usr/kinit/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>

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