├── Makefile
├── README.md
├── justice.c
└── LICENSE


/Makefile:
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1 | 
2 | all: justice
3 | 
4 | justice: justice.c
5 | 	gcc justice.c -O2 -o a
6 | 


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/README.md:
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 1 | # Train-Terminator
 2 | 
 3 | compile, run, wait and then ^C to stop
 4 | 
 5 | ``` text
 6 | $ make
 7 | $ ./a
 8 | Process Name: java -jar w3ka.jar
 9 | mem = 29683M
10 | mem = 29432M
11 | mem = 29181M
12 | mem = 28930M
13 | mem = 28680M
14 | mem = 28430M
15 | mem = 28179M
16 | ...
17 | 
18 | ```
19 | 
20 | 


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/justice.c:
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 1 | #include <stdio.h>
 2 | #include <sys/mman.h>
 3 | 
 4 | long memtotal() {
 5 |   char buf[1024];
 6 |   char name[256];
 7 |   long value, sum = 0;
 8 |   FILE *f = fopen("/proc/meminfo", "r");
 9 |   while (fgets(buf, sizeof(buf), f)) {
10 |     sscanf(buf, "%s%ld", name, &value);
11 |     if (!strcmp(name, "MemAvailable:") || !strcmp(name, "SwapFree:"))
12 |       sum += value;
13 |   }
14 |   fclose(f);
15 |   return sum * 1024;
16 | }
17 | 
18 | int main(int argc, char **argv) {
19 |   const int PAGE_SZ = 4096;
20 |   const int R_SZ = PAGE_SZ * 64000;
21 |   long i, j;
22 |   printf("Process Name: ");
23 |   gets(argv[0]);
24 |   while (1) {
25 |     sleep(1);
26 |     long m = memtotal();
27 |     printf("mem = %ldM\n", m / 1024 / 1024);
28 |     if (m>R_SZ) {
29 |       if (!fork()) {
30 |         char *p = (char*)mmap(0, R_SZ, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
31 |         for (j=0; j<R_SZ; j+=PAGE_SZ) p[j] = 1;
32 |         sleep(900); // 15min
33 |         munmap(p, R_SZ);
34 |         return 0;
35 |       }
36 |     }
37 |   }
38 | }
39 | 


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/LICENSE:
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 1 | The MIT License (MIT)
 2 | 
 3 | Copyright (c) 2015 seanwupi
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 
23 | 


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