR);
}
bytes_read = fread(buf, sizeof(char), sizeof(buf), fp);
buf[bytes_read] = '\0';
fclose(fp);
if (bytes_read == 0 || bytes_read == sizeof(buf)) {
warn("Failed to read /proc/meminfo\n");
return smprintf(UNKNOWN_STR);
}
match = strstr(buf, "SwapCached");
sscanf(match, "SwapCached: %ld kB\n", &cached);
match = strstr(buf, "SwapTotal");
sscanf(match, "SwapTotal: %ld kB\n", &total);
match = strstr(buf, "SwapFree");
sscanf(match, "SwapFree: %ld kB\n", &free);
return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);
}
static char * static char *
temp(const char *file) temp(const char *file)
{ {