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Re-write this according to my current c-taste

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This commit is contained in:
6arelyFuture 2022-06-19 17:19:50 +02:00
parent d57e410587
commit c3a4e27566
Signed by: Future
GPG Key ID: FA77F074E98D98A5
10 changed files with 216 additions and 197 deletions
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12
.clang-format Normal file
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@ -0,0 +1,12 @@
---
Language: Cpp
BasedOnStyle: LLVM
DerivePointerAlignment: false
PointerAlignment: Left
SortIncludes: false
# Regroup causes unnecessary noise due to clang-format bug.
IncludeBlocks: Preserve
---

2
LICENSE
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@ -1,6 +1,6 @@
BSD 3-Clause License
Copyright (c) 2021, Edoardo Sanguineti
Copyright (c) 2022, Edoardo Sanguineti
All rights reserved.
Redistribution and use in source and binary forms, with or without

11
common.c
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@ -1,15 +1,14 @@
#include <time.h>
#include <unistd.h>
#include "common.h"
// Prints the time
void printTimeStamp(FILE *fp)
{
void get_time_stamp(char* buf) {
time_t ltime;
struct tm result;
char stime[32];
bzero(stime, sizeof(stime));
ltime = time(NULL);
localtime_r(&ltime, &result);
asctime_r(&result, stime);
fprintf(fp, "\nTimeStamp: %s\n", stime);
asctime_r(&result, buf);
}

12
common.h
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@ -1,16 +1,8 @@
#ifndef COMMON_H
#define COMMON_H
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <strings.h>
#include <time.h>
#include <unistd.h>
void printTimeStamp(FILE *fp);
#define BUFFER_SIZE 4096
void get_time_stamp(char* buf);
#endif /* COMMON_H */

29
main.c
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@ -1,18 +1,16 @@
#include "common.h"
#include <stdio.h>
#include <signal.h>
#include <unistd.h>
#include "common.h"
#include "monitor.h"
volatile sig_atomic_t sigint_received = 0;
void sigint_handler(int a)
{
sigint_received = 1;
}
void sigint_handler(int a) { sigint_received = 1; }
int main(int argc, char *argv[])
{
if (argc < 2)
{
int main(int argc, char* argv[]) {
if (argc < 2) {
printf("Name of the program is missing\n");
printf("Usage: <name of the program>\n");
return 2;
@ -22,11 +20,16 @@ int main(int argc, char *argv[])
act.sa_handler = sigint_handler;
sigaction(SIGINT, &act, NULL);
setup(argv[1]);
int result = setup(argv[1]);
if (result) {
return 1;
}
while (!sigint_received) {
if (analyse()) {
return 3;
}
while (!sigint_received)
{
analyse();
sleep(10);
}

4
makefile
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@ -1,7 +1,7 @@
TARGET = prog
TARGET = monitor
LIBS = -lm
CC = gcc
CFLAGS = -O2 -g -Wall
CFLAGS = -O2 -g -Wall -std=gnu11
.PHONY: clean all default

