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/*
* getintfile.c
*
* 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>
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;
}
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