1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
/*
* Open a file and read it, assuming it contains a single long value.
* Return 0 if we read a valid value, otherwise -1.
*/
#include <stdio.h>
#include <stdlib.h>
#include "kinit.h"
int getintfile(const char *path, long *val)
{
char buffer[64];
char *ep;
FILE *f;
f = fopen(path, "r");
if (!f)
return -1;
ep = buffer + fread(buffer, 1, sizeof buffer - 1, f);
fclose(f);
*ep = '\0';
*val = strtol(buffer, &ep, 0);
if (*ep && *ep != '\n')
return -1;
else
return 0;
}
|