185
monitor.c
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@ -1,165 +1,170 @@
#include "common.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include "monitor.h"
#include "utils.h"
#include <sys/types.h>
#include <signal.h>
#include "common.h"
#include "utils.h"
#include "monitor.h"
#define MAX_MEMORY 1048576
#define MAX_TRACK_SIZE 30
FILE *popen(const char *command, const char *mode);
FILE* popen(const char* command, const char* type);
int pclose(FILE* stream);
char* strerror(int errnum);
void printGenericStatusError()
{
static void print_generic_status_error() {
printf("Error while parsing file\n");
printf("Processes may be monitored incorrectly\n");
}
void checkStatus(FILE *file, int *currRealMem, int *peakRealMem,
int *currVirtMem, int *peakVirtMem)
{
static void check_status(FILE* file, int* curr_real_mem, int* peak_real_mem,
int* curr_virt_mem, int* peak_virt_mem) {
char result[BUFFER_SIZE];
bzero(result, sizeof(result));
memset(result, 0, sizeof result);
while (fscanf(file, " %1023s", result) == 1)
{
if (strcmp(result, "VmRSS:") == 0)
{
if (fscanf(file, " %d", currRealMem) == EOF)
{
printGenericStatusError();
while (fscanf(file, " %1023s", result) == 1) {
if (strcmp(result, "VmRSS:") == 0) {
if (fscanf(file, " %d", curr_real_mem) == EOF) {
print_generic_status_error();
return;
}
}
if (strcmp(result, "VmHWM:") == 0)
{
if (fscanf(file, " %d", peakRealMem) == EOF)
{
printGenericStatusError();
if (strcmp(result, "VmHWM:") == 0) {
if (fscanf(file, " %d", peak_real_mem) == EOF) {
print_generic_status_error();
return;
}
}
if (strcmp(result, "VmSize:") == 0)
{
if (fscanf(file, " %d", currVirtMem) == EOF)
{
printGenericStatusError();
if (strcmp(result, "VmSize:") == 0) {
if (fscanf(file, " %d", curr_virt_mem) == EOF) {
print_generic_status_error();
return;
}
}
if (strcmp(result, "VmPeak:") == 0)
{
if (fscanf(file, " %d", peakVirtMem) == EOF)
{
printGenericStatusError();
if (strcmp(result, "VmPeak:") == 0) {
if (fscanf(file, " %d", peak_virt_mem) == EOF) {
print_generic_status_error();
return;
}
}
}
}
int isProcessWild(int currRealMem, int peakRealMem,
int currVirtMem, int peakVirtMem, int ID)
{
if (currRealMem <= MAX_MEMORY)
{
static int is_process_wild(int curr_real_mem, int peak_real_mem,
int curr_virt_mem, int peak_virt_mem, int id) {
if (curr_real_mem <= MAX_MEMORY) {
return 0;
}
// Sends a polite request to terminate
printf("Terminating process: %d. Too much memory!\n", ID);
int result = kill(ID, SIGTERM);
if (result)
{
printf("Error while terminating process: %d\n", ID);
printf("Error message: %s\n", strerror(errno));
}
printf("Terminating process: %d. Memory: %d\n", id, curr_real_mem);
int result = kill(id, SIGTERM);
// Logs
FILE* fp;
fp = fopen("Diavolo.txt", "a");
if (fp == NULL)
{
fp = fopen("log.txt", "a");
if (fp == NULL) {
printf("Error while opening log.txt\n");
perror("popen");
exit(EXIT_FAILURE);
}
printTimeStamp(fp);
fprintf(fp, "WARNING: Exceeded %d KiB of Real Memory for process ID: %d\n", MAX_MEMORY, ID);
fprintf(fp, "Process ID: %d\ncurrRealMem:%d KiB\npeakRealMem:%d KiB\ncurrVirtMem:%d KiB\npeakVirtMem:%d KiB\n", ID, currRealMem, peakRealMem, currVirtMem, peakVirtMem);
fclose(fp);
return 1;
}
static int processID[MAX_TRACK_SIZE] = {0};
char time[32];
get_time_stamp(time);
void setup(const char *pid)
{
fprintf(fp, "\nTimeStamp: %s\n", time);
fprintf(fp, "WARNING: Exceeded %d KiB of Real Memory for process ID: %d\n",
MAX_MEMORY, id);
fprintf(fp,
"Process ID: %d\ncurr_real_mem:%d KiB\npeak_real_mem:%d "
"KiB\ncurr_virt_mem:%d KiB\npeak_virt_mem:%d KiB\n",
id, curr_real_mem, peak_real_mem, curr_virt_mem, peak_virt_mem);
if (result != 0) {
fprintf(fp, "Error while terminating process: %d\n", id);
fprintf(fp, "Error message: %s\n", strerror(errno));
}
fclose(fp);
return 1;
}
struct process_monitor {
int id;
int active;
};
static struct process_monitor processes[MAX_TRACK_SIZE];
int setup(const char* pid) {
char* command = va("pgrep %s", pid);
FILE* file = popen(command, "r");
if (file == NULL)
{
if (file == NULL) {
perror("popen");
exit(EXIT_FAILURE);
return 1;
}
char result[BUFFER_SIZE];
bzero(result, sizeof(result));
memset(result, 0, sizeof result);
int i = 0;
while (fgets(result, BUFFER_SIZE, file))
{
memset(&processes, 0, sizeof(struct process_monitor));
while (fgets(result, BUFFER_SIZE, file) && i < MAX_TRACK_SIZE) {
printf("Process ID: %s", result);
processID[i] = atoi(result);
i++;
processes[i].id = atoi(result);
processes[i].active = 1;
if (i >= MAX_TRACK_SIZE)
{
printf("Too many processes found\n");
break;
}
++i;
}
if (i == 0)
{
if (i == 0) {
printf("No process was found\n");
exit(EXIT_SUCCESS);
}
pclose(file);
return 1;
}
void analyse()
{
return 0;
}
int analyse() {
int i;
FILE* status;
int currRealMem = 0, peakRealMem = 0, currVirtMem = 0, peakVirtMem = 0;
int curr_real_mem = 0, peak_real_mem = 0, curr_virt_mem = 0,
peak_virt_mem = 0;
for (i = 0; i < MAX_TRACK_SIZE && processID[i] != 0; i++)
{
char *command = va("cat /proc/%d/status", processID[i]);
for (i = 0; i < MAX_TRACK_SIZE && processes[i].active == 1; ++i) {
char* command = va("cat /proc/%d/status", processes[i].id);
status = popen(command, "r");
if (status == NULL)
{
if (status == NULL) {
perror("popen");
exit(EXIT_FAILURE);
pclose(status);
return 1;
}
checkStatus(status, &currRealMem, &peakRealMem, &currVirtMem, &peakVirtMem);
if (isProcessWild(currRealMem, peakRealMem, currVirtMem, peakVirtMem, processID[i]))
{
processID[i] = 0;
#ifdef _DEBUG
printf("Checking %d\n", processes[i].id);
#endif
check_status(status, &curr_real_mem, &peak_real_mem, &curr_virt_mem,
&peak_virt_mem);
if (is_process_wild(curr_real_mem, peak_real_mem, curr_virt_mem,
peak_virt_mem, processes[i].id)) {
processes[i].active = 0;
}
pclose(status);
currRealMem = 0, peakRealMem = 0, currVirtMem = 0, peakVirtMem = 0;
curr_real_mem = 0, peak_real_mem = 0, curr_virt_mem = 0, peak_virt_mem = 0;
}
return 0;
}

