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#define _GNU_SOURCE
#include <stdio.h>
#undef _GNU_SOURCE
#include <stdlib.h>
#include "utils.h"
int write_int(const char *path, int val)
{
FILE *f;
f = fopen(path, "w");
if (!f) {
fprintf(stderr, "failed to open '%s': %m\n", path);
return -1;
}
fprintf(f, "%d", val);
fclose(f);
return 0;
}
int read_int(const char *path, int *val)
{
FILE *f;
f = fopen(path, "r");
if (!f) {
fprintf(stderr, "failed to open '%s': %m\n", path);
return -1;
}
fscanf(f, "%d", val);
fclose(f);
return 0;
}
int store_line(const char *line, void *data)
{
FILE *f = data;
/* ignore comment line */
if (line[0] == '#')
return 0;
fprintf(f, "%s", line);
return 0;
}
/*
* This functions is a helper to read a specific file content and store
* the content inside a variable pointer passed as parameter, the format
* parameter gives the variable type to be read from the file.
*
* @path : directory path containing the file
* @name : name of the file to be read
* @format : the format of the format
* @value : a pointer to a variable to store the content of the file
* Returns 0 on success, -1 otherwise
*/
int file_read_value(const char *path, const char *name,
const char *format, void *value)
{
FILE *file;
char *rpath;
int ret;
ret = asprintf(&rpath, "%s/%s", path, name);
if (ret < 0)
return ret;
file = fopen(rpath, "r");
if (!file) {
ret = -1;
goto out_free;
}
ret = fscanf(file, format, value) == EOF ? -1 : 0;
fclose(file);
out_free:
free(rpath);
return ret;
}
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