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Révision 339bfec6

ID339bfec68fc4c86da37c77710c16b0eee6426360
Parent 6dec8c33
Enfant 4a9b0e47

Ajouté par Steve Schnepp il y a plus de 10 ans

multicpu1sec-c: adding locking to avoid races

Voir les différences:

plugins/system/multicpu1sec/multicpu1sec-c.c
7 7 

  		




  8
  8
  
    
#include <time.h>


  		




  9
  9
  
    

  		




  
  10
  
    
#include <sys/file.h>


  		




  
  11
  
    

  		




  10
  12
  
    
#define PROC_STAT "/proc/stat"


  		




  11
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int fail(char* msg) {


  		




  ......




  98
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		fgets(buffer, 1024, f);


  		




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  100
  102
  
    
		/* open the spoolfile */


  		




  101
  
  
    

  		




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		FILE* cache_file = fopen(cache_filename, "a");


  		




  
  104
  
    
		/* lock */


  		




  
  105
  
    
		flock(fileno(cache_file), LOCK_EX);


  		




  103
  106
  
    

  		




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  107
  
    
		while (! feof(f)) {


  		




  105
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			if (fgets(buffer, 1024, f) == 0) {


  		




  ......




  128
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	printf("fetch()\n");


  		




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	FILE* cache_file = fopen(cache_filename, "r+");


  		




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  134
  
    
	/* lock */


  		




  
  135
  
    
	flock(fileno(cache_file), LOCK_EX);


  		




  
  136
  
    

  		




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	/* cat the cache_file to stdout */


  		




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	char buffer[1024];


  		




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	while (fgets(buffer, 1024, cache_file)) {


  		












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