4
monitor.h
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@ -1,7 +1,7 @@
#ifndef MONITOR_H
#define MONITOR_H
void setup(const char *pid);
void analyse();
int setup(const char* pid);
int analyse();
#endif /* MONITOR_H */

28
utils.c
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@ -1,21 +1,29 @@
#include "common.h"
#include <stdio.h>
#include <stdarg.h>
#include <threads.h>
#include "utils.h"
#define VA_BUFFER_COUNT 4
#define VA_BUFFER_SIZE 4096
char *va(const char *fmt, ...)
{
static char g_vaBuffer[VA_BUFFER_COUNT][VA_BUFFER_SIZE];
static int g_vaNextBufferIndex = 0;
thread_local struct {
char va_string[VA_BUFFER_COUNT][VA_BUFFER_SIZE];
int index;
} va_info_t;
char* va(const char* fmt, ...) {
va_list ap;
char *dest = &g_vaBuffer[g_vaNextBufferIndex][0];
bzero(dest, VA_BUFFER_SIZE);
g_vaNextBufferIndex = (g_vaNextBufferIndex + 1) % VA_BUFFER_COUNT;
int index = va_info_t.index;
va_info_t.index = (va_info_t.index + 1) % VA_BUFFER_COUNT;
char* buf = va_info_t.va_string[index];
va_start(ap, fmt);
vsnprintf(dest, VA_BUFFER_SIZE, fmt, ap);
vsnprintf(buf, VA_BUFFER_SIZE, fmt, ap);
va_end(ap);
return dest;
buf[VA_BUFFER_SIZE - 1] = '\0';
return buf;
}