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refactor: Improve memory metric parsing #1291

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refactor: Improve memory metric parsing #1291

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41 changes: 11 additions & 30 deletions src/detection/memory/memory_linux.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,41 +12,22 @@ const char* ffDetectMemory(FFMemoryResult* ram)
return "ffReadFileData(\"/proc/meminfo\", sizeof(buf)-1, buf)";
buf[nRead] = '\0';

uint64_t memTotal = 0,
memAvailable = 0,
shmem = 0,
memFree = 0,
buffers = 0,
cached = 0,
sReclaimable = 0;

char *token = NULL;
if((token = strstr(buf, "MemTotal:")) != NULL)
memTotal = strtoul(token + strlen("MemTotal:"), NULL, 10);
else
return "MemTotal not found in /proc/meminfo";
uint64_t memTotal = 0, memAvailable = 0, shmem = 0, memFree = 0, buffers = 0, cached = 0, sReclaimable = 0;
const char* keys[] = {"MemTotal:", "MemAvailable:", "MemFree:", "Buffers:", "Cached:", "Shmem:", "SReclaimable:"};
uint64_t* values[] = {&memTotal, &memAvailable, &memFree, &buffers, &cached, &shmem, &sReclaimable};

if((token = strstr(buf, "MemAvailable:")) != NULL)
memAvailable = strtoul(token + strlen("MemAvailable:"), NULL, 10);
else
for(size_t i = 0; i < sizeof(keys)/sizeof(keys[0]); ++i)
{
if((token = strstr(buf, "MemFree:")) != NULL)
memFree = strtoul(token + strlen("MemFree:"), NULL, 10);

if((token = strstr(buf, "Buffers:")) != NULL)
buffers = strtoul(token + strlen("Buffers:"), NULL, 10);

if((token = strstr(buf, "Cached:")) != NULL)
cached = strtoul(token + strlen("Cached:"), NULL, 10);

if((token = strstr(buf, "Shmem:")) != NULL)
shmem = strtoul(token + strlen("Shmem:"), NULL, 10);
char* token = strstr(buf, keys[i]);
if(token)
*values[i] = strtoul(token + strlen(keys[i]), NULL, 10);
}

if((token = strstr(buf, "SReclaimable:")) != NULL)
sReclaimable = strtoul(token + strlen("SReclaimable:"), NULL, 10);
if(!memTotal)
return "MemTotal not found in /proc/meminfo";

if(!memAvailable)
memAvailable = memFree + buffers + cached + sReclaimable - shmem;
}

ram->bytesTotal = memTotal * 1024lu;
ram->bytesUsed = (memTotal - memAvailable) * 1024lu;
